What are the categories of stainless steel pipes and what are the differences between them and seamless steel pipes?

Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural steel pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes and bimetal composite pipes, coated and coated pipes to save precious metals and meet special requirements. There are many types of stainless steel pipes with different uses, different technical requirements and different production methods. The outer diameter of steel pipes currently produced ranges from 0.1 to 4500 mm, and the wall thickness ranges from 0.01 to 250 mm. In order to distinguish their characteristics, steel pipes are usually divided into the following categories. Stainless steel pipes can be divided into round pipes and special-shaped pipes according to their cross-sectional shapes. Special-shaped tubes include rectangular tubes, rhombus tubes, oval tubes, hexagonal tubes, octagonal tubes and tubes of various cross-sections. Special-shaped pipes are widely used in various structural parts, tools and mechanical parts. Compared with round pipes, special-shaped pipes generally have a larger moment of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce the weight of the structure and save steel.
Advantages and disadvantages of stainless steel pipe welding:
manual welding. It is very common to use and easy to operate, mainly relying on human adjustment. Welding rods are used as filler materials for welds. Hand welding can weld almost all materials, even outdoors, so it is very adaptable. Welding generally uses direct current. The electrodes can be titanium covered electrodes or sealed electrodes. Titanium-clad welding rods are easy to weld, the welds are beautiful, and the welding slag is easy to remove. However, if it is not used for a long time, it must be baked again to prevent moisture accumulation.
1. The appearance of stainless steel pipes is generally white with no embroidery. The surface of ordinary seamless steel pipes will be embossed or reddish brown.
Stainless steel is corrosion-resistant and has a much better finish than ordinary steel pipes. etc.
2. Seamless steel pipes are wire-drawn, without welds, and the material can be ordinary No. 20 steel or stainless steel;
The general technology for general stainless steel pipes is welding, and the material is stainless steel.
Stainless steel pipes can be divided into equal-section pipes and variable-section pipes according to the shape of the profile. Variable cross-section tubes include tapered tubes, stepped tubes and periodic cross-section tubes. Can be divided into oil well pipes (casing, tubing, drill pipe, etc.). ), pipelines, boiler pipes, mechanical structural pipes, hydraulic support pipes, gas cylinder pipes, geological pipes, chemical pipes (high-pressure fertilizer pipes, petroleum cracking pipes) and marine pipes, etc.