Weld Qualification Testing

A weld sample is produced prior to commencing the final welding of the product. All welding variables are controlled and recorded when welding the weld sample or coupon. These welded coupons are  then tested to ensure that the weld joint will be of acceptable quality.

The types of tests involved in  weld testing are visual inspection, non-destructive testing such as Radiographic examination (RT), Ultrasonic testing ( UT or UFD), Magnetic Particle test (FMPI or MPI or MT) and Liquid Dye Penetrant Test ( DPI or PT) followed by appropriate mechanical test such as Weld tensile test, transverse test, longitudinal bend test, transverse bend test, impact test, macro examination or macro test, hardness survey or hardness test, weld fracture test, nick break test, fillet break test, corrosion resistance test, metallographic test, microstructure test, ferrite count test, ferrite number test, post weld heat treatment or stress relieving and chemical analysis. 

The welded sample or coupon is often tested at various stages of fabrication such as for Welding Procedure Qualification Record (WPQR), to qualify Welding Procedure Specification (WPS), to qualify welder as Welder Qualification Record ( WQ or WQR) and to accept the final product in the form of Production Weld test.

LMATS provides services such as Welding Procedure Specification (WPS), Weld Procedure Development, Welding Procedure Qualification record Witnessing (WPQR), Welder Qualification Witnessing (WQR), WPQR Weld Qualification, Welder (Performance) Qualification, Visual examination, Visual Inspection of welds, Non-destructive examination of welds, all mechanical tests, welding machine calibration such as Current calibration, Voltage calibration and gas flow calibration as required by several standards.   LMATS comprises a team of Metallurgist, Engineers, Welding Engineers and technologist, Welding Supervisors and Inspectors, Scientist, Engineering Technologist and Non-destructive testing Technologist. The combination of these professionals from different speciality ensures that the  welding task is completed efficiently and within shortest duration. Weld testing is performed every hour in LMATS laboratories.

 LMATS Melbourne and Sydney laboratories performs these tests in accordance with AS 3992, AS 1210, AS 4041, AS 4037, AS 2885.2 Tier 2, AS 1554.1, AS 1554.2, AS 1554.3, AS 1554.4, AS 1554.5, AS 1554.6, ASME IX, AWS D1.1, AWS D1.2,. AWS D1.3, AWS D1.4, AWS D1.5, AWS D1.6, ISO 15614.1, ISO 15614.2, ISO 15614.3, ISO 15614.4, ISO 15614.5, ISO 15614.6, ISO 15614.7, ISO 15614.8, ISO 15614.11,  ISO 15614.12, ISO 15614.13, ISO 9606.1, ISO 9606.2, ISO 9606.3, ISO 9606.4, ISO 9606.5, EN 287.1, EN 287.2, EN 287.3, EN 287.4, EN 288.1, EN 288.2, EN 288.3, EN 288.4, DNV F101, API 650, EXXON Mobil, ESSO Shell specification and similar national and international standards.