... Petrochemical, Energy, Nuclear, Automotive, Military, and so on..ASME Welding Neck FlangeClass:- 150, 300, 600, 900, 1500, 3000Size:- 1 ... /2" - 60"Types: - Welding Neck (WN), Slip-on (SO), Blind (BL), Socket Weld (SW ... B16.5, B16.47- JIS B2220- BS10, BS3293, BS4504- DIN 2502, 2503, 2527, 2565 / 2566, 2573 / 2576, ... 8588-8633Website: www.chinachaowei.com ASME Welding Neck Flange