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  1. quatle

    Pcm of piping material is higher Pcm of PQR qualified

    hello everyone I have one question is: when I qualify a PQR carbon steel A106 Gr.B pipe to pipe, the Pcm calculated in mill certificate is 0.245%. however, Pcm carbon (A106Gr.B) piping material show on mill certificate for fabrication in my project is 0.255%, what we can do in this case.
  2. quatle

    PWHT for Branch connection weld

    Hello everybody as subject, I have many joints Olet (weldolet/Nipoflange) are seft reinforement more than 25mm welded to pipe run 10''SCH80(15.09mm) & 12"SCH80(17.48). As per ASME B31.3 2014 defined that Tm+Tc>25mm in FIG.328.5.4F is need to PWHT or preheat 95deg without PWHT. but currently we...
  3. quatle

    NDT before or after PWHT

    Hello everybody any ASME code don't mentioned NDT after or before PWHT, anyone can explain for me understand why?

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