Welder Performance Qualification (WPQ)

A Welder Performance Qualification (WPQ) is a test certificate that shows whether a welder possesses the necessary experience and knowledge to perform the specifications of a particular weld procedure. MES conducts destructive and non-destructive tests on a weld coupon provided by the welder to determine whether the welder is capable of producing a good weld quality using the welding processes, materials and prescribed procedures. Upon passing the procedure requirements, a welder is given a qualification record (WPQR) specific to the procedure weld variables.

The scope of the WPQ test varies depending on the weld procedure, but it generally involves non-destructive and destructive testing.

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  • Visual Inspection (VT)
  • X-ray Inspection (RT)
  • Dye Penetrant (PT)
  • Ultra-sound Inspection (UT)
  • Mag Particle Inspection (MT)
  • Tensile Tests
  • Bend Tests
  • Hardness Tests
  • Micro Hardness
  • Nick Break
  • AWS D1.1
  • API 1104
  • API 5L
  • ASME
  • MIL