Classification and standard of stainless steel pipes

1. Stainless steel pipes are classified according to raw materials

It is divided into general carbon steel pipe, high- quality carbon structure steel pipe, alloy structure pipe, alloy steel pipe, bearing steel pipe, stainless steel pipe and bimetal composite pipe, coating and coated pipe for saving precious metals and satisfying special requirments. The varieties of stainless steel pipes are complex, the uses are different, the technical requirements are different, and the production methods are also different. At that time, the outside diameter of the silver zone pipe produced was 0.1-4500mm, and the wall thickness was 0.01-250mm. In order to distinguish its characteristics, the steel pipe is generally classified according to the following methods.

2. stainless steel pipe according to the production method classification

Stainless steel pipe according to the production method is divided into seamless pipe and welded pipe two categories, seamless steel pipe can be divided into hot rolled pipe, cold rolled pipe, cold drawn pipe and extruded pipe, cold drawn, cold rolled is the second steel pipe

Secondary processing; The welded pipe is divided into straight seam welded pipe and spiral welded pipe.

3.stainless steel pipe according to the section shape classification

Stainless steel pipe according to the cross-section shape can be divided into round pipe and shaped pipe. The specialshaped pipe has rectangular pipe, diamond pipe, oval pipe, hexagonal pipe, eight pipe and a variety of cross-section asymmetric pipe. Shaped tubes are widely used in various structural parts, things and mechanical parts. Compared with the round tube, the shaped tube generally has a larger moment of inertia and section modulus, and has a larger bending and torsion resistance, which can greatly reduce the weight of the structure and save steel.

Stainless steel pipe according to the profile shape can be divided into equal section pipe and variable section pipe. The variable section pipe has conical pipe, stepped pipe and periodic section pipe.

4.stainless steel pipe according to the shape of the pipe end classification

Stainless steel pipe according to the state of the pipe end can be divided into light pipe and wire pipe (with rebar steel pipe). Wire pipe can also be divided into general wire pipe (transport water, gas and other low pressure pipe, the selection of general cylindrical or conical pipe thread connection) and special thread pipe (oil, geological drilling pipe, about the important wire pipe, the selection of special thread connection), for some special pipe, in order to compensate for the impact of thread on the strength of the pipe end, generally before the pipe end thickening (internal thickening, external thickening or Thickened inside and out).

5.stainless steel pipe according to the use of classification

According to the use can be divided into oil well pipe (casing, tubing and drill pipe, etc.), pipeline pipe, boiler pipe, mechanical structure pipe, hydraulic support pipe, gas cylinder pipe, geological pipe, chemical pipe (high pressure fertilizer pipe, oil cracking pipe) and vessel pipe, etc.