Recent content by jinlongman

Dear All, I have question. Qualification of welders according to ASME IX Code QW-301.2. We want to qualify welders to a valid WPS, PQR with PWHT. Now the person who supervise welding of test coupons does he himself have to be certificated ASME code welder or can be welding instructor with...

Gr, What design engineer wanted is exactly what are you saying. “Painting all of the joints on the inside with highly penetrating oil, such as automobile spring oil, and carefully examining the outside of the joints for leakage”. Actually it was oil tank that he wanted to be tested for leakage...

Hi gr2vessels, it’s not my Boss its design Eng. Department that asks for that. Currently I’m writing painting procedure for surface coating of Hydro power Equipment. I’m working in China for a big multinational company and this Chinese design engineer insist I put in the procedure kerosene...

Dear All, Can somebody tell me what coal oil leakage test is and what is its purpose? Thank you.

Thank you very much stanweld. That was very helpful.

Hi guys, I need to know following: ASME IX WPQ Welder was qualified on a single coupon plate in 2G and 3G. Plate thickness was 40mm and material was P1. QW-403.27 says Max. T that welder can weld is that of the weld coupon. Does that mean that in 2G Max. T is 20mm and 3G is also 20mm or...