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Welding w/ E6010 root on X-65 pipe

Welding w/ E6010 root on X-65 pipe

Welding w/ E6010 root on X-65 pipe

(OP)
Two questions:
1. Is weld rod numbered by ultimate strength or yield strength?  ...hearing ultimate, but want to check.
2. Seeing Welding Procedures for X-65 pipe where E6010 is used as a stringer (due to ease of laying down a good root with complete fusion) with E8010 for hot pass through cap. The explaination given is the E8010 hot pass blends with the re-melted E6010 to give a root of sufficient strength. Anyone have official standards that confirm this as being adequate? Anyone know what the Office of Pipeline Safety's (OPS's) official stand on weld rod situations like this is?

RE: Welding w/ E6010 root on X-65 pipe

Quote:

1. Is weld rod numbered by ultimate strength or yield strength?  ...hearing ultimate, but want to check.

minimum UTS

Quote:

2. Seeing Welding Procedures for X-65 pipe where E6010 is used as a stringer (due to ease of laying down a good root with complete fusion) with E8010 for hot pass through cap. The explaination given is the E8010 hot pass blends with the re-melted E6010 to give a root of sufficient strength.

This has been an issue during joint reviews with ASME certificate holders. In my opinion, E6010 could be used for the root pass if the remainder of the weld joint is filled using a filler metal that has a tensile strength that is at least equal to or greater in strength in comparison to the base material. The proof of this argument is that the welding procedure using 6010 and other filler metal passes a Section IX qualification.

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