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Recent content by VeryPicky

  1. VeryPicky

    ASME B31.3 Inspection & Examination

    Does the Owner have a piping line class specification? You should check any NDE requirements there, too. I concur with Steakman911. Putting Human Factor Back in Engineering
  2. VeryPicky

    PWHT "Nominal Thickness"

    I would go with a sum of both fillets' throat thicknesses. UW-40(f)(3) Putting Human Factor Back in Engineering
  3. VeryPicky

    Hydrogen and methane bake-out

    As I was searching through the different treads of this forum, I found some good info regarding the bake-out, but there was not much discussion on the practices. I would like your opinion and advice on the bake-out temperature and time. So far the mnost common are the temperatures between 200°C...
  4. VeryPicky

    PWHT

    Sorry Guys. Forgive my frustration. It was not my intent to question your abilities. Most fabricators, I had misfortune to encounter, were totally relying on PWHT contractor, who could not even provide a decent PWHT procedure. When I talked emperature gradients, they gave me that absent look...
  5. VeryPicky

    PWHT

    Good point weldtek. Thank you for that. Please remember though that the Code is a set of minimum requirements not a pressure vesel design handbook. Good engineering practice will dictate how to make provision in PWHT procedure for the nozzle, which is substantially thicker than the shell...
  6. VeryPicky

    PWHT

    Great thread: some picky comments that came to my mind; and sorry if I repeate what was already said. 1. Don't put in the heat treatment furnace something that does not require heat treatment: blind flanges (and bolts); unless there is good reason to do it, which was not mention in the initial...
  7. VeryPicky

    Post Weld Heat Treatment

    I have to support JR97. So called "cold cracking" or "hydrogen cracking" is the factor in selecting the delay. The reason for the delay before liquid penetrant or magnetic particle examination is to allow all the hydrogen from metal to migrate to microvoids in material and cause cracking...
  8. VeryPicky

    Why should someone mentor?

    I think, the most important question I always have to ask myself is: is it coaching or is it mentoring? Most of you Esteemed Ladies und Gentlemen are very eloquently touching on "teaching the right way and ensuring the "young ones" follow our ways". I am not that youg anymore and continuously...
  9. VeryPicky

    Weld repairs - ASME Section VIII

    ASME BPV Code addresses only the new fabricated vessels, not repairs. Neither does it deal with various services. For the repairs i suggest API 510 for inspection and National Board Inspection Code old ANSI NB-23 for suggested repairs. Also, do your self a favour: do not stick the austenitic...
  10. VeryPicky

    SA-212 Grade B

    Thanks, Christine. Putting Human Factor Back in Engineering
  11. VeryPicky

    Vessel, why, when or not?

    JStephen your comment is duly noted. I don't think JLSeagull mentioned TX in his question. I apologize if I missed something. Putting Human Factor Back in Engineering
  12. VeryPicky

    MATERIAL SA36

    I am not sure why anybody would like to risk the use of questionable quality material on vessels. The mentioned UCS 6 (b)(1) suggests that the vessel may leak. I agree that SA-36 may meet the SA-516 strength but also it may not. Lottery or russian roulette? I don't want it in my vessels...
  13. VeryPicky

    Vessel, why, when or not?

    Well, in my humble opinion, the quest for ruling on what is and what is not a pressure vessel should start at the local authority. The lack of legal description of the vessel by this authority would warrant code definition to be applied. Don't forget the code is becoming law if referred to by...
  14. VeryPicky

    QW-407.2

    I love this disecting of every word in the code. In my understanding meteng's statement is correct that the code is addressing the multiple PWHT cycles. To confuse the issue more: How do you ensure with your famous (or infamous) 80% the heating and cooling rates of multiple PWHT are...
  15. VeryPicky

    MissingU-1A form

    Just a stupid thought. Have you tried tracing the U-1A's with the original vessel manufacturer? Another possibility is the AIA (if you know which one cosigned the form). Putting Human Factor Back in Engineering
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