API STD 609:2026
Current
Butterfly Valves: Double-flanged, Lug- and Wafer-type, and Butt-welding Ends
English
05-18-2026
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 |
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