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ACCEPTANCE CRITERIA FOR PIPE WELD JOINT FOR SERVICE AT -196 DEG C

ACCEPTANCE CRITERIA FOR PIPE WELD JOINT FOR SERVICE AT -196 DEG C

ACCEPTANCE CRITERIA FOR PIPE WELD JOINT FOR SERVICE AT -196 DEG C

(OP)
WHEN CRYOGENIC VESSEL(-196) MADE OUT IF SA 240 GRADE WITH SA 312 TP 304, 25 NB 10 SCH PIPELINE WHAT SHOULD BE ACCEPTACE CRITERIA FOR PIPE WELDING GTAW QUALIFICATION.

RE: ACCEPTANCE CRITERIA FOR PIPE WELD JOINT FOR SERVICE AT -196 DEG C

In general the assentic stainless tseel have very good mechanical properties at -196C.  If my memory is correct the tensile strength and toughness is greater at -196C than at ambient temp 30C. Therefore acceptance criteria should be the same as at room temperature.  

RE: ACCEPTANCE CRITERIA FOR PIPE WELD JOINT FOR SERVICE AT -196 DEG C

Our requirements for welding of cryogenic components made from S/S were 100% RT. This was for both pipe and vessels. It used to UW-11 ASME VIII.  

RE: ACCEPTANCE CRITERIA FOR PIPE WELD JOINT FOR SERVICE AT -196 DEG C

Additionally you can refer the following codes;

ASME Sec.VIII Div.1, UHA-51 (a)
ASME Sec.VIII Div.1, UHA-51 (c)
ASME Sec.VIII Div.2, AM-211.2
ASME Sec.VIII Div.2, AM-213 (a)
ASME B31.3, Para. 323.2.2
ASME B31.3, Table 323.2.2 and Note (36) of Table A

Thomas

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