Piping and Fittings: A20 and C20 and Duriron
Alloy 20, Carpenter 20 and Duriron
Manufactures: past and present:
- Alloy Piping Products (A20 piping and fittings) (USA) (Texas Family of Companies)
- Duriron (began 1922): Durco: Flow Serve [Durimet]
- Hy-Lok (smaller sizes; Alloy: C276)
- Installoy: Bi-Lok: Generant (Texas Family of Companies)
- J&J Alloys (Texas Family of Companies)
- SFG (Texas Family of Companies) (stub ends and plate flanges)
- Swagelok (smaller sizes; Alloy: C276, 400, 625, 825)
- Note: There are several foreign manufacturers as well.
Note: There are many valve manufacturers that provide A-20 material,
such as Apollo, Cooper, Crane, Fisher (Emerson), Flowserve (Durco), Flow-Tek, Keckley,
Ladish, Milwaukee, Neles-Jamesbury, Sharpe, SVR Global, Warren, and others.
Aloyco (Crane) manufacturers A-20 check, gate, and globe valves.
Definition of C-20 by Nickel Systems: (external link)
Instrumentation: Tubing & Instrument Fittings (and related Valves & Instruments): (internal link)
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