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  1. mechengineer

    Does MDMT can be lower than the impact test temperature indicated in AMSE code?

    Please read and understand the original post and Table 3 carefully and correctly. The discusssion is for grade IV of AS-765 only, not other grade in Table 3 as you mentioned
  2. mechengineer

    Does MDMT can be lower than the impact test temperature indicated in AMSE code?

    Hi material and inspection experts, SA-765 grade IV, impact test temperature is -30 deg.C in Tabel 3, ASME II, part A. The vessel manufacturer told us that as per 6.6.1, they can do impact test for -46 deg.C. <6.1.1 When agreed upon between the purchaser and the producer and specified on the...
  3. mechengineer

    Studding Flange Design as per Code

    Hi Code experts, Does ASME VIII-1, Appedix 2 provide the studding flange deisgn method/calculation. Thanks.
  4. mechengineer

    Variant of reverse flange design

    @SnTMan , RTJ metal ring gasket used.:)
  5. mechengineer

    Variant of reverse flange design

    @TG4, Yes, ASME VIII does not provie studding flange calculation. Currently, <Pressure Vessel Design mannual> 4th Ed. by Moss has been used for studding flange design. I’m happy to see you here again. Let me take this opportunity to share the current status on heat exchanger flange design by...
  6. mechengineer

    Variant of reverse flange design

    @SnTMan , Because of the different shape of flanges, some simplifications of geometry shape can be made to cater to the exised formula, that may be acceptable or derive the formula by hand-calculation. Yes, DP=247 MPa. Design by VIII-2. Appendix-2 is appliclbe for VIII-2. It may remove to VIII-2...
  7. mechengineer

    Variant of reverse flange design

    @SnTMan , My requst is in beteewn reverse flange and studding flange to minimize the flange size and weight. FPSO project, it is very critical space limit. I will try to go to studding flange if there is not calculation reference for my request. It is not possible to install the removable...
  8. mechengineer

    Variant of reverse flange design

    Hi dear PV experts, Due to the small channel ID of 465 mm, we need to use a variation of the reverse flange design. Can ASME VIII-1, Appendix 2-13 for Reverse Flanges be applied to this variant? If anyone has experience designing this type of reverse flange variation, I would appreciate your...
  9. mechengineer

    Design liquid velocity recommended by TEMA

    Thanks, geogeverghese.
  10. mechengineer

    Design liquid velocity recommended by TEMA

    The table is from HTRI reports for evey cases. Regardign the high velocity, if vibration is not an issue at the high speed, then the service/design life of the S31803 tube at the high speeds (erosion) may only be the concern point. Am I right? Thanks
  11. mechengineer

    Design liquid velocity recommended by TEMA

    Thanks for all inputs. The real case as below. This thermal design is done by client (user).
  12. mechengineer

    Design liquid velocity recommended by TEMA

    Hi Experts in shell & tube heat exchanger thermal design, Kindly advise the design velocity for fluid (like cruel oil) recommended from TEMA and which para. is in TEMA. Thanks
  13. mechengineer

    Galvanic Corrosion on Flanges Connection.

    @Sjones, Thansks for sharing. it's very usefully information from reaserch and study.
  14. mechengineer

    Galvanic Corrosion on Flanges Connection.

    The threads replated to correcsion for understanding https://www.eng-tips.com/viewthread.cfm?qid=220853#post https://www.eng-tips.com/viewthread.cfm?qid=510967
  15. mechengineer

    Galvanic Corrosion on Flanges Connection.

    @Edtainless, I tend to your point of view. 1. The outer ring (CS)with SS falnge and outer ring (SS) with CS flange very localized to a lint of corrosion. 2. At the sealing surface (the area contacted by winding material), winding material (SS)+ graphite filter with CS flange at high compressed...
  16. mechengineer

    Galvanic Corrosion on Flanges Connection.

    Dear Corrosion Experts, A pair of flanges connection: one is SA-105 and another is SA-182F316L. Spiral Wound Gasket, wounding material of SS316L winding and graphite filter. Outer ring is CS and inner ring is SS316L. Q1, Is there the galvanic corrosion between the CS flange and SS flange? Q2...
  17. mechengineer

    U2 Stamped and CE Approval

    @IdanPV, totally agree.
  18. mechengineer

    U2 Stamped and CE Approval

    @Idan and XL83NL, Thanks for inputs. Now my understanding is that whether U2 stamp and CE to be required/applied depends on user only.
  19. mechengineer

    U2 Stamped and CE Approval

    Hi, Are U2 stamped and CE (Certified Engineer)approval mandatory by code for pressure vessel designed/CONSTRUCTION by ASME VIII-2? Thanks,
  20. mechengineer

    Strength weld joint between SA-266Gr2 of TS and SA-312TP316L of tubes

    Dear weld experts, May apply strength weld to the joint between SA-266Gr2 of tube sheet and SA-312TP316L of tubes? Thanks

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