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1. Safety valve regulations
Safety valves protecting equipment subject to the Pressure Directive 97/23/EC (pending transposition into French law of Directive 2014/68/EU of May 15, 2014, published on June 27, 2014, and applicable from July 19, 2016, after transposition into French law) are also safety accessories (pressure-limiting devices) under this directive. This (cf. section 2.11.2) stipulates that they must be designed in such a way that the pressure in the ESP does not permanently exceed the maximum allowable pressure PS. A short-term overpressure of 10% of this PS is permissible. As the maximum permissible diaphragm stress corresponding to this PS, in carbon steel pressure vessels, is of the order of 66.7% of the material's elastic limit, a stress of 73.3% of the elastic limit is temporarily allowed. This provides a significant safety margin when discharging the valve under the above conditions.
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Safety valve regulations
Main causes of excess pressure
Bibliography
Also in our database
Websites
Legislative texts (French administration website) http://www.legifrance.gouv.fr
INERIS. AIDA regulatory database http://www.ineris.fr/aida
SNCT (Syndicat national de la chaudronnerie et de la tuyauterie)
Standards and norms
- Dispositifs de sécurité pour protection contre les pressions excessives - NF EN ISO 4126-1 à 7 -
- Industries du pétrole, de la pétrochimie et du gaz naturel. Systèmes de dépressurisation et de protection contre les surpressions - NF EN ISO 23251 -
- Soupapes de sécurité pour réservoirs GPL - NF EN 14129 -
- Soupapes de sûreté des réservoirs de gaz de pétrole liquéfié (GPL). Équipement auxiliaire...
Regulations
Decree no. 99-1046 of December 23, 1999 on pressure equipment
Decree of December 21, 1999 on the classification and conformity assessment of pressure equipment
Order of March 15, 2000 on the operation of pressure equipment
BSEI circular no. 06-80 of March 6, 2006 on the conditions for application of the order of March 15, 2000
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Technical documentation
INERIS BADORIS : Document de synthèse relatif à une barrière technique – Safety valve – 2007
Manual for the storage of propane and butane. Léon Hérenstein – Société du Journal des Usines à Gaz – 1976
Technical documentation from valve manufacturers
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