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  1. zcdr01

    GB150 Code

    You would find a fair amount of similarities between GB 150 and SC VIII-1. You would find figures and sketches in GB 150 that look like they were taken from SC VIII-1. There are however, some fundamental differences. Materials are one; GB 150 has its own allowable stress tables but they do...
  2. zcdr01

    Flange materials - B16.5

    If the flange does not employ a hub (for example, sketch 3a of Fig 2-4 of Section VIII, Div 1) you can use plate. If the flange does employ a hub, see Appendix 2, paragraph 2-2(d) for more specific requirements.
  3. zcdr01

    Code Violations

    Such a program would be useful. Here are some thoughts... 1. ASME policy is not to approve or endorse specific designs or products, so it is correct that you could not get approval even if you wanted. 2. Unless the flange falls within the scope of Appendix 2, paragraph 2-10 (Noncircular...
  4. zcdr01

    Hydrostatic Testing

    "The interesting question would be why did ASME move from X1.5 --> X1.3 factor for hydrostatic pressure against the design pressure and yet did not relax the same testing condition for pipelines designed against B31.3/4/8" The basis of the revised test factor has to do with the change...
  5. zcdr01

    SA-105 vs. SA-266 Cl. 2

    The 2001 Edition of ASME Section II, Part D was revised such that SA-266-2 is permitted to a maximum temperature of 1000 deg F for Section VIII-1 construction.
  6. zcdr01

    Large Standard Flanges

    Yes, ASME B16.47 is almost always used for flanges that exceed the ASME B16.5 size range. In general, one would use Series B, which is equivalent to the old API 605 bolting dimensions. However, if you know that a flanged valve is going to be bolted directly to one of the vessel nozzles, you...
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