weld API 5L x65 and X56

Yeah right, you can weld anything you want as long as you approve the corresponding WPS/PQR. But in this case is quite strange That you want to weld. Why?. No more X65 in your warehouse stock?

Hi, thanks for your comments.

Basically, we are manufacturing a pipeline, but effectively there were available at market fittings according to MSS SP75WPHY65 and flanges A694-F65, But pipe was purchased as API-5L-GR-X56 & X60. My understanding is that ONLY the difference will be the grade X65, X56,X60, that is related with the maximum yield stress and can be adjusted with higher thickness in case of X56 and X60 in order to match the design conditions of X65. there is something special that I need to take care?

thanks

I would prepare a procedure (WPS/PQR) with first and second (Hot pass) pass downhill with E-8010 and filling uphill with E-8018. I think, there should be no inconveniences.

Yes take care about charpy test.

WP

thanks for your comments, my QA is reviewing that WPS /PQR are accordingly.

why charpy test is required?

For the grade of steel that you say, I assumed it is to be used according to API 1104 psl 1. (pipeline or gas pipeline). But sorry, that's not the only possibility

yes will be API 1104, but PLS2, should be charpy test applied?.

The name for charpy test in API 1104 is CTOD. You have to review Points A.3, A.3.2 and A.3.3 (API 1104 code) and read the corresponding notes. And yes, I think you requiere Toughness test. More than this, if you are in Europe, take care about PED specs.