B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
(OP)
Per B31.3, impact testing for a weld is not required if the maximum obtainable width across the notch is less than .098".(correct me if I'm wrong) Base materials and filler metal are good at the -50F temp. If I run a .096" thick PQR, naturally I cannot get a charpy of .098" width. This would qualify the WPS for a thickness range of .098 to .196. Obviously I COULD get a charpy specimen out of a .196 coupon. I have always thought that this range would be acceptable per Sec. IX and B31.3 without any impact testing even though the upper end of the qualified thickness range could be impact tested. Is this correct? Thanks.





RE: B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
RE: B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
Could you please elaborate on your response? Thanks.
RE: B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
I think you may be confusing the rules for fabrication with the rules for qualifying a weld procedure. Refer to Sec IX for your PQR.
RE: B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
RE: B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness
Read QW-403.6 (if it applies) and review QW-451.
RE: B31.3/Sec IX Weld Procedure Impact Testing Exemption by Thickness