Welding Neck Flanges Sep. 7, 2009 21:13:34
1. Type: Welding Neck flanges
2. Materials: ASTM A105, DIN ST37.2 ASTM A182-F304, F304L, F316, F316L , Q235 , 20# , 20Mn, 16Mn;
3. Standard: ANSI B16.5, B16.47, MSS SP-44, API, DIN, JIS, HG, GB, JB....
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