Please find the revised ITP 041-01(inspect plan) for your approval.
Please kindly note : all W&RI points will be checked during final inspection and no intermediate inspections will be performed.
Also, please confirm that PTTGC will attend the inspection at factory, Spain.
For QAF-75 (Procedure Qualification Record) which you comment about SA 312 TP 304H.
The factory informs that :
Since High Frequency resistance welding (HF) is a process not covered by ASME Code, we perform our welding procedures following ASME IX as a guide all that we can. In this way, our essential variables are only P-number and group of tube and fin material, following the classification of ASME IX QW/QB-422, do not matter tube and fin sizes and/or fins/meter because of the low penetrations obtained by means of the High Frequency, not affecting the micro-structure of the tube.
Accordingly, since SA 312 TP 347H and TP 304H are both P Nº 8 Group 1, the PQR is correct for your materials combination. Moreover, it is precisely the WPS 041-02 the document who has to show the real material combination and dimensions of your pipes, being supported by the PQR earlier clarified.
Please kindly confirm your acceptance by approve the document.