Scope: In part-2, of this article we had discussed the sequence to be used for qualification of procedure (PQR) which needs to be approved by customer/client/TPI. (Please click here to read that article) Now we shall proceed for performance (welder) qualification i.e Welder performance qualification – WPQ or welder qualification test – WQT (which will be discussed in brief as the steps are identical to PQR qualification). This discussion shall….
In Part-3 of this article the Subsection A was covered from UG-36 up to UG-79, to read the Part-3 of this article please click here. To read Part-1 of this article, please click here. To read Part-2 of this article, please click here. This article i.e. Part-4 will deal with the general requirements preceding from UG-80 onwards. Subsection A UG- 80: Ovality tolerances for cylindrical, conical and spherical pressure part….