... ,BSI As a professional manufacture we supply many kinds of malleable iron pipe fittings: elbows, tees, sockets(coupling), bends, nipples, unions, crosses, flanges, plugs ... , round caps etc.Oil and Gas Pipe Fitting Galvanized Malleable Cast Iron Pipe Fitting Product ItemMalleable iron pipe fittings: elbow, tee, socket, bushing, reducer,bend, nipple, union, cross ...