| API Standard Number | Title of Standard Specification |
|---|---|
| API SPEC 6D | Pipeline Valves |
| API 526 | Flanged Steel Pressure Relief Valves |
| API 527 | Seat Tightness of Pressure Relief Valves R(2002) |
| ANSI/API STD 594 | Check Valves: Flanged, Lug, Wafer and Butt-welding |
| API 598 | Valve Inspection and Testing |
| ANSI/API 599 | Metal Plug Valves – Flanged, Threaded and Welding Ends |
| ANSI/API 600 | Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries |
| API 602 | Compact Steel Gate Valves – Flanged, Threaded, Welding, and Extended-Body Ends |
| ANSI/API 603 | Corrosion-Resistant, Bolted Bonnet Gate Valves – Flanged and Butt-Welding Ends |
| ANSI/API 607 | Fire Test for Soft-Seated Quarter Turn Valves |
| API 609 | Butterfly Valves: Double Flanged, Lug- and Wafer-Type |
| API 6FA | Specification for Fire Test for Valves |
| API 6FC | Fire Test for Valve with Automatic Backseats |
| API 6RS | Referenced Standards for Committee 6, Standardization of Valves and Wellhead Equipment |
| API 11V6 | Design of Continuous Flow Gas Lift Installations Using Injection Pressure Operated Valves |
| ANSI/API RP 11V7 | Recommended Practice for Repair, Testing, and Setting Gas Lift Valves |
| API 520-1 | Sizing, Selection, and Installation of Pressure-Relieving Devices in Refineries: Part I – Sizing and Selection |
| API 520-2 | Recommended Practice 520: Sizing, Selection, and Installation of Pressure-Relieving Devices in Refineries-Part II, Installation |
| ANSI/API 574 | Inspection Practices for Piping System Components |
| ANSI/API 576 | Inspection of Pressure Relieving Devices |
| ANSI/API 608 | Metal Ball Valves – Flanged and Butt-Welding Ends |
API – Valve Standards
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