what is the exact method of conducting welder performance test ie.procedurefor welder performance test?what should be written first WPS or PQR also and who have the authority to certify the same ,inspection agency or ASNT III person
thanx
cp
the welder performance qualification (WPQ) is always carried out as per WPS . the WPS is nothing but the welding procedure specification to carry out a specific job of fabrication with designated parameters and procedures. Usually the classification society which is responsible for the controlling of quality of particular job ( or the project )is nominated/recommended by the buyer of the job/project. Any surveyor or inspector of any classification society who is associated with is empowered to witness the test and certify the welder.
So, first you have to design a WPS as per the job demands, get it tested/ witnessed by the appropriate surveyor/ inspector and the outcome results should be recorded in PQR. if WPS , PQR approved you can go ahead with welder qualification tests.
OK ,we designed a wps and pqr and witness it qualified then why we need a welder test since the welder (identified)itself qualified who welded, by qualifying wps and the data recorded in pqr.