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obtaining U stamp

obtaining U stamp

I work for uk vessel fabricator - ISO 9001 and PED certified.
We are looking at obtaining U stamp and would appreciate comments on the difficulty of this and how long such certification takes. We generally sub contract design, NDE (though I am qualified mech eng and have done many vessel designs) does this affect difficulty in certification?
Does any one have experience of how PED 97/23/EC can be related to U stamp. Many thanks

RE: obtaining U stamp

The U stamp is related to ASME VIII, the American Code and is not related directly to the PD5500. The current ASME VIII require you to obtain U stamp certification from the ASME Board. They will issue to you, based on extensive testing of your design and fabrication capability, experience and understanding of the current ASME code requirements. No specific PD 5500 requirements.
Please note that this month is due out the new ASME VIII re-write, which seems to bring major changes in the area of certification and perhaps in the area of U stamping also. Please be patient for a little longer and hopefully, the new Code will clarify for you the marking requirements.

RE: obtaining U stamp

Thanks for reply - I realized U stamp for ASME vessels but did not know requirements may change in 2007 issue. This is released this month isnt it.
I'm trying to get a feel for how difficult U stamp is to obtain, knowing the experience that we have in uk fabrication (we have made non-stamped ASME vessels as well). Testing understanding of ASME code sounds daunting I assume this includes IX. Can parts of code for which we have little experience be specified as undertaken by 3rd party?

RE: obtaining U stamp

ASME Section VIII requires materials that meet Section II, Welding and qualifications per per Section IX, and NDE and qualifications per Section V. The National Board along with the ASME will audit your written/documented quality Program and verify the implementation of that Program at your facility. I've helped a number of companies with this endeavor.  

RE: obtaining U stamp

With regard to gr2vessel's answer, i think there's been a bit of confusion between PED 97/23/EC and PD5500 (if I'm wrong then I'm sorry)

PED 97/23/EC is the deirective that you have to follow for pressure veseels to be used in the EU.

PD5500 is the British pressure vessel code.

You can use ASME for PED 97/23/EC. There was talk of an Appendix Z that would identify the elements of Annex 1 and how they are dealt with in ASME.

Essentially you use ASME VIII the same way you use PD5500, EN 13445, AD-2000 or Stoomwezen.

One thing to be wary of, in the same way that PED Notified Bodies are stricter in the US than they are in Europe, ASME Authorised Inspectors are stricter outside in Europe than in the US.

The key, as always, is attention to detail. Follwo the code implicitly and you'll produce safe and effective U-Stamp vessels quite easily.

RE: obtaining U stamp

Many thanks for your answers I think Fawkes has hit nail on head as far as I thought. Our 97/23/EC qualification (Module H) requires us to show a quality control method as applied to pressure vessel design and fabrication and show sufficient knowledge to enable us to self certify vessels. I thought the U stamp was a similar system (but not self certified) hence we could modify our existing quality control methods to account for ASME requirements. As far as AI s are concerned is this chosen by client for each vessel or our decision?

RE: obtaining U stamp

AI's are your decision: which Authorized Inspection Agency will you have monitor your activities. If you share the same AI as your customer then there is a 'perception' of commonality.

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