... ,BSI As a professional manufacture we supply many kinds of malleable iron pipe fittings: elbows, tees, sockets(coupling), bends, nipples ... , 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, flange, plug, backnut, cross over, round cap etc. ...