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  1. sethevans

    UCS-66(b) Reduction For SA-106 Gr. B

    To all, Would I be correct in assuming that by using SA-333 Gr. 6 pipe, SA-350 LF2 Class 1 flanges, and SA-420 WPL6 fittings for the vessel, then postweld heat treating the vessel, per UCS-68(c), I would get a 30 deg. F reduction which would put me @ -50 deg. F? This seems like the easiest way...
  2. sethevans

    UCS-66(b) Reduction For SA-106 Gr. B

    doct9960, If I'm using the calculations with the new MAWP correctly, my adjusted MDMT would be as follows: Case 4: MAWP = 395 psi tn = 0.375" x 0.875 = 0.328" Unadjusted MDMT = -20°F (Curve B) tr = MAWP x Ro / (S x E + 0.4 x MAWP) = 395 x 7 / (17100 x 0.85 + 0.4 x 395) = 0.188" Coincident ratio...
  3. sethevans

    UCS-66(b) Reduction For SA-106 Gr. B

    doct9960, I did the calculation by hand, and I'm still not getting by with it. UsingFig. UCS-66.2, I'm coming up with the following: tr E*/tn – c = (.2598)(.85)/(.312-.125) = .22083/.187 = 1.18 If I'm calculating this ratio correctly, SA-333 Gr.6 won't work either. Can someone confirm that my...
  4. sethevans

    UCS-66(b) Reduction For SA-106 Gr. B

    Hakkik, Thanks for responding. The thing that has me concerned is the fact that SA-106 Gr. B is not listed in Fig. UCS-66 under curves "B", "C", or "D". Therefore, you would have to use curve "A". Unless I am using Fig. UCS-66.2 incorrectly, I'm coming up with a ratio of .9078. Using Fig...
  5. sethevans

    UCS-66(b) Reduction For SA-106 Gr. B

    I have performed a calculation with Advanced Pressure Vessel software which says I can take the UCS-66(b) reduction for a lower MDMT. Is this correct (assuming 3/8" Tn and E* of 85%)? There are no calculations printed in order to verify that they are correct. The link is to the calculation sheet
  6. sethevans

    ASME PTC-18

    Does anyone have a link to a website that I can get a descriptive layout of an ASME Code hydro-test area. I've looked through ASME PTC-18-2002, and all it has is technical information and guidelines. The company I work for builds Fluid & Heat Recovery systems such as booster pump packages and...
  7. sethevans

    PED Code Filler Metals

    Hello everyone, I design pressure vessels to ASME Section VIII Div 1 code. I'm currently waiting for a design to be approved for European installation. This is the first time I have dealt with PED code. I've got to write a WPS for the PED inspector to witness, and the problem I'm having is...
  8. sethevans

    Re-Hydrotesting a Pressure Vessel

    unclesyd; the hole was bored through a boss(which was welded to the vessel) and the vessel wall. There were 4 holes drilled and tapped on top of the boss to accomidate the future flange. We had a flange machined for that boss specifically for hydro. doct9960; the flange is part of a camera...
  9. sethevans

    Re-Hydrotesting a Pressure Vessel

    metengr; Thanks for all your help. This information should put my customer at ease.
  10. sethevans

    Re-Hydrotesting a Pressure Vessel

    metengr; Thank you for your response. The vessel was stamped by an AI, and I understand that repairs are under the jurisdiction of the NBIC. My customer wants "a paragraph" from the code that says it's OK. The calculations do support the bigger opening. I gave them UG-99(a), and they are...
  11. sethevans

    Re-Hydrotesting a Pressure Vessel

    If anyone can help me find this in the ASME Sec. VIII Div. 1 Code, I would greatly appreciate it. I have a pressure vessel that was tested, and signed off. The vessel is now with our customer. Our customer supplied the calculations and drawings for fabrication. One of the openings in the...

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