Rectangular tube is a kind of hollow long steel, also known as flat tube, flat square tube or square flat tube. When the bending resistance and torsional strength are the same, the weight is lighter, so it is widely used in the manufacture of mechanical parts and engineering structures.

Compared with structures made with open sections, steel tube structures can save about 20% of steel in industrial buildings and about 50% in tower structures. According to the force state of the parts, supply conditions, production and processing conditions and costs, the structure of the steel pipe can be a round pipe structure or a rectangular pipe structure, or a mixture of two steel pipes.

The square tube sizing method is an important factor in determining the outer diameter tolerance of the steel tube. Longitudinal rolling and sizing square pipe, the outer diameter accuracy of steel pipe can reach about 1%, while skew rolling sizing square pipe has a high outer diameter accuracy of 0.5%.

The reason why the q235b rectangular pipe is cold drawn is to better promote the hardness of the product, so as to better ensure the quality of the pipe, so that users can use it better. Because the cost of cold drawing is slightly higher, the price of the pipe will also be higher rose slightly.

Oil casing tubing is the lifeblood of oil well production. In the downhole, in view of the difference in geological conditions, the downhole stress conditions are complex, and the comprehensive effects of tension, compression, bending, and torsion have raised the requirements for the quality of the casing itself.

In the cutting of 16mn square tube, the phenomenon of uneven incision, deformation and cracking of the incision often occurs. How can we solve the problem of cutting the 16mn square tube?

Stainless steel welded pipe is the most used equipment in life now, but there will be certain defects in the process of processing and welding. These defects will lead to stress concentration, reduce the bearing capacity, shorten the service life, and even cause brittle fracture. This will affect the quality of the finished product.

People often think that magnets attract alloy pipes to verify their pros and cons and their authenticity. If they do not attract and have no magnetism, they are considered to be good and genuine; those who attract magnets are considered to be counterfeit and fake. In fact, this is an extremely one-sided, unrealistic and wrong identification method.