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  1. trevornelson

    Help required to identify markings on studs and nuts on older USA pressure vessel.

    Thanks you for your advise so far. I found MIL-HDBK-57 on the internet and will keep a copy for future use also. Unfortunatly I couldnt identify the stamp in the manual. Regarding the U-1 query. I dont have one unfortunatly. The company bought the vessels 25 years ago for use in the UK and the...
  2. trevornelson

    Help required to identify markings on studs and nuts on older USA pressure vessel.

    Nut Markings attached. Thanks Trevor.http://files.engineering.com/getfile.aspx?folder=e49f00aa-1fef-4ecc-a299-e197f968cf6f&file=nut.jpg
  3. trevornelson

    Help required to identify markings on studs and nuts on older USA pressure vessel.

    Hi Guys and Galls, I am looking to do some refurb work to a seal surface of an older vessel used in a test lab. I will be pushing the seal diameter out slightly so need to reassess the pressure rating and stud capacity. I am struggling to work out what the stud markings indecate as I am from...
  4. trevornelson

    Vessel assesment of 60's multilayer vessel.

    Hi all I am looking for some advice on multi layered vessels. We use a 1964 multilayered vessel in our test facility for pressure testing in the UK. It does not present us any problems in day to day use however it is due for maintinance cleaning and repainting. I am considering having it...
  5. trevornelson

    Can you use PD5500 for vessel design for BRAZIL or should it be ASME?

    Hi Progger4. I have only just rechecked this thread. Thank you for your reponce. It is very helpful. Would it be possible for you to further expand on your answer please. You mention that no further 3rd party design assesment would be required. Would this also be the case if the vessel was...
  6. trevornelson

    Can you use PD5500 for vessel design for BRAZIL or should it be ASME?

    Thanks for everyone that has posted a reply. This is tricky for me as when I was a supplier I used to design to whatever code requirement was stipulated by the customer so there was no thought required, like the post above with Petrobras requiring Div1. Now I am the client its trickier as I...
  7. trevornelson

    Can you use PD5500 for vessel design for BRAZIL or should it be ASME?

    Hi everyone. I am looking to place a vessel in Brazil within a new facility we are constructing. I am looking for advice on suitable design codes for vessels deployed in Brazil as NR13 does not list any approved country codes such as ASME or PD5500 etc and isn't really a route to compliance...
  8. trevornelson

    Can a quick opening vessel be U stamped?

    Hi gr2 vessels Sorry I still find this unclear. UG35 covers design requirements of QOC, which I understand. I think what I need is which part of the code covers U stamp applicability? I was under the impression that a U stamp covered the pressure vessel, can individual components be...
  9. trevornelson

    Can a quick opening vessel be U stamped?

    Hi all, The question is: Many closure manufacturers advertise that they can supply U stamp and u-2A partial data reports. Can you U stamp a QOC as it isn't a pressure retaining part until it is welded into a vessel and cannot be pressure tested until welded in? In Europe the complete vessel is...

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