PWTT conducts tests per section IX, API 1104, and AWS D1.1 standards. AWS Certifications are also available.
PWTT offers certification testing for the following qualifications and standards:
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.
PWTT 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.
Welder Procedure Specification/Performance Qualification Records (WPS/PQR):
A Welding Procedure Specification (WPS) is the formal written document describing welding procedures, which provides direction to the welder or welding operators for making sound and quality production welds as per the code requirements . The purpose of the document is to guide welders to the accepted procedures so that repeatable and trusted welding techniques are used.
Performance Qualification Records (PQR) are collections of test cases used to verify that a system performs as expected under simulated real-world conditions. A WPS is supported by a Procedure Qualification Record.
ASME Certification (American Society of Mechanical Engineers):
The most commonly used codes for qualifying welders are the American Society of Mechanical Engineers (ASME) Section IX and American Welding Society (AWS) D1.1. Committees and subcommittees comprising volunteer workers interested in furthering the quality and efficiency of the welding industry work together to develop these codes.