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  1. Vessel-SA

    nozzle-head PWHT

    I sent the model to COMPRESS support and asked the same question. They agree that the weld thickness is greater than 1.5", but they use the nominal thickness of the head for the weld across the nozzle neck. Below is part of their response: I know you're trying to help, and I appreciate it...
  2. Vessel-SA

    nozzle-head PWHT

    Thank you,
  3. Vessel-SA

    nozzle-head PWHT

    but COMPRESS does not agree with 2.042" as the governing thickness and it uses 1.5" (the nominal head thickness) for PWHT check
  4. Vessel-SA

    nozzle-head PWHT

    Yeah, that's what I was referring to in my original post (though there was a typo — I meant UW-40(f)(5)(d)). but the question is whether 1.5" or 2.042" shall be considered as the governing thickness for PWHT
  5. Vessel-SA

    nozzle-head PWHT

    A drawing of what? I think I described everything needed. Please let me know if there's anything missing that you need to know to share your thoughts.
  6. Vessel-SA

    nozzle-head PWHT

    Hi everyone, I am designing a pressure vessel per ASME SEC VIII-1, there is a hillside (offset) nozzle on a head with a nominal thickness of 1.5". (SA-516 70). The vessel itself does not require PWHT. Per UG-40(f)(5)(d) states "in Figures UW-16.1 and UW-16.2, the thickness of the weld across...
  7. Vessel-SA

    PWHT for nonpressure parts to pressure parts - ASME Sec VIII Div I (2023)

    @Krausen, david339933. could you tell me what you think of what I said? I would appreciate it if anyone else could chime in too
  8. Vessel-SA

    PWHT for nonpressure parts to pressure parts - ASME Sec VIII Div I (2023)

    @david339933 No, I didn't miss that part. I didn't post that part simply because those exemptions are applicable whether or not the PWHT is due to service or another part of the code. I base this off of an ASME interpretation below (question 3). Although the interpretation is too old, and I am...
  9. Vessel-SA

    PWHT for nonpressure parts to pressure parts - ASME Sec VIII Div I (2023)

    @ Krausen the preaheat is required if the nominal thickness (weld thickness) is greater than 1.25", isn't it correct? so why would you think it is required?
  10. Vessel-SA

    PWHT for nonpressure parts to pressure parts - ASME Sec VIII Div I (2023)

    Thank you for your reply but what about the UW-40(f)(5)(-f) that states the nominal thickness is the thickness of the weld at the point of attachment when a non-pressure part is welded to a pressure part? The weld thickness in (1) is 0.75" and it is less than 1.5" which requires PWHT (if...
  11. Vessel-SA

    PWHT for nonpressure parts to pressure parts - ASME Sec VIII Div I (2023)

    @david339933 What do you mean?!
  12. Vessel-SA

    PWHT for nonpressure parts to pressure parts - ASME Sec VIII Div I (2023)

    Hi everyone, I am trying to figure out whether PWHT (Post Weld Heat Treatment) is required per code for non-pressure parts welded to pressure parts under the following conditions: The material is P1 Gr.1 for both the pressure part and non-pressure parts. PWHT is not required for service. 1)...
  13. Vessel-SA

    Nozzle area reinforcement per Appendix 46

    @Some Curious Guy, Thanks for your reply.
  14. Vessel-SA

    Nozzle area reinforcement per Appendix 46

    Hello everyone, I am using ASME SEC VIII Div.2 rules per appendix 46 div.1 for nozzle reinforcement calculations in a Div.1 vessel. The nozzle is a custom forging (stub end) with a heavy barrel thickness thicker than the neck. Appendix 46-3(f) states, "Weld joint details shall be in accordance...

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