... malleable cast iron pipe fitting 1Standard :BS/ASTM/ ANSI 2Material: BS1378 ASME16.9 ANSI ... (elbows, tees, sockets, bends, nipples, unions, crosses, flanges, plugs, backnuts, crosses over, round caps, etc. ) 2 ... Pipe Fittings Material: According with GB/T9440 malleable iron, ASTM A-197, ISO5922, EN1562. 4. Pipe Fittings Specification: ... Usage: Suitable for joining pipe lines of water, gas, oil, air.