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  1. Deccocwb

    Weld surface finish / ASME B31.3 item 341.3.2 / Severe Cyclic Service

    Mk3223, I agree with you if I flush the weld reinforcement. I agree the roughness could be a stress concentrator in any material aplied in cyclic condition, but when you put a weld in the middle, the roughness became less critical than the weld profile (in as welded condition). Considering a...
  2. Deccocwb

    Weld surface finish / ASME B31.3 item 341.3.2 / Severe Cyclic Service

    According to ASME B31.3 table 341.3.1, severe cyclic service piping welds have surface finish criteria (roughness) of 12,5um Ra. Somebody experienced measuring this roughness over weld bead, once there´s a numerical criteria? Somebody knows the influence of roughness in fatigue life? What if...
  3. Deccocwb

    Production test for high pressure piping acc to ASME B31.3

    Hi Dekdee, thanks for your reply, just another question: In table K323.3.1 there are two parts: "Tests on Materials" and "Tests on Welds in Fabrication or Assembly", this second part is only applicable to WPS qualification? Have nothing to do with Production Tests? PS.: My original doubt came...
  4. Deccocwb

    Production test for high pressure piping acc to ASME B31.3

    I need some help regarding the table K323.3.1(impact testing requirements) of ASME B31.3 (2012): According to that table it is required to perform PRODUCTION TEST (impact test) for each WPS / type of electrode / each range: 1/2T to T+6mm(1/4"). If impact test are performed as part of WPS...
  5. Deccocwb

    USING FCAW PROCESS FOR SS OVERLAY IN A CLAD VESSEL

    Hi all, I agree with brimstoner, you can weld with FCAW to restore of clad, but you need to keep in mind that restoration must aquire the same corrosion resistance of the clad plate. That means your FCAW deposit must result the same composition of clad plate in 3mm depth. To do this you need to...
  6. Deccocwb

    Gasket used in hydrotest

    Some gaskets specified in mechanical design is very expensive and I´m looking for a low cost solution for gaskets to be used in ordinary hydrotest for ASME VIII div 1 vessels. Could I use a gasket, different from that specified in mechanical design, only to perform the Hydrotest? I think, if I...

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