1. Construction: PSB&WPB
2. Integral Seat
3. Material for trim is depend on client requirement&operating condition
4. Design&Manufacture: ANSI B16.34.
5. Socket Welding Dimension: ANSI B16.11
6. Screw End Dimension: ANSI N1.20.1
7. Flange Dimension: ANSI B16.5
8. Inspect and Test: API598; EN12266-1