1. Design and manufacture conform to BS5351 MSS SP-118;
2. Connection ends conform to:
1) Scoket welded ends conform to ANSI B16.11; JB/T1751
2) Screw ends conform to ANSI B1.20.1; JB/T7306
3) Butt-welded ends conform to ANSI B16.25; JB/T12224
Design and Manufacture: API 608, API 6D, BS5351
Face to face(end to end): ANSI B16.10, API 6D
Flanged connection: 2"~24" to ANSI B16.5
Fire-safe: API 607, API 6FA