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  1. nutriarat

    VIII div 1 Appendix 2 required bolt load

    I'm trying to estimate an initial bolt preload for a body flange. Can I use the value for Wm2 in Appendix 2 to back calculate the necessary bolt torque to give the required preload at ambient conditions? What general approach do you guys follow when estimating the required bolt preload for a...
  2. nutriarat

    What is the reasoning behind UG-45 in Sect VIII, Div 1

    Can someone explain the purpose of the UG-45 for min wall thickness of nozzle necks? If a nozzle opening has sufficient reinforcement and the nozzle neck is thick enough for the service pressure then why is UG-45 necessary?
  3. nutriarat

    repair options for coded pressure vessel

    Thanks metengr, It turns out that I was able to lower the tmin. Can you tell me where in the NBIC weld overlay requirements for wasted areas are discussed. Section RD-2030 mentions buildup of wasted areas, but I do not see where the repair has to be performed on the side of the vessel with...
  4. nutriarat

    repair options for coded pressure vessel

    What repair techniques are acceptable to repair corroded areas in the shell and head of a pressure vessel? Are weld metal buildup and/or flush patches basically the only two options?
  5. nutriarat

    inhouse pressure vessel repairs

    we are in louisiana
  6. nutriarat

    Non-seal Pump

    Are you working with a mag-drive or a canned motor pump? Power monitors are common on mag-drives, they work by monitoring the electric current drawn by the motor, too high or too low and the monitor trips the pump. Mag-drives can be very reliable but they do need some safeguards.
  7. nutriarat

    inhouse pressure vessel repairs

    What is required for an owner-user to make their own inhouse repairs in accordance with the NBIC? Does this require an owner-user accreditation and the oversight of an AI?

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