European Code Requirements

[don1980]

I'm looking for clear information stating the allowable accumulation for fire sizing in jurisdictions that are covered by PED.In the committee response copied below, they say that 10% accumulation isn't the rule for fire scenarios, but they don't give the allowable value.

Can anyone provide me the answer, and tell me where it is explained?


Guideline 5/2

[Original version as adopted on: 29 Jun 2000]
Pressure equipment directive 97/23/EC

Commission’s Working Group "Pressure"
Guideline related to: Annex I Section 2.11.2 , Annex I Section 2.12

Question: In respect of pressure limiting devices, does the PED require that the permitted short duration pressure surge of 1,1 PS be maintained when the equipment is exposed to external fire conditions ?
Answer: The 1,1 PS restriction does not apply to fire.
Reasons: The requirement in Annex I section 2.12 for external fire refers to damage limitation, and does not serve the purpose of pressure limiting device in normal operation.

Accepted by WPG on: 05 May 2000
Accepted by Working Group "pressure": 29 Jun 2000

 

[MortenA]

I understand this as you can use e.g. API520 (21% over pressure) for the fire case.

Best regards

Morten