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  1. dgrande

    What is the required hydro test pressure for vessels going to China?

    My company does a lot of work for Chinese Installations & I just headed-up the Chinese Audit for the renewal of our Chinese Manufacturing License. There are a few requirements that we need to bring into play from GB-150, such as chemical requirements for materials and impact testing...
  2. dgrande

    Equivilant ASTM bar spec to A516?

    I would go with the A/SA-36 as well, but if you are looking for equivalent strength, go with the 675.
  3. dgrande

    Reporting Foundation Load - Horizontal Vessels

    I would also be interested in a feature that translates nozzle loadings to the foundation & checks the local stresses created at the saddle-to-shell juncture as a reult of the combined loadings of wind/seismic/piping. I currently have to go through quite a process to take this into consideration.
  4. dgrande

    MAWP Limiting Component

    This is good stuff! I'm a designer & fabricator of highly specified customer vessels & heat exchangers. We deal with a lot of customer specifications. I pretty much take the approach of "If it's in there, I will meet it. If it's not, ...." For a fabricator, part of the engineer's job is to...
  5. dgrande

    Gaskets & NACE MR0175

    vesselguy, I believe that you are correct. I was just looking for some confirmation.
  6. dgrande

    Gaskets & NACE MR0175

    For RTJ gaskets, the hardness will be easy to verify. The problem is that if I apply NACE to RTJ gaskets, then I will have to apply it to metal jacketed gaskets & then I will not be able to verify hardness values.
  7. dgrande

    Gaskets & NACE MR0175

    I am designing building an ASME Code Pressure Vessel per MR0175. The vessel is going to have solid metal RTJ type gaskets used for a Manway Closure. These gaskets are either going to be Soft Iron or Gr. 304SS. The question is: Do these gaskets need to meet MR0175? I realize that they will be...
  8. dgrande

    design pressure

    Actually, I agree with desertfox. The Design Pressure is the Pressure that the vessel is to be designed to. The MAWP cannot be determined until the components of that vessel have geometry. After the unit has been completely designed the MAWP can be determined or, per UG-99(b) "The MAWP may be...
  9. dgrande

    Material Not Listed In Table Y-1??????

    I'm currently designing a Shell & Tube heat exchanger with SB-111 C68700 Tubes. In Section II-D, Table 1B, (pg. 182) the material is listed as being allowable for Section VIII, Div. 1 units up to a design temperature of 450°F. However, the material is not listed in Table Y-1 & Compress asignes...
  10. dgrande

    Material Not Listed In Table Y-1??????

    I'm currently designing a Shell & Tube heat exchanger with SB-111 C68700 Tubes. In Section II-D, Table 1B, (pg. 182) the material is listed as being allowable for Section VIII, Div. 1 units up to a design temperature of 450°F. However, the material is not listed in Table Y-1 & Compress asignes...
  11. dgrande

    Butt Caps used as Heads

    I model pipe caps as 2:1 elliptical heads. You do have to keep in mind that the pipe caps have a 12-1/2% pipe tolerance though.
  12. dgrande

    ASME Div 2 Heat Exchanger -Min. Tube Wall Thickness

    I've looked through Div. 2 & have not been able to find where an exception to the minimum thickness requirement is.
  13. dgrande

    Heat Exchanger Design Training Class

    Great. I'm looking forward to the step-by-step review of Part UHX. Thanks Tom.
  14. dgrande

    Section VIII, Division 2 Tubesheets

    My company just received a job for some Shell & Tube heat exchangers that are to be designed per Section VIII, Div. 2. We have designed & built many vessels per Div. 2, but these will be our first heat exchangers. I was looking in Div. 2 & came across Mandatory Appendix 4, Article 4-9 for...
  15. dgrande

    Tubesheets per Section VIII, Division 2

    My company just received a job for some Shell & Tube heat exchangers that are to be designed per Section VIII, Div. 2. We have designed & built many vessels per Div. 2, but these will be our first heat exchangers. We currently subscribe to Compress' Div. 2 & Heat Exchanger software packages. I...
  16. dgrande

    Interpretation: VII-1-04-61 Subject: UHX-10(a)

    This is only my thinking, but I believe that, in time, ASME will expand upon Part UHX to be more applicabe to a variety of geometries. For now, I think that it is a work in progress. Unfortunately for us, it's a pain in the arse to figure out where to apply it & where not to.
  17. dgrande

    Interpretation: VII-1-04-61 Subject: UHX-10(a)

    Agreed. Para. UHX-10 is new & the majority of my heat exchanger work will be exempted
  18. dgrande

    Interpretation: VII-1-04-61 Subject: UHX-10(a)

    I believe that you are interpreting both of these items correctly.
  19. dgrande

    Support C.A. ?

    I run across this situation quite often. Currently, I simply calculate my supports 1/16" thinner then what I intend to draw/fabricate them. To make the matter clear to my drafters/customers, I put a note on my calculation coversheet stating what I did.
  20. dgrande

    Sizing Tube-to-Tubesheet Welds

    Yes Tom. It is Don. I will send an e-mail directly to Codeware's support address. Unclesyd, It is not a strength calculation that I am looking for. Part UHX of the Code directs me to UW-20.6 for the physical sizing of the weld regardless of required pull strength resistance. Thanks for your...

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