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7. Glossary
These definitions are taken from NF EN ISO 4126-1 (07/04) "Safety devices for protection against excessive pressure, Part 1: Safety valves", NF EN 14071 "Safety valves for liquefied petroleum gas (LPG) tanks. Auxiliary equipment, and NF EN ISO 23251 "Petroleum, petrochemical and natural gas industries. Depressurization and overpressure protection systems".
Pressure drop on re-closing; blow down
Difference between opening pressure and reclosing pressure, generally expressed as a percentage of opening pressure, except for pressures below 3 bar, when it is expressed in bar.
Coefficient of discharge; Coefficient de débit
Actual flow rate (from tests) divided by calculated theoretical flow rate.
Built-up back pressure
Pressure downstream of the...
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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
...
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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