Product Standards: 1. Design and manufacture conform to API 602, MSS SP-118. 2. Connection ends conform to: Socket welded ends conform to ANSI B16.11 Screw ends conform to ANSI B1.20 3. Test and Inspection: API 598 4. Structure Features: Pressure sealing bonnet, full port, outside screw and yoke 5. Materials conform to ANSI/ASTM 6. Main Materials: A105, LF2, F5, F11, F22, 304L, 316L, F347, F321, ...