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Recent content by stephenbell50

  1. stephenbell50

    using of sittfener to adjust for out of tolerance in a tank API 650

    JStephen, Where can i find that interpretation? i found the document "technical inquiries for API standard 650" online from the api committee website but when i search for that one it doesn't show up there.
  2. stephenbell50

    NBIC Part 3 PWHT

    I just noticed something strange between the 2013 NBIC Part 3 and 2015 NBIC Part 3 for the equation in section 2.5.2 2013 edition: HB = SB + 4*sqrt(R + t) 2015 edition HB = SB + 4*sqrt(R * t) there is a huge difference between these equations. I have seen metengr posts on this section of...
  3. stephenbell50

    NBIC Part 3 PWHT

    So R should be 0.9*D where D is the ID of the vessel/head. The spherical radius of a 2:1 semi ellip is 0.9*D... Next question in that same equation HB = SB + 4*sqrt(R*t): Is the SB in that equation just t or 2" (whichever is less) or is it supposed to be the nozzle OD + 2 times t or 2"? I...
  4. stephenbell50

    NBIC Part 3 PWHT

    For a nozzle in an ASME Sec. VIII Div. 1 2:1 semi ellip. head: I have a question about how "R" is defined in the Heating Band definition in section 2.5.2 of NBIC 2015 Part 3 Heating Band (HB) – this is the region that encompasses the application of heat for PWHT and is defined in length by the...
  5. stephenbell50

    Foundation bearing stress calculation

    I am seeing Compress run two different types of calculations for foundation bearing stress (f_c). It is the same vessel and I'm running two separate operating loads (a separate calc for each load). The heavier operating load (2,240,000 kg) causes Compress to run the equation for f_c as...

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