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PED vs API

PED vs API

PED vs API

(OP)
We have vendor from Europe who is having design and calculation of valves to API standards and equaly the seat leakage test done as per  API Standards.
They are suggesting that the valves are Stamped and certified to PED and also bear the CE mark. But not the API mark.
Can somebody suggest the differences for the above
on the technical side in between the European and American norms; limitations if any in terms of PED norm valve put under evaluation when specs are based on the American standards.
Thanks

RE: PED vs API

PED provides guidelines for pressure vessels including PSVs used in EU countries. The guidelines give the basic requirements of design, construction material, inspection and marking.  API provides details in terms of sizing, system design particularly in the details of process design.  There is no conflict between the two. PED allows the PSV to be designed according to API.  If it’s North American application, PED does not mean anything.
If required, I can send you a copy of PED.
 Henry

RE: PED vs API

(OP)
Thanks to Xianglu & Garcia!
One more question, as mentioned above, the design for valve from Europe which we are talking is based on API specs and leakage test is also to API as they confirm.
But than why is it that they are not having API mark.
(We found this case with more than one European manufacture

RE: PED vs API

Cause standards are not law, are helping tools.
An ASME or API inspector for this countries is not authorized to certify to local regulations. They would prefer designs to local standards too and now to european norms EN.

Regards from Barcelona
G. García

RE: PED vs API

OK, lets sort this out.

You can mark to PED and API but you MUST mark to PED.

The PED requires markings to conform to a specific format.

The PED provides a series of Essentail Safety Requirements (Annex1) that must be met an a series of modules that define the standard of inspection and third party involvement.

You CANNOT CE mark a product if it falls outside the scope of the directive or if it falls under the limits of article 3 paragrah 3.

There is a CEN forum on this site that will provide losts of useful information on European Directives.

It would be worthwhile looking at the guidelines of the PED web site to determine how to categorise valves, of the top of my head they will propbably be safety accessories but I could be wrong, the categorisation, fluid and pressure determine the lowest category and hence the lowest module you can use for PED compliance.

WE have marked vessels for PED and ASME U Stamp before now but the markng is different and you MUST comply with the marking as specified in the directive (for example maximum allowable working pressure or design pressure is shown as PS not MAWP or DP)

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