Technical specification:
1. Design: API 602, MSS-SP-117
2. Connection ends:
A. Scoket welded ends conform to ANSI B16.11; GB/T1751
B. Screw ends conform to ANSI B1.20.1; GB/T7306
C. Butt-welded ends conform to ANSI B16.25; GB/T12224
D. Flanged ends conform to ANSI B16.5; GB/T79
3. Test & inspection: API 598; GB/T13927
4. Structure feature:
Bolted bonnet, outside screw and yoke.
Welded bonnet, outside screw and yoke.
5. Body materials: A105, F11, F22, 304, 304L, 316, 316L
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