Description

Welder Quali cation

Welder Quali cation needs to be performed to confirm the welder’s ability to deposit sound weld metal for a specific type of weld, material and weld position.

WPS Quali cation

WPS qualification serves the purpose of determining whether the welds are capable of providing the required characteristics for its application.

The extent of testing required to qualify the WPS will depend on whether pre-qualified weld preparations and consumables are used. In some instances (e.g. where standard pre-qualified welds are used), minimal or no testing may be required. Where WPS qualification is required, weld test pieces (also called weld coupons) are fabricated according to the WPS and the compliance standard. Non Destructive Testing (NDT) and Destructive Testing (DT) is then carried out on the test pieces to check for weld defects and the properties of the joint. A Procedure Qualification Record (PQR) or Welding Procedure Qualification Record (WPQR) is used to document the weld qualification.