Stainless steel pipe is a hollow strip of round steel.

Mainly used in petroleum, chemical, medical, food, light industry, mechanical instrumentation and other industries.

In addition, when the bending and torsional strength are the same, the weight is light, so it is also widely used in the manufacture of mechanical parts and engineering structures. Also used as furniture and kitchenware.

Stainless steel pipes are divided into materials according to their materials:

Ordinary carbon steel pipe, high quality carbon structural steel pipe, alloy structural pipe, alloy steel pipe, bearing steel pipe, stainless steel pipe, coated pipe, etc.

Stainless steel tubes are available in a wide variety of applications, with different technical requirements and different production methods.

The outer diameter of the currently produced steel pipe ranges from 0.1 to 4500 mm and the wall thickness ranges from 0.01 to 250 mm. In order to distinguish the characteristics, the steel pipes are usually classified as follows.

production methods

Stainless steel pipe is divided into two categories: seamless pipe and welded pipe according to production mode.

Seamless steel tubes can be further divided into hot rolled tubes, cold rolled tubes, cold drawn tubes and extruded tubes, etc. Cold drawing and cold rolling are secondary processing of steel tubes;

Welded pipes are divided into straight welded pipes and spiral welded pipes.

Section shape

Stainless steel tubes can be divided into round tubes and shaped tubes according to the cross-sectional shape.

The special-shaped tube has a rectangular tube, a rhombic tube, an elliptical tube, a hexagonal tube, an eight-sided tube, and various cross-section asymmetric tubes.

Shaped tubes are widely used in a variety of structural parts, tools and mechanical parts.

Compared with the round pipe, the special-shaped pipe generally has a large moment of inertia and a section modulus, and has a large bending and torsion resistance, which can greatly reduce the structural weight and save steel.

Stainless steel pipes can be divided into equal-section pipes and variable-section pipes according to the longitudinal section shape.

The variable section pipe has a conical pipe, a stepped pipe and a periodic section pipe.

Tube end shape

The stainless steel tube can be divided into a light pipe and a wire tube (threaded steel pipe) according to the state of the pipe end.

Use classification

According to the application, it can be divided into oil well pipe (casing, oil pipe and drill pipe, etc.), mechanical structural pipe, chemical pipe (high pressure fertilizer pipe, petroleum cracking pipe) and ship pipe.