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  1. MechEngMSU

    B31.4 Induction Bend Minimum Thickness

    Hi, For a B31.4 design, do induction bends have the same pressure rating at the straight pipe they are made from or do you have to take into account wall thinning? (Assuming the pipe was not cold worked. Cold worked pipe heated to 600 degF is derated to 75%) I interpret B31.4 to mean the bend...
  2. MechEngMSU

    Coating of Stainless Steel Pipe

    The pipe is buried and needs to be coated based on the acidity of the soil
  3. MechEngMSU

    Coating of Stainless Steel Pipe

    I am working on a project in which we are running a 24 in pipe from a canal to a firewater pump basin. The client has requested stainless steel pipe. Based on our guidelines the pipe needs to be coated. Can someone recommend the best coating for this application. This is a pipeline company so...
  4. MechEngMSU

    Off-center Blind Flange Tap, B31.4

    Thanks for the responses. CSO is car-seal open, same thing as LO - locked open. it is horizontal with a 2" drain line sloping to it, a vent line going to the flare coming off the top and a 2" line going to a pump coming off the bottom. Off-center because the elevation of the drain line does not...
  5. MechEngMSU

    Off-center Blind Flange Tap, B31.4

    I am designing a short 24" class 150 piping section to ASME B31.4 with blind flanged ends that will be used for liquid hold-up of NGL test samples to be intermittently pumped backed into the process stream. (The client doesn't want an ASME vessel and this is open to the flare with CSO valves)...
  6. MechEngMSU

    Instrument Pipe Spool on API 650 tank

    On a recent project we added a sch 40 pipe spool with 150# flanges to accomodate a new pressure transmitter and oxygen analyzer to a spare 8 in nozzle on the top roof of a 150' diameter internal floating roof tank. The vessel has a design pressure of 3 in H2O. Does this pipe need to be...

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