Hot rolled (extruded seamless steel pipe): round pipe heating piercing three-roll rolling, rolling or extrusion separation sizing (or reduction) cooling straightening water pressure test (or detection) marking storage.


Raw materials are rolled up seamlessly through pipes, and embryo growth is cut through pipes into a blank space of about one meter in the cutting machine, and heated to the furnace body through a conveyor belt. The billet is put into the furnace at a temperature of about 1200 degrees Celsius. Fuel is hydrogen or acetylene. Temperature control is a key problem. After the pipe punch is released by air pressure. The common punch is tapered roller punching machine. This punch has high production efficiency, product quality, strong perforation diameter expansion ability and can wear all kinds of steel. After piercing, the tube is rolled, rolled or extruded by three rolls. Determine dimensions from pipes. High-speed rotary cone drill is machined with perforated steel embryo. The diameter of the pipe is determined by the length of the drill bit of the diameter sizing machine. After cooling, the cooling pipe is placed into the cooling tower through the spray cooling tube and needs to be straightened. The straightened belt conveyor is sent to the metal detector (or pressure test) for internal testing. If there are cracks and bubbles in the inner pipe, they will be detected. After choosing steel products, strict quality control manual should be adopted. After steel quality, quantity, size, batch number of coatings, etc. The crane was hoisted into the warehouse.


Cold drawn (rolled) seamless steel pipe: perforated pipe hot annealing pickling Title (copper) multi-channel stretching (cold) pipe straightening heat treatment water pressure test marking storage.


Cold-drawn (rolled) seamless steel pipe is rolled more than hot-rolled seamless steel pipe. The first three steps of their production process are basically the same.  The difference begins with step 4. After the tube is empty, annealing begins. Special pickling solution is used after annealing. Oil after pickling. After repeated stretching (cold), then blank tube, special heat treatment. After heat treatment, it must be straightened. The straightened belt conveyor is sent to the metal detector (or pressure test) for internal testing. If there are cracks and bubbles in the inner pipe, they will be detected. After choosing steel products, strict quality control manual should be adopted. After steel quality, quantity, size, batch number of coatings, etc. The crane was hoisted into the warehouse.