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...
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...
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
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...
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...
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...
