... can supply various standard and material flanges FLANGE:WELDING NECK ,SLIP ON ,BLIND ,PLATE,THREADED,LAPPED ,SCREWDE,SOCKET WELDING PRESSURE: ... 12821 :WELDING NECK FLANGE2)ANSI B 16.5 :WELDING NECK ,SLIP ON ,THREADED,LAP JOINT,SOCKET WELDING ,BLIND ,NO PLATE FLANGE ... ,BLIND ,SCREWED,LAPPED4) EN1092 ,BS 4504:SLIP ON ,WELDING NECK ,PLATE,BLIND,THREADED5) SABS1123:SLIP ON ,WELDING NECK ,PLATE,BLIND We are ...