The weld procedure specification (or WPS) is the 'recipe' for carrying out a particular weld. It specifies the welding parameters that must be adhered to for compliance to that welding procedure. For welding these 'essential variables' include;
This method is very suitable for “one-off” construction due to non use of molds moreover it is very suitable for classic replicas where lots of bright varnished wood is required.
The ship classification societies all require approved welding procedures to be used. For example, DNV allows welding procedures to be approved in one of three different ways. Firstly, if the WPS is based on another approved welding procedure, secondly, from verification of documentation showing successful application of the WPS over a prolonged period of time. Thirdly, and most commonly, weld procedure approval is done through review of weld procedure qualification records (WPQRs), collected from the assessment of a test weld made using the WPS. IACS shipbuilding and repair quality standard also requires that a welding procedure should be supported by such a welding procedure qualification record.
