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  • Users: Deccocwb
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  1. 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...
  2. 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...
  3. 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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