... , slip on and so on. ANSI B16.5 welding neck flangeN15 to DN1200, 1/2 inch to 48 ... BS4504,SABS1123,EN1092,UNI,GOST12820-80Types: plate, slip on, welding neck, blind, thread, socket weld flangeProcess: free forging, ... ,RST37.2,S235,C22.8Zhangqiu Shengli Forging Co., Ltd. is located in the beautiful and rich the Blacksmith ... , machining, assembly, inspection, packaging production forged welding neck flange