... , B16.36, MSS SP44 Types:Welding Neck Flange, Slip on Flange, Threaded Flange,Socket Welding Flange, Blind Flange, Orifice Flange,Ring Joint Flanges, Long Welding Neck ... TO PN40 Standard:BS1560 : WELDING NECK FLANGE, SOCKET WELDING FLANGE, SLIP-ON BOSS FLANGE, BLIND FLANGE,SCREWED BOSS FLANGE, LAPPED FLANGE. PRESSURE GRADE:150 , 300 , 400 ...