Friday, December 24, 2010

[MW:8921] Backing gas

Dear all ,

we are facing  problem for Stainless steel  bad support welding as per wps if wall thickness is less then 6.3 mm purging should be required but some of supports has been welded without purging

Material is A312-TP321 DN 150 SCH 10S

DO have any comments on this issue, for this problem actual purging is required or not

PLZ .write your comments

 

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