UNE-EN 13942:2009 Petroleum and natural gas industries - Pipeline transportation systems - Pipeline valves (ISO 14313:2007 modified) (Endorsed by AENOR in March of 2009.)
2009UNE-EN 13942:2009/AC:2009 Petroleum and natural gas industries - Pipeline transportation systems - Pipeline valves (ISO 14313:2007 modified/Cor 1:2009) (Endorsed by AENOR in June of 2009.)
2009UNE-EN 13942:2009 Petroleum and natural gas industries - Pipeline transportation systems - Pipeline valves (ISO 14313:2007 modified) (Endorsed by AENOR in March of 2009.)