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...
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...
