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  • Users: kjf1
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  1. kjf1

    MDMT for 430F Stainless Steel

    Does anyone know where I could find any published data on the minimum design metal temperature (MDMT) for 430F stainless steel, or at least some impact testing data for this material at low temperatures (-70C)? Thanks
  2. kjf1

    B31.3 or Sec. VIII Div. 1?

    The following is an exerpt from ASME VIII Div. 1 code: "U-1(c)(2) Based on the Committee's consideration, the following classes of vessels are not included in the scope of this Division... U-1(f) piping components, such as pipe, flanges, bolting, gaskets, valves, expansion joints...
  3. kjf1

    Compressed Gas Heat Exchanger

    I am attempting to solve a "simple" heat transfer problem, but I am having some difficulty. I am trying to use hot natural gas from the discharge of a compressor to preheat gas being fed into a regulator to prevent the regulator from freezing (the gas dewpoint is -40F). I want to...
  4. kjf1

    High Pressure H2 - Material Compatibilities

    Does anyone know of a good reputable source of information on material compatibilities for high pressure (6500 psig) hydrogen? I know there are problems with hydrogen embrittlement of some steels, and that some elastomers are problematic due to the small size of the H2 molecule, but I haven't...
  5. kjf1

    Tapped Hole in B16.5 Blind Flange

    Is there any reference where I can determine what the change (if any) would be to the listed pressure rating of a B16.5 blind flange by tapping a hole in it (of NPS equal to or smaller than the NPS of the flange)? I'd rather not go through the entire calculation per Sec. VIII Div. 1 Appendix 2...
  6. kjf1

    B31.3 Nozzle Calculations through B16.9 Pipe Cap

    I am doing a design which requires a 3" Sch 40 nozzle to extend through (along the axis)of an 8" Sch 40 B16.9 Pipe Cap. I understand the branch calculations in B31.3 for run pipe, but how do I apply them to a pipe cap? Also, I want to install a 1/4" coupling as a drain in the...

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