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UPDATED 1 Sept: The EI library in London is temporarily closed to the public, as a precautionary measure in light of the ongoing COVID-19 situation. The Knowledge Service will still be answering email queries via email , or via live chats during working hours (09:15-17:00 GMT). Our e-library is always open for members here: eLibrary , for full-text access to over 200 e-books and millions of articles. Thank you for your patience.
Excess flow valves offer safety at moderate expense. C.D. McGowan. Pipeline Gas J., August 1995, 222(8), 43--47.
The evolution of excess flow valves (EFV) to improve the safety of natural gas distribution lines is discussed. The EFV should be installed as close to the main line service tee as possible and a typical design is described and illustrated. The valves are designed to sense pressure drop and excess flow and they provide instantaneous shut-off. Effects of recent legislative action on EFV development are discussed. Automatic reset valves are available but are not considered essential in service lines. It is reported that about 1000 EFVs are activated annually in response to third-party damage.
Abstract details
Journal title: Pipeline and Gas Journal
Subjects: Health and safety, Safety, Distribution, Gas distribution, Pipeline, Transportation, Transmission and Distribution, Natural gas, Oil and gas, Oil
