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  1. yonderboy226

    vessel head crack

    Hello all, We have a vessel that has formed a crack in the head while in service. I am looking for some suggestions of where to start the root cause analysis. The crack is near the top of the head and runs between the surface welds of a nozzle support and a lifting lug. The welds (mig) are...
  2. yonderboy226

    ASME transfer valve - nozzle repositioning.

    You would definately need an "R" stamp in addition to a "U" stamp. We have a "U" with no "R" stamp and it was even tricky to correct an error on a nameplate.
  3. yonderboy226

    NACE MR0175 Welding Requirement for P1

    I was working with MR0175-2003, I didn't realize there was a MR0175/ISO15156. Does one imply the other? I couldn't find a requirement for C.E. in either of them, just specific hardness, manufacturing, and chemical requirements. My understanding is that if my PQR is P1 with a hardness test, and...
  4. yonderboy226

    NACE MR0175 Welding Requirement for P1

    Dear All, I appologize if this topic has been covered, I could not find anything specific in the forum. We have a project that requires ASME B31.3 piping and welding in accordance to NACE MR0175. The materials are all ASME XI P1 material group(SA106 Gr. B Pipe, SA105 Flanges, and SA234 WPB...

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