... th emost standard and material. FLANGE: WELDING NECK ,SLIP ON ,BLIND ,PLATE,THREADED,LAPPED ,SCREWDE,SOCKET WELDING PRESSURE: 1. ... Remark: 1)GOST 12820:PLATE FLANGE GOST 12821 :WELDING NECK FLANGE 2)JIS 2220:SOP:PLATE SOH :SLIP ON BLIND3) ... PLATE FLANGE 4) DIN :PLATE,WELDING NECK ,BLIND ,SCREWED,LAPPED 5) EN1092 ,BS 4504:SLIP ON ,WELDING NECK ,PLATE,BLIND,THREADED6) SABS1123:SLIP ON ,WELDING NECK ,PLATE ...