"Coded" PSVs

[nde3rich]

I am trying to find a reference as to what determines if a safety valve is "coded" or not. I understand the design differences, but need to know what determines if a valve requires a UV or VR stamp for repaired valves....

Richard S.
ASNT NDT Level III
API 510,570,653, AWS-CWI

 

[mghawar]

Hi,

If the system you are protecting is a pressure vessel and ASME codes are applicable, than your PSV needs to be design in accordance with ASME code and needs to be "coded". UV stamp means that the valve or pressure vessel is build according to ASME Standards. These code excerpts may help.

http://dsps.wi.gov/sb/docs/sb-CodeDevComm41AdoptAppx85to106.pdf

 

[XL83NL]

The opposite may also be through, and there may even be requirements other than ASME code stamping for such devices.

Alltough (ASME design plus) stamping may often be mandatory by law in most parts of the North-American continent, as well as certain other countries outside North-Amrica, it is not a requirement for European countries, where PED 97/23/EC is (in most cases) mandatory, thus CE-marking.
Given this topic is posted in the Boiler and Pressure Vessel engineering Forum, and not ASME Code Issues forum, one may keep in mind not all posters here are American and not all answers should be reasoned from that POV.