Pressure Equipment Directive Overpressure during fire

[barqueiroenmarte]

Dear all!

European Directive about Pressure Equipment (PED 97/23) states in its Annex I that safety valves overpressure shall not exceed 10%. Does anybody know if it applies to fire exposure as well or other maximum overpressure (i.e 21%) can be used in that emergency case?

Regards

 

[techman81]

Hi,

You normally use 10% overpressure allowance unless it is ASME pressure vessel.