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Recent content by AarVee

  1. AarVee

    Nameplate MAWP Less than Design Pressure

    Excellent suggestion.
  2. AarVee

    Nameplate MAWP Less than Design Pressure

    SNORGY, Without getting into details, this large vessel must be assembled and tested on site. You echo my own thoughts regarding UT and RT, but I was thinking the "restricted distance" should be 500 ft and everyone should be inside cars with the engines running. Back to my original quandry...
  3. AarVee

    Nameplate MAWP Less than Design Pressure

    Thank you all for your input. This is a complex issue to me because it is a tall vessel that must be hydrotested vertically due to logistic considerations. (40 psi static head during hydro on a vessel intended to operate empty at 1 atm.) I will look into Snorgy's comment, but will also bear...
  4. AarVee

    Nameplate MAWP Less than Design Pressure

    Our customer needs an SA-516-70 pressure vessel that will operate at slightly below 1 atm. The original plan was to rate the vessel for 1 atm, and avoid needing to Code-stamp. But now we find that the vessel must be pressurized with steam at 2 atm for 48 hours in order to cure the rubber lining...
  5. AarVee

    Impact Test SA-182-F51 Flanges

    Thanks again for sharing your thoughts and experience. It has been very helpful.
  6. AarVee

    Impact Test SA-182-F51 Flanges

    Thanks all, my understanding of the issues considered under ASME VIII-1 is becoming clearer: The MTR for the duplex flanges should include documentation that testing has been performed to minus45degC per UHA-51(a)/UG-84(e)(2) on three specimens from each lot of (20) parts. Testing is to be...
  7. AarVee

    Impact Test SA-182-F51 Flanges

    My supplier is designing a vessel with duplex flanges for -45degC under ASME VIII-1. Per UHA-51, these SA-182-F51 flanges must be impact tested. What sort of documentation should I expect from the supplier to prove that these forged flanges are properly tested? Are sample flanges selected from...
  8. AarVee

    SB 725? Pipe

    SB-165 is certainly my preference. But I can only argue my case and let others make the decision. I just want to make sure I haven't overlooked anything. The vendor says 725 is OK, the money people see it's cheaper. It's up to me to present a valid arguement regarding whether 725 can or cannot...
  9. AarVee

    SB 725? Pipe

    I am looking into the use of N04400 pipe for a Sect VIII Div 1 Vessel. My internet searches have turned up references to SB 725 pipe, but this material is not listed in Section II. Have I missed an Interpretation that permits the use of B 725 pipe in Code vessels? Or is it just remotely possible...
  10. AarVee

    UCS-66 for B16.5

    Thanks guys. This is very helpful.
  11. AarVee

    UCS-66 for B16.5

    According to UCS-66(c), impact testing is not required for ASME B16.5 ferritic steel flanges down to -20F. (I understand "ferritic steel" to include only carbon steel like SA-105, SA-350. Correct me if I'm wrong.) To get a colder MDMT, one can employ UCS-66(b)(1)(b). My question is: Are there...
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