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  1. pjdpipingeng

    Pressure test requirements for B31.8 in-service piping

    LittleInch, Sorry for the confusion. The 315 bar (4569 psi) is the calculated hoop stress (Sh = PD / 2t) at an operating pressure of 39 bar (P = 566 psi). Maybe I'm not doing a correct comparison, which is where the confusion that I talked about in my last post is coming from. From what I...
  2. pjdpipingeng

    Pressure test requirements for B31.8 in-service piping

    Thank you LittleInch and DekDee for your responses. LittleInch - While you are correct that you wouldn't normally divide a line up into 2 different codes, the way that the pipelines are divided up here in Saudi is basically what DekDee stated - All aboveground and underground pipelines...
  3. pjdpipingeng

    Pressure test requirements for B31.8 in-service piping

    I have a question concerning the pressure test requirements, particularly with the required test pressure, for a 3" Sch 40 gas pipe. Some history: As already mentioned, the pipe is a 3" Sch 40 API 5L Gr B seamless pipe transporting methane gas. The line has been in service for about 3 years...

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