PED vs API

[shabbirvora]

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

 

[Xianglu]

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

 

[ggarciae]

Xianglu is right.
PED is law, not a standard.
European standards are EN.
Even leakage in the seat of the valve is allowed in some cases by PED.
You can access PED and guidelines at

http://ec.europa.eu/enterprise/pressure_equipment/ped/index_en.html

Regards from Barcelona
G. García

 

[shabbirvora]

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

 

[ggarciae]

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