hydraulic calculation guidelines_parson

7/31/2019 Hydraulic Calculation Guidelines_Parson

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Maximum

velocity

Maximum

pressuredrop

m/s (kg/cm2

)/100m

1 Gravity line 0.05

Pump suction

T 30 C below Tb 1.0 (umin solids) 0.05

T > 30 C below Tb 0.08 Beware of viscosity change

3 Pump discharge 3.5 1.2

Cooling water (m3

/hr)

0 150 0.3

150 650 2.5

650 1600 3.0

> 1600 3.5

Column feed

Pump discharge 2.5

Non pump discharge Liquid = 2.5

Vap = 122/(V)0.5

0.45

Column overhead vapor

General 122/(V)0.5

0.06*P0.5 P = abs. pre. at overhead receiver

Low pressure column 122/(V)0.5

0.03*P0.5

Column top cond. rundown

General 1.0 (Total

condensing)

0.12*P0.5 P = abs. pre. at overhead receiver

Low pressure column 0.06*P0.5

7 Reboiler inlet 0.00009(L V)

0.014

kettle or thrmosiphon

Reboiler return

Kettle 0.05

Thermosiphon 0.00009(L V)

0.004

Fuel oil to heaters (m3

/hr)

0 1.5 1"

1.5 5.0 1.5"5.0 8.0 2"

8.0 23.0 3"

> 23.0 4"

6.1

6.2

HydraulicsGuideline - Parsons(MKSUnits)

Viscosity of about 50 cS; flowing

gravity of 90; oil recirculation about

three times the consumption rate

Do not size for > 750 mm. If reqd, split

the flow & size dual return lines;

Avoid slug flow by allowing more p

in line or increasing vapor

Sr.

No.

Detail Remark

2

4

5

8

9

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Maximum

velocity

Maximum

pressuredrop

m/s (kg/cm2

)/100m

HydraulicsGuideline - Parsons(MKSUnits)

Sr.

No.

Detail Remark

Saturated steam (kg/cm2

g)

1.0 30 0.08

1.0 & more pavailable 50 > 0.08

1.0 17.0 50 0.043 P

> 17.0 50 0.066P

10.2 Superheated steam (>14.0

kg/cm2

g)

75 0.04 P

Condensate

Upstream of CV or trap 1.0

Downstream of CV or trap Pf 70.0 30 0.0066P

Compressor 0.07 and 0.037*P0.5 P = abs. suction or discharge pre.

Centrifugal suction 36 / (V)0.25

Centrifugal discharge 122 / (V)0.5

Reciprocating suction 10*(28.84/M)^0.5 M = molecular weight

Reciprocating discharge 15*(28.84/M)^0.5

Fuel gas to heaters

Upstream of CV 0.164 P P = pressure before CV

Downstream of CV 0.33 P P = pressure after CV

Fuel gas header 0.164 P P = pressure in the header

Lines with high pavailable

Liquid 3.5 1.6

Vapor 122/()0.5 1.6

Two phase 1.15

15

Not to flare headers

12

13

10.1

14

11

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Maximum

velocity

Maximum

pressuredrop

ft/s psi/100ft

HydraulicsGuideline - Parsons(FPSUnits)

Sr.

No.

Detail Remark

Saturated steam (psig)

15 100 1.1

15 & more pavailable 170 > 1.1

15 250 170 0.013 P

> 250 170 0.02P

10.2 Superheated steam (>200

psig)

250 0.012 P

Condensate

Upstream of CV or trap 3.0

Downstream of CV or trap Pf 1000 100 0.002P

Compressor 1.0 and 0.043*P0.5 P = abs. suction or discharge pre.

Centrifugal suction 59 / (V)0.25

Centrifugal discharge 100 / (V)0.5

Reciprocating suction 33*(28.84/M)^0.5 M = molecular weight

Reciprocating discharge50*(28.84/M)^

0.5

Fuel gas to heaters

Upstream of CV 0.05 P P = pressure before CV

Downstream of CV 0.1 P P = pressure after CV

Fuel gas header 0.05 P P = pressure in the header

Lines with high pavailable

Liquid 11.7 7.0

Vapor 100/()0.5 7.0

Two phase 5.0

Not to flare headers

10.1

11

12

13

14

15

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hydraulic calculation guidelines_parson

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