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Recent content by msutherland

  1. msutherland

    Tubesheet Flatness Requirement

    Thanks for the response innovation2. We actually went through a 3A audit and have our marking permission to 3A stamp this design.
  2. msutherland

    Tubesheet Flatness Requirement

    SnTMan, The intent is not to completely seal the pass rib to the tubesheet face as it would be sealed with an elastomer in other designs. All of our standard designs which range in diameter from 3” up to 20” are this design with no elastomer to act as a seal between the pass rib and tubesheet...
  3. msutherland

    Tubesheet Flatness Requirement

    Does anyone know what the recommended tubesheet flatness spec is for sanitary shell and tube heat exchangers where the bonnet pass rib does not have an actual seal but the rib face is metal to metal seal to the tubesheet face in multi-pass units? I contacted TEMA but since that isn't listed in...
  4. msutherland

    CE Welder Prolongation

    XL83NL, I think what they are indicating is that in QW-322.2(b) it indicates that for small diameter pipe or tube that the total number of circumferences need not exceed four (pieces). Just out of curiosity what Inspection Agency do you use? Thanks
  5. msutherland

    CE Welder Prolongation

    Thank You Kiwi2671 & XL83NL for your responses. Let me also note that our original test was using (4) pieces of 3/8" x .083" tube to meet the requirements of QW-304.1 to get the minimum 6" inches of weld for testing. We are being told we need to use (4) of these samples for (2) different...
  6. msutherland

    CE Welder Prolongation

    According to EN287-1 a welders qualifications need to be prolonged every 2 years by testing of two samples within a 6 month period prior to their expiry date. My question is if the qualification originally required the testing of 4 pipe samples because of their diameter and per the requirements...
  7. msutherland

    Nuclear N Stamp

    We are looking into the possiblity of obtaining our N stamp and wanted to see if others could give me some feedback on a few items. We currently have our standard U, UM & R stamps, CE mark vessels and have our China manufacturing license. Our current Quality system is ISO 9001 compliant, not...
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