... " 3,Standard: ANSI,DIN,BS ansi class 900 flanges Production standard: ansi class 900 flanges GB/T9112~9124-2000 JB/T81-94 ... , chemical, machinery, electric power, shipbuilding, papermaking, construction, etcPacking: ansi class 900 flanges Wooden box, sea-worthy plywood pallets with polyethylene film ...