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  1. Geoff13

    Plate marking as per SA-480

    I hate to repeat myself, but why are you expecting ASME marking on an AISI material? If this photo is of an ASME registered vessel / piping / etc. and that's the only marking on the plate then you've got a big problem. --------------------------------------- I've been designing large...
  2. Geoff13

    Plate marking as per SA-480

    Here's some info I found by Googling. If what I say below is wrong that's my poor Googling! Maybe you could try Google? The AISI manual listed chemistry only. They may have included "typical" physical properties, but testing was not required. AISI no longer publishes this manual, however...
  3. Geoff13

    Appendix 2 Figure 2-4(11) integral

    Figure 2-4(11) refers to Figure UW-13.2 sketches [m] and [n] for full-penetration. You PDF is exactly sketch [n]. Assuming you match the dimensions in sketch [n], and do a back-chipped full-pen weld, then it is an integral flange. Edited to change (n) into [n] as intended.
  4. Geoff13

    Plate marking as per SA-480

    If the plate is only marked as being AISI, why are you looking for SA-240/SA-480 markings?
  5. Geoff13

    Can Service Pressure Exceed Design Pressure?

    I believe ASME Section VIII Division 1 clause UG-21 makes it clear that the specified design pressure must be greater than any possible operating condition.
  6. Geoff13

    Storage tank ?pressure dome? - just curious

    The logo is Irving Oil, a Canadian oil company...
  7. Geoff13

    ASME VIII-1 Nozzle Spacing Clash

    I would not be using individual reinforcing plates on each nozzle. I would use a thickened insert (try 2 times tshell) or perhaps a full thickened ring though I'm not sure where the large nozzle on the far side is. I have never used PV Elite so I don't know how to specify an insert like this...
  8. Geoff13

    Thickness Hub at the Small End, g0

    For a loose-type flange g0 is the"thickness of hub at small end" as defined in clause 2-3, so neither of the dimensions in your sketch. See Figure 2-4 Detail (1) or (2). The neck thickness is only considered for optional or integral flanges.
  9. Geoff13

    Flat Plate Bending Weld Stress

    Not sure I understand the "ridged cylinder". Sketch? If there's just an upper fillet isn't that a pinned rather than moment connection? Is the pressure high enough to fall within ASME Section VIII Division 1 and thus you should follow the details and rules in UG-34?
  10. Geoff13

    API 650 Nozzle on weld joint

    If you are a student why aren't you posting your question in the student forum? : https://www.eng-tips.com/forums/student-engineer-general-discussion.1630/ While API 650 says you should not do this, it also provides rules for where there is no other feasible option.
  11. Geoff13

    Designing Blind Flange in PV Elite 26

    This forum is about storage tanks, like those covered by API 650 or AWWA D100. You seem to have pressure vessel question which would be better asked in either https://www.eng-tips.com/forums/boiler-and-pressure-vessel-engineering.794/ or...
  12. Geoff13

    Opening on Blind Flange

    There are times when I wish the Code Committee would explain their response, not just yes or no. I have re-read the Code and I can't see where the Committee is finding this requirement. It seems to me that they've added a requirement that isn't actually in the Code. Nonetheless, UG-34 is...
  13. Geoff13

    how to calculate manually,PERMISSIBLE OUT-OF-ROUNDNESS OF SPHERICAL SHELLS where external pressure is applied according to ASME VIII Div.1.

    UG-80 is pretty clear. Perhaps you could be more specific where you are having trouble, or perhaps show us your calcs so far.
  14. Geoff13

    Opening on Blind Flange

    UG-39(a) addresses opening in flat heads. This does reference the rules in UG-36(c)(3) for opening size and spacing limits. If you meet these size and spacing limits then the blind flange does not need to be reinforced for these openings.
  15. Geoff13

    Non-circular reinforcing pad EN 13445 / ASME VIII-1

    ASME Section VIII clause UG-42 addresses closely spaced openings. We always join the two circles with tangential lines rather than the "bar bell" shape you've shown.
  16. Geoff13

    Joint efficiency - UG-27 ASME BPVC

    There are not separate efficiencies for longitudinal and circumferential. This seems to be an invention of Mr. Schueler's which does not exist in the Code. This is the primary reason I advised ignoring this posting. There are separate formulas for longitudinal [clause UG-27(c)(1)] and...
  17. Geoff13

    Joint efficiency - UG-27 ASME BPVC

    NO. I said I've never heard of "equivalent longitudinal efficiency". Thus I have no opinion on how, or even why, anyone would calculate it. My only advice would be to follow the Code rather than a 20 year old Q&A posting. If the Code is not clear to you I'd suggest asking your supervisor how...
  18. Geoff13

    Joint efficiency - UG-27 ASME BPVC

    I've been designing pressure vessels for 30+ years and have seen the name Robert Schueler many times, so I know he's very knowledgeable, but I can't make much sense of his answer. I've never heard of "equivalent longitudinal efficiency'. Thus I only tried to give information I know, and...
  19. Geoff13

    IFR air raise calcs

    Oops, I did kips instead of tons, so double my numbers. Thanks. Crazy heavy either way.
  20. Geoff13

    IFR air raise calcs

    At 250 tons and 110 ft diameter that's 26 psf. A standard 3/16" steel deck is only 8 psf. What does your IFR look like to be so heavy? Next, 26 psf is only 5" (125 mm) water column. How did you arrive at 12" (300 mm) WC? A more reasonable weight will reduce this pressure even further. Air...

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