Stainless steel pipes are divided into ordinary carbon steel pipes, high -quality carbon structure steel pipes, alloy structure pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, and dual metal composite pipes, plating and coating pipes to save valuable metals and meet special requirements Essence There are many types of stainless steel pipes, different uses, different technical requirements, and different production methods. The currently produced steel pipe diameter range is 0.1-4500mm, and the wall thickness range is 0.01 to 250mm. In order to distinguish between its characteristics, the steel pipe is classified as follows.
Ways to produce
Stainless steel pipes are divided into two categories: seamless pipes and welded pipes according to the production method. Seamless steel pipes can be divided into hot rolled pipes, cold -rolled pipes, cold pull tubes and extrusion pipes. Machining; welded pipes are divided into straight welded pipes and spiral welded pipes.
Section shape
The stainless steel tube can be divided into round tubes and alien tubes according to the horizontal section. Alien tubes include rectangular tube, diamond -shaped tube, ellipse tube, six -way tube, eight -square tube, and various sections asymmetric tube. Alien pipes are widely used in various structural parts, tools and mechanical parts. Compared with the round tube, the alien tube generally has a large inertial torque and cross -sectional number. It has large bending and anti -twisting capacity, which can greatly reduce the structural weight and save steel.
Stainless steel pipes can be divided into section tubes and transformer tubes according to the vertical surface shape. The facial tubes include cone -shaped tube, staircase tube, and cyclical section tube.
Tube
Stainless steel pipes can be divided into light pipes and car wire pipes (with threaded steel pipes) according to the state of the pipe end. The wire tube can be divided into ordinary car tube (transport water, gas and other low -pressure pipes, and uses ordinary cylinders or cone tube threads) and special threaded pipes (oil and geological drilling pipes. Special thread connection), in order to make up for the effects of the intensity of the thread on the tube, the pipe end is usually thickened (internal thickness, external thickening, or internal and external thickening).
Use classification
It can be divided into oil well pipes (sleeves, oil pipes and drill rods, etc.), pipelines, boiler tube, mechanical structure tube, hydraulic pillar tube, gas cylinder tube, geological tube, chemical tube (high -pressure fertilizer pipe, petroleum cracking tube, oil cracking tube ) And ship pipes.
Production
Stainless steel welding pipe production process:
Ingredients-division-welding tube-repair end-polishing-inspection (jet)-packaging-shipment (storage) (decorative welding pipe).
Ingredients-division-welding tube-heat treatment-correction-correction-repair-pickles-water pressure test-inspection (jet) (Pipe pipe pipe pipe tube).
