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QUALIFICATION OFPROCEDURE AND WELDER(19 February 2014)
QUALIFICATION OFPROCEDURE AND WELDERThe most important tasks priorproduction weldingWeldingqualificationsarestatements by which the weldingprocedures and personnel have beentested in accordance with theproper codes or specifications andfound to be acceptable
PROCEDURE QULAIFICATIONShould be considered before both thewelder qualification and the productionwelding are takenDemonstrate the compatibility ofBase metal;Filler metal;Process(es);Techniques; andWelding conditions
ADVANTAGESEliminate the possibility of reject of weldEliminate project delayCost effectivenessEnhance quality (both in weld and project)Able to identify problems when, or evenbefore the problems occur
PROCEDURE QULAIFICATIONApproaches to procedure approval byPre-qualified proceduresActual procedure qualification testingMock-up tests for special applications
Pre-qualified ProcedureNo need perform actual qualification testingas long as the welding parameters are withincertain prescribed limitsAWS D1.1 to D1.5 and D9.1 contain prequalified procedures for various aspectsAWS D1.1 – Structural welding code – SteelAWS D1.2 – Structural welding code – AlAWS D1.3 – Structural welding code – Sht SteelAWS D1.4 – Structural welding code – ReinforcedAWS D1.5 – Bridge welding codeAWS D9.1 – Sheet meta welding code
Pre-qualified ProcedureEssential variables are listedAWS D1.1 list out the essential variables includingthe followings (but not limit to)Welding Processes (SMAW, SAW, FCAW, GMAWexcept SC transfer)Base metal & filler metals Thickness rangescoveredConfiguration and techniques If the essential variables changed beyond certainlimits, require a new procedure qualification
Pre-Qualified Procedure (AWS D1.1)
Pre-qualified ProcedureOther typical pre-qualified procedures are:ASME Section IX (Welding and Brazing Qualification)(Standard for Welding Pipelines andAPI -1104Related Facilities )Defines essential variablesWelding processesBase metal and filler metalsThicknessConfiguration and techniquesTesting required
Pre-qualified Procedure in BS ENBS EN 288–7 : 1995Specification & Approval of Welding Procedures forMetallic Materials Part 7 – Approval by a StandardWelding Procedure for Arc WeldingBS EN 288–5 : 1994Specification & Approval of Welding Procedures forMetallic MaterialsPart 5 – Approval by usingApproved Welding Consumables for Arc WeldingBS EN 288–6 : 1995 Specification & Approval of Welding Procedures forMetallic MaterialsPart 6 – Approval related toPrevious Experience
BE EN 288-7 : 1995Covering ranges for all relevant parameters.user of standard welding procedure,welding equipment,personnel qualification,environmental conditionsShall be in the format of either a WPS or aWPAR Shall be signed and dated by the examineror test body
BE EN 288-5 : 1994Based on approved consumableShall specify the range for all the relevantparametersShall be carried out by an examiner or test bodyThe essential items for the approval are :Specifications of parent metal(s) to be usedRecords of the approved consumables to be usedA specific pWPS suitable for the application
BE EN 288-6 : 1995Shall be carried out by an examiner or test bodyShall demonstrate previous experience byDocumented exam and/or test dataSatisfactory documentation of tests, andA summary of welding manufacturing of atleast one yearSuitability of welds in service for an appropriate period
Welding Procedure QualificationASME QualificationWelding Procedure Specification (WPS)written document which are greater in detail,to give guidance to the welder, or weldingoperator, performing production weldmentsstates bothvariablesessentialandnon-essentiala new or revised WPS and re-qualification isrequired if a change is made in one or moreof the essential variables
Welding Procedure QualificationASME QualificationProcedure Qualification Record (PQR)May also be called as Welding ProcedureQualification Record (WPAR)A form to record actual test condition including theessential variables, welding process, test result, etc.A change in any essential variable shall require requalification and to be recorded in another PQR.If a change is made to one or more of the nonessential variables, there may be numerous PQRreferencing a single WPS
Welding Procedure QualificationTest RequiredTest specimen are removed and destructivelytested to be judged as acceptable or rejectablebased on the accompanying requirementCommon testsTensile, Bend (face, root, side)Macro-etch, Fillet breakNDTOther tests Impact, Hardness, Corrosion, etc
BE EN 288-3 : 1997Specification & approval of welding procedures formetallic materialsPart 3. Welding procedure tests for the arc welding ofsteelsSuperseded by EN ISO 15614-1:2004Specification and Qualification of Welding Proceduresfor Metallic Materials - welding Procedure TestPart 1 Arc and Gas Welding of Steels and Arc Weldingof Nickel and Nickel Alloys
Mock-Up TestIs a actual trial welds on joint in order tosolve the problemSometimes used for complex and specialjoint configurations where a concern aboutthe overall shape or condition might begreatly affected by the welding operation
Mock-Up TestApplicable examples as high levels ofrestraint and inaccessible weld jointsare possible causes of weldingproblems but these are more difficulttoevaluateusingastandardqualification test
BE EN 288-8 : 1995Specification & approval of weldingprocedures for metallic materialsPart 8. Approval by a pre-productionwelding test
AWS D1.1 to D1.5 and D9.1 contain pre-qualified procedures for various aspects AWS D1.1 –Structural welding code –Steel AWS D1.2 –Structural welding code –Al AWS D1.3 –Structural welding code –Sht Steel AWS D1.4 –Structural welding code –Reinforced AWS D1.5 –Bridge welding code AWS D9.1 –Sheet meta welding codeFile Size: 1MBPage Count: 20People also search formedical billing and codingasme section 9 welding proceduresAWS D1.4 welder qualificationaws d1.1 welding proceduresasme welding procedures 31 3AWS D1.4 welder qualification form
