Standard 609 Butterfly valves: Double flanged, lug- and wafer-type
Publication Year
2021
Document Status
Current
Abstract
Specifies design, materials, face-to-face dimensions, pressure-temperature ratings and examination, inspection, and test requirements for grey iron, ductile iron, bronze, steel, nickel-base alloy, or special alloy butterfly valves that provide tight shutoff in the closed position and are suitable for flow regulation.
Document History
Ninth edition, April 2021. Effective date October 2021.
Publisher Information
American Petroleum Institute
The API is a US trade association representing all aspects of the oil and natural gas industry, from large integrated companies to exploration and production, refining, marketing, pipeline and marine businesses, and service and supply firms.
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Washington, DC
API
USA
Website: www.api.org
Tel: +1 202 682-8000
