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  1. jte

    PSV Setting for Pneumatic Testing Of Pipe

    I've stayed off this forum for a few years now, but a friend called my attention to this thread so... I'm back. I can't tell you that following B31.3 is better or worse than following PCC-2. To a large extent my thoughts revolve around more specific circumstances such as jurisdictional...
  2. jte

    RePad in two pieces

    SnTMan already pointed to UG-37(h) which explicitly allows for two piece repads without 100% RT. However, unless A5 is decreased, the seam must not be less than 45° off the long axis. The weld seam can be transverse to the long axis (and from a hoop stress perspective this is optimal), but it...
  3. jte

    Weld Overlayed Dimension of RTJ groove in Standard Flanges

    To each his own. Perhaps if jbeckhou had added "...in my experience." I could agree with him/her. But, to state an absolute "never done" is incorrect. Since in my experience, it has been done, without excessive insanity, and with successful long runs after the modification. So, whatever. Just...
  4. jte

    Center portion of elliptical and torrispherical heads

    TankTheFrank- Are you perhaps thinking of VIII-1 Appendix 32? Specifically 32-6(h)?
  5. jte

    Weld Overlayed Dimension of RTJ groove in Standard Flanges

    Shanamo- The B16.5 rating is based on flange thickness, not groove dimensions. You could machine off the entire "ring groove height" area and you'd have a perfectly B16.5 compliant flat face flange. So, one option for you is to maintain that flange thickness dimension, machine the edges of the...
  6. jte

    NR13 Pressure Vessel Code

    For those of you who, like me, have no idea what NR13 is... http://www.braziliannr.com/brazilian-regulatory-standards/nr13-boilers-and-pressure-vessels/
  7. jte

    ASTM A-105 Acceptable Editions for ASME

    metengr - I'm curious as to your basis for the "unless" phrase in your statement above. Would it be UG-11(c)(3)(b)?
  8. jte

    SA 106 B PIPE 1" sh 40 Welded with flange 300# rfso

    Glad this vessel isn't being built for my company. This design would violate our vessel standards in at least two three ways. If this happens to be a Section VIII Div. 1 vessel, then I find it interesting that we have carbon steel with, apparently, zero corrosion allowance being used. Makes a...
  9. jte

    Decommissioning pressure vessels

    Nothing particularly surprising about a new construction code not dealing with issues after the U Stamp goes on. Section VIII covers nothing in terms of post-construction issues. As for procedures, metengr's guidance is hard to beat.
  10. jte

    Repair of Crude Column without Shutdown

    nickypaliwal- Welded Encapsulations are one of many topics addressed in ASME PCC-2 Repair of Pressure Equipment and Piping Part 2. They're used commonly enough, and easy to fabricate out of materials readily available at most refineries and upstream facilities. Nothing secret or special about...
  11. jte

    Do elbows provide vacuum support

    Interesting question... My approach would likely be to run an FEA. But perhaps a simpler way to look at it is that your length to diameter ratio is likely not going to matter. If you look at II-D Figure G for determining the A factor, you'll note that with a Do/T value of 50, the L/D has no...
  12. jte

    water hammer

    Hi shrestha1- You'll likely get a better focused audience in forum378. I suggest you repost your query there, then use the red flag icon to report this thread for removal so you aren't cross-posting.
  13. jte

    Use of Composite materials to alter ASME pressure vessels

    koshy- Strictly speaking, ASME PCC is a standard, not a code (the second "C" stands for "committee"). And PCC-2 covers nonmetallic repairs as one of several methods. It is a standard which provides guidance, but must be worked within jurisdictional requirements and must be consistent with the...
  14. jte

    2004 edition ASME Section VIII Div 2

    Caleb- Welcome to Eng-Tips! Consider adding a bit about yourself and your experience in your user profile. It helps in some cases to fine-tune a response. You can see my profile by clicking on my user name in this post. I'm curious as to which version of API 17D you are referring to. Looking it...
  15. jte

    Derivation of blank thickness

    Roark's Formulas for Stress and Strain, or simply Formulas for Stress and Strain by Roark if you have fourth edition or earlier, is a wonderful resource. But it should be recognized that at its heart it is not a text book covering basic principles but a compilation and simplification of results...
  16. jte

    Question about "ASME code key words" ?

    Well, ASME may be what metengr says above... I've heard a different version: ASME = Always, Sometimes, Maybe, Except Now, in addition to XL83NL's reference to B31.3, you could review ASME PCC-2 Part 1 paragraph 3.2. Which is a lot shorter than the B31.3 version. The definition for "should" is...
  17. jte

    API 650 Manholes

    125-250 rms will be fine for most gaskets that are found in the oil business. No machining whatsoever? You'll probably have some leakage issues - to what extent is a function of the gasket, mill scale quality and quantity, and the quality of the horse manure used as the gasket material.
  18. jte

    PV ELITE - allowable stress lower for shell than heads.. How and why?

    Minamtungekar- Thanks for closing the loop on your thread! That's a good practice that E-T could use more of! Now... it took you two and a half months for figure that out? [poke]
  19. jte

    Need water Flow Calculation for a punctured pipe of perfect 15mm dia.

    Sounds like a homework problem. What does your professor say about it? Also... since when was "kg" a unit of pressure?
  20. jte

    Tank Re-Rate & Joint efficiency

    Hi Bill- Stating things like code of construction and location (Jurisdictional rules can be important) are quite useful when posting questions. It seems that your query could be for an ASME Section VIII Division 1 pressure vessel. Maybe it's called a "tank", but probably not an atmospheric...

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