About 1250℃ hot air is blown by equipment. This equipment is “Tuyere Stock”. “Tuyere Stock” has to use for an extended period of time. And it has a safe structure. Because of furnace operation generate heat and pressure. Installation and maintenance must be easy, and AIR LEAK-free structure is produced. Because of easy detachable LOWER PIECE, LOWER BEND PIECE and BLOW PIPE. To meet customer needs, our “Tuyere Stock” is connected by EXPANSION JOINT. It is easy to repair and absorb large displacement in the limited space.