... :a). Forged Fitting(Socket Weld & Threaded): Tee, Elbow, Reducer, Cap, Coupling/Socket, Plug, Nipple and so onb). Butt Welded Fitting(Seamless or ... Welded): Tee, Elbow, Reducer, Cap, Coupling/Socket, Plug, Nipple and so on Material: a). Carbon Steel: ASTM ...