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Eakkachai Warinsiriruk

Production Engineering (B. Eng)

Master Degree of Welding Engineering (M. Eng)

International Welding Engineering (IWE); TH-IWE-0043

Certified Assistant Welding Inspector (CAWI)

Radiographic Films Interpretation (RI) ; KMUTT-RI-005/2006Liquid Penetrant Testing Level II

(ASNT/ASTM1417-05-Aerospace Component)

UT/MT Level I; CGSB

Welding Procedu re and

Welder Qual i f icat ion

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Content 1 Objective of WPS, PQR and WQT/WOPQ.

2 Step for Welding Qualification.

3 Welding Procedure Qualification on AWS D1.1

4 Welder Performance Qualification on AWS

D1.1

5 Case Study.

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Meaning for WPS, PQR and WPQ A Welding Procedure Specif icat ion (WPS) [1] is a written

document that provides direction to the welder or welding operator

for making production welds in accordance with Code requirement.

1: ASME BPV CODE Sec IX 2004

The Procedure Qual if icat ion Record (PQR)[1] documents what

occurred during welding the test coupon and results of testing of thecoupon.

In Performance Quali f icat ion[1], the basic criterion established for

welder qual i f icat ion is to determine the welders ability to deposit

sound weld metal. The purpose of the performance qualification test

the weld ing operator is to determine the welding operatorsmechanical ability to operate the welding equipment.

*** The purpose for qualification of a WPS is to determine that the weldment

proposed for construction is capable of providing the required properties for

its intended application. Welding procedure qualification establishes theproperties of the weldment, not skill of the welder or welding operator.

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Scopes o f the WPS, PQR, and WPQ.WPS PQR WPQ

Specify:

Variable rang es

Essent ial var iables

Nonessent ial var iables

other direct ions

Record:

Ac tual values

Essent ial var iables

Test and result

oth er data

Record: Specify:

Values Range

Test Qualif ied

Record Test

and

Test Resul t

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Suggested Format for WPS

Please see attached Documents

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Suggested Format for PQR


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Suggested

Format for WPQ


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Welding Application

From Sawatudom Engin eering (Rayong) Co., Ltd.

Air Receiver Tank : SA 516M Gr 485

Follow on ASME BPV Code Sec VIII Divis ion 1 2004

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Examp le for Weld Map (Air Receiver Tank )

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Welding Eng ineer ingshall be plan the weldingmethods and fabrication in these job.

- Material Characteristic?, Process?, Filler metal?

- Plant Facilities? And Cost control?

-How many use to welder/ welding operator?- How do to minimize test coupon?

- How do to quality control during weld?

- Other constraint?

Solution:

1)

2)

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Qualification onAWS D1.1

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Welding ProcedureQualification

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See Table 3.1 ,Table4.8 andAnnex M

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Graville DiagramHSLA Steels TMCP Steels Low-carbon SteelsCr-Mo SteelsQT Steels

HTLA Steels

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Weld Positions for Groove Weld

Weld Posi t ion on Plates

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Groove Weld on Pipes

Why 6G,

6GR

qualified allpositions
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The engineering shall be consider to essential variables for

these project. Because, that consideration is become tominimize PQR tests (minimize budgets for test).

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***
http://thumbs.ebaystatic.com/pict/1200369610544040_0.jpg

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AWS D1.1: 4.8 Method of Testing and AcceptanceCriteria for WPS Qualification

Visual Inspection NDT

Mechanical Test

Macroetch Test

Retest

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*** How much forsize of eachspecimens?

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Welding Operation Welder: One who performs

manual or semiautomatic

welding Welding, Manual: welding

wherein the entire weldingoperation is performed andcontrolled by hand.

Welding , Sem iautomaticarc: arc welding withequipment which control onlyfiller metal feed. The advance

of the welding is manuallycontrolled.

AWS A3.0/ CASTIGuidebook to ASME section IX: Welding Qualification

Welding Operation

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Welding operator: one whooperates machine or automaticwelding equipment.

Welding , Mach ine: weldingwith equipment that hascontrols that arc manuallyadjusted by the weldingoperator in response to visualobservation of the welding, withthe torch, gun or electrodeholder held by mechanicaldevice.

Welding, Au tomat ic: weldingwith equipment performs the

welding operation withoutadjustment of the control by awelding operator. Theequipment may or many notperform the loading and

unloading of the work.

Welding Operation

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AWS A3.0/ CASTIGuidebook to ASME section IX: Welding Qualification

Welder Performance

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Welder PerformanceQualification

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Case Study12

3
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