Details of rectangular steel pipes commonly used in industrial projects

Rectangular steel pipes are in continuous production, especially in the welding process, which has a considerable impact on the quality of rectangular steel pipes, so the welding techniques we often see are automatic welding and manual welding. Automatic welding generally uses submerged arc welding and plasma welding, and manual welding generally uses argon arc welding.

Rectangular steel pipes have good thermal insulation, long life, and good corrosion resistance. Bad steel will have many defects, easy to fold, and the surface is also easy to be uneven. In the process of producing pipes, the rectangular steel pipe company mixes iron oxide powder and pulverized coal to make pellets or blocks and lays 1 to 2 layers on the hearth of the rotary furnace.

Rectangular steel pipes are not necessarily stainless, and they will rust due to some external factors over time. Therefore, it cannot be used to judge the quality of steel. Once the oxide is reduced to metal and becomes vapor, it is separated from the block material and reoxidized and recovered as dust in the exhaust gas. The reduced iron obtained is used in blast furnaces and converters and recycled in steel plants. The recovered crude zinc oxide is reused as raw material for zinc refining furnaces.

Generally, welded steel pipes have high precision, uniform wall thickness, high brightness inside and outside the pipe (the surface brightness of the steel pipe is determined by the surface grade of the steel plate), can be arbitrarily sized, and square pipes have demonstrated their economy and aesthetics in high-precision, medium, and low-pressure fluid applications.

Currently, right-angle square steel pipes are mainly used for machinery, automobiles, bicycles, furniture, hotel and restaurant decoration, and other mechanical parts and structural parts. Its representative materials are Q195, Q235B, Q345B, Q390, Q460, etc.