00 common standards

7/30/2019 00 Common Standards

1/21

00. Common Standards00. Common Standards

. Scope and Application of Inspection Standards ........................................1

. Considerations in Inspection .................................................................... 3

. General ....................................................................................................4

1. Equipment Inspection Code and General Standards ...........................4

2. Scope and Reference per Code ..........................................................5

3. Symbol of Each Inspection Item ........................................................14

4. Inspection Item for Each of the Regulatory Facilities .........................15

5. Common Standards for Inspection ....................................................18

6. Related Codes (legend) .....................................................................20

PS-N-05-00


2/21

. Scope and Application of Inspection Standards. Scope and Application of Inspection Standards

1. Scope

Used as the standard applicable to the inspection of facilities and equipment ordered and purchased by

POSCO

2. ApplicationA. In principle, refer to this Inspection Standard.

B. Any and all contracted specifications, approved drawings, or comments shall have precedence in case

they have any discrepancy with this Inspection Standard.

C. Notwithstanding the provisions of this Inspection Standard, the legal inspection items provided by

suppliers shall be inspected by the relevant authorities. When carrying in tested equipment, suppliers

shall submit related documents and test reports to the authorities.

D. Test reports on the inspection items specified in this Inspection Standard shall be submitted by and

accepted from suppliers.

E. All suppliers including those whose equipment have been tested by POSCO shall have the

responsibility for ensuring the quality of the equipment and extend their cooperation during POSCOs

inspection (or test/inspection commissioned by POSCO) at the manufacturing sites.

3. Inspection Procedures

A. As per the approved inspection standard, suppliers shall conduct their own preliminary inspection and

make the necessary preparations before requesting POSCO for an inspection.

B. When requesting POSCO for an inspection, suppliers shall submit to POSCO a written application for

inspection specifying the test date, place, and test objects and items.

C. POSCO may conduct witness inspection together with the supplier on the following test objects and

items (note, however, that said inspection shall be discussed and notified prior to the start of

manufacture of each of the facilities):

[List of test objects subject to witness inspection]Equipment

NameTest Item Test Name Reasons

Hook PF Proof test

- Commissioning companies with appropriatetesting facilities to conduct test

- Potential damage to product in case of repeatedoverload test

Tank,Pressure vessel

LK Full water test

- Large-volume vessel requiring excessive volume

of water and posing potential risk of freeze burstonce it is filled up

PR Pressure test- High-pressure test taking too much pressurization

time and posing potential risk of keeping pressurehigh

Weldedstructure

SPPre-painting surfacetreatment test

- Retreatment required after at least 4 hours withno measures taken following surface treatment

PA, WA Assembly test- Process delayed due to unavailability of lab

(waiting for inspection)Reducer or itsequivalent

PA, PF, BL,NV

Assembly andperformance test

- Too much time spent in waiting for inspection

Air conditioner PF

Cooling capacity test

(air con. capacity of10RT or higher)

- Difficulties in installing in test room, piping work,etc. (too much time spent)

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3/21

Transformer PFImpulse test(impulse voltagestrength test)

- Deteriorating insulation with repeated tests

Motor,Transformer,Generator,Power supply

PF Temperature rise test- Too much time spent in inspection (average of

5~6 hours)

EquipmentName

Test Item Test Name Reasons

Common

MAPerception of testspecimen, physicalproperty test

- Machining test specimens taking too much timeand incurring excessive costs

DM(machining)

Machining dimensiontest for largemachined

equipments

- Considerable time spent in setting during theprecision dimension test involving large targetobjects (steel-fabricated apparatus or casting,etc.); no work requiring the machining equipmentallowed pending the completion of witness

inspection (usually, inspection is conducted on therelevant machines upon machining work)

NT(RT, MT, UT,

PT)

In-house/Externalnon-destructiveinspection

- Inspection taking too much time and incurringexcessive costs

PK Packaging test - Preventing any delay in the release schedule

Rejecteditem

Retest- Correction and confirmation for objects deemed

unacceptable

4. Major Points to be Considered for Quality Control Prior to Manufacture

In case of detailed specifications and drawings are approved, the following should be considered carefully

since they may affect product quality:

A. Vibration and noise generated by the rotating machine (fan, blower, pump, compressor, reducer, motor,

etc.)

B. Non-destruction (RT, UT, MT, PT) and heat treatment of welded structures (crane, vessels, noxious gas

duct, transfer car, ladle, major welded structures, etc.)

C. Painting specifications (surface treatment grade, paints, number of painting, paint thickness, etc.)D. Welding methods (welding type , shop welding, scope of

installation welding work, etc.)

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4/21

. Considerations in Inspection. Considerations in Inspection

This Inspection Standard includes inspection standards, items, tact, and methods

applicable to manufacture. The followings are the major considerations in inspection:

1. General

- Reference for vibration, noise, temperature rise, centering, and dimension

- Symbol of inspection item (material, non-destruction, exterior view, dimension, assembly, performance,

painting, packaging, etc.)

- Inspection item for each of the facilities required by regulation

- Common standards for inspection

- Related codes (Legend)

2. Object-specific Inspection Standards

Mechanical equipments (41) Electrical equipments (13) Common equipments (7)

1)Crane (including Tong,

Magnet)

2)Hoist

3)Pump

4)Compressor

5)Fan & Blower

6)Valve7)Expansion Joint

8)Agitator

9)Belt Conveyor

(including Roller and Pulley)

10)Heat Exchanger

11)Pressure Vessel

12)Dust collector

13)Water Treatment

14)Cooling Tower

15)Reducer

16)Welded Structure

17)Cylinder

18)Transfer car (Ladle Car)

19)Traveling Ass'y

20)Lining

(for Tank and Rubber Roll)

21)BF Top

22)BF Proper

23)Hot Stove

24)Stave Cooler

25)Stacker & Reclaimer

26)Sintering M/C

27)Sintering M/C

Cooler

28)Converter

29)Casting Bow

30)Mold

31)Segment32)Ladle Turret

33)Torpedo Ladle Car

34)Hot Rolling Mill

35)Roller table & Roll

Assy

36)Cold-colled Shear

37)Down Coiler

38)Side Trimmer

39)Tension Reel &

Payoff Reel

40)Bridge Type Crane

(BTC)

41)Bucket Elevator-

type Continuous

Unloader

1)Transformer

2)Power Distribution

Facility

3)Panel

4)Motor

5)Generator

6)Elevator7)Air Conditioner

8)Communication

Devices

9)Cable

10)Cable Reel

11)Brake

12)Insulated trolley

equipment

13)Resistor

1)Painting, Packaging

2)Non-destruction

3)Balancing

4)Hard Facing

5)Coupling

6)Universal Joint

7)Reinforced Plastic(FRP)

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5/21

. General. General

1. Equipment Inspection Code and General Standards

No. Test Type CODE Applied Codes and Scope Remarks

1 Vibration - ISO10816-1

:1995 (E)

- KS B 6301

- KS B 6311

- ISO10816-1:1995 (E): All objects graded

B or higher

- Apply after

additionalapproval, in

special cases

2 Noise - IEC34-9(1990)

- NEMA-MGI-12.49

- KS B 6301

- KS B 6311

- IEC34-9(1990): All objects specified in

Table or Table

- Apply after

additional

approval, in

special cases

3 Temperature

Rise

- KS B 6301

- NEMA-MGI-12.42

- KS B 6301: Bearing section

- NEMA-MGI-12.42: Motor section

- Apply after

additionalapproval, in

special cases4 Centering - KS B 1551

- KS B 1552

- KS B 1553

- KS B 1554

- KS B 1557

- Flange-type, fixed shaft joint: KS B 1551

- Flange-type, flexible shaft joint: KS B 1552

- Gear-type shaft joint: KS B 1553

- Universal ball joint: KS B 1554

- Grid-type, flexible shaft joint: KS B 1557

5 Dimension - DIN8570 PART1

- DIN8570 PART3- DIN7168 PART1

- DIN7168 PART2

- JIS B 0405

- FEM SEC.1

- AWS D1.1

- POSCO SZ-5

- ASME SEC.

DIV.I

- Steel-fabricated apparatus for welded

structures: DIN8570 PART1, 3

- Machined parts: DIN7168 PART1, 2

- Crane and tracks (transfer cars): POSCO SZ-5

- Pressure vessel: ASME SEC. DIV.I

Test method: Conduct test according to the measurement methods of the relevant Code.Acceptance criteria: Reference (value) of the applicable Code

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2. Scope and Reference Value as per Code

A. Vibration

CODE Scope and Reference Remarks

ISO 10816-1:1995 (E)

- Acceptance criteria Reference:Grade B or

higherRMS

VibrationVelocity

(/s)

Class Class Class Class

0.28 A A A A

0.45

0.71

1.12 B

1.8 B

2.8 C B

4.5 C B

7.1 D C11.2 D C

18 D

28 D

45

(A: Good; B: Satisfactory; C: Unsatisfactory; D: Unacceptable)

- Scope

* Class : Small machines (15 motor and below)

* Class : Medium-sized machines (15-75 motor; 300 motor and

below in case special foundation is installed)* Class : Large machines (300 motor and above assuming firm

foundation)

* Class : Turbo machines (300 motor and above assuming weak

foundation)

Reference value for vibration acceleration

* Reference value: actual data of POSCO

* Acceptable:

Within 0.710E-8N2D(g)

- N: Revolutions per minute (rpm)- D: Shaft diameter ()

* Range of vibration frequency permissible band for measuring instruments: 10~40 (ball and roller

native frequency)

* 1g=980.665cm/sec2

(Note) - Application: No load test (motor only) and actual load test on-site

- Measurement position: Bearing housing (H, V, and A directions)

- Target: Ball and roller bearing

- Limits: 300rpm and above, 15 and above

(note, however, that the DC motors limits are subject to the maximum speed)

Perform test following discussions between the supplier and POSCO regarding the objects to be

measured for vibration acceleration.

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B. Noise

CODE Scope and Reference

IEC-34-9(1990)

Table 1-Maximum permissible A-weighted sound power level LW*Method of cooling, IC Code, see IEC 34-6 Degree of protection IP code, see IEC 34-5

Rated SpeednN

Re`v/minnN960 960


8/21

C. Temperature

- 7 -


KS B

6301

- Acceptance criteria

Classification

Allowable Temperature Rise ( )()(for ambient temperature of less than

40 )Max. Allowable Temperature ( )

OnBearing

Measured with BimetalThermometer Sensor

On

Bearing

Measured with BimetalThermometer Sensor

Temp.of

Drained Oil

Air cooling-type,normal lubricant

40 45 75 80 -

Air cooling-type,heat-resistant

lubricant55 60 90 95 -

Water coolingtype

- Refer to agreement - 80 -

Forced-type,normal lubricant

- - 75 80 80

(the maximum allowable temperature should not be exceeded, however)

- Scope* Bearing section


IEC34-9

(1990)

Table 2-Maximum Sound Power Level LWA for 3-phase Cage Induction

Motor with Cooling Corresponding to IC01, IC11,

IC21, IC411, IC511, and IC611 Codes

Number of Poles 8 6 42

50Hz

2

60Hz

Rated Output, PN

Maximum Sound Power Level LWA

dB(A)

1.0 2.2 71 71 71 81 85

2.2 5.5 76 76 76 86 88

5.5 11 80 80 81 91 91

11 22 84 84 88 94 94

22 37 87 87 91 96 100

37 55 89* 90* 94* 98 101

55 110 92* 94* 97* 100 104

110 220 96* 98* 101* 103 107

220 400 98* 101* 105* 107 110

*Applies only to 50Hz; increase by 1 dB for 60HzNOTES:1. For motors having cooling corresponding to the codes IC01, IC11and IC21, typical enclosure classifications are IP22 and IP23.2. For motors having cooling corresponding to the codes IC411,

IC511 and IC611, typical enclosure classifications are IP44 and IP55


9/21


NEMA

- MG1

- 12.42


Reference specification: IEEE114, 112A

- Scope

* Single Phase and Poly phase Induction Motors

D. Centering

- 8 -


KS B

1551


* For the center of the shaft hole, waving on the shaft joint approximating the shaft joints

outer diameter

Tolerance: 0.03

* When assembling the shaft joint, waving of one shaft hole to the center of the other

shaft hole

Tolerance: 0.05

- Scope

* Flange-type, fixed shaft joint (rigid flanged shaft couplings)

KS B

1552

Pitch Circle Pitch Circle , Pitch TolerancePitch Circle , Waving

Tolerance

60,67,75 0.16 0.12

85,100,115,132,145 0.20 0.14

170,180,200,236 0.26 0.18

260,300,355,450,530 0.32 0.22

- Scope

* Flexible Flanged Shaft Couplings

KS B

1557


* Waving tolerance of each hub section

to the center of the shaft hole

- Scope* Grid Type Flexible Shaft Couplings

Tolerance (unit: )

a b

Below 0.05 Below 0.08 A

aA bA

InsulationGrade

Type A class Type E class Type B class Type F class Type H class

How toMeasure

Temp.Gauge

OhmMeter

Temp.Gauge

OhmMeter

Temp.Gauge

OhmMeter

Temp.Gauge

OhmMeter

Temp.Gauge

OhmMeter

Open Type 50 60 65 75 70 80 85 100 105 125Front,

Closed Type55 60 70 75 75 80 90 100 110 125


10/21

- 9 -


KS B

1553

- Acceptance criteria* Measure the waving of each section based on the shaft coupling face and insertion for the

outer tube or considering the center of the shaft hole for the inner tube and fixed flange.Tolerance shall comply with the table below:

- Scope

* Geared Type Shaft Coupling

(shaft coupling outer circumference rate 40m/s, shaft couplings revolution 4000rpm)

- Types of shaft coupling

KS B

1554

- Acceptance criteria* Tolerance for the waving of the shaft center on both sides and tolerance for torsion

between both bodies of the joint

- Scope

* Universal Ball Joints

Reference:

Normal

Type Tolerance (unit: )

a b

SS, SM, SE 0.05 0.03

CC, CE 0.08 0.05

Type SymbolRange of Shaft Joints Nominal

Outer Range of Max. Shaft Hole

Both sides normalNormal mill motorNormal shaft extension

SSSMSE

100~ 400 25~180

Both sides coverSide cover extension

CCCE 450~1,250 200~560

Nominal

d()

Waving of Shaft Center (Type A and B) Torsion (min)

Normal Grade A Type A and B Type AA and BB

6

8

10

12

14

16

20

25

30

32

35

40

50

0.1

0.1

0.14

0.14

0.14

0.14

0.2

0.2

0.25

0.25

0.25

0.25

0.25

0.05

0.05

0.07

0.07

0.07

0.07

0.1

0.1

0.12

0.12

0.12

0.12

0.12

200

200

180

180

180

180

180

80

80

80

80

80

80

500

500

450

450

450

450

450

200

200

200

200

200

200

aAB

A

Bb C

b C

C

D

aD

aD


11/21

E. Dimension

- 10 -


DIN 8570

(Part-1)


* Linear dimensions

* Angle measurements

- Scope* General Tolerances For Welding Constructions (Dimensions For Lengths And Angles)

Reference:

"B"

Degreeof

Accuracy

Nominal Dimension Range ()

30~120

120~315

315~1,000

1,000~

2,000

2,000~

4,000

4,000~

8,000

8,000~

12,000

12,000~

16,000

16,000~

20,000

20,00

0

A 1 1 2 3 4 5 6 7 8 9

B 2 2 3 4 6 8 10 12 14 16

C 3 4 6 8 11 14 18 21 24 27

D 4 7 9 12 16 21 27 32 36 40

Degreeof

Accuracy

Nominal Dimension Range ()

Allowable Variation (degree) Allowable Variation (/m)

315 315~1,000 1,000 315 315~1,000 1,000

A 20' 15' 10' 6 4.5 3

B 45' 30' 20' 13 9 6

C 1 45' 30' 18 13 9

D 130' 115' 1 26 22 18

90200

300

13/m 2.6

45'

(ex.)

(ex.)

50008


12/21

- 11 -


DIN 8570

(Part-3)


* Straightness, Flatness And Parallelism

- Scope* General Tolerances For Welded Structures (Form And Position)

Reference:

"F"

DIN 7168

(Part-1)


* Linear Dimensions (Excluding Radius and Chamfer Heights)

Reference:

"M"

Degreeof

Accuracy

Nominal Dimension Range ()-Larger Side Length of Surface

30~120

120~315

315~1,000

1,000~2,000

2,000~4,000

4,000~8,000

8,000~12,000

12,000~16,000

16,000~20,000

20,000

E 0.5 1 1.5 2 3 4 5 6 7 8

F 1 1.5 3 4.5 6 8 10 12 14 16

G 1.5 3 5.5 9 11 16 20 22 25 25

H 2.5 3 9 14 18 26 32 36 40 40

Degreeof

Accuracy

Nominal Size Range ()

0.5~3

3~6

6~30

30~

120

120~

400

400~

1,000

1,000~

2,000

2,000~

4,000

4,000~

8,000

8,000~

12,000

12,000~

16,000

16,000~

20,000

F 0.05 0.05 0.1 0.15 0.2 0.3 0.5 0.8

M 0.1 0.1 0.2 0.3 0.5 0.8 1.2 2 3 4 5 6

G 0.15 0.2 0.5 0.8 1.2 2 3 4 5 6 7 8

SG 0.2 0.5 1 1.5 2 3 4 6 8 10 12 12

1500

4.5

5000

8

PLAT

ex.

700.35000.8

ex.

700.3


13/21

- 12 -


DIN 7168

(Part-1)

* Radius, Chamfer

* Angular dimensions

(F: Fine; M: Medium; G: Coarse; SG: Very Coarse)

- Scope

* General Tolerances (Linear & Angular Dimensions): Machined products

Reference:

"M"

Reference:

"M"

Degree of

Accuracy


0.5~3 3~6 6~30 30~120 120~400

F0.2 0.5 1 2 4

M

G0.2 1 2 4 8

SG

Degree of

Accuracy


10 10~50 50~120 120~400 400

F1 30' 20' 10' 5'

M

G 130' 50' 25' 15' 10'

SG 3 2 1 30' 20'

90200

300

10'

ex.

10R1ex.

C101


14/21

- 13 -


DIN 7168

(Part 2)


* Straightness And Flatness

* Symmetry * Radial and Axial Runout

- Scope

* General Tolerances (Form and Position): Machined products

References

: "S"

Reference:

:"S"

Degree

of

Accuracy


66~30

30~120

120~400

400~1,000

1,000~2,000

2,000~4,000

4,000~

8,000

8,000

R 0.004 0.01 0.02 0.04 0.07 0.1

S 0.008 0.02 0.04 0.08 0.15 0.2 0.3 0.4

T 0.025 0.06 0.12 0.25 0.4 0.6 0.9 1.2 1.8

U 0.1 0.25 0.5 1 1.5 2.5 3.5 5 7

Degree ofAccuracy

Tolerance()

R 0.3

S 0.5

T 1

U 2

Degree ofAccuracy

Tolerance()

R 0.1

S 0.2

T 0.5

U 1

1500

0.2

ex.

0.5

R L

Surface table

ex.


15/21

3. Symbol of Each Inspection Item

Symbol - Uppercase: Witness (witness inspection by supervisor or inspector)

- Lowercase: Review (review of test report within the supplier/manufacturer)

Materials excluded from MA: SS000, SM000, FC000, S45C, SUS304, SGP (SPP)

- 14 -

Group Symbol Description

MaterialMA

HT

Material: Chemical, Mechanical properties

Heat treatment

NDT NT RT, UT, MT, PT (as required by the design)

VisualVI

FT

Appearance, Type, Model, Welding Visual

Edge Preparation & Fit-up Condition

Dimension DM Dimension (Including Runout)

AssemblyPA

WA

Partial Assembly, Match Mark

Whole Assembly, Match Mark

Function,

Performance

Test

PR

LK

BT

ST

FC

PF

NV

BL

HA

LB

LN

Pressure Test

Leakage Test (Water Flooding & Air Tightness)

Balance Test (Static and/or Dynamic)

Simulation Test

Function(No Load Test)

Performance(Load Test)

Noise, Vibration, Temperature Rise

Back Lash, Tooth Contact

Hardness Test

Lubrication Test

Lining Check (Including Chrome Plate)

Painting &

Packing

SP

PP

PK

Surface Preparation (Including Pickling Condition)

Painting(Including Rust Preventive Packaging)

Packing(Shipping Mark & Color Mark, Quantity)

Electrical

EL

SQ

IR

Electric Characteristics

Sequence

Insulation Resistance, Withstand Voltage Test

Others ZZ1: Mandatory Inspection (design), Z2: Mandatory Inspection (completion)

Z : Review of Test report on imported and electric parts


16/21

4. Inspection Item for Each of the Facilities Required by Regulation

Inspection in accordance with the Industrial Safety and Health Regulation (inspection of harmful or

dangerous machinery, equipment, facilities, etc.)

- Equipment and facilities to be inspected (not covered by the High-pressure Gas Safety Control Act

and Rationalized Energy Use Act)

Item Application Range

Crane All crane (including hoist)

Pressure vessel Operating pressure of at least 0.2f/G; [operating pressure(f/G)] x [inner volume()] 1

Press All press

Lift Elevation height of at least 18m; movable load 0.5 tons

Elevator or lifter Passenger elevator or lifter for freight with movable load of more than 1 ton

Boiler

The following boiler types shall be excluded from inspection:

A. Steam boiler with gauge pressure of not more than 1/; body inner 300,length 600

B. Steam boiler with gauge pressure of not more than 1/; heating area 1C. Hot water boiler with head pressure of not more than 35 m; heating area 14

D. Tube-type boiler with gauge pressure of not more than 10/ (excluding multi-tube type boiler

with head inner > 150); heating area 5 (for tube-type boiler with steam separator, make

sure that its steam separators inner 300 or inner volume 0.07)

- Required documents for carrying in products (issued by Korea Industrial Safety Corp. (KISCO))

* Certificate of Acceptance in Design Test

* Performance Test Report (when carrying in finished products)

- Witness inspection following completion of installation

- 15 -


17/21

Inspection in accordance with the Industrial Safety and Health Regulation (including protectors for harmful

or dangerous machinery, equipment, etc.)

- Type and scope of protectorsType of Dangerous M/C

and EquipmentProtectors and Their Application Range

Press or shear

1. Guard-type or gate guard-type protectors (for mechanism that slide runs while guardis locked and does not open while slide runs)

2. Hand-pressure protectors (with stroke length of 40mm and longer for slide andbelow 120 SPM)

3. Pullback protectors (same as hand-pressure protectors)4. Double-handle protectors (can be stopped while slide runs; has one-stroke, one-rest

mechanism)5. Sensing type protectors (with stopping mechanism while slide runs)

Acetylene welding M/Cor gas welding M/C

Including water seal- or dry-type safety device for preventing gas backfire and backflow

Explosion-proof electricmachines/equipment

1. Motor 2. Controller 3. Circuit breaker 4. Lighting fixtures 5. Instruments 6. Heater 7.Connection box (including Junction box) 8. Equipment and fittings for wiring 9.Electromagnet for electronic relays 10. Battery for vehicles

11. Controller 12. Electric machine/equipment radiating flame or heatLifting device Including overload protection device

Pressure vesselIncluding pressure release device operating below the max. operating pressure ofpressure vessels (equipped with safety valve)Including pressure release device for air compressor

Boiler Including pressure release device operating below the max. operating pressure

Roller(for rubber and synthetic

resin)Including emergency stop mechanism based on power interruption and brake

Grinder Including grinder wheel cover

Buzz saw for timberprocessing

Including repulsion protector and blade protector

Electric manual planer Including blade protector

Industrial robot Safety mat

Working equipment foroff/on line

Including protector for insulation and equipment for on line work

Temporary equipmentIncluding steel pile for puncheon; steel pile for scaffold, hand rail, railing, handle, andpiping; metal working platform installed on above 2m scaffold and workbench

- Be sure to use only the products tested by Korea Industrial Safety Corp. (KISCO). Imported goods must betested for performance.

Inspection in accordance with the High-pressure Gas Safety Control Act

- Equipment

Item Application range

Compressed gas

vessel

Pressure of 10f/G and above at normal temperature

Liquefied gas vessel Pressure of 2f/G and above at normal temperature

- Required documents for carrying in products (issued by the Korea Gas Safety Corporation)

* Performance test report (when carrying in finished products)

- Witness inspection following completion of installation

- 16 -


18/21

Inspection in accordance with the Rationalized Energy Use Act

- Equipment for inspection

Item Name of Equipment Application range

Machine

Steel boilerCast iron boiler

Excludes the following:

1. Boiler with max. operating pressure of 1/; shells inner 300, shells

length 600

2. Boiler with max. operating pressure of 11/; heating area 13. Tube-type boiler with heating area of 5

Hot water boiler Gas boiler with gas consumption of more than 17/h (200,000/h for LPG, LNG)

Pressurevessel

Class 1 pressurevessel

Class 2 pressurevessel

In accordance with the Scope of Pressure Vessels, Annex 1 (Rules for HeatingEquipment Maintenance)

Heatingfurnace

Steel heatingfurnace With rated capacity of over 500,000 /h

- Required documents for carrying in products

* Certificate of Welding Inspection (Korea Energy Management Corp. (KEMCO))

* Certificate of Structural Inspection (Korea Energy Management Corp. (KEMCO))

- Witness inspection after completion of installation

Inspection in accordance with the Electric Enterprise Act

- Equipment for inspection and required documents for carrying in products

ItemTest Certificate Issued by

RemarksAuthorizedInstitution

Manufacturer

High-voltagepower

receiving anddistributionequipment

Circuit breaker

Protective relayProtective equipment

Overcurrent relay, ground relay,impedance relay, COS, PF, FDS, etc.

High-voltagepowerreceivingequipment

TransducerArresterCircuit breakerTransformerCable (including head andterminal connection)Condenser

LS, DS, OS, AS, etc.; equipment withoutmetal shield layer is not acceptable

High-voltage

powerdistributionequipment

TransducerArresterCircuit breaker

TransformerCable (including head andterminal connection)CondenserMotor and motor starter

LS, DS, OS, AS, etc.; equipment withoutmetal shield layer is not acceptable

- Witness inspection before using Consolidating the means of confirming the test report on domestic products and imports

- Electrical equipment with rated voltage of less than 10000V: Manufacturer's test report

- Electrical equipment with rated voltage of 10000V or higher: Test report issued by an authorized

institution

- 17 -


19/21

5. Common Standards for Inspection

Unless stipulated otherwise, the following general standards are applied to the inspection for basic quality

assurance:

- 18 -

No.

EquipmentName

Standards for InspectionTestItem

Remarks

1 Steel Structure

Apply primer on Site Welding and Site Bolting sections

(inorganic Zinc Primer 25). PP

For long-term

storage

2

Motor, Reducer,

Pump, Blower,Conveyor,Bucket elevator,Rotary valve,Agitator, otherfunctionalequipment

1) In principle, extra pad shall be welded on the rotating machineor bed for earthing or on the base with the bearing blockmounted prior to machining ( ).

2) Equipment using V-belt or chain for power transmission musthave a tension adjusting mechanism.

3) The rotating part or bearing block (or its equivalent) loaded inthe downward direction must be equipped with a jack-up unit.

VI

More durability

Adjust duringoperation.

Preventsdeformation

3

Rotatingequipment suchas Reducer,Pump, etc.

Oil seal-assembled section must be subjected to Cr packaging

(15~50) or ultrasonic heat treatment prior to precisionmachining ( ).

VI Keep airtight.

4 Common

1) Be sure to conduct non-destructive test (MT) and HA(hardness) test on sections subjected to ultrasonic heattreatment.

2) Apply R machining to Key Way or misaligned section.3) Install a safety cover for the rotating operation section (color:

Munsell No. 2.5Y8/12) and indicate the rotating directions.4) The surface treatment grade should be set to SIS Sa 2 or

higher prior to painting.5) As a rule, random welding seam other than those specified in

drawings is not allowed (as pre-approved in the CuttingPlan).

6) The jointing bolt under load should be used as high-tensionbolt.

7) Check materials such as the SUS 316 series via themolybdenum (Mo) detection test.

8) No asbestos products may be used in accordance with theEnvironmental Conservation Act; use only non-asbestos-basedproducts.

NT

VI

VI, PP

SP

VI

VI,PA

ma

VI

Check for anydefects

Exclude theweak points

Secure safety

Ensure durabilityEnsure quality

Ensure durabilityand qualityCheck theavailability of thesuitablematerialsLegal

restrictions(no harmfulsubstancesused)

FanV-belt

Belt tensionAdjusting Bolt

(ex.)

Downward load Downward

load

Jack-up unitStopperWelding

(ex.)


20/21

- 19 -

No.

EquipmentName

Standards for InspectionTestItem

Remarks

4 Common

9) Cr plating should be used for the cylinder tube and on thepiston rod.

10) Block packaging should be used for a square bar measuringover 100x100mm.

11) Be sure to inspect the test items indicated in the drawing orspecification.

12) For the non-destructive inspection of machined products,

inspect UT following rough machining and MT (PT) after thefinal machining.

13) Check whether the mandatory test items are inspected beforedelivery.

VI

PK

All

NT

VI

Durability, anti-corrosionEasy handling

Quality check

Suitable for judgingdefectsRequired item

5 Motor

1) The Terminal Box should be used in the form of molding orsteel plate weighing at least 3t; the contact area should bemachined ( ).

2) The outdoor motor should be equipped with a space heater toprotect its interior from condensation (for high-voltage andlow-voltage large motors).

VI

Durability,airtightness

Preventcondensation.

6 TransformerThe access door should be installed to check the BUSconnections in the Terminal Box (oil type).

VI Maintenance

7 Panel

1) The door locking device should be Cr-coated or made ofstainless material.2) For the stand-alone type is installed a door stopper.3) Install common T/B on the front (primary side) of the Ampere

meter is installed.4) Install concenton the panel with the PCB mounted.

(The panel equipped with PCB is installed the consent.)5) Check the availability of internal space required for installing

cable is prepared.6) Install OCRs in all 3-phase, high-voltage (over 3.3KV) main

lines. (OCR is provided at the three phase for high voltage(over 3.3.kv))

7) OCR for transformer and 3E- relay for motor is provided.8) Power fuse for motor is to be M type and for transformer is to

be T type.9) The starting device like reactor is to be provided the

protection device at the primary side.10) VVVF motor regenerative controlled is to be provided the

non-directional watt meter.11) CTT and PTT is to be provided at the primary side of the

relay.12) Circuit breaker and cable are to be selected with considering

rated current and short circuit current as per voltage level13) Protection relay is to be provided as per the load

characteristics and grounding method.14) Protection device for emergency feeder is provided with the

same as per main feeder.

VI Anti-corrosion

Easy maintenanceEasy check andmaintenance

Secure 2nd CablingspaceSecure protection(safety).

Easy monitoring ofoperation statusSecure protection(safety).

8 Crane

Apply RT 100% to the Butt Welding section on the plate at thebottom of the Box.

NT Durability

Standards for One-Line Diagram including close switchboard: For details, see Panel Page 13~16, 41, and 63.

Back gauging (RT: 100%)

- Butt joint

6.6KV line

OC

RCTT,PTTCTX

3

7-11) Diagram6.6KV line

OC

R

OC

R

OC

ROC

GR

A

C

T

7-6) Diagram


21/21

6. Related Codes (legend)

POSCO SZ (Standard Zip Code): Common Technical Specification

ISO: International Organization for Standardization

DIN: Deutche Industrie-Normen

ASTM: American Society for Testing and Materials

ANSI: American National Standards Institute

NEMA: National Electrical Manufacturers Association

IEC: International Electrotechnical Commission

FEM: Federation Europeenne De La Manutention

AWS: American Welding Society

ASME: American Society for Mechanical Engineers

JIS: Japanese Industrial Standard

JEC: Japanese Electrotechnical Committee

JEM: Japan Electrical Manufacturers Association

IEEE: International Electric and Electronics Equipment

CMAA: Crane Manufacturers Association of America

AISE: Association of Iron and Steel Engineers

SIS: Swedish Standards Institution

BS: British Standards NANE: National Association of Corrosion Engineers

SSPC: Steel Structure Painting Council

API: American Petroleum Institute

MSS SP: Manufacturers Standardization Society for Standard Practices

EJMA: Expansion Joint Manufacturers Association

TEMA: Tubular Exchangers Manufacturers Association

JGMA: Japanese Gear Manufacturers Association

UL: Underwriters' Laboratories

00 common standards

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