GB 304 stainless steel tube rolling

The raw material for rolling GB 304 stainless steel pipe (seamless steel pipe) is round tube. The round tube embryo is cut by the cutting machine and made into 1 m blank, and sent to the furnace by the conveyor belt for heating. The billet is fed into the furnace for heating at a temperature of about 1200 °C. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. The baked round tubes go through pressure punching machine and stop punching. The common perforation machine is cone-shaped roller punching machine. Such punching machine enjoys high efficiency, good quality, large perforation expansion diameter, and can wear a variety of steel. After perforation, round tube billets experience three roll chrome, rolling or extrusion. After extrusion, they are detached. Sizing machine drill into the steel embryo with high-speed for perforation, and form the steel pipe. The inner diameter of the pipe is determined by the length of the outside diameter of the drill bit. After sizing, GB steel pipes are sent to the cooling tower, after water cooling, steel pipe will be straighten. After the steel pipes straightened, they are sent to the metal testing machine (or water pressure test) by conveyor belt to make the internal testing. If the steel pipe has internal cracks, bubbles and other issues, they will be detected. After quality inspection, the steel pipe also experience rigorous manual selection. And the pipes will be paint number, specifications, consumption lot number, etc information. And hanging into the warehouse by the crane.