API 594 Wafer Check Valves
| Technical Specification | |
| Design and manufacture standard | API 6D/ASME B16.34 |
| Face to face standard | API 6D/ASME B16.10 |
| Pressure-temperature rating standard | ANSI B 16.34 |
| Flange end dimension standard | ASME B16.5/ASME B16.47 |
| Welded ends dimension standard | ASME B16.25 |
| Inspection and test standard | API 6D/API598 |
| Material | |||||
| Carbon steel | Stainless steel | Low temperature material | |||
| WCB/WCC | F304 | F304L | F316 | F316L | LCB/A352-LF2 |
| WCB/WCC/WC6/WC9/CF8/CF8M | F304+STL | F304L-STL | F316+STL | F316L+STL | LCB/A352-LF2 |
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