Dear all
As per U-1(d) of ASME section VIII Div.1 , equipment can be code stamped even if pressure exceeds 3000 psi.

As per U-1 (d) " For pressures above 3000 psi (20 MPa), deviations from and additions to these rules usually are necessary to meet the requirements of design principles and construction practices for these high pressures. Only in the event that after having applied these additional design principles and construction practices, the vessel still complies with all the requirements of this Division, may it be stamped with the applicable code symbol".

Can anyone please explain me where to look for the above said additional requirements?

Thanking You and With regards

Hi RS,

To help you with these requirements, please consider the following:

Perform a Fatigue Analysis.
Fully radiograph the applicable seams in the vessel.
Select the best quality materials possible.
Do not use reinforcing pads.
PWHT even if you don't have to.
Provide a good surface finish of all welds.
Use impact tested materials (if applicable).

There are probably others I can't think of, but these few considerations should go a long way in satisfying the end user as well as the inspectors and inspection agency.