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  1. rfitts

    PIPE FLEXIBILITY CALCULATIONS B31.3 CHAPT II PART 5

    Occasionally we are requested to fabricate a header system. Typically the header system will be mounted horizontally. It will have a main feed pipe with several branch pipes that are perpendicular to the main feed pipe. The branch pipes will be connected to the main pipe by using a branch...
  2. rfitts

    Hydro test per B31.3

    We are being contracted to fabricate an austenitic(316) pipe in pipe lance feeding a dual liquid nozzle(air and steam). Process pressures are 80psi. 80 psi in the inner pipe and 80 psi in the outer pipe. Lance will be operated in a duct exposed to 1400°F gas temp. Typically we receive only...
  3. rfitts

    A36 to A36 using 309L

    I need to weld 1/2" a36 to 1/2" a36 which will eventually be overlayed one side with hard face. The customers spec is tig root pass with 309l and fill and cap with 309l. Why this process....should the weld be purged? Any help with generating a WPS? Bob
  4. rfitts

    B31.3 calcualtions

    I have a 1" 316H pipe w/alloy 625 bellow in 2" 316H outer pipe..it is a spray lance. There is a class 300 flange welded to the outside pipe to be able to get it into a 1150°F duct. It is a B31.3 application also requiring a CRN. What are the minimum calculations that will be required for this...
  5. rfitts

    Nickel overlay on stainless pipe

    I need some help in predicting shrinkage of pipe after it has been overlayed with nickel. I have a 30" long piece of 6" sch80 304ss pipe that will be overlayed with nickel. Any help will be appreciated. Bob
  6. rfitts

    Nickel overlay on stainless pipe

    I need some help in predicting shrinkage of pipe that has been clad with nickel. I have a 30" piece of 6" sch80 304ss pipe. If it is overlayed with nickel how much will it shrink? Bob
  7. rfitts

    SILICON CARBIDE NITRIDE

    I need to determine acceptable torque limits for the silicon carbide nozzles that we produce. They range in size from 4" up to a 16" nozzle(300lbs). The flanges have the same number of holes and the same bolt holes as Class 150 flanges. Bob
  8. rfitts

    water hydraulic cylinder

    Does anyone have any experience with using a hydraulic cylinder with water? I am thinking of using a double acting cylinder as a spray bar oscillator. This application will require adjustable stroke and adjustable speed. Thanks in advance for any information. Bob

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