WPS and PQR for SA335-P91

Can anyone give me any guideline or SAMPLE WPS/PQR for SA335-P91 Welding .

P91 is a ferritic alloy steel with 9 Cr, 1 Mo and same grades with V.

Its for ASME SA 335 Grade Seamless Pipe Welding by SMAW and GTAW process.

Regards

S Jana

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