X65 welded to X52/X42 duel grade pipe
X65 welded to X52/X42 duel grade pipe
(OP)
We want to weld a X-65 cap to a X42/X52 duel grade pipe. I know according to API 1104 that when welding materials of two seperate material groups that the WPS for for the higher strength material is to be used.
My issue/question: Is procedure for X-65 allowable for the X42/X52 duel grade pipe. I'm thrown off by the X-42 since that would mean three different material groups. I have only dealt with going a group up or down but not jumping from group a to c.
Any guidance???
My issue/question: Is procedure for X-65 allowable for the X42/X52 duel grade pipe. I'm thrown off by the X-42 since that would mean three different material groups. I have only dealt with going a group up or down but not jumping from group a to c.
Any guidance???





RE: X65 welded to X52/X42 duel grade pipe
Steve Jones
Materials & Corrosion Engineer
http://www.linkedin.com/pub/8/83b/b04
RE: X65 welded to X52/X42 duel grade pipe
RE: X65 welded to X52/X42 duel grade pipe
RE: X65 welded to X52/X42 duel grade pipe
There can be a problem if pipeline is in sour service and X42 was selected and purchased with appropriate chemistry and mechanical property limitations.
RE: X65 welded to X52/X42 duel grade pipe