Seamless steel pipe is the use of high-quality round steel for perforation, in the process of perforation, solid round steel becomes hollow inside, which is also known as seamless, the basic process is: round steel into the factory - inspection - perforation - annealing - pickling, phosphating, saponification - head - cold drawing - processing - inspection and other process operations, the principle of the perforation is simply the use of high temperature to soften the round steel, in the use of the top head to the middle of the solid part of the top off, it becomes hollow, the hollow round pipe is also called the blank tube, the blank tube is also called the blank tube.
The principle of perforation, simply put, is the use of high temperature, the round steel for softening, in the use of the top head to the middle of the solid part of the top off, it becomes a hollow, hollow round tube is also called a billet tube, billet tube after cold-drawing or cold-rolling process, into seamless steel pipe, followed by the car processing, inspection and other operations, the purpose of beating the head: in order to cold-drawing or cold-rolling process, into seamless steel pipe, and so on.
The purpose of the head: in order to cold-drawing, the machine can clamp the head, so to give the head for the head.
Cold drawing: a process of operation, seamless steel pipe after cold drawing operation, it can be into a certain specification.
