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  1. wsmith22

    Proposed Allowable Stresses Based on Guaranteed Strength Properties

    It is a standard pressure vessel specification from a petroleum company. The beginning of the specifications states that allowable stresses are to be per ASME Section IID. We will ask for clarification. Thank you.
  2. wsmith22

    Proposed Allowable Stresses Based on Guaranteed Strength Properties

    A customer specification has special requirements when using proposed allowable stresses based on guaranteed strength properties. I have not seen this before. We are quoting a ASME Section VIII, Div.1 vessel. What does this refer to? Thank you.
  3. wsmith22

    Codeware COMPRESSS Nozzle FEA Error

    I was getting the same issue. I had to reduce my loading.
  4. wsmith22

    Rectangular Flat Face Flange with Metal to Metal Contact Outside Bolt Circle

    Thank you. Looks like the rectangular flange with full face gasket procedure can be modified to work.
  5. wsmith22

    Rectangular Flat Face Flange with Metal to Metal Contact Outside Bolt Circle

    In order to size the bolts for this type of flange, the contact force between the flanges is required. Since this is a non-standard rectangular flange, the calculation methods in Appendix Y are not applicable. Once the bolting is determined, I will run an FEA. Can anyone provide some insight...
  6. wsmith22

    PCC-1 for Self energized Gaskets

    Sorry if already posted but I do not see where the required bolt torque for Appendix 2 flanges using self energized gaskets (o-ring in this case) has been discussed. Per PCC-1, the target gasket stress is 0 or very low. Therefore, the simple approach is not valid. For the joint compound...
  7. wsmith22

    NACE MR0103-2015

    Thank you Steve. Very helpful.
  8. wsmith22

    NACE MR0103-2015

    I am reviewing NACE MR0103-2015. 13.1.1 specifies the heat treatment conditions of carbon steel materials. Can someone verify my assumptions are correct or point me to a website or document that can verify these assumptions? Searching the forum and other websites, I assume the following...
  9. wsmith22

    SA-193 B8 Cl.2 & SA-193 B8M Cl.2 Bolts - UHA-51(c)(1) & UHA-51(d)(1)(a)

    Are these bolts impact test exempt per UHA-51(d)(1)(a) to -320 deg F? I assume the bolts are thermally treated above 1650 deg F per UHA-51(c)(1) even though the material specification does not give a solution anneal temperature. I have asked for our bolt supplier to provide more information...
  10. wsmith22

    PMI Testing with Portable XRF Tester

    We have a customer asking for PMI testing to verify 316/316L stainless steel materials in a pressure vessel with the ASME SA specification limits. They want to include the PMI tester accuracy in the results. For example, if the accuracy of the tester is +/-0.1 for Cr and the SA specification...
  11. wsmith22

    AS4343 Hazard Level

    For the modification of PV values, is it possible for the equipment be located in a facility that is under control of the major hazard facility legislation per 2.2.5 (a)(iii) and also be located in an area where employees are not permanently stationed but may periodically visit for servicing per...
  12. wsmith22

    RT-2 or RT-4 Marking

    A seamless pipe shell welded to a seamless pipe cap on one end and an slip on flange on the other end. Spot RT is performed on the shell/pipe cap weld seam per UW-11(A)(5)(-b) in order to use a joint efficiency of 1.0 on the shell for the circumferential stress calculation. Since the shell can...
  13. wsmith22

    A-105 Flanges Normalized and Produced to Fine Grain Practice

    Yes, it is confusing because Figure UCS-66 General Note (d)(2): fine grain practice is defined as the procedure necessary to obtain a fine austenitic grain size as described in SA-20.
  14. wsmith22

    A-105 Flanges Normalized and Produced to Fine Grain Practice

    Are these flanges readily available or would it be better to use SA-350 LF2 material? Our flange distributors cannot locate flanges that meet the fine grain practice requirement per SA-20. Thank you.
  15. wsmith22

    Ring Joint Gaskets Using Appendix 2 Calculations

    Ok, I'm not getting much help from the gasket manufacturer. They will give a total seating load for the c ring gasket. It looks like I should be able to replace Hp with this value in the calculation of Wm1. Does this make sense? For gasket seating, Wm2 will not govern so the minimum design...
  16. wsmith22

    Ring Joint Gaskets Using Appendix 2 Calculations

    No, it is an Appendix 2 flange with an o-ring style groove. The seal compression is approx. 0.6 mm nominal.
  17. wsmith22

    Ring Joint Gaskets Using Appendix 2 Calculations

    I am having difficulty getting the m and y values. Technetics gives equivalent formulas for the operating load (Wm2 = Fj = π* Dj * Y2 = π * Dj * Y2) and minimum service load (Hp = Fm = 2* b* π * G * m * P = Ym2 = Y2 * (P/Puθ). For a Codeware Compress calculation, does it make sense to choose a...
  18. wsmith22

    Ring Joint Gaskets Using Appendix 2 Calculations

    Does anyone have any background designing an ASME Section VIII, Div.1 Appendix 2 flange using a metal C-ring or a Helicoflex type gasket? Per the following thread, Garlock gave user JJCist a m and y value for a Helicoflex gasket. https://www.eng-tips.com/viewthread.cfm?qid=183863 However...
  19. wsmith22

    Ring Joint Gaskets Using Appendix 2 Calculations

    How do I determine the minimum width of a ring joint gasket to be used in a ASME Section VIII, Div.1 flange calculation? Typically, I would match the ring size to the pressure/temperature rating of a B16.5 flange. However, in this case, the pressure and temperature exceeds the 2500# flange...
  20. wsmith22

    EN 10204 3.2 MTR's

    The problem is we only require small quantities of raw materials. i.e. one piece of 2" thk SA-516 70 plate, 8" of 1" sch.40 pipe, (4) 5/8"-11 stud bolts, etc.

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