lap joint flang stub end Size: from 1/2 to 200 inch (DN15-DN6000) Standard: ... , JIS, EN, JB, GB, UNI,API lap joint flang stub end Technics: Forged Size: from 1/2 to 48(DN15-DN6000 ... (LWN) and so on. Standards: Ansi B16.5, A105 Class 150, Class300, Class600, Class900, Class1500, Class2500, Wnrf, Sorf, Blrf, Thrf, Swrf ... (Rst37.2, S235jrg2, A105 ) flange and lap joint flang stub end