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Recent content by kevtsg

  1. kevtsg

    Blank thickness calc - RTJ Flanges

    jt, Thanks for the reply. The calculation is merely to determine the required pressure thickness, eg tm=sqrt(3P/16SE) + c. The calc is the same for both raised face and RTJ flanges. However in this calc he has added the thickness of the grooves at both sides. This is what is misleading since...
  2. kevtsg

    Blank thickness calc - RTJ Flanges

    Hi all, I am reoriginating an electronic calc for blanks as per B31.3 para 304.5.3. Something that has struck me regarding the calc that I have to work with is that the original author made an allowance for 2x the groove depth on RTJ flanges. Obviously this is giving a pretty large safety...
  3. kevtsg

    Piping Wall thickness - retirement thickness

    Can anyone advise me on the correct method for determining the minimum wall thickness required for mechanical strength - the retirement thickness - in ASME B31.3 calculations? Generally this varies from under 1mm to 5mm, increasing in line with the size of pipe but these values tend to vary...
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