Buy API STD 609:2026

Butterfly Valves: Double-flanged, Lug- and Wafer-type, and Butt-welding Ends

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PDF

Language(s)

English

Published date

18-05-2026

Publisher

American Petroleum Institute

€112.95

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This standard covers design, materials, face-to-face dimensions, pressure-temperature ratings, and examination, inspection, and test requirements for gray iron, ductile iron, bronze, steel, nickel-based alloy, or special alloy butterfly valves.

DocumentType	Standard
Pages	41
PublisherName	American Petroleum Institute
Status	Current
Supersedes	API STD 609:2021

API Q1:1990
EN 593:2017	Industrial valves - Metallic butterfly valves for general purposes
MSS SP-68:2021	High Pressure Butterfly Valves with Offset Design
MSS SP 44 : 2010	STEEL PIPELINE FLANGES

Frequently Asked Questions

No — API 609 is a United States standard published by American Petroleum Institute (API), with its listed region as United States.

API 609 specifies design, materials, testing and inspection requirements for butterfly valves. In practice it is applied by piping engineers, valve manufacturers, purchasers and inspectors.

API 609 specifies design, materials, testing and inspection requirements for butterfly valves. It is a United States standard published by American Petroleum Institute (API).

API 609 is used by piping engineers, valve manufacturers, purchasers and inspectors. It is a United States standard published by American Petroleum Institute (API).

API 609 is American Petroleum Institute (API)'s standard for butterfly valves, while ASME B31.12 covers hydrogen piping and pipelines (United States). API 609 specifies design, materials, testing and inspection requirements for butterfly valves. ASME B31.12 sets requirements for piping and pipelines used for gaseous and liquid hydrogen service.

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API STD 609:2026

Butterfly Valves: Double-flanged, Lug- and Wafer-type, and Butt-welding Ends

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Is API 609 an Australian standard?

What is API 609 used for?

What does API 609 cover?

Who uses API 609?

What is the difference between API 609 and ASME B31.12?