Connection types: Female thread, Weld, Flange

Structure types: threaded bonnet, welded bonnet, pressure self seal bonnet.

Using standards

1. Design and manufacture: BS 5352, MSS SP-118;

2. Socket weld size: ANSI B 16.11, JB/T 1751

3. Thread size: ANSI B1.20.1, JB/T 7306;

4. Butt weld size: ANSI B 16.25, JB/T 12224;

5. Flange size: ANSI B 16.5, JB 79

6. Test standard: API 598, GB/T 13927, JB/T 9092