... /8" to 64" 3,Standard: BS,DIN etc Socket-welding flange Production standard: GB/T9112~9124-2000 JB/T81 ... WPBTypes: Welding Neck Flanges, Slip on Flanges, Threaded Flanges, Socket Welding Flanges, Blind Flanges, Orifice Flanges, Lap Joint Flanges, ... 48”NB DN15-DN2000 Application: Petroleum, chemical, machinery, electric power, shipbuilding, papermaking, construction, etcPacking: Wooden box, sea-worthy ...