koc-mp-027 part 2
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REV. {
OC.
NO. KOC-lrJlP{17
pART
2
{$.1.d)
{*,. Jþ-(Jl
Jâ-ci
aJr--*
KUUIJAIT
OIL
CüMPANY
{K.$ t.}
STANDARDS
PUBL¡CATION
KOç
RECOMIVIENDED
PRATTICE
FOR
PRESSURE RELIEF DEVISES:
SIZING,
SELECTION,
TWINNING AND
INSTALLATION
DQC.
NO.
KOC.MP-027
PART
3
STANDARDS
TEAM
dlrQ*
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DOC.
NO.
KOC-MP-027
pART
2
Page
2
of
64
REV.
1
KOT
RECOMMENDED
PRACTICE
FOR
PRESSURE
RELIEF
DEVITE$:
SIZING,
$ELECTION,
TWINNING
ANN
INSTALLATIGN
ttc"
N0.
K00-Mp-f ?7
PART
2
ISSUING
AUTHORITY:
STANDARDS
TEAM
.ì
,lt
I
2s/0v05
Futll?sûed
a$
KÐC ¡?P
Task
Fcrce
(TF,filiP/07)
üM",w
,{-
-fr'+""í
rr¡¿ 4llJ,r-W
ßay.
Oat¡
floscrþtfon
Senror
€ngrneor Strrrdd¡ds
FeL
tlttl
Ieam
LeaderSlandards
rcr.
tt69t
Prqpared
åy
E.
1.a
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Doc.
ilo
Koc-MP.0?7
PART
2
Page
3
of
84
REV.
l
TABLE
OF CONTENTS
FOREWORD
1.0 scoPE
2.0
APPLICATION
3.0
TERMINOLOGY
3.1
Definitions
3.2
Abbreviations
4.0
Paq.e No.
5
6
6
5.0
6.0
7.0
8.0
9.0
l5
15
16
16
REFERENCE
STANDARDS, CODES
AND SPECIFICATIONS
4.1
tlonflicts
4.2
List of
Standards
and Codes
4.3
Project
Specifications
4.4
Order
of
Precedence
ENVI ROF¡I\{F NTAL
CO N DITIO NS
HEALTH,
SAFETY
AND
ENVIRONMENT
PRD:
FUNCTION
AND
TYPES
OF
PRESSURE
RELIEF
DEVICES
PRD:
PRV
SIZING
PROCEDURE
AND REQUIREMENTS
PRD:
CìlTERlA
AND SELECTION
PROCEDURE
9,1
PRV
Selection Criteria
9.2 PRV
Selection
Procedure
12
12
12
'14
14
7
7
12
1B
18
18
10.0
PRD: SETTING;
TWINNING;
INSTALLATION; INLET/OUTLET
PIPING
19
10.1
PRV:
Pressure
Setting Requirements
19
10.2
Rupture
Disk
Requirements
20
10.3
trRV:
Twinning
Requirements
20
10.4
PRV:
Installation
Requirements
2'l
10.5
Rupture
Disk:
lnstallation
Requirements
22
10.6
PRD:
lnlet
Piping
Requirements
22
10.7
PRD: Outlet Piping
Requirements
23
10.8 PRD: Drain
Piping
Requirements
26
10.9
PRD: Bonnet and
Pilot
Vent
Piping
Requirements
26
l't,0
PRD: ISOLATION
VALVE
AND
CAR-SEAL
REQUIREMENTS 27
ø4tilþx
&
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2
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64
REV. 1
11.0 PRD:
INSTALLATION
ON
DRILLING
RIc.REQU|REMENTS
25
28
29
30
12.0
PRD:
PW
FFOR
ATMOSPHERIC
AND
LOW-PRESSURE
STORAGE TANKS
13.0 PRD:
THERMAL
RELIEF VALVE
14.0
PRD:
HANDLING
AND
STORAGE
15.0
¡NSPECTION
AND
TESTING
30
15,1
Pressure Relief Valve
(PRV)
30
15.2
Rupture
Disk
31
15.3 lnspection
and
Cleaning
of
System
before
PRV
lnstal¡et¡on
31
16.0 DOCUMENTATION
16.1
tSeneral
f 6.2
Deliverables
32
32
32
32
7.0
18,0
SPARE
PARTS
&
MAINTENANCE
DATA
APPEND]CES
33-62
APPEI{9gl_
DATA
SHEET: SPRING.LOADED
PRESSURE
RELIEF
VALVE
DATA SHEET: PILOT.OPERATED
PRESSURE
RELIEF
VALVE
DATA
SHEET:
RUPTURE
DISK
DEVICE
33
34
35
APPENDIX
2
PRD:
ltl-HOUSE
INSPECTION
AND
MAINTENANCE
REQUIREMENTS
36
APPENDIX 3
PRD:
TYPES, FUNCTIONAL
CHARACTERISTICS,
AND
USES
1.
Spríng-Loaded Pressure
Relief
Valve
(PRV)
2.
Pilot-Operated Pressure Relief Valve
3.
Rupture
Disk
(Non-Reclos¡ng
Pressure
Relief
Device)
4. PRV:
TABLE
FOR
SELECTION OF
ORlFlcE
SIZE
37
37
38
38
38
APPENDIX
4
PRD:
TYPES,
DESIGN
AND
GENERAL
DETAILS
39-46
APPENDIX
5
PRD:
TYPICAL INSTALLATION
AND
PIPING
47-62
ACKNOWLEDGEMENT
63
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REV. 1
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FOREWORD
This document
KOC
Recommended
Practice for
Pressure
Relíef Devices:
Sizing,
Selection,
Twinning,
and
lnstallation
(KOC-MP-027 PART
2)
is
intended
to
provide
the
basic
guidelines
and
minimum
technical
requirements
for sizing,
selection,
twinning
and
installation of
Pressure Relief
Devices
(PRD)
to be installed
on
pressure
vessels,
pressure
equipments,
pressure
systems,
and
atmospheric
and low
pressure
storage
tanks throughout
KOC
facilities
and installations.
This Recommended Practice
(RP)
has
been
approved by
the
Standards
Team,
in
consultation
with
the
Standards
Technical
Committee
(STC)
for use and
application
throughout
the
corporate
engineering
and
operational functions
of Kuwait
Oil
Company.
This Recommen,Jed Practice sets
out
to achieve the following
objectives:
//
To
specify basic
technical specifications
and
requirements
for
sizing,
selection,
twining
ano lnstallation
of
pressure
relief devices
that
have
applicabìlity
in
KOC
with
a
view
to
achieve
quality,
reliability,
efficiency
and
performance,
as
well
as
cost effective approach.
>
testing
requirements
of
Pressure Relief
Devices
so
as
to
minimize
the
need for
technical
clarifications and disputes,
>
and
envirorment as estâblished by
KOC
Fire
and
Safety
Regulation,
Health,
Safety and Environment
Management
System
(HSEMS)
and
HSE
Policy.
Feedback,
comments
or
suggestions,
derivecl from the
application
of
this RP at
any
stage
of
design,
purchase,
manufacture, field installation, operation,
and maintenance
are encouraged,
and
should
be
directed
to:
The
ïeam
Leader
Standards
(Chairman,
Standa rds
Technical
Committee)
lndrtstriaì
Services
Group,
KOC
P,
O. Box 9758, Ahmadi 61008, State of
Kuwait
Tasf
Fprge.Fpsponsible
for This Recommended
Practice
The
Standards
Technical Committee (STC) has
entrusted
the preparation of
this RP
to
the
Task
Force
No.
(TF-MPl07)
consisting
of the following:
Mr. Mirza Mohsin
Mr,
Raj Maharaj
Mr. Adnan
Bohammed
Mr.
Yousef M. Zaman
Mr. Nawaf
Al-Shehab
Mr. Mohammed
Al-Aimi
Standards
Team
Major
Projects Team
Design Team
Opns, Tech. Svcs.
(SK)
Opns. Tech.
Svcs.
(NK)
Opns.
Tech, Svcs,
(WK)
TF
Leader &
Author
Member
Member
Member
Member
Member
Ex
Ex
Ex
Ex
Ex
Ex
6137
1
66975
61815
22241
23437
20336
tl
d) Ð
o
(--
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2
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Þ
1.0 scQPE
1.1
This
Recornmended
Practice (RP)
describes
basic
technical
guidelines
and
requiretnents
for
$izing,
Selection,
Twinning,
lnstallation,
lnletlOr.rtlet
piping,
and
lnspection
and Testing
of
"Pressure
Relief
Devices"
for
installatìon
on
pressure
vessels,
pressure
equipment,
pressure
systems,
atmospheric
and
low
pressure
storage
tanks, and
pipelines
/
plant piping
with stranded liquids,
at
KOC onshore
facilities
and
installations.
1.2
Any
project
specific
requirement
shall be
furlher
elaborated
and described
in
KOC Data
Sheet
(Appendix-1)
and/or
Purchase Document.
2.0
APPLICATION
21
The
PressL¡re
Relief
Devices
(Pressure
Relief
Valve, and
Rupture
disk)
covered
in this
RP
are
intended
for
unfired pressure vessels (except
steam
boilers),
pressure
equipment,
and
pressure
systems
whose operating
pressure
is
103.¿
kPa (15
psig)
or
greater.
2,2
The
Pressure
Relief
Devices
(Pressure
Vacuum
Valve)
covered
in
this
RP are
intended
for
atmospheric
and low
pressure
storage
tanks
for
liquid
hydrocarbons
(sweet
or sour) and
designed
to
operate fronr
vacuum
through
103.4
kPa
(15
psig),
2.3 The
Pr,rssure
Relief
Devices
(Thermal
Relief
Valve)
covered
in this
RP
are
intended
for
relief
of
the
stranded
liquids
due
to
thermal expansion
in
the
tightly
closed
pipelines, plant
piping
and other
systems.
24
The
PF.D
covered in this
RP
are intended
to
protect
unfired
pressure
vessels,
equipments
and
pressure
systems including atmospheric
and
low
pressure
storage tanks
against
overpressure during
normal operating and emergency
conditions
such
as fire
contingencies.
2.5
The
PRD
covered in
this
RP
are
not intended
to
protect
pressure
vessels,
pressure
equipments,
pressurized
systems, and atmospheric
and low
pressure
storage
tanks, and
piping
from
structural
damage
or mechanical
failure
when
such items are exposed to extremely
high
temperatures
such
as during a fire.
¿.o This
RP
does not
cover
the
U-type
blow out
wet
legs,
the surface-safety-valve,
the
subsurface-safety-valve and
the
pressure relief
devices
installed
on
drilling
rigs anci its
associated equipment
and
vessels
etc.
2.7 This
RP
does
not cover
thermal relief valve of
size
less than
3/n
x
1
in
2B The
PFID
covered
in
this
RP
are
not
intended
for
use
on
pressure
vessels
that
are
used
for transportatron
of
liquid
hydrocarbon
in
bulk
on
the
roads.
"1,û
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3.0
3.1
31.1
3.1.2
TERryllNoLocY
Definitrons
For
the
purpose
of this
Rp,
the
following
definitions
shall
apply.
However
for
additional
details
refer
to
APt
520
and
Apt 576:
Accumulation
Accumrllation
is the
pressure
increase
over
the
maximum
allowable
working
pressure
of
the
vessel
during
discharge
through
the
pressure
relief
valvel
expressed
as
a
percentage
of
that
pressure,
or
actual
pressure
units.
Back
Pressure
This
is
the
pressure due
to
the
combined
effect
of
superimposed
and
built-up
back
pressure
in
the discharge
side of
the vafve.
a)
-ÐunerimposeO
g
superimposed
back
pressure
is
the static
pressure
in
the
discharge
lieader
before
the safety
relief
valve
opens.
b) Constant
Suoerimnosed
ressure
c)
This
type
of
back
pressure
remains
essentially
at
a fixed value
iconstant)
and
exists (superimposed)
continuously prior
to
and
during
opening
of
the
valve.
Variable
Supçilmposed
Backpressure
T his type
of
back
pressure
varies
or
changes
over
a range
from
a
minimum
to
a maximum,
or vice
versa.
The
actual back pressure
at
any
specific
time
depends
on
conditions
in
the
piping
system
to
rvhich
the
outlet
of
the
valve
is
connected.
3.1.3
Blowdcwn
Blowdcwn
is
the
difference
between
set
pressure
and
reseating
(closing)
pressure
of
a
pressure
relief
valve,
expressed
as
a
percentage
of
the
sãt
pressur e,
or
in
actual
pressure
units,
3.1.4
Built-up
Back
Pressure
Built-up
back
pressure
is
the
pressure
which
develops
at
the
valve
outlet
as
a
result
of
flow
through
the
valve,
after
the
pressure
relief valve
has
opened.
ry
ú
z
Þ
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3.1.6
3.1.7
3 1.8
3.1
,9
3.1 10
3.1.11
Car
Se:l
A
self-locking
seal
intended
for
sealing
or
locking
the
isolation
block valves
ínstalled
with
pressure
relief valves assembly,
wtren car-seal is
ptaceJ
in
position
and
closed,
it
locks
perfectly
and
securely
and
can
not
be opened
or
removed
unless
cut
with
the
wire
cutter
or
physically
broken
intentionally
in
order
to be
removed.
Closing
Pressure
The
closing
pressure
is
the
point
at
which
the
pressure
relief
valve
recloses.
This
signifies
the
value
of
decreasing
inlet
static
pressure
at
which
the
valve
disc
re-establishes
contact
with
the
seat
or
at which
tift
becomes
zero,
as
determrned
by
seeing,
feeling
or
hearing.
Cold Differential
Test
Pressure
(CDTP)
cold
differential
test
pressure
is
the
set
pressure
at
which
the
valve
is
adjusted
to open
on
the
test
stand.
This
pressure
inciudes
the corrections
for
back
pressure
and/or
temperature
and
service
conditions,
Conventional
Safety
Relìef
Valve
A
conventional
safety
relief
valve
is a
direct
spring
loaded
pressure
relief
valve
whose
operational
characteristics
i.e. opening
pressure,
closing pressure,
and
relieving
capacity
are
directly
affected
by
changes
in
the
back
pressure.
Flutter
Flutter
is the
abnormal,
rapid
reciprocating
nlotion
of
the
movable
parts
in
which the
disc
does
not fully
sit
on the
seat
of
a
valve.
Leak-Test
Pressure
It
is
the
specified
inlet
static
pressure
at
which
the
seat-leak
test
is
perfonned.
L¡ft
Lift
is
the
actual
travel
of
the
disc
away
from
the
closecl
position
when
a
valve
is
relieving.
3.1.12
KOC
Controlling
Tearn
Any KOC
Team
authorized
to
initiate
a request
for
procurernent
of
nlaterial
and/or
equipment
for
Koc,
or any
Koc
ream
that
conrrnands
and/or
manages
andlor controls
and/or executes
a
KOC
project.
ì
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3,1.13
3
1.'t4
3.1
,15
Manufacturer
/ Vendor
The
Manufacturer
or
Vendor
is the
original
equipment
manufacturer
or
its
authorized
company
responsible
to
deliver
/
supply
the
eguipment
and
on
whom
the
KOC
places
the
purclrase
order.
Maximum
Allowable
Working
Pressure
(MAWP)
The
maximum
allowable
working
pressure
ís
the
maximum
gauge
pressLrre
permissible
at the top of
a
complete
vessel
in its
normal
operating
position
at
the
designated coincident
temperature
specified for
that
pressure.
A vessel
may
not be
operated
above
this
pressure
at
any
metal temperature
other
than
that
used
in its
design.
consequently,
for that
metal temperature,
it is
the
highest
pressure
at
which
the
pressure
relief
valve is set
to
open.
Maximum
Operating
Pressure
(MOP)
The
maximum operating
pressure
is
the
gauge
pressure
which is
expected
or
anticipated
during
the
operation
of a
pressure
system
or
the vessel
or
equiprrent,
3.1.16
Non-re,:losing
Pressure
Relief Device
A
pressure
relief
devíce,
which
remains
open after operation
and
does
not
reclose
itself
unless
manually
reset or replaced.
Rupture
disk
is
an example
of
Non-reclosing device.
3,1.17
Opening Pressure
The
value
of the
increasing
inlet static
pressure
at
which
there
is
a
measurable
lift
of
the
disk or
at
which
the
discharge
of the
fluid becomes
contìnuous as
determined
by seeing, feeling,
or
hearing.
3.1
.18
Operatrng Pressure
The
operating
pressure
is
the
gauge
pressure
to
which
the
vessel
or
equipr'ent
is normally subjected
during service.
3.1.19 Overpr:ssure
Overprnssure
is a
pressure
increase
over the
set
pressure
of
the
pressure
relief
valve. Overpressure is
similar
to
accumulation
when
the
relieving
device
is
set at the
maximum allowable
working
pressure
of the
vessel.
The
overpressure
is
generally
expressed
as
a
percentage
of
set
pressure
or in
pressu.e
units.
o
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I
ER
3.1
.20
Pressu'e-Relief Valve
(PRV)
A
pressure
relief
valve
is
a
pressure-relief
device designed
to
open
and
relieve excess pressure and
to
reclose
and prevent further flow
of
fluid
after
normal
conditions
have
been
restored.
A
pressure-relief
valve
opens
when
its
upstream
pressure
reaches
the
opening
pressure,
lt then
allows
the
fluid
to
flow
until
its
upstream
pressure
falls
to
the
closing
pressure.
lt
then closes
prevenring
any
further
flow.
Examples
of
specific types of
pressure-relief
valve
include
Safety
Valve,
Relief-valve,
Conventional Safety Relief
Valve,
Balanced
Safety
R.elief
Valve,
and
Pilot-operated
Pressure-relief
Valve.
3.1.21 Pressu'e-Relief
Device
(PRD)
The
Pressr¡re Relief
Device comprises
of
the
Pressure
Relief Valve,
the
Relief
Valve, lhe
Safety
Relief
Valve, the
Safety Valve,
and
the Rupture
Disk etc.
As
such
the
PRD could
be
any
of
the
above device
intended
to
protect
the
pressure
vessels, equipment
and
personnel
by
automatically
opening at
predetermined
pressures
and
preventing
the destructive
consequences
due
to
excess:ve
pressures.
3.1.22
3.1.23
Pressure
Vacuum
Valve
(PW)
A weight
loaded,
spring-loaded
valve.
used
to
relleve
excess
pressure
and
lor
vacuum
that
has
developed
in an
atmospheric
or
low
pressure
storage tank.
Rated
t)apacity
Rated ,:apacity
is the
percentage
of
measured
flow at an
authorized
percent
overpressure
permitted
by the
applicable
code,
Rated
capacity is
generally
expressed
in kilograms
per
hour
(kg/hr)
or
pounds
per
hour
(lbslhr)
for
vapour;. For
gases
it
is
expressed
in
normal cubic
meters
per
minute
(NCMlrnin)
or
m'/min
or
standard
cubic
feet
per
minute
{SCFM),
and
for
liquids
in
litres
per
minute
(L/min)
or
gallons per
minute
(GPM).
3.1.24
Relief
\/alve
(RV)
A
relief
valve is a spring
loaded
pressure
relief
valve
actuated
by the static
pressuie
upstream
of
the
valve
and
it
opens
normally in
proportion
to
the
pressuie
increase
over
the
opening
pressure,
A
relief
valve
begins
to
open
when
the
static inlet
pressure reaches
set
pressure,
As
the
static
inlet
pressu'e
overcomes
the
spring
force,
the
disk
begins
to lift
off the
seat,
allowing
flow
of the liquid.
The
value
of
the
closing
pressure
is
less
than
that
of the set
pressure
and
wìll
be
reached
after
the
þlowdown
phase is
completed.
Relief
valves are
normally
used
for incompressible
fluids
i.e.
liquids.
&
*
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PART 2
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64
REY.1
+
ER
(iì
*
o
ú
3.1
.25
Relievirrg
Conditions
It indicates
the
inlet
pressure
and
the
temperature
of
a
pressure
relief device
during an overpressure
condition.
The
relieving
pressure
is
eqLral
to the
valve
set
pressure
(or
rupture
disk
burst
pressure)
plus
the
overpressure.
(The
temperature
of the flowing
fluid
at
relieving
condition
may
be
higher
or lower
than
th,:
operating
temperature.)
3
1.26
Safety
Relief
Valve
(SRV)
A safety-relief
valve
is a
spring-loaded
pressure
relief valve
that
may
be
used
as
either
a
safe$
valve (íntended
for
incompressible
fluids)
or
relief
valve
(intended
for compressible fluids) depending
on
the
application.
A safety
relief
valve
is
an
automatic
pressure-relieving
device
which
may
be
used as either
a
safety
or
relief valve
depending upon
application.
3,1.27
Safety
Valve
(SV)
A
safety valve
is
a
spring
loaded
pressure-relief
valve that
is
actuated
by the
static
pressure
upstream of
the
valve
and characterized
by rapid opening
or
pop
action.
When the
static inlet
pressure
reaches
the
set
pressure
it
will
increase
the
pressure
in
the
huddling chamber
and
overcome
the spring
force
on the disk. This
will cause
the
disk to lift and
provide
full
opening
at
minimal
overpressure.
A
safety
valve
is
normally
intended
for
compressible
fluids such
as
gas,
air or vapor etc.
3.1.28
Seat
ïightness Pressure
Seat
tlghtness
pressure
is
the
specified
inlet static
pressure
at
which
a
quantitative
seat
leakage test
is
performed
in
accordance
wìth
a standard
procedure.
3,1
,29
Set
Pressure
Set
pressr¡re
is
the
gauge
pressure
at
the
valve inlet, for
which
the
safety
relief valve has
been
set
to
open under
service conditions. In liquid
service,
set
pressure
is
determined
by the
inlet
pressure
at
which
the
valve
starts
to
discharge.
ln
gas
or vapour service,
the
set
pressure
is
determined
by
the
lnlet
pressure
at
which
the
valve
pops,
3.1.30 Simmer
Simmer is characterized
by
the
audible
passage
of
a
gas
or
vapor
across
the
seating
surfaces
just
prior
to
pop .
The difference
between
this
start
to
open
pressu-e
and
the
set
pressure
is
simmer,
and is
generally
expressed
as
a
percentage
of
set
pressure,
I
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2 Page '12
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R
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o
1'
3.2
Abbreviatjons
HSE
HSEMS
ITP
KOC
MAWP
MOP
PIM
PRD
PRV
PW
Health,
Safety
and Environment
Health, Safety
&
Environment Management System
lnspection
and
Test
Plan
Kuwait Oil Company
(K,S.C,)
Maximum
Allowable
Working
Pressure
Maximum Operating
Pressure
Pre-lnspection
Meeting
Pressure Relief
Devices
Pressure
Relief
Valve
Pressure
Vacuum Valve
4.0
REFERENCE
STANDARDS,
CODES AND
SPECIFICATIONS
4.1
Conflicts
ln
the
event
of a
conflict between this RP
and
the
standards
and
codes
or
specifications
referenced herein, or
purchase
or
contractual
requirements,
the
subject
shall be brought
to
the
attention of
KOC
Controlling
Team
for
review,
consideration,
and
resolution
or
amendment
by
Standards
Team,
if
required.
4.2
List of
Standa
and Codes
The
latest
edition
of
the following
standards,
codes and
specifications
shall
apply:
4.2.1
Nation¿rlllnternationalStandards
API
Stc
510
Pressure
Vessel lnspection
Code-Maintenance
lnspection,
Rating. Repair,
and
Alteration
API RP 520
Partlandfl
API
RP
521
API
Stc
526
APt
Srd 527
API
RP 576
API
RP
578
Sizing,
Selection, and
lnstallation of
Pressure
Relieving
Devices
in
Refineries:
Part
I
-
Sizing
and
Selection
Part ll-
lnstallation
Guide
for Pressure-Relieving
ancl
Depressurising
Systems
Flanged
Steel
Pressure
Relief
Valve
Seat
Tightness
of Pressure
Relief
Valve
lnspection
of
Pressure
Relieving
Devices
Material
Verificatìon
Program
for
New
and
Existing
Alloy
Piping
Systems
z
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ú
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DOC.
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PART
2
Page
13
of64
REV.
{
ER
API
Stc'2000
ASME
:3ec.
Vlll
Dívision
1
ASME
316
5
ASME
,331.3
ASME
PTC
25-2001
BS EN
ISO
4126
(Part
1-7)
BS
tSO
6264
BS
PD 5304
lso
90110
ISO
sOrl1
NACE
VlR
0175
/
tSO
15156
Part
1-3
Venting
Atmospheríc
and
Low-pressure
Storage
ïanks
Boiler
and
Pressure
Vessel
Code
Pipe
Flanges
and
Flanged
Fittin
gs
NPS
Through
NPS
24
Process
Piping
Pressure
Retief
Devices:
performance
Test
Codes
Safety
Devices
for
Protection
Against
Excessive
Pressure
Hydraulic
Fluid
Power-pressure
Relief
Valves-
Mounting
Surfaces
Safe
Use of
Machinery
Quality Management
Systems
-
Fr.lndamentals
and
Vocabulary
Quality Management
Systems
-
Requirements
Petroleum
and
Natural
Gas
lndustries.
Materials
for
Use
in
H2S-Containing
Environments
in
Oil
and
Gas
Production
Part
1;
General principles
for
Selection
of
Cracking-Resistant
Materials
-
part
2:
Cracking
Resistant
Carbon
ând
Low
Alloy
Steels,
and
the
Use
of
Cast
lrons
-
part
3:
Cracking-
Resistant
CRA
(Corrosion-Resistant
Alloys)
and
Other
Alloys
KOC
Standard
for
Hazardous
Area
Classification
KOC
Standard for
Basic
Design
Data
osHA
1e10.219
Mechanical
Power Transmission
Apparatus
4.2.2
KOC
Siandards/RP
KOC-c-002
KOC-G-007
KOC-G-009
KOC
Standard for
Spare
Parts
and
Maintenance
Data
KOC-l-,10'i
KOC
Standard
for fnstrumentation
and
Control
System
Design
Koc-MP-027 Parl1
Koc
standard
for
Pressure
Relief
Devices:
Design
and
Materials
*
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2
Page
{4
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REV-
1
381102r 01
KOC
Recornmended
practice
Qualification
and
Utilization
lnspection
Seruices
for
Selection,
of Third
Party
4.3
Koc-HSE
Document
Koc
Fire
and
safety
Regulations
(Latest)
Proiect
Specifications
ln
addition
to the
KOC
Standards
and
Recornmended
Practices
referenced
in
clause
4.2.2
above,
the
KoC
Controlling
Teams
shall
desígnate
other
relevant
speclfications
if
required,
for
the
titles
listed
below:
Title/Description
a)
General
lnstruments
b)
Recommended Practice
for
lnspection
and
resting
of
New
Equipment
gldF¡*eferecedgqce
The
supply
of
equipment,
materials,
services
and
documentation
shall
be
in
accordance
with
the
state
and local
regulations,
Data
sheets
or
purchase
Order
requirements
of
specific
project.
Should
any
conflict
exist
between
the
listed
documents,
then
the
most
stringent
shall
govärn,
ln
case
further
clarifícations
are
required,
the
subject
shall
be
brought
to
the
attention
of
KoC
controlling
Team
ín
accordance
with
clause 4.1
af tñ¡s
Rp
ln
generaf
the
following
sequence
of
precedence
shall
apply:
a)
l.(uwait
Government s
Rules
and
Regulations.
b)
KOC
Project
Data
Sheets
and drawings.
c)
KOC
Purchase
order
and
specifications.
d)
l-his
Koc RP
(Koc-MP-027
part
2)
and referenced
standardslRp
e)
[t/anufacturer s
i
vendor s
standards
and
specifications.
4.4
4.4.1
4.4.2
4.4.3
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REV.
T
5.0
5.1
E
NVIROIIM
ENTAL
COl,¡
DITIONS
The environmental
conditions
in Kuwait
are
severe.
Refer
to
KOC
Standard
for
Basic Design Datä
(Koc-G-007),
which
provides
the
basic
information
required
for
design such
as the
temperature,
wind,
environmental,
site
and
utility supply conditions
prevailing
throughout
the
KOC facilíties.
5.2
The
Pressure
Relief
Device(s)
(including
components)
covered
in
this RP shall
be
suitable for continuous
operation
in
the
environmental
conditions
specified
above.
6.0
HEALTH..åAFETY
ANÐ ENVIRONMEI.¡T
6.1
All
applicable
safety requirements
of Occupational
Safety
and
Health
Administration
(OSHA)
Standard
1910.219
and BS
PD 5304
shall
be
considered
in
the
desígn,
manufacture,
and
assembly
of
the
equipment
covered
by
this
RP,
6.2
The
ManufacturerÄ/endor/Contractor
shall comply with
KOC
Fire and
Safety
Regulaiions
and
KOC
Health, Safety & Environment
Management
System
(HSEMS)
for
the
protection
of
KOC
personnel,
adjacent
equipment,
property,
and
the
environment during
the design, manufacture.
assembly
or operation
and
maintenance
of
all equipments and
accessories covered
by this
RP.
z
*
\
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PART
2 Page
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64
REV.
,I
7.0
PRD: FUNCTION
AND
TYPES
OF
PRESSURE
RELIEF
DEVICES
ln all
pressurized
systems,
the overpressure
relief
can
be
achieved
with
a
variety
of
mechanisrns
which
include pressure relief
valves.
rupture disks
or
a
combination
of
the two devices.
7,1
7.2
ïhe
types of Pressure
Relìef
Devices
(pRD)
are described
as
under:
a)
Spring-Loaded
Pressure
Retief Valve
(pRV)
i)
Conventional
Type
ii)
Bellows
Type
iii)
Balanced
Bellows
Type
(with
Auxiliary Balancing
piston)
b)
Pilot-Operated
Pressure
Relief
Valve
c)
Rupture Disk
7,3
For additional
details
and
functional
characteristics,
distinctive
features,
types,
categories,
and
uses
of
PRD,
refer to Appendix-3
and Appendix-4
of
this
Rp.
8.0
PRD: PRV
SIZING P
AND
REQUIREMENTS
8.1
Spring-Loaded
Pressure
Relief
Valve
shall only
be used
on
pressure
vessels,
equipment,
pressurized
systems, and ahnospheric
and
low
pressure
storage
tanks.
B2
The
siz:ing
of
the
PRV should
be
done
in
accordance
with the
procedure
described in
API
520
Part
1.
8.3
When
sizing
PRV for
gas
or
vapors
service,
critical or subcrjtical
flow
condìtions
should be determined.
8.4 lf the
piessure
downstream of
the
PRV
is less than
or equal
to
the critical flow
pressure
P ¡
then
the
flow
will
be
critical, ln
such
condition
the
effective
discharge
area
required to
achieve a desired
flow
rate
should be
calculated
based
on equations as specified in clause
3.6.2 of
API 520
Part
l.
8.5
lf
the
ratio of
the
back
pressure
to
inlet
pressure
exceeds
the critical
pressure
ralio
Pr¡
lPr
(where
Pr
is
the
inlet
pressure
of the PRV
at
relieving conditions)
then tha flow
will
be
subcritical.
ln
such
situation the
effective
discharge
area
required to achieve a
desired flow should be
calculated
using
the
equations as
given
irr
clause
3.6.3 and 3.6.4
of
API
520
Part
l.
8.6
When
sizing PRV the
conditions
for the
overprotection
should
be evaluated
8,7
Particular consideration
should
be
given
to
deternrine various
contingencies
that are
the
basic cause of overpressure.
$uch contingencies must
be
evaluafed
in
terms
of
pressure generated
and the rate at which
the
fluid shall
be
relieved.
2
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pART
2
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6{
REV.
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,aY
o
ú
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*
B8
8.9
810
8.1
1
8.12
STEP:1
8.13
STEP-2
8,14
STEP-3
The
process
flow
diagram,
material
balance,
p&lD,
equipment
specification
sheet
and
design
basis must
be
considered
while
calculating
the
relieving
rates
required
for
PRV.
The
re,luired
PRV
orifice
area
(calculated
as
per
equations
gíven
in
Apl
520
Part
l)
¡hould
be
compared
with
the
standard
PRV
orifice
area
as
given
in
Apl
526 anC in
Taþle-1 of
Appendix-3
of this
Rp,
The
PRV orifice area
selected
from the
Table-1
must be
at
least
equal
to
or
greater
than
the
required
PRV
orifice
area.
The
guidelines
in
steps
described
below
may
be
adopted
for
basic and
preliminary
sizing
of PRV.
calculate
the required
PRV orifice
area
(A
in.2)
using
the equations as
provided
in clauses
3.6
to
3.10 of
API 520
Part
1.
For solving
the
above
referenced
equations
the following
basic
and
information
(data)
shall
be
requíred:
a)
O¡:erating
pressure
b)
Set
pressure
c) O¡reratingtemperature
d) Relievingtemperature
e) Relieving
pressure
0
Design temperature
g)
Ty,pe of
fluid
h)
Required
relieving
capacity
i)
Allowable
overpressure
(10 ,
or
16 ,
or
21a/o
I
j)
Back
pressure
k)
Gas
and
Vapour
(Compressibility,
Molwt.,
Density,
and
(CozC))
l) Liquids(Sp,Gravity,Viscosity)
Determine
the required
PRV
orifice
area
calculated
from equations
of
API
520
Pad 1.
ln
order to
make
a choice
between conventional
type,
bellows type, or bellows
type
with auxiliary
balancing
piston
PRV, check and confirm
the
back
pressure
and
otlrer
requirements
as
described in Clause
9.2
of
this RP. lf the back
prêssu:'ê
is
within
the
limits choose
the
conventional
type
PRV, otherwise
if
back
pressure
exceeds
the limit
go
for
bellows
type
PRV.
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?
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REV.
{
*
E
R
q
z
*
t-
8.15
STE
9.0
9.1
9.1.1
The operating
pressure
requirements
should
be
checked
against
the
valve
set
pressure.
lf
the operating
pressure
exceeds
g0%
of
thä
set
pressure,
orothen¡l;se if the differentíal pressure is less
than
25
psig,
analyse
and
examine
the system
and
the
valve
setting
parameters
in order
to
achieve
a
proper
differential
p
ressu
re.
PRD:
ÇRITEB¡A
AND
sEl-EcrtoNf
RocF
DU,F,E
PBV
Seleclipn
Critsria
The
PRV selection
criteria
shall be as
described
betow
briefly:
a)
Spring-loaded
type.
b)
Flanged type
¿Sce
Ctanse
8.
t.5
kt
tì.
t. r
t
u
KOC-,r.Íp-027
r\trt
r).
c)
l3olted
bonnet.
d)
Screwed
cap.
e)
Full
one
piece
nozzles.
0
.Suítable
for sour
service
(when
applicable)
9.2
BBY_9glection
PJocedure
9.2,1 PRV:
Conventional
Type
The
conventional
PRV shall
be
used
when
all
of
the
following
conditions
are
met:
a)
The sum
of
the
maximum
varrable
superimposed back
pressure
plus
the
built-up back
pressure
is
less
than
10%
of
the
PRV
set
pressure.
b)
Fouling or
corrosive service
conditions are not
expected
as
it may
affect
tha upper
part
of the
PRV.
9,2.2
PRV:
Bellows Type
ln
case the conditions specifìed
in
Clause
8.2.1
(a)
and
(b)
are
not
met, then a
bellows
type
PRV shall be used under
the
following
conditions:
a)
Ihe
sum
of
the
var¡âble
superimposed back pressure plus
the
built-up
back
pressure
exceeds
10%
of
the
PRV
set
pressure
or
cold
differential
set
pressure.
b) Fouling
or
corrosive conditions
are anticipated and
protection
cannot
be
afforded by using
alternative materials or
devices.
c) lf the service
fluid
is
highly viscor¡s or ûf
a nature
that it can enter
the
cr'tical clearances
between the
guidesldisc
holder,
)
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PART
2
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R.EV.
I
9.2.3
d)
lt is
essential
that
the
bonnet
of
a
bellows
type
PRV
when
installed,
shall
be appropriately vented
to
the
atmosphere.
PRV: Balanced Bellows Type
(with
Auxitiary Balancing piston)
The
balanced
bellows
type
PRV
with
auxiliary
balancing
piston
shall be used
under
the
following conditions:
a)
Back
pressure,
either
constant
or variable
is
present
or anticipated.
b)
Excessive
pressure
may
built-up
in
the
bonnet
as a
result
of
pressure
build-up
in the
bonnet-vent
piping
(as
a result
of buirt-up
bonnet
pressure,
a
perilous
condition
cot¡ld occur
any
moment).
c)
lt
must be ensured
that
when
balanced bellows
type
PRV
with
auxiliary
balancing
piston is installed,
their
bonnets are appropriately vented
to the
atmosphere.
10.0
PßQ:
SETTINQ;.IUlNNlNg;.IN TALLATION:
INLET
I
oUTLET
PtPtNG
10.1 PRV:
Pressure
Setting
Requirements
10.1
,1
The
pressure
settings
of
all
PRV
shall be carried out
in
accordance
with
the
rules,
procedures,
and requirements
of
ASME Section
Vlll
Div.1
.
10.1.2
The spring
in a
pressure
relief
valve shall
not be set
for
any
ptessure
more
than 5%
above or below
for which
the valve
is marked, unless the
setting
is
within
the
spring design range
established
by
and
acceptable
to
the
Manufacturer
or
his
authorized
vendor.
10,1
.3
1
0.1 ,4
10,1
5
10,1 .6
The initial
pressure
adjustment
shall be
performed
by
the
Manufacturer
or his
authori:ed
representative
in
their
shop
and a
data tag
shall
be
provided
at
the
valve
hody
that
shall identify the
set
pressure
and date.
The valve shall
be
provided
complete
with
a
seal identifying
the
Manufacturer,
and
his
authorized
rep
resentative
who
perforrned
th
e
adjustment.
The set
pressure
tolerances,
plus
or
minus,
of
pressure
relief
valves
shall not
exceed
2
psi (13,8
kPa)
for
pressures
up
to
and including 70
psi
(483
kPa)
and
3ol,
for
pressures
above
70
psi (483
kPa).
The
rnarked
capacity of a
PRV
when
installed
with a
rupture
disk
device
(See
Figure-8 of Appendix-4,
and Figure-7
of
Appendix-5
of this RP) shall be
multiplied
by
a
factor of
0.90 of the rated
relieving
capacity
of the
PRV when
used alone.
It
must
be
ensured
that
the
PRV
pressure
setting once done
as
per
KOC Data
Sheet shall not
be
altered
or
modified unless following
the
appropriate
and
relevart
KOC
procedure. (Also
see
Clause
15.1.6 of
this
RP)
{r'D
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NO.
KOC-MP.O27
PART
2
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20
of
ö4
REV.
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10,2
10.2:l
14.2.2
10,2.3
14.2,4
10.2
5
10,2,6
10.3
10.3.1
10.3.2
Ru
re Disk
Require
ts
The
rupture
disk
arone
shail
never
be
used
on any
pressure
vesser, pressureequipment, or pressure
systerns.
ln
case
ít
is
absorutery,,
genuinery,
and
specificaily
required
under
certain
conditions
as
mentioned
below
and'onry
after
written
lppàu"r
of
Koc:
a)
When
the
pressure
vessel
contaíns
material
that
may rencier
pRV
or
its
components
inoperative
due
to
choking
or
clogging,
or
b)
where
a
loss
of
valuable
material
by
leakage
should
be
avoided,
or
c)
Where
contamination
of the
atmosphere
by
leakage
ol
noxious
fluids
must
be
avoided,
or
d)
tlúhen
very
rapid
pressure
rise
are
anticipated
or encountered.
The
marked
capacity
of a
pRV
when
installed
with
a
rupture
disk
device
(see
Figure-B
of
Appendix-d
¿¡d
Figure-z
of
Appendi*-s"oi
this
Rp)
sr,"ù-uÀ
multiplied
by
a factor
of
0.90
of
itJrated
rerieving
."proty.
Alternatively
the capacíty
of
the combination
of the
rupture
disk
device
and
the
pressure
relief
valve
may
be
established
in accordan'ce
with the
requirer*nti
of
ASù*E
Section
Vlll
Div
1.
The
br,rst
pressure
tolerance
at
the
specified rupture
disk
temperature
shall
not
exr:eed
12 psi (r13.s
kpa)
of
the
marked
burst
pressure
up
to
and
t11yoi u
40
psi
(276
kPa)
and
*5yo
for
marked
þurst
påssure
above
40
psi
(276
kPa).
The
opening provided
through
the
rupture
disk,
after
burst,
shall
be
sufficient
to
perrrit
a flow
equal
to
the
capacity
of the valve
and
there
shall
be
no
chance
of
interference
wíth proper
functioning
of
the
valve.
But
in
no
case
this
area
silould
be less
than
the
area
of
the
inlei
of
the
valve
unless
tne
capacity
and
functioning
of the
specifìc
combination
of
rupture
disk
device
aná
pressure
relief
valve
have
been
established
by
test
in
accordance
with
the
requirenents
of
ASME
Section
Vlf I
Division
1.
PRV:
TWi
n n
itp
ß.e-q
Virçme.nts
Twin PiV
shall
be installed
on
all
pressure
vessels,
equipments,
and
pressure
systems,
atmospheric
and
low
pressure
storage
tanks
irrespective
of
pressute,
temperature,
or
service
fluids
and conditions.
The
PP,V
shall
be fitted
with isolation
block valves
with
Car-Seal
Open
facility,
*
o
t
z
\
A'-
q-D
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I
,.)
DOC.
NO. KOC.MP.Oz?
PART
2
Page
11
ofS4
REV 1
\t
l|.
E
10.3
3
1t.3.4
10.3 s
10,3.6
10,4.1
10.4.2
10,4.3
10.4.4
10.4
5
10.4.6
10.4.7
10.4
8
10.4
9
The isolation
block
valves
with
the facility
of
Car-Sealed-Open
shall
be used
to
help
remove
the
off
line
pressure
relief
valve
for
servicing
or maintenance
while
the
system
is
kept operating
with
the
second
pRV
oniine.
The
isclation valves
installed
with
pressure
relief
valves
shall
be
full-bore
roddable
type.
It should
be
ensured
that
both
the
twin
FRV
installed
on a
pressure
system
shall
be
identical
in
all
respect
including
size
and
capaciiy
and
prei.ur
setting
to
help
the
interchange
the
parts
and
reduce
the
inventóry.
For
details
showing
installation
of Twin
pRV,
{sofation
valves,
and
car-seals
gtc,
refer
to
Figure-10,
Figure-11,
Figure-12,
Fígure-13,
and
Figure-16
of
Appendix-5
of
this RP.
10.4
PRV:
lnstallatio
n
Reouirements
The
PRV installed
for
protection
of
pressurized
systems
from
overpressure
shall be
of
the
direct
spring
loaded
type in
accordance
with
ASMË
Section
V¡l
Div.1
u'lless othen¡¡ise
required
in
writing
by
KOC.
Each
relief
valve
shall
be
installed,
with
the spring vertical,
in
a
position
accês$,ble
for
inspection
and maintenance,
but
shall be
clear
of
waik
ways
where
relief noise
could
be
hazard
to operating
personnel.
The
piping
and its
support
shall
be designed
to
withstand
the
back thrust
or
pressure
when
the
valve
is
at
full
relief.
The valve
shall
not
be used
to
support
the doy¡nstream piping
or
any other
load.
The
vert
pipe
shall
be
positioned
so as
not
to cause any
hazard
to
personnel
or equipment
while
the
valve
is
relieving.
Ïhe
verlical
vent
legs
shall be
provided
with a
drain
hole
to
prevent
water
build
up
due
to
condensation
or
othenvise
in
the leg,
Appropriate canopy
or
cowl
should
be fitted
at the top of
verticalvent
to
prevent
entrance
of
rain
water.
The
pressure
relief
devices shall
be constructed,
located,
and
installed
so
that
they
are
readily accessible
for inspection.
replacement
and
repair,
ln the
:vent the
spring-loaded
PRv
is
not
fit
for
the
purpose
and does
not
meet
the
overpressure
protection
requirements,
the
pilot
operated
pressure
relief
valves
may be
considered
if it
is
absolutely,
genuinely,
and
specifically
necessãry and
only
after review
and
written approval
by KOC.
The
pressure
vessels
and
equipments
that are to
operate completely
filled with
liquid
shall be
protected
with
pressure
relief
devices designed for
liquid
service,
unless otherwise
protected
against
overpressure.
For
large
and lteavy
weight
PRV, an
appropriate
and
permanent
lifting
facility
shall
be
installed
for
servicìnglmaintenance
and
rernoval,
w
to
z
T
o
ú
*
ì
alØ
N¿
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)
NOC.
NO.
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FART
2
Page
22
of
84
10.5
10 5.1
'10.5
2
10.5
3
NOTE:
10,6
Rupture
Disk:
lnstallation
Requirements
Rupture
disk
shall not
be used
alone.
However
it
may
be
used
ín
conlbination
with
pressure
relief valve. See Clause
10.2
of
this
Rp.
When
a
rupture
disk is
installed
betr¡¡een
the
pressure
relief
valve
and
the
protected
vessel.
the
space
between
the
rupture
disk
and the
pressure-relief
valve
shall have
a
free
vent,
pressure
gauge,
trycock,
and
a
suitable
telltale
indicator
in such
a
way
that
it
shall
permit
detection
of
disk rupture
or
leakage
('\ce
F'i¿iure-,9
o,l
Áppendix-1,
onil
Figtre-7
n/'.1¡tpcncli.u-S
ol
thi,r
1?1,).
For
Additional
details
refer
to
API
520
Part il.
A
non-vented
space
in
the
rupture
disk
with a
pressure
gage
but without
an
alarm Õr warning
devìce
is
not
acceptable
as
a
suitable
equivalent
to
a telltale
indicator.
RËV.1
iyr
?'(1&,t¿
f
frf{?trð¡vCr
qf'
yJtf,Á
rr0jv
ûf;
fĿ-.q翡frf
fi}:'{.tf f r/d¿
y4
'Í'he
¡tìptng
wr¡rfu
¿¡¡rd
mecl¡¿¡í&"rrf
sv¡le¡ps
p¿rsfsrs
o
cl¡¡¡¡ø¿y.¡r¡s/;t
e"rt-r
,ts rcllrwlf.e<¡rcnr'*
u/
vibrttÍion
llre ¡a;lr*v/./i,eqrßncy
of,
vibtutitltl
cf
¡ter;rule
rrjisf
vrdlr-,r.
¡lpùrg
rrtx./er
suril
r¡*,,fxrrrice/
.$)':r/c¡rr.r
'¡c. ,J
¿ld/cr'¡r'rlllsry'
ój,
t'd¡lo¡rs
rN*1tr¡r¡cl*
rrrl
ul
alrrrr¡ lyir?s
åsr
/Àg
¡uûsr
t'etiqbte
¡¡lglåo¿{
l* lr,.,i¡
l'jRl/
is
'rvd¡ecling
/lie
pressrre
relr'elygfue
¡ü
a
is.rl
r,tt
t¡
,'ibn¡ring,
¡¿¡åle.
IÏre
¡'-lre,.rr¡r¡a
¡ef¡'ejf u*lr,ix
prxxersr)tg
J¡.¡r*'
r¿¡tr¡'ol
jt'e(luencieÍ
inr ¡cdltè
¡/¡or
¡¡le¡¡
.¡/racfi#si
desþrr
is
/çÀr*ei"qål
a¡dle"rr.{/*.
llutrevar
tåu.r*
¡a'cssrrr
rtlicf
vañy.r
u,Lr¡cÁ
¡:r¡¡;Ì,ruls
lrigå rnetrrrrrl¡feí¿¡enf.¡l
r¡f viÞ¿rritrr9.gxrrr/y
.rlr'.,ng
nncl robu., .structur¿l
deÍign.
?Ï?d
Üitrt;i'r¡rl{/t'
pr
inslctllsr
rs
tåc;'eþnr
lr,¿¡'ndd
r{f
ic ,'nstirl¡
û
¡JreJ.rrJrc{
relie{
r,alve
u'tth
n*tural
n];:lior
ùl;erú¡iotk?l r'rr¡ÈJ
vihrutitsn
problents
enrrsirrg
f,'es.rir¡e
ruficf
laÅ,*
¡o
r,r¡rrrl,
ù( a
v{:r1,
l¡.¡rr
s¿,l
¡?rrî.errrté:
dn¿l
slail
/ecrÁì'trg'.
Senercrlllt
tlre
prc,l'slrre
relíet
t'aives ¿rr"'$r"rrr1
sn¿
usgr
in
tl¡e
iulutt:
¿o):rcs$
fi
igh
notural
.lì"*;¡reircic.r.
EBPJ@
10 6.1
The
pressure-rel¡ef
valve
ìnstalled
on a
line that
dìrecfly
connects
to
a
pressure
vessel,
the
total non-recoverable
pressure
losses
in
that line shall
not
exceed
3
percent
of
the
set
pressure
of the
valve
(5Þc
Figure-1,
f,'igtra-z,
ITigure-:), ITigure-
Ì0. Itigure- I
.
und [;igure-
I
2
of .,l/rytendix-S
q/'
this
ItP).
For
additional
details
refer to
API
520
Part ll.
'10.6.2
The
pressure-rel¡ef
valve
when
installed
on
a
process
line,
the
3
percent
pressure
drop
limit shall
be
applicable to
the sum of the
losses in the normally
non-flo',ving
inlet
piping
of
pressure-relief
valve
and
the
incremental
pressure
loss
in
the
process
line caused
by the flow
through the
pressLrre-relief
valve
(See
I;igure-l
o/'Á¡tpentlivi
o/'this IIP).
For
additional
details
refer
to API
520
Part ll,
10,6.3
The iniet
or
upstream
piping
to
the
valve should
therefore
be ås
short as
possible
and direct from
the
pressure
vessel
to
PRV.
E
w
f
o
ú
z
*
o
ù/
1,,"V
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NOC.
NO,
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PART
r
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23
of
84
REV. {
'10.6
4
10.6.5
10.6.6
1067
10.6.8
10.7
10.7.1
10,7.2
10.7.3
10.7,4
1t,7.5
The
inlet
or
upstreanr
piping
of
PRV should
be
constructed
to
have
a
suitable
radius,
avoiding
sharp
corners,
in
order
to
permit
smooth
flow
of
fluíd.
lf this
is
not
possible,
then
the
ínlet
piping
size
should
be
enlarged
at least
to the
next
higher
size
(dianreter)
unless
otherwise
required
by
Koc,
(sea
[.igre-4
ol
Åppand;x-S
aI
rhi.r
t{ ,)
ln case
the
pressure
drop
is
more
than
30/o
of
the
set
pressure
when
the
valve
is
flow
ng
at
full
capacity,
the
inlet
pipe
size
should
be,
as
an
alternatíve,
enhanc;ed
to next
higher
size
to
avoid
the
pressure
drop
in
the inlet
piping
from
the
pressure
vessel
up
to the
valve
inlet.
The
pressure
losses
in
the
pressure-relief
valve should
be
calculated
based
on
its
rate'J capacity.
lf
there is
any
possibility
of blockage
or
plugging
of
pressure
relief
valve or its
associated
piping
as
a
result
of
fouling
characteristics
of
process
fluid,
an
appropriate
purge
system
is
recomrnended.
The
manufacturer
should
be
consulted
for
appropriate
recommendations.
The
process
faterals
shall
not be
attached
or connected
to
the
inlet
piping
of
the PRV.
lt should
be ensured
that
pressure
drop
at
the
inlet
of the
PRV
sha¡
not
exceed
the
limit under
simultaneous
conditions
of
rated
flow
through
the
PRV
end
maximum
flow
through
the
process
lateral,
(see
Figure-B
of
Appendix-S
of
this
RP)
P
RD: Outlet Pioino Reou
irements
The outlet
piping
shall
be constructed and
supported
in
such a manner
that
no
unnecessary
mechanical
loads
and
moments due
to
discharge
reaction
are
transferred
to the valve
body.
The
ou,tlet
piping
shall be
supported
near
to
centreline
of the
piping
to
help
minimize
or
prevent
undue
stresses
on the
PRV.
The
m;¡ximum
permissible
load
transferred
to
the
valve body should
not
be
more than the
cumulative
load of
a
companion flange,
a
long
radius elbow
and
a short
vertical
pipe
or otherwise as
recommended by
the
Manufacturer.
It
should
be
ensured that
the
thermal
expansion
of
piping
and the support
does
not
produce
any
stress and/or strains
in
the valve.
ln
such situations
a
spring
support is recommended.
The
discharge
piping
should
be
designed
and
constructed
to allow
vessel
expansion as
well
as
expansion
of
the
discharge
plpe
itseif
without
transm
tting any
undue
stresses
or
strains
on the valve. Care should
be
taken
parlicularly
when
discharge
lines
are
longer.
\
(lÞu-
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DOC.
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PART
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24
of
t4
REV.
T
E
10.7.6
14.7.7
10.7.8
10.7.9
1
0.7,10
Proper
consideration
should
be
given
to
discharge
pipe
movement
resulting
from
wind loads.
A continuar
oscillat¡on
of the
oislnarge piping
* y
g*n*rutã
stresses
leading
to
distortion
of
the
valve
body
and
as
a iesulithe
mãvement
of the internal
parts
may lead
to
leakage and malfunctioning.
Where
possible
the
drains
should
be
piped
away
to
prevent
the
collection
of
condensate
or
corrosive
liquid
in
the
valve
body,-
The
drainage piping
should
also
be supported
at
appropriate
locations.
when
wo
or
more valves
discharge
piping
is
connected
to
a
comrnon
header,
then
tl-e
built-up
back
pressure
resulting
from
the
opening
of
one
(or
more)
valve(s)
may
cause
a
superimposed
back
pressure
in
the remaining
valveá
connected
to
the same
header.
This
back
pressure
will
increase
the set
pressu'e
of the
remaining
valves
by the
amount
of
the
back
pressure,
unless
the bonnet
is
vented.
when
such
conditions
are
prevailing,
then
bellows
type
valve
is
recommended,
(Also
see clause g.2
of this Rp)
wrr¡cn
also
require
a
smaller
size
manifold.
The
Manufacturer
should
also
be consulted
in
such
situations
for
appropriate
recommendations.
The outlet
pipe
support
should
be appropriately
designed
and
located
in
order
to
preclude
or
minimize
the
reaction
forces
due to discharge
of the
pRV
that
may
generate
critical
dynamic
thrust.
The
amount
of
reaction
force
F
(due
to
gas/vapor
or
two
phase
discharge
in
a critical
steady-state
condition)
on
inlet
piping
due
to
open discharge
may be
computed
using
the formulae
given
below.
tt should
be
noted
that
the reaction
force
F
is
directly
proportional
to
discharge
area
A ,
rnass
flow
rate
of
vapours
w ,
static
pressure
at
discharge
p
and
ratio
of
specific
heats
(c/c,)
etc. (see
Figure-6 of
Appendix-5
of
this Rp).
For
additionat
details
refer
tc
API 520 Part
ll.
w
z
*
,T
o
ú
,i¡
'.)
qûÞ)
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K0C-ndP-027
PART
2
Page
25
of
64
REV.
f
10.7.1
1
The
following
equations
may
be
used
to calculate
the
amount
of
reaction
force
F
due to
gas/vapor
and
two
phase
discharge
in
a critical
and
steady-state
condition.
FOR
qAS
/-yAPOR
gJSCfrÁRGÊ:
W
KT
+
(AP)
366
(r+1)M
KT
[
=
129W
(k+1)M
FOR ÏWO-PHæE
ÐTSCHARGË
w2
{tJS
LJnits}
{Sf
imetric
Units}
+
A
(Pu-
Pu)
{uS
units}
+
(AP)
X
(1 -x)
F
+
2,898
Ëi0
6
A
Ps Pt
F
W2
-il
--t
¡
)
x(i
+
Ps
Pr
A
+
*--
(Pu-
P
)
lsumetric
units¡
1 000
2.96
A
Where
F
\r'V
T
fvl
A
R
F
Pr
Pt
X
F
Fä
Reaction Force,
Newton
(lbf)
Vapour
Flow,
kg/s
(lbm/hr)
Temperature
at outlet,
oK
(oR)
Molecular
Weight
of fluid
Area
of
Cross-bection at outlet,
mm21in2¡
(Cy'Ç,j;
Ratio
of Specific
heats
Static
Pressure
at Dischargq,
barg
(psig)
Vapor
density,
Kgtm'
(lbmift)
Liquid
density, Kg/m'
(lbmlft')
Weight
fraction
at exit
Absolute
pressure
at
exit,
kPa
(psia)
Absolute
ambient
pressure,
kPa
(psia)
d1¡9u-
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xt.
Koc-MP-027
PÂRT
?
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26
of 64
REV.
I
+
o
E
to
10.8
10.8.1
10.8
2
10,8.3
10,8
4
10.8.5
10.8.6
10.8.7
10.8.8
PRD:_D
rai n Piping
Requirements_
The
discharge
of
PRV
to
atmosphere
must be
drained
properly
to
prevent
the
accumulation
of
liquids
on the
downstream
side
of
the
pressure relief device
(See
Figure-1
of
Appendix-5
of
this
RP).
For
additionat
Oåtaits
refer
to
Apt s20
Part
ll.
The
outlet
piping
in
closed
systems
should
be
self
drained
to
a safe
liquid
disposol point
so
as
to
elirninate
the
need
for
a
physical
drain.
Approp:iate
drain
piping
should
be
provided
when
the PRV
location
is
such
that
liquid
nr:ay
accumulate
in
the
discharge
piping
that is
not
self
draining.
ln
this
situation
the
drain
piping
should
be installed
on
the
discharge piping
or
hooked
to
the
drain
point
if
provided
in
the
body
of
pressure
relief
valve.
The
rupture disk
is
a differential pressure
device
therefore
care
must
be
taken
to ensttre
that
the
disk rupture pressure
is
not
elevated
due
to
accumulation
of
fluìds
c.n the
vent
(atmospheric)
side
of
the
rupture
disk.
It should
be ensured
that
the
rupture
disk
discharge
line
is
clear
and
free
from
rain
water or
other fluids
that
could
cause
the
rupture
disk
to
activate
above
its
marked
burst
pressure,
Th-e
drain
piping
must
be
installed
in
such
a
way
that it does
not
adversely
affect
tre
PRV
performance,
The
low-point
drain
in
an open ended relief line
shall
be
at least
6
rnm (1i4
in,).
10.8.9 The
drain
piping
should be
installed
such
that
all
flammable,
toxic,
or
corrosive
fluids
are
piped
to an
appropriate
and
safe
location.
10,8
10
When
ttre
drain
piping
terminates
at
the
grade
with a
drain
valve
at the end,
it
should be
ensured
that
an appropriate
sight
glass
is
provided
to
allow
operating
personnel
to
observe
whether
or not
any liquid
is
accumulating
in
the drain
piping.
10.9
PRD:
Bonnet
and Pilot
Vent Pipjno
Requirements.
Appropriate
venting
of
bonnets
and
pilots
in balanced
bellows,
pilot-operated
and
others
types
of
PRV is
essential
in
order
to
ensure
proper
and
safe
operati,ln of
Pressure
Relief
Valve,
For
additional
details
refer
to
API
520
Part
ll.
(Also
refer
Figure-2
of
Appendix-S of this
RP),
*
î,
)
{ lþtÒ
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?
Page
27
of
64
REV.
1
ER
11
.1
11.2
11.3
11.4
{1.0
PRD: ISOLATION
VALVE
AND
ÇAR-SEAL.REQU|REIi.ENTS
The
isolation block
valves
shall be
used to isolate
a PRV
from
the
pressure
vessel for the
purpose of
maintenance or replacement.
The block valves
are also used
to
protect
the operation
of
PRV,
and
therefore
the block
valves
shoufd
be
fitted
with Car-Seals
to ensure
that the valve
has
not
been
operated or
handled
inadvertently
or otherwise,
The
isolation block valves
should therefore be
carefully
installed
and
administratively
controlled
to achieve
maxímum
safety
of
the system,
plant
and
the facility.
All
isolation
valves
installed
on
pressure-relíef
system shall meet the minimum
requirements
as described
below;
a)
The isolation
block
valves
shall
be
full
bore
and
roddable type
b) The minimum flow area of
the
isolation
valve
shall
be
equal
to
or
greater
tl an the
inlet
area
of
the
pressure-relief
valve.
c) T{e
isolation
valves
used shall be suitable
for
the
seruice
classification
d)
The
isolation
valves
shall
have
the
capability
of
being
locked
or
car
sealed open.
e) lt
is
recommended to
use block valve
for
isolation
purposes
on
pressure
vessels
and other
pressurized
systems.
However,
gate valve may
be
used
for
isolation
provided
they
are
properly
installed
with
stems
oriented
horizontally
or if
this
is
not
feasible
then
the
stem
should
be
oriented
downward
to
a
maximum of 45
degrees
from
the
horizontal
to
keep the
gate
from
falling
off
and
blocking
the
passage
of
flow.
0
The isolatìon
valves
recommended
for atmospheric and
low
pressure
storage
tanks
should
be
butterfly
type.
(Also
see
API
RP 2000).
g)
A
bleed
valve
shalf
be installed
on
isolation
block
valve
to
enable
the
s)fstem
to be safely
depressurized
andiar
drained
prlor
to
dismantling
of
PIV
for overhaul,
maintenance,
or
replacement.
h)
lt should
be
ensured that
the sequencing
of
interlocking
system between
iniet
and
outlet
isolation
valve
is
fool-proof.
i)
The
isolatìon
valve
should
be
painted
with
special color
or
otherwise
provided
any
other
identification
after
installation.
j)
Tlre
isolation
valve
should
be opened
gradLrally
to help
prevent
sudden
and
undesired
pressure
and
to
avoid
fluid momentum
from
pushing
the
valve
seat
rapidlY.
z
o
ú
*
\
\----
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DOC.
NO.
KOC-MP-027
PART
â
Page
28 of
64
REV,
1
k)
l'he
car-seal
should
be
strong
enough
to
resist
any
ordinary
mechanícal
shock or
blow.
l)
The
car-seal
shall not
be
abfe
to
be
removed,
when
installed Ín
place
and locked open,
physically
and intentionally.
m) The
car-seal
shall
not
be
able
to
be
cut
or
removed,
when instailed
in
place
and
locked
open,
except by
wire cutters
or
strong
or
forceful
hammering.
n)
Fefer
to
Figure-9,
Figure-11,
Figure-13,
and Figure-16
of
Appendix-S
of
this RP
showing
typical
arangement
of isolation
valves.
BD:_PYV
FoR
ATMOSPHERIC
AND
LOW-PRESSURE
$TORAGE
TAl,tKS
The
Pressure
Vacuum Valve for
atmospheric
and low
pressure
tanks
shall
be
in
accordance
with API
Std,
2000.
The
Pr-'ssure
Vacuum Valve
installed
on low
pressures
storage
tanks shall
be
sized
and
set
such
that
it
shall
not
allow
the tank
internal
pressure
to
exceed
its
maximum
design
pressure
limit under normaloperating
conditions.
The
PW
intended
for use
on
atmospheric
and
low
pressure
tanks shall be
spring-loaded
type.
The
PW
intended to
be
installed
on
atmospheric
and
low
pressure
tanks
shall
be
flanged
type.
The
type,
minimum
ratings,
and
class
of
the
inlet
/outtet
flanges
of
the
spring-
loaded flanged
type PW
shall
be
ASME
B
16.5, RF,
150
ratings,
and
the
class
s¡all
comply with tank
service and operating
conditions
and KOC Piping
Material
Classes, unless
otherwise
required
by
KOC.
Normal
venting may
be
accomplished
with
or
without
a flame-arresting device
or as
required
by
KOC.
The
Relief devices
equipped
with a
weight
and lever
arrangement
shall
not be
used.
The
PtÂ/ shall
be
designed
such
that
in
the
event of
failure of any
of
its
essential
parts,
the
PW
shall never
fail
to
protect
the
tank it
is installed
on.
The
M¡nufacturer
/
Contractor
before
installation
of
PW
on the
tank
shalf
ensure
that
the
requirements
of
a
frangible
roof-to-shell attachment
of the
tank, as
specified
in
AFI
650, are
strictly
followed and met.
12.9 Also
re;er
to Clause
8.4
of KOC-MP-027
Part l
12.t
12.1
122
12.3
12.4
12.5
12.6
12.7
12.8
0-
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Pago
29
of
64
REV,
,|
E
13.3
13.4
13.0 PRD: IHERMAL.RELIEF
VALVE
13,1 The
thermal relief valve
shall
be
installed
on
all
such
sections
of
the
pipeline
carrying
liquid
hydrocarbons,
wherein
the
liquid
is
completely
btocked
or
trapped,
and
is
subject
to
expansion
due
to
rise
in environment
temperature,
and
as
a
result
the
internal
pressure
rises
that may
exceed
the
maximum
allowable operating
pressure
of
the system.
13.2
This
thermal
relief valve shall
be
in
accordance
with API RP
521
The
thermal
relief valve
shall be
instâlled
in
the
following
conditions,
unless
othen¡vise
required by
KOC:
a) On each
section
of
the
cross-country
pipelines
between
main
block-
valves,
when
the
above
ground
length
of
that
pipe
exceeds
10
of
the
total length
of
that section.
b)
On
each
section
of
above
grade plant
piping
carrying
liquid
which
is
blocked-in or trapped
by tight closing
valves
and
blinds.
Cn
the
inlet
píping
in
the
heat exchanger
in
which
the
liquid
is
blocked
and
heated between
the
block
valves.
d)
3n
section
of
piping
which
lies
between the storage
tanks,
or
in
the
iank farm,
in
which the trapped liquid expands between the block
vafves.
The
set
pressure
of
the
thermal
relief valve
shall not exceed
110
of
the
maximum
allowable operating
pressure
at
the
maximum
temperature with
consideration
to
pipe
hoop stress,
combined stress,
flange
ratings.
and
any
other weakest
component
of
the system.
13
5
The
location
of
the
thermal
relief
valve
on
sect¡ons
of
cross country
pipeline
shall
tre
selected by
KOC
based
on
accessibility.
valve
safety,
and
parameters
The thermal
relief valves
which
are
not
located
within
a
fenced area shall
be
provided
with suitable
cover
to
prevent
tampering or damage.
The
outlet
of
thermal
relief
valve
ìnside
a
plant
area handling
hydrocarbons
or
toxic
liquids
shall
be
piped
to
a closed
piping
system.
The
ouget
of
thermal
relief
valve
installed
on the
pipelines,
which
releases
hydrocarbons
shall
discharge
at
the
grade
or
as
required
by
KOC.
For
additional
details
refer
to
Clause
8.5 of
KOC-MP-027
Parl1.
13.6
13.7
13
8
13
9
*
o
ú
)
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30
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64
REV
1
ER
o
14.0
14.1
14.2
143
14.4
14.5
146
15.0
15.1
1
5.1
.1
15.1,2
15,1
3
15.1.4
15.1.5
PRD:
HANDLING
AND
STORAGE
The
ínternal
parts
of
a
pressure
relief
valves
are
precision
machined
and
fitted
closely
and
securely
to
maintain
perfect
atign;eni.-'
Rougn
handling
may
damage
the seats
or
cause
misalignment
of
ihese
parts
to
incur
leakage
or
erratic
operation.
It
is
recommended
that
the
pressure
relief
valves
should
þe
handled
carefully
and
delicately.
Necessary
care
should
be
taken,
*rruÀ
Þnv
are
intended
to
be
stored
such
that the
protective
end
covering
shourd
not
be
removed
and
be
left
intact
until
installation.
Additicnally
it
is
recommended
to
store
all
pressure
relief
devices
indoors
in
a
clean
and
dry environment
and
on
pellets.
lf
this
is
not
possible,
then the
valves
must
be
at
least
protected
with
a
suitable
covering
in
order
to
prevent
ingress
of
dust,
dirt,
water
or
moisture,
foreign
material,
and
crawling
bugs
/
insects.
All
pressure
relief
devices
should
be
handled
carefully
and
should
not be
subjecled
to
shocks
which
may
render
considerabre
internar
damage
or
misalignment
of
parts
or affect
the valve
seat
tightness
adversely.
Fol
requirements
and
guidelines
regardrng
in-house
inspection
and
maintenance
of
pressure
relief
devices
refãr
to
Àppendix-2
of this
Rp.
rNsPqcr¡o¡¡
Al¡J)
rEsÏNq
Press.ure
Relief
Valve
ÍPRV)
The
Contractor
should
check
visually
the condition
of
the
pressure
Relief
Valves
before installation,
Consult
the
Manufacturer's
instructions
manual
for
details
relating
to
any
specific
pressure
relief
valve.
The
Contractor
shall
ensure
that all
protective
material
on
the
valve
flanges
and
an'¡ extraneous
materials
inside
the
valve
body
and
nozzle
are
compleiely
removed.
The ccntractor
should
check and
ensure
that
the
bonnet shipping
plugs
have
been
removed
from
balanced pressure-relief
,¡alves
prior to installation,
The
interior
of the
pressure
relief valve
must be
thoroughly
cleaned
in order to
prevent
any
foreign
material
that
may
damage
the
seats
during
operation
or
othenvise
render
the
valve
to
malfunction if
trapped
somewhere
between
the
seats during operation,
All
PR\/
should be
thoroughly
and
accurately
tested
before installation
to
confirm
their
set
pressure.
t'
o
ú
*
\'
)
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)
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RE\¡
I
R
15.1
6
15.1.7
15.2
15
2.1
15.2.2
15.2,3
15.2.4
15.2.5
15.3
15.3.1
15 3,2
15,3,3
Koc
rrocedure
for
testing
and
handling
pressure
Relief
Devices
(safety
valves,
safety
Relief
Valves,
and
pressuie
vacuum
valves)
requires
that
all
such
vafves
be assigned
Z-Number
and
tested
before
installation.
Also
Koc
requires
that
ail
such
varves
which have
been
,to*J
in
excess
of
three
month;
shall
be
reset
prior
to
installation
at
the
relevant
equipment.
The
Z_
Numbers
are
normaily
assigned
in
riaise
with
Koc
Centra'r
workshop
anã
lnspection
&
Corrosion
Teams.
The
testing
of
pRV
shall
be
subject
to
validation
during
shop
testing
and
before
installation.
This
shall
consist
of
three
testing
in
seiies.
rrre
pnri
musi
activate
-at
the
set
pressure
on
each
test.
At
all
threã
testing,
if
the
activation
is
successful
the
PRV
is
then
Validated.
lf
any
of
the
test fails,
all
three
tesi
should
be repeated
again
after
appropriate
adjustment.
RuptHre,.DisF
The
ccntractor
should
ensure
that
all
rupture
disks
have
been
thoroughly
inspecled
before
the
installation
according
to the
Manufacturer's
instruction
manual.
The
Contractor
shall
also
check
that
seating
surfaces
of the
rupture
disks
holder
s
perfectly
clean,
smooth
and
undamaged,
The
rupture
disk
should
be
visualty
checked
for
any
physical
damage
to the
seating
surfaces
or
the
pre-bulged
disk
area.
ïhe
c¡ntractor
should
never
use any
rupture
disk
with
seating
surface
damaged or dented.
The
contractor
shall
apply
the
proper
instailation
technique
and
torquing
procedrtre
as recommended
by the rupture
disk
Manufacturer.
lnspection
and
Cleanino
of
9ystem
befo.re
pRV
lnstallatioq
The
Ccntractor
shall check
and
ensure
that
the system
on
which
the
pressure
relief
valves
are
tested and
finally
installed
is
thoroughly
cleaned and
free
of
any
foreign
material
in
order
to
prevent
the valve
from
contaminatìon
that may
cause
damage
to
the
valve
seat
or
render
ìt
to malfunction
if
foreign
material
is
trappec
somewhere
in
the
seat.
ln
particular
all
new
systems on
which
pressure
relief
valve
is intended
to be
installed shall
be checked
and
cleaned
thoroughly
so
that
they
do
not
contain
any
welding
beads,
pipe
scale,
debris, or
other objects
that may
inadvertently
be trapoed during
construction
and subsequently
damage
the
seating surface
of
the
valve
during
operation,
All
pressure
relieving devices
should
be removed
or
isolated
before
hydrotesting
or
pneumatic
pressure
testing of
the system either
by blanking or
closing
of
the isolation
vâlve.
&
r
o
ú
z
*
o
ì
rÞq
ír,-'
7/25/2019 KOC-MP-027 part 2
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Þoc.
N0.
K0c-Mp-0?7
PÅRT
2
Fage
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64
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1
15.3.4
16.0
16_1
16.1.1
16.1 .2
16
1.3
16.2
16,2,
1
16.2.2
17.0
18.0
when
an isolation
valve
is
intended
to be used
for
such
purpose,
the
flanges
between
the isolation
valve
and
the
pressure
relief
devicå
srroulo
be
wedied
open or
a
bleed
valve
provided
so
that
an
inadvertent
leaking
through
*the
isolatior
valve
does
not damage the pressure
relíef
device.
D,OçUMENTATTON
Gs*,gra
All
correspondence,
instructions,
Data
sheets,
drawings,
calculation
or
any
other
rvritten
information
shall
be
in English
languaje.
ln
case
of
dual
langua¡¡es,
one
language
shall
be
English,
All
dimensions,
units
of
measurement, physical
constants
etc.
shall be
in
st
units,
unless
othen¡vise
specified. (pipe
sizes
shall
be
shor,vn
in inches),
ln
addition
to
hard
copies,
all
final
documents
such
as
specifications,
Data
Sheets
and
drawings
shall
be
provided
in
approved
electronic
software
formats (Latest
versions
of
Microsoft
word,
Excel,
and
AutocAD).
calculations
shafl
be
submitted
in
widely irsed
software
forms
agreed
upon
by
KOC.
DeliveJaþles
Test
Certificates
and
"as-built"
drawings
and Data
Sheets
of equipment
and its
parts,
appurtenances,
and rnaterials
as covered
by
this
Rp
shall
be
submitted
to
KOC
for
review
and
approval before
packing
and
shipment,
ïhe
ManufacturerA/endor
shall
submit
to
Koc
for
review
and
approval
the
Manufâcturer's
Record
Book (MRB)
with
all
the
test certificates,
and
equipment
Data
sheets
(with
blanks
filled
out),
for
the
equipment
and
materials
supplied
in
accordance
with this
Rp.
sPAgE
P_åRTS
$
MAt¡{rENll \rcE
pArA
The
crrntractor
or
Packager
shall
compry
with
the
requirements
of
,,Koc
Standard
for Spare
Parts and
Maintenance
Data" (KOC-G-009).
APPFNDTCES
ì
,n¡[ò0,-
7/25/2019 KOC-MP-027 part 2
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)
)
DOC.
N0.
KOC,MP-027
FÅnT
2
Page 33
of
64
RÊ\'.
T
E
*
o
ú
&
PPENDIX.l
DATA
SHEELjSPRTNG-OADED
PRESSURE
RE _tEF VALVE
(For
Adclit¡onûl
dete;t¡ls
refer
to API 520
Psrt
l)
Kuwaít
Oil
Company
shqet
Nü.
*f
ruOfE;
KOC tû
mark
/
indicat¿
items
to
be
fitled
in by
the Manufacturer/Vendor
u¿ith
an
Asterisk
('),
)
SPRING-LOADED
PRESSURE
RELIEF
VALVE
PECIFICATION SHEET
N*.
oh
Nr:.
naiq
S.eviç*d
8y
ûÊN€,RÁL 8å515 0F
SELECTTOÍ{
5. Sl i1rf¡
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lvl}*ì
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rrll I
ITi'm¡
I I
I
:{). ìl*$ili{nr seât:
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Fage
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PILOT.OP
ERATEO
PRËSSURE
RËLIEF
VALVE
SPECIFICATIC.N
SHEET
of
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tr¡f¡ce
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1 l}r.5
(lril€r).
5ð
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in
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cr l3:ri1-q:
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57
Cômçrr
ç,.1frl.illl,y'
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c
I
REV.
l
APPËNDIX.1
nÄTlr
ç.
HËÊ
T
'g)
L
nT-rìE'trf)
ATED
P
ptrqc¡
lÞË Ìrtrt
IEF V
Àr
\/tr
Kuwait Oil
Company
(For
A¿lditi<tnttl
detttits
te.f(.r
ro
API
520
part
t)
NOfE:
i(OC to mqrk/
indicate items
to
be
filled
in hy the ManufttcturerNe.ndor v,,ith
ün
Asterìsk
(')
Ø
1..iiìrrl
o
ú
t)
*
z
{Wùv'
7/25/2019 KOC-MP-027 part 2
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DOC.
fr¡0.
KOC-MP-027
FART
2
F*ge
35
of
64
REV.1
ER
o
AP
Dtx-1
Ø
SHE
TURE DIS
Kuwait Oil
Campany
(For
Additionql
det¿ils
re.fe.r
to
Af
t
SZA
pã/t
t)
RUPTURE
TISK
DEVICE
SPECIFICATION
SHEET
t
L-'l
No
Þôle
?,Èvlsed
1v
t F€Nì
FfuM$ET
$efvl{ë.
Ltnù,
Õr Eq$rit.
N0"
2
Têq Èh¡mh€f .t
Oesrçn Cilde cr
.3lr¡ndðrd
Setv
eun
5 Vessel
or
Piflrlq
l\lÅWP
Ftuid
7
Ph{d St.île
(iì¡tiðtnfl
ruplure}
I
Fluid Slðle
frellevi }J
rÕndiltons)
llëSrlrt{l
Rellev'nt¡,i:irparrty
tü
$+löhci.ìlü¡
lvʡilttl c$
Speriliç
tr,3vtty
il
VicÈosl$"
st
RnNevirq
I ¿n$.*¡¿lur*l
tìofi
pftitisitr
i$ty f
,;lülrJr
{¡i
I3
SpeüJfc
Hsi* Ratû
1{
Nûrinsl
l"lñx¡rnu¡ìt
[]Fèrð{rl:l
SrrsscurÊ
l.Jçml¡ll
il|.ü$nrjtï
t1{ *r¿tÎ}n$
Trnf¡e¡;¡fu
re
tû
PrËss{Jrg trtr¡{:luJì\)s $
{nìùll{.
tTcltù,
trulåtl'frili
t7
.tuFenr*D*serl
Seck
Frã$sure
Prèrìsüre
T$
B¡clt
Pressl$*
lnlet vilçuurn
(lor''dr
tlçn*
üt¡tlet
\rðcuum
Csn.lrtrrns
Ûls8 Lù€ëkrf upltr.fðffi
{:ìf
\¡âlve
(yësho)
?3
nËf
LoÈat$d û*t$r¡5Ìreanì
ol Våfu*
(yèglne)
tûnnêêtlong
25.
Nôrn¡oal
Prp€ Size
27 F,ânce
Face
(rnleL¿oulletl
?6
FlônQe ${í}$lårü
&
Çlrss
28
Pip;ilq
SchedulÈ
ar
Bore
Rupture ÞlsÌ( Holder
Ruptura Oisk
2g
Ho{def Tùô
NÐ
'1t.
{omrn*l
0iËk
$Re
3t.
Nanìinå{
Holdsr
Srze
.t2-
DiÈh'¡\.n{
at
tesion
lvpe
.r3
\ildl,Jgl
{Jq:r3iôÐitlût
3? lìñrldi3l DêsldnålÕr
.1f
üuäri{.irY- Rèüui{e.d
33
ûuå{rl¡n'
Redu¡r€d
'15
ïûrtül¡cfuflnfi
lq¡nqc
t.{ Haldêr ldatenâl
lrnlÊ1'
46 Sgêtifled Bd¡sl Tem$eñlurð
Holttrrf &.LìlÊ{Él lÕrrllêll âT.
$n8çrlìèd
Lk¡rst
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:lg fiå{i*å l 'in
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r
å
q¡F"e
48 $rår
Ätå.ìl€$
Sursl
PrÞscilre
AäcË Éßõrf*r
49
&trr'Ì ¡,"iårksd Ëurst Prs$lurê
JI,
$furß
å
Nuh
{y/n)
E
Àlrtl ð0 o$efåtilü ¡1ålro
3å JÊ1{kscfÈrv3 ¡vÉå/nðì SI
L{åX
FÌs\ç Re*lgt¡{nce
K
n
3g
Tüfitatü
Asw
{v/¡rl &
¡ra[
52 RrfDlule
DiÈk
ft lålénäls
4Û.
r)lher
å3
idi¡nuf;lcturef s
tJå â
NOIE; KO{
to
nwrk
/
índicate
items
to
be
filled
in by
the
fvlanufarturer¡VenCor
vvith
an
/¡sf€ris/i
l)
Ø
*
o
ú
)
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7/25/2019 KOC-MP-027 part 2
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DOC. NO.
KOC-MP-017
P.åRT
2
Fage
3ô
of 64
REV.
1
E
z
*
tY
o
ú
APPENDIX.2
PRD: INHOUSE
ION
AND MAINTENANCE
REQUIREMENTS
1.0 The
inspection and
maintenance
of
Pressure
Relieving Devices
shall
be done
in
accordance
with
API
RP 576. Clauses
described below
are
in
addition
to
API
RP
576.
20 As
a regular and
routine
maintenance,
every
PRV
should
be dismantled
and
remo'.¡ed for checking, overhaul,
maintenance,
and
resetting
at
KOC
Workshop facilities after
a
specific
period
of
time
(after
every
two
years
or
less) whether
the
PRV
are functioning
well
or not,
3.0
Failure
or
inability
of
pressure-relìeving
devices
to
function
properly
due
to
some reason when required
to
release
excess
pressure
shall
result
in the
overpressure
in
the
pressure vessels,
or
process equipments,
leading
to
catastrophic damage and
breakdown
of
that equipment
or
system on
which
they
are
installed.
4,0 Therefore
all
PRV
after
installation should be
looked
after
regularly and
kept
and rraintained in
perfect
operating condition
to
provide
safety
and
protection
to
personnel
and equipment.
5.0
Some
pressure-relieve
valves have set
pressures
that
may
exceed
their
outlet
flange
rating.
lf
isolation block valves
are installed
on the
outlet
side of
these PRV, make sure that the
block valve
on
inlet
side of
PRV
must
be
closed
fírst
before closing
the
outlet
valve.
60 The
pressure
relief
vafve
body
must
be vented
immediately after the
outlet
isolation
block
valve
is
closed,
This
prevents
high
pressures
from
the
pressure
relief valve
inlet from
possibly
over-pressuring the
pressure
relief
valve body.
7.0
Similar
precaution
must
be exercised when installìng
a blind in the
pressure
relief valve
outlet.
Maintenance
staff
should also consider
installation
of a
drain
1bÍeed
valves between
the inlet
and
outlet block
valves
and
the
pressure
relief valve.
8,0
Before disconnecting pressure-relieving devices,
the
connected piping
and
block
valves
shall be checked
to
ensure
that they
are
sufficiently
supported.
After reinstalling
pressure
relief
valves,
the related
piping
should be
checked
to ensure
that
it
is not
imposing
loads that shall cause
problems
with
the
pressure
relief
valve
body
such
as
distortion
leading to
in-service
leakage.
9.0 Some
PRV
may trap
hazardous
or
toxic
service
fluid
in bonnet cavities or
dome
cavities.
Special
cãre
and
caution
should
be taken
during
deco¡ltamination
to
minimize
exposure
of
personnel
to such
fluids.
*
qÌ,^>cv.-
7/25/2019 KOC-MP-027 part 2
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\
)
DOC.
NO.
KOC.MP.Oz?
FART
2
Fage
37
of 6{
REV.
1
ER
APPENDIX.3
PRD: TYPES. FUNCTIONAL,
CI{AFAGTERIST|CS.
åNp
USES
I
Sprinftl=qgjgd
Eressure
Retigf
Vatve
(pRV)
a)
Conrrentional
Type
for
Vapour
Service
Applications
The
conventional pressure
relief
valve
(PRV)
should
be self-actuated
spring-loaded
pressure
relief valve
which
should
be designed
to open
at a
predetermined
pressure
and
should
protect
a
vessel
or equipment
or
system
fronr
excess
pressure
by
removing
or
relieving
the fluid
from
the
vesSel,
equipment
of
System
gac
liisure-l
oJ ,4pperrtlír-4
of
this
Rt,¡.
The
conventional
PRV
are
intended
generally
for
applications
where
excessive
variabfe
or
built
up back
pressure
is
not
present
in the
system
into
which
the
valve
discharges since
the operational
characteristics
ii.e.
opening
pressure,
closing
pressure,
and
relieving
capacity)
are direcgy
affected
by changes
of the
back
pressure
on the
valve.
b) Con,rentional
Type
for
Liquid Service
Applications
The
spring-loaded
pressure
relief
valve
intended for
liquid service
does not
pop-up
in
the
same
manner
as
the
vapor
service
valve
since
the
expansive
forces
produced
by
vapor
are
not
present
in
liquid flor,v,
The
spring
loaded
PRV
intended for
liquid service as
such
relies
on
reactive
forces to
achieve
the
lift
for
release
of
liquid.
c)
Balanced
PRV
The
balanced
pressure
relief valve
should
be
designed
as
spring-loaded
pressure
relief
valve
that
should
incorporate
a bellow or
some
other
means
of balancing the
valve disc to
minimìze
the effects
of
back
pressure
on
the
performance
characteristics
of
the
vafve
lVe
ttigurc-)cn<{
Figurc--t
o./ Åp¡x:ndit-t
<tl
rhis
RP).
A
balanced
PRV
incorporates
bellows
by
means
of
which
the
effects
of
a
back
pressure
on
the
operational characteristics
i.e.
opening
pressure,
closing pressure,
and
relievíng
capacity
are either
minimized
or
precluded.
The
þellows
of a
PRV
during
operation
balances or
eliminates
the effects
of
variable
or
built
up back
pressure
that may
exist
in the
system
into
which
the PRV
discharges.
ú
*
q,ñN-
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DOc.
N0.
KOC.MF-02?
pÀRT
2
Fage
38
of
64
REV.
1
E
R
APP
DIX-3
(('ontinuerJ)
2
Pi
lot-Operated
Pressufe
Relief
Valve
The
pilot-operated
pressure
relief
valve
consists
of
the
main
valve
which
normally
encloses
a
floating
unbalanced
piston
assembly
and
an
external
pilot.
The
Pilot-operated
pRV
however
is
not
ru"o**"nded
for
use,
Also
fefer
to
ClauSe
8,1
of this
RP.
i .'or¿lctaìl.t
¡¡lpil<¡t-ottemred
Vah,e,
relùr
t<t
f:i.¿ut.t:--\
t>1.
Á
pper
dit-,1
i tl' t
h
is
lt l,
).
3
Ruotr¡re
Ðisk
{No
stng
Pressure
Relief
Dev
ice)
4
a)
'fhe
rupture
disk is
a
non-reclosing
type
of
pressr.tre
relief
device.
lt
acts
promptly
to
overpressure conditions
when installed
to
protect
pressure
vessels,
equipment
and
other
pressure
containing
systems.
(st<,[-i;¡urr,-ú,
i
:
i
"q
u r c-
/,
tt
n
I
I
:
i¡lure-
I t
¡J',4
lye
n
d ix
-.1
ö
/'
t
h
i.s
R
p
).
b) The
rupture
disk
alone
shall
not be used.
However
if required
may
be
used
in
combination
with
pRV
(See
Clause
10.2
of
this Rp),
PRvl
TåELF
FoR-S-ElEcÏoN
oF
oRtFtcE
StzE
TABL.E-1:
Standa
rd
Effective
e
Areas
) and
Pesiqnatiqq-L,etter
Sr,
No.
ÐESIGNATION
LETTER
EFFECTIVE
CIRIFICE
AREA
{ln'.}
1
D
0.1 10
?
Ë
0,1
96
3
F
0,307
0.503
G
tl
LI
tt
û.785
J
1.2*7
1,838
K
I
L
2.8S3
ü
M
3.Ðt
1ü
N
P
4.34
11
6.38
';
a
11.0s
1ô.00
26.ût
r'l
R
14
T
w
z
*
o
t-
qaN-
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--tÞ
t
DCIC"
NO. KÖC-MF.Oz? PART
2
Page
39 of 64
REV.
T
R
@
*
,r
o
o
ú
z
APPENDIX.4
PRD:
TYPES.
DEStGfrlåND GENFRAL DETAtLS
c{F
Sl'lrn
t$nl¡ìdl,rl
Àþr åï¡
strtr
ßnÌl*l
Sprh{
liûl¡¡ìg
6uil${s
&lþrr{ü{
ntrg
tÀn*
NËd{¡
Figure-1
ttsc
Vüìrt
it¡l${iiidi
Conventionål
Pressure
Relíef
Valve
with a
Single
,Adjusting
Ring
for
Blowdown
Control
4õ
\
v
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-->
t
DOC.
t{O.
KOC-lrlP-0?7
PART
f
Page
40
of
64
REV. 1
z
w
r
o
ú
o
*
APPENDIX-4
({.)r¡tttinuul}
via,
Sù¡rn
isp'þxld¡)
.{r¡,ã ng tcri¡rd
ÈroflnAl
1ÌÞ{llr{¡
üsIarw
OÈl(
ulin{
sutlce
ÁìrIraìnÈ *r.l
Ëody
¡&fi[r
PRD:
TYPES..
ÞESIGN
AND
GENERAL DETAILS
Vçfi
tuu*lg rr:få
rdm
f:igure-2:
Balanced-Bellows
Pressure
Relief
Valve
4ñ
\
t\¿-
7/25/2019 KOC-MP-027 part 2
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APPENDIX-4
{Coutint¡,-
'd)
PRÐ:
TYPES. DESIGN
AND
GENERAL
DETAILS
ü'r$
slùn
{5F¡a¡t*l
,il1¡.1* t¡¡
r,:
lYs
¿ì.sfllt
3ç{}Tt
Fù Íìa("t
gr{ilK
rHd
tlf¡1f.{rgtsJ}
{ìcs:rë
p:tìi
ì"tì'ûll
lulIlf
?t¿j;urltìg tJ¡çl
Brdy
Jt*¿f+È
Figure-3:
Balanced-Bellows
Pressure
Relief Valve
with
an
Auxiliary
Balanced
Piston
--->
t
Þoc.
N0.
Koc-FJtP4e7
PART
2
Page
41 of64
REV.'
E
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ô
*
o
ú
q'òÕ''
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nÐG.
Flô.
K0c-tirlP-O2?
PART
g
Fage
42
of 6,f FIFV.
T
E
.*
APPENDIX-4
(''
ctnt itruat 1
PRD:
TYPES,
QESIGN
AND
GENERAL DËJAILS
çtp
:ilü\
iTi".v$È
i{tìjJ¡il
11{¡ 1{JèiT
â(s *i
lì3ir$
ßts¡r
*eùlsl :s$"ìr:q
ll;3d
ilqli:
Figure-4:
Conventional
Pressure
Relief
Valve with
Threaded
Connections
@
)
<)
*
o
t-
fi'Ùa--
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)
)
ÐOC.
NO.
KOC-fi{P42? PART
2
Page
43 af
64
xËv.
{
APPEND¡X4
('uttittucd)
PRD:
TYPFS, DESIGN
AND GENERAL
DETAILS
sd
5{
¡r¡r$*s
tfi ¡ln|ëd
ffs*
S6$rþ
E¡tcrr$f ùþô¡tù*n
â4lålflx,rt
Êl(
sçfrf
$t¡â
Flü r*r*g
Ftd
iùtr¡ljs
/-
(TJûrdSüì
/ IÞ1
v
{Mrd
Êlm
5*ðt
Irfçrul
p¡¡¡r¡r
ff;r.$
bþr
fI+rll*4
Figure-5:
Pop-Action
Pilot-Operated
Valve
(Flowíng-Type)
.l{
,f
o
ú
@
z
a/
*
[u--
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)
Ð0C"
f.¡O.
KOC-MPdtf
PART 2
Pnge
44
cf
S4
REV.
f
4PPENDIX-4
(C
otttínuert)
CORR€CT
INSTALLANON
$rìÐñ{ìðfs
r
lki$
;¡.1¡I
¡Hr[ç
¡lriS.rlùt"*
üT5k
þ're.oess{nt\ll
{*
¿iU¡ä
iT
l>r8-¡l$è$ìrlty
sdf$lt
s
lrì:{rt-l}.?c
n4]lüù
tlsi(
fì.J{û f
lir{dl
ùrhJ ûi.jlt*f
$û¡*f,ì
liìrlÊô
ifql
+
lÏ.,
Figure-6:
Forward
Acting
Solid
Metal
Rupture
Disk
v
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b4
Þoc.
ñ¡Õ"
K0C-MP4?7
FART 2
Page
45
of
64
REV.
l
APPEN
DlX-4
((;
rrtr
i
nt rad)
PRD: TYPES.
DESIGN AND
GENERAL DETAILS
CORRECl INSTALLAÎIQN
3¡ni l}{{ñ dltk*t
*r'rù
rìù,hì
Êüpll,fr
ËiÈ
ðsrs¡ëtj"ì- 5¡lþ
ðl¡S6
*f
l¡.f
È
".*ser¡{ìtt
tcJ
òn$
rr5{¡ ìYÞÈ
nrFaL&r
ú$g l¡:.'&ftt
{inÞî
itût *{IilÈl ¡Írüñ*r"i
+
Figure-7:
Fon¡rard
Acting
Scored
Rupture
Disk
E
-------
tf"¿
@
t
o
ú
)
)
)
ø
v
7/25/2019 KOC-MP-027 part 2
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DOC.
NO,
KOC,MP-027 PART 2
Page
46 of
64
RËV.1
APPENDIX.4
((.-ontin
ue d)
PRD:
TYPES.
DESIGN
AND
GENFRAL
PETAILS
Prqåturd
g¡r:{
t¡|re
ËdFtr¡{E
d¡s.k de'¡ise
Fr.:'*srelrlr'¡
sr*e har¡ *u¡qhe':{
w¡lh
l{f
ljeri
ûi
¡re
*rlciu$'
rûì
vsût
A
tr
Fígure-8: Rupture
Disk in Combination
w¡th
a
Pressure
Relief Valve
/-,.É-+\r
/
0
0
0
ü0
o
t-
*
¿l^a
N-.
7/25/2019 KOC-MP-027 part 2
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V*ssel
DOC.
N0.
KCIC-tutF-027
PåRT
2
Page
47
of
64
RËV.
{
APPENDIX..S
PRD: TYPI
CAL
INSTALL.ATION
NT' PIPING
Pre¡íù{¡Ts
rrli*f
velve
nÕdrr¡ Grðt¡:ì
{sea
Fl{]tr
l}
L${rJrl:tfl1dl.lin
1sr*e
Finte
2)
lVurìlre
r
r;üp
lìì¡ì\¿
ix,
rs{iüfed
LünS
rñ¿jrus
*tr{:,w
::uÈË¡üfì
la
rr. risl
v.,erçhl
ùrri.J
ï* 1ülÌr¡¡¡
lsTc$iì
-
Nruxin*l
nne
t'rn¡n*ler
ã
n$
le.Ëg
ln¡¡ì
vðÞ\t
irìlel
ñritï
N(}il-raßìv$iÀbls
ËrÊÉ$lJrè
lilssÈ.å rì{'il
nkrff:¡ Ti¡}¡r
$
fr*{c$r'rt
ûf
Í)rsr*$,ns
t$ü${
ïals€
*l
Fê.$suI€
Notes:
1
.
For
details
refer to
Clause
10.8
of
this RP for
valve body drain.
2.
Ïhe
low point
drain
should lre
oriented
away
from
PRV, the
structure,
ând operating
area
l=igure-f
Typical
Pressure-Relief Valve
lnstallation:
Atmospheric
(Open)
Discharge
1PC\.
7/25/2019 KOC-MP-027 part 2
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APPENDIX-5
(Conlinued)
To
dorad
*ymenr
{:{dnunir$l
PID:
TYPICAL
11:¡SIAI.L ATIOIr¡
AND
ptptN.€
$rñ'sÉ
vtrrl¡r¿F¡Ð
t¡r
Þ&*Qgapr*um
ltlidrañn,
if
tae¡&rrd
i$ô*$þþ¡
Ëkllgd*Hl
*i'LÊ,
itrüqFriñd
roð¡tvflnFmv
Tdt¡år{a
N*rfi*
¡lpmdunrt*r
ns
tættãürûJs*
iÂlÌ$t*e
Vùssel
,)
FOt. NÕ.
K$r{utp-02?
påRT
r
Fage
4û
oft4
REV
I
For
technical
requirements
of bonnet vent
piping
sêe
Clause 10.9 of this
RP
Figure-2: Typical
Pressure-Relíef
Valve
lnstallation
Closed
System
Discharge
I
7/25/2019 KOC-MP-027 part 2
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.l
APFENDIX-g
(Continuect)
tlupþre
ñ
dâr,{c€
PRD;
TYPICAI
INSTAI-LAT|9N
A{p
ptptNG
l{dr¡sr
Rüt}l ru
d¡ü*
('
,)
tl€srd
Ðoc.
No.
KôC-fi¡tP.t2T
pART
2
Fage
49
of
64
REV,
I
Figure'3:
Typical
Rupture
Disk Device
lnstallation:
Atmospheric
(Open)
Discharge
\
7/25/2019 KOC-MP-027 part 2
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I
)
00c.
lto.
Koc-tr{p-02?
FåRT2
Fage
50
of 6rf
REV.
{
APPENDIX.-5
(Contirtued)
Pr${*r. .¡Oa¡s
lis*rhl
þd.
tr(*ä,
rttcr soürÉ
NOTE;
For
details
see
Clause
10.G.2
of this
Rp
Figure-4:
Typical
Pressure-Relief
valve
Mounted on
process
Line
Yô*d
\
,
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APPENSIX-5
(Continued)
ù.hå'l 'f, ,ç
PRD: TYPIC3L INSTALLATION
AND PIPING
Pl:it
hìlü¡å¡
lrrú.rrrÞ
rtûÉr{
/')
=ìt
t\tstùl rs{*$l{}
¡¡tg¡rrr
ld 9iç
DOC. NO"
KSC"MP&zT
PART
2
Page
Sl
o{
6¡l
RËV.1
Vesssl
Figure-5:
Typical Pilot-Operated
Pressure-Relief
Valve
lnstallation
U
7/25/2019 KOC-MP-027 part 2
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I
r¡oc.
Ho.
Koc-Mp427
PART
2
Page
52
of
64
REV.
.t
APPENDfX-5
(Continued)
F
is{
}.}ô{o
It
^
(rËë
Nðt.j
?t
Lúrrr
ñrrtrilâ
È&lN*
':.ì¡rW
trf,
rb*trt
wr\¡t{
ô.{
afle;lù}fi tf¡-:Èf
l$'ir¡
t'¡{srt
' ¡
NOTES:
1)
The support
should
be
located
as close
as
possible
to the
centreline
of
¡re vent
pipe.
2)
F=Reaction
Force:
A=
Cross-SectionalArea.
(Fordetails
see
Clauses
10.7.10
and
10.7.11 of
this
RP)
Figure-6:
Typical
Pressure-Relief
Vatve
lnstallation
with
Vent
pipe
7/25/2019 KOC-MP-027 part 2
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)
noc.
No.
KOC-Mp-027
PART
?
Page
53
of 64
ËEV,
I
z
APPENDIX'S
(Continued)
PRD:
TYP
ICAL
NAN
D PIPING
i::¡i
çt.uçru
låtmt
[Ji*c$t¡¡rl;s
Þ¡uing
I
f
ræ v{¡ll u.
I
tðtfiål€
an{:tmútt*
l:ìi.4)l¡Jr
r] ¡Ji.5k'
dß¡6S
{S8*
l'.lùtq l'
f?f*çÊurs
¡{:3€
rüÊ
mNÐ
thìlÕ
fi
i*¡{ûf{l
*1
tlrÊóil¡r*
{.}li*t
villve
fr{}t
ll
ì}1i$r}r
t
NOTES:
1) The
lnstallation
of
rupture
disk
device
in conrbination
with
PRV
(Also
see
Figure-B
of
Appendix-4 of th¡s
RP)
2) The
space
between
the rupture
disk
and
PRV
must
be
vented
or
provided
v¡ith
a
suitable
Telltale
inCicator.
See
Clauses
10.5.2
and
10,S.3
of
this
Rp.
Figure-7:
Typical
Rupture Disk
Device in
combination
with
Relief
Vatve:
lnlet
Side
lnstallation
*
, l;'.,r
,)
ry,Dv
7/25/2019 KOC-MP-027 part 2
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APPENDIX-5
(Cantinued)
PRD:
TYPIÇAL
INÇTALLåTION
AND
PIPING
Í¡ruæ}{lrs
valv*
Avcrúd
p¡x*¡qc
}ltsrsþ
{ree
n¡*}
T
Note:
the
joining
of
process
lateral to inlet
piping
should be
avoided
(See
Clause
10.6.8
of this RP)
rS¡çl
t)-
000. N0.
Koc-i¡F-0zr
pA,RT
2 Page 54 of ð4
REV T
Figure-8:
Pressure-Relief
Valve
lnlet
Piping
VËßËI
U
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a'
DOC"
N{r.
KOC{Utp{¡?
pART
2
Page
üð
of64
REV"
1
APPENDIX-5
(Continued)
h{¡tt*,rì
1ilÈaa
*{t
sçd*tll
fxr
mr
ff*r¡r*r **lrg<ç*t
(rtt
¡0eJil6
þr åUiO*ùÇrJ*
dhrtr*¡$l..
*t¡do
l¡
É¡Ôlürat
liarft
rwlr?rd{
Fr¡a{¡r
T drqrtö*
t& öl{}pa
t**a, Сrre
la*
låGr¡àfr
7l
Ts
ü¡ÐrliûFü
er
nÈlwñütr&tÈt
SllÈ¡øl v¡¡tm
lr¡¡l¡l *n
wlÐ
Sodf
{.i
¡lk$ô
3l
8 È.id
i.{trr
r*'
&1ttr
Þ6¡¡ë,r
0f
þclinü rptt
Ë¡
tar.T6¡ra
'.tnryir$
lFêrÌ
f¡þ¡¡o.
tt
r*4fÀal
ie dütr
strFlV
Notes:
1) lsolation
valve
need not
be
necessary on
piping
intended for atmospheric venting /
discl':arge.
)
2)
A
bleed
valve
should
be
provided
at the lowest
point
on
the valve
or
otherwise
on
the
pipe
spool to
help
drain the
condensatelliquid.
3) For
details
refer
to
Clause
11.a
(g)
of
this RP.
Figure-9:
Typical
Pressure-Relief
Device
lnstaflation
with
an lsolation
Valve
\
a
7/25/2019 KOC-MP-027 part 2
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APPEND¡X-5
(Continued)
{i¡d* ì¡t
edvnrs
ßqûüßjì
ft
dei$¡0¡
riôù¡'t
ô¡rìIì
tl{WVðìlç
t3.Dtu* S¡Sü
{l}r
.rHd
ûtù)
s
¡krdäÍ
irì tg
'fwåt
t¡+q.¡
råù\*
vråså{L
Figure-10:
Typical
Arrangement:
Twin
pressure-Rerief
Þevices
Each
100
%
Spare
Relieving
Capacity
<t
Ðoc.
No.
KOC-MP427
PART
2
P*ge
56
of
t4
REV.
{
ïi
1øu
7/25/2019 KOC-MP-027 part 2
http://slidepdf.com/reader/full/koc-mp-027-part-2 57/64
APPENDIL-g
gontinued)
PRD:
TYPICAL
lNsfALLATtoN
ANp
.plptNg
It)
di*í
i&gnå*l
v{ù*yr
dl¡{Rl;
Èel*¡fiffi
å:{h$ c
{}i€rl
f
, *}Ùt
rff.lh¡ûl
î¿lÀ€
*{¡fgwtfrçü
ç*¡¡fç
a{
¡qÈsg
ûÉsì
l$É
¡k :lir ßt
h*c.'r¡.wc¡l*r
rÈrt¡i
h-,{å
*?
*¿¿ç
llwl
:
þlrrÈÁ
.l
.*"{
ffiG
Notej
For
details
on
lsolation
Valve
and
Car-Seal
refer
to
Clause
'1
1.0 of
this
RP
Figure-î1: TypicalArrangement:
Twin
Pressure
Relief
Valves
lnstalled
with
lsolation
Valves.
Each Pressure-Relief
Valve
lnstalled
has 100%
Spare Relieving
Capacity
It6lêr¡
þiñJ
s¡l$E
T¡t*o¡.
lì¡Èxt
ralr
,r
)
Q---
BûC.
þ¡O.
K0C-MF-027
PART
2
Page 57
of
64
REV. {
vfrËLt
il
it
ER
4,,O
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DOC.
t{t.
KÖc-mP{r2?
FåRT
2
Page
$t
of04
RËV.
{
APPENDIX-g
(Contínued)
Iûrtil*Rdåt¡ftì
raå¡fif
yrqsì**t
or
* n6(r.'herfë
dldreegp*yû¿ãilt
lcrçwwrnbt
¡rrxrcl6eo*rxt
nur
¡lryl
3
plrarrrl
ùI *t
FarrÍÍ6
l1¡¡cd
hhcdv*l,r*
Fqrüi Ç
lï{oaû¡rårl
Õf
r¡rûìa röfrvirì0
dçsìnË
Vnsrc¡l
Figure-12:
Alternate
Arrangement:
Tw¡n
pressure-Relief
valves
lnstalled
with Each
100
%
$pare
Relieving
Capacity
E
Cç--
7/25/2019 KOC-MP-027 part 2
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DÐC.
NO.
KOC.MP{I27
PART 2
Page
59
of
64
REV.
T
'*
z
o
,aY
E
*
F¡ç¡r¡nfl
lÞs*r $
flÈiål¡-et
iJ$ÈrélÀ
APPENDIX-5
(Continued)
Èe;ery krË
,te¡*¡te
lìt*el
Tave
fsidam*
FRP:
IYPICSL
lNSTALL4TIoN
ANp
ptptNc
ðlq¡x:ixr¡itS¡ry
[
h.aw
Hrxtr.$¡*
fi
itrxx*¿ l*l
r¿*tl
I
fþ&J*r
{ç¡dl
d{eìni.çj
llw c$*
rs¡+{lJ
l'¿l¡*
XX
,î .Å-f -
I*þ
7
Ä
l\
Note:
For
requiremeets
of lsolation
Valve,
refer
to
Clause
11
0 of
this
RP
Figure-13:
TypicalAssembly
of
Flare
Header
Showing
PRV
and Block Valves
0t-
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ÐOC, l,l0.
KÕC{iP. Z7 PART I
Pago
60
of64
REV, I
APPEND¡X-5
(Continued)
flmÇüs
¡¡u¡ûñ
düçrxs*
PRD: TYPICAL
INSTALLATION
AND
PIPINF
k*ûñþhd.
vdfü
tb0r*or*sn*drc
Pncü
uritþv
ladÉr
*wwt
fr¡úar
ürÇgr¡
tu@ ..ürÉ*S
T*d%
Figure-14:
Typical
Arrangement
PRV
and
lsolation
Block
Valves
lnstalled
on
a
Gompressor
Unit
lsðNicr¡bpûs
t
å ¡
r/
\)
7/25/2019 KOC-MP-027 part 2
http://slidepdf.com/reader/full/koc-mp-027-part-2 61/64
J
)
Ðoc.
No.
Koc-MP-oz?
FART
2
Fage
6{
ofß4
REV.
.|
APPENDIX-5
(Continued)
PRD:
-TYPICAL
f
N$TALLåTION
AND
PlPll.¡
Ç
lnlet flenge
lr*sl
$ps
Rotuded entry
ka¡ch ffinnsc¡&m
D
(see
Nole)
Nole:
The
distance
D
should
not
be
less
than
10 times
the
pipe
diameter
frorn
the
device
or
any
equipment
installed
on
the
system that
causes unstable
flow.
Figure-f 5:
Typical
lnstallation
Avoiding
Unstable
Flow
Patterns
at
Fressure-Relief
Valve
lnlet
Flovr
.+
Run
pipe
7/25/2019 KOC-MP-027 part 2
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q
DOC.
HO,
KOC{/|P4â7
FART
2
Page
62 of fi4
REV.
I
APPENDIX.S
(Cantinued)
PRD:
TYPICAL
INSTALLATION
AND
PIPING
,a;lftl,sr€ l
r,¡Jge
niï.SSll,ül,fû
ìfl
'{ìp€r¡'ps**n
ål](
{Ì lðtl
}srlsflk{y
FiüU
Shsn
ntFË{*
In
ûl+*r wn
htåd{r
->
S+o* r tr*s sùn¡ld hr{€
it
¡irfl
.¡rea
,ï¡ú
br
ä1 lÈð tÌlls
s¡* of ¡r
fii*t
md
nfl*l
of
ïrÈ ttltl FEIÈe
i.'ü 3,e t¡.,llvË
lñ
.{.€rf
s¡{í*n
Note:
For requirements
of
lsolation
Valve and Car-Seal,
refer
to Clause
11.0
of this
RP
Figure-16:
Typical Arrangement
Showing
Block
Valves
in
Open
Position
with
Car-Seal
lnstalled
on the
lnlet
and
Outlet
of the
PRV.
a
a
Vssseì
E.R
o
t
z
*
)
)
(n
N-'
7/25/2019 KOC-MP-027 part 2
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Paga 63
of
64
REV,
f
OC.
NO.
KOC-1tilp427 FART
2
E
ACKI¡OWLEDGEMENT
This Recommended
Practice
has been
approved
by
the
Standards
Technical
Committee
(STC)
consistin3
of
the
following:
Mr.
AJRedha
A.l-Haddad
Mr. Mohammad
Emam
Mr.
S.
Kumar
Mr. Henry
Hill
Mrs.
Amina
Rajab
Mr.
Khalaf
Hamada
Mr.
N.
Ramanathan
Mr.
Khalid Al-Ahmad
Mr.
Daniel Pino
Mr.
Ali
Hassan
Al-Failakawi
Dr,
Modistaba
Araghi
Mr. AbdulAziz
Akbar
Mr. Moataz
Khalaf
Standards
Team
lnsp.
Corr.
Team
(S E)
Standards Team
Opns,
Tech. Svcs.
ïeam
(SK)
Design
Team
Design
Team
Major Projects-EFP
Team
Gen.
Projects
Team
Utilities
TeamHSES Team
lnsp.
Corr.
Team
(N W)
Project
Mgmt,
Team
(NK)
lnformation
System
Team
Chairman
Deputy
Chairman
Secretary/
Member
Member
Member
Member
Member
Member
MemberMember
Mernber
Member
Member
The
draft
of
this
RP had
been circulated to
the
KOC
User
Teams for
review
and
the
responses
were
received
from
the
following:
ENGTNEERTNG
çRgUl
hlsE-GRouP
Team
Leader
Design
Team Leader
HSE
Systems
AHMADISERVICåS__ç-ROUP
EXPO,BT
MARINE
OPNS.
çROUP
Team Leader
ljtilities
Team
Leader
Export
Services
OPERATION
GROUP fSK)
MAJOR
PROJECTS
GROUP
Team
Leader
OPns.
Tech.
Svcs
Team
Leader
Prod.
OPns
oPERAÏoNs
GRquP
0{u-[)
Team
LeaderOPns.
Tech.
Svcs
Team
Leader Project
SuPPort
Team
Leader
Ëxp. Fac.
Proi.
DRILL¡
OPERATIONS
GROUP
Team
Leader
Drilling
Services
INDUS
IAL SERVICES
GROUP
ptvlDED
zoNE
GROUP
Team
Leader
lnsp.
corr.
(N
WK)
Team
Leader
Proj,
Engg.
Facilities
@
z
*
o
ú
¡j
ôÐ0---
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DOC,
NO. KOC-[JIP-027 PART 2
P¡ge
64
of
04
REV.
1
This
KOC
Recommended
Practice for
Pressure
Relief
Devices:
Design
and
Materials
{KOC-MP-027 Part 2,
Rev.l}
has
been prepared
by
the Task Force
(TF-MP/O7)
comprising
of
the
following:
Mr. Mirza Mohsirr
Mr.
Raj
Maharaj
Mr.
Adnan
Bohammed
Mr.
Yousef M. Zaman
Mr.
Nawaf Al-Shehab
Mr.
Mohammed
Al-Ajmi
Standards
Team
Major
Projects
Team
Design
Team
Opns.
Tech.
Svcs.
(SK)
Opns.
Tech.
Svcs,
(NK)
Opns
ïech.
Svcs,
(WK)
TF
Leader &
Author
Member
Member
Member
Member
Member
Ex:61371
Ex:
66975
Ex:61815
Ex'.22241
Ëx:
23437
Ex: 20336
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