What are the categories of stainless steel pipes and what is the difference from seamless steel pipes

According to the material, 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, 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 steel pipes currently produced have an outer diameter of 0.1-4500 mm and a wall thickness of 0.01-250 mm. In order to distinguish their characteristics, steel pipes are generally divided into the following categories. Stainless steel tubes can be divided into round tubes and special-shaped tubes according to the cross-sectional shape. Shaped tubes include rectangular tubes, diamond tubes, oval tubes, hexagonal tubes, octagonal tubes and tubes of various cross-sections. Shaped tubes are widely used in various structural parts, tools and mechanical parts. Compared with round pipes, special-shaped pipes generally have larger moments of inertia and section modulus, and greater bending and torsion resistance, which can greatly reduce structural weight 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 people to adjust. Welding rods are used as filler material for welds. Manual welding can weld almost all materials, even outdoors, so it has good adaptability. Welding generally uses direct current. The electrodes can be titanium covered electrodes or sealed electrodes. Titanium clad electrode is easy to weld, the weld seam is 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. Appearance The general process of stainless steel pipes is white without embroidery. Ordinary seamless steel pipes will have embossed or reddish brown on the surface.
Stainless steel is corrosion resistant and has a much better finish than ordinary steel pipes. etc.
2. Seamless steel pipe drawing process, no weld seam, the material can be ordinary 20 steel or stainless steel;
The general technology of general stainless steel pipe is welding, and the material is stainless steel.
According to the shape of the profile, stainless steel pipes can be divided into equal-section pipes and variable-section pipes. Variable section tubes include tapered tubes, stepped tubes, and periodic section tubes. Can be divided into oil well pipes (casing, tubing, drill pipe, etc.). ), pipeline pipes, boiler pipes, mechanical structure pipes, hydraulic prop pipes, gas cylinder pipes, geological pipes, chemical pipes (high pressure fertilizer pipes, petroleum cracking pipes) and marine pipes, etc.