How many PQRs are required
How many PQRs are required
(OP)
Dear all,
Is there any paragraph that we can refer to in ASME Section IX about how many PQRs need to be prepared for tanks ?
In other words, what is the parameters need to be considered in making separate PQRs. Material thicknesses ? P and group number ? SMAW , SAW, FCAW, GTAW, GTAW + SMAW ? With or without backing strip ?
Syah
Is there any paragraph that we can refer to in ASME Section IX about how many PQRs need to be prepared for tanks ?
In other words, what is the parameters need to be considered in making separate PQRs. Material thicknesses ? P and group number ? SMAW , SAW, FCAW, GTAW, GTAW + SMAW ? With or without backing strip ?
Syah





RE: How many PQRs are required
Best regards - Al
RE: How many PQRs are required
Alloy group, weld method, and backing would each require new ones.
With thickness you have some allowed range.
Read up.
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P.E. Metallurgy, Plymouth Tube
RE: How many PQRs are required
RE: How many PQRs are required