... ANSI, DIN, BS, JIS, EN, JB, GB, UNI,API lap joint flang stub end Technics: Forged Size: from 1/2 to ... threaded Connection: Welding Varieties: Threaded Flange, Slip-On Flange (SO), Socket Welding Flange, Lap Joint Flange (LJF), Welding Neck Flange (WNF), ... Spacer & Blanks), Square Flange, Long Welding Neck (LWN) and so on. Standards: Ansi B16.5, A105 Class 150, Class300, Class600, Class900, Class1500 ...