Petroleum, petrochemical and natural gas industries - Pressure-relieving and depressuring systems - Amendment 1 (ISO 23251:2007/Amd 1:2008); English version EN ISO 23251:2007/A1:2008— 11 стр.
Petroleum, petrochemical and natural gas industries - Pressure-relieving and depressuring systems (ISO 23251:2006); English version EN ISO 23251:2007— 199 стр.