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  1. jstrom9

    Hot Tap Calculation

    @ jte That is what the calculation is for, you are correct. We did a 2" tap on the same header on a separate project. So we know that is safe to perform the tap with a 1" sockolet due to the smaller hole. We just have to provide supporting documentation for the client's records. We just used A...
  2. jstrom9

    Hot Tap Calculation

    I don't understand the comment about mixing values. I am calculating the maximum external pressure to not collapse the header. The method I am using has been used at my firm for decades. The oldest guy in my department suggested the same thing. Just use A = 0.1. Regards, Justin
  3. jstrom9

    Hot Tap Calculation

    I forgot to mention we are using 16" diameter STD WT. pipe with a 1" sockolet branch connection, which is where the L dimension comes from. Regards, Justin
  4. jstrom9

    Hot Tap Calculation

    There is a case for Do/t < 10 that allows you to calculate Factor A, however we are getting ~43 for our case. L=1.4375 in Do=16 in t=.373 in - thickness is from client UT readings L/Do = .0898 Do/t = 42.895
  5. jstrom9

    Hot Tap Calculation

    I am working on an external pressure calculation for a hot tap. The equation is from ASME Sec. VIII, Div. 1, UG-28. Ultimately, I need to get factor B from figure CS-2 in Sec. II, Part D, pg. 797. To get factor B I first need Factor A from figure G on pg. 795. To get factor A I have to enter the...
  6. jstrom9

    Pipe, Flanges, Forgings and Fittings for Sour Service (wet H2S)

    I was asked by a senior ME at my firm about some additional designations for piping materials. He asked me to look into it to see what these designations meant and if the suppliers we use are able to provide this specific material. What code or standard are these things covered by? The...

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