![]() The interpretation provided by HMN is not applicable here as the question in the interpretation is referring to QW 403.6 only. ASME B31.3 allows the above range without the re-qualification of IMPACT TEST, not the other mandatory test (TENSILE AND BEND) as required by ASME Sec IX i.e the thickness above 7.52 to 9.76 mm doesn't require impact test, however does require mandatory tests as required by ASME Sec IX.Īlways the essential / supplementary essential variables as per ASME Sec IX to be followed as it allows those range after the successful mandatory test until and unless your construction code / project specification amend any of those variables explicitly. ASME B31.3 specified thickness range from T/2 to T+6 (which is 1.88 mm to 9.76 mm in this case) only when impact test requirement is imposed provided the requirements of ASME Sec IX for PQR testing is met. However ASME Sec IX takes least precedence than construction code. Thickness beyond 7.52 mm requires re-qualification. ASME Sec IX qualifies base metal thickness qualified range from 1.88 mm to 7.52 mm (consider only table QW 451) and ASME B 31.3 is bound to use ASME Sec IX code for qualification. ![]()
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