BS EN 13774 is a European standard that deals with metal isolating valves used for gas distribution systems with maximum operating pressure up to 16 bar, and which operate with fuel gases of the first, the second and the third family, in accordance with EN 437.
The types of isolating valves to be considered are: plug and ball valves, gate valves, globe valves and butterfly valves.
The valves covered in BS EN 13774 operate in the following classes of temperature:
BS EN 13774 gives additional requirements to the relevant products standards. In case of contradictions between the standards mentioned in Annex B and BS EN 13774, EN 13774 prevails.
BS EN 13774 does not apply to:
In the case of power-operated valves, the requirements for the power source are not covered by BS EN 13774.
BS EN 13774 on valves for gas distribution performance requirements is useful for:
A gas distribution network is a system of external pipelines that connect a gas supply to a gas consumer service line, as well as the associated facilities and engineering devices. An exterior pipeline is a pipeline that connects an outer building structure to the ground, aboveground, and/or overhead.
BS EN 13774 provides the manufacturers with guidelines for requirements for type tests and production tests which can assess the endurance and the performance of the equipment. Using BS EN 13774 guidelines ensures enhanced performance for greater efficiency and high quality for longer service life.
BS EN 13774:2013 supersedes EN 13774:2003, which is withdrawn. BS EN 13774:2013 includes some editorial changes with respect to EN 13774:2003. These include:
EN 13774:2013