INGENIEUR
INGENIEUR
Welding Procedure Specification ( WPS ) Welder Qualification Test ( WQT )
Drawing Evaluation
Identify Welder
Prepare pWPS Conduct WQT
Conduct WPQT
Evaluate the Test Coupon
No
NDT Pass
Yes
Laboratory Test Pass
Yes
PWR
WPS
No
No
Re-evaluate the essential variables
Figure 4 : Sample “ Welding Procedure Specification ” and “ Welder Qualification Test ” Flow Chart Source : Interpretation per AWS D1.1 ( Structural Welding Code - Steel ), ASME Section IX ( ASME Boiler & Pressure Vessel Code ), and API 1104 ( Welding of Pipeline )
Pass
Remarks :
Welder Qualified
Reject
Undergo Additional Training
● A WPS is generally the intellectual property of a company and not transferable between different organisations . Thus , nearly all welding companies will have a document depository containing current and previously qualified WPS which will be pulled out for use when needed .
● Some industry may allow pre-qualified WPS which possess a pre-define parameter from the welding code book such as AWS D1.1 to perform welding on non-critical parts without above qualification test . Nevertheless , not all industrial welding code and standard have pre-qualified WPS in-place for use .
● In Malaysia , the above Flow Chart may involve Government parties if the product is legislation related . For example , Department of Occupational Safety & Health ( DOSH ) engagement in Certificate of Fitness for Steam Boiler , Unfired Pressure Vessel or Hoisting Machine in accordance to “ Factory and Machinery ( Notification , Certificate of Fitness & Inspection ) Regulation 1970 , Part II . Also , pipeline works per Petroleum ( Safety Measure ) ( Transportation of Petroleum by Pipelines ) Regulation 1985 .
42 VOL 96 OCTOBER-DECEMBER 2023