The fittings elbow barbed is customized by the manufacturer. The cold drawn (rolled) pipe can be divided into round pipes and special-shaped pipes. The raw material for rolling seamless elbow pipe fittings is round pipe blanks. The pipe blanks are cut into a length of about one meter by a cutting machine. The steel billets are sent into the furnace through a conveyor belt for heating. The billet is fed into the furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene.
The temperature control in the furnace is a key issue. After the round tube is out of the furnace, it should be emptied by a pressure punching machine. Generally speaking, the common punching machine is a cone punching machine, which has high production efficiency, good product quality, large perforation and expansion, and can perforate through a variety of pipe fittings.