Introduction:

The stainless steel square tube is a hollow, long strip of steel. It is called a square tube because of its square cross-section. A large number of pipelines are used for conveying fluids, such as oil, natural gas, water, gas, steam, etc. In addition, when the bending and torsion strength are the same, the weight is lighter, so it is also widely used in the manufacture of mechanical parts and engineering structures.

Stainless steel square pipe classification: square pipe is divided into two categories: seamless steel pipe and welded steel pipe (seam pipe). According to the cross-sectional shape, it can be divided into square and rectangular pipes. Round steel pipes are widely used, but there are also some special-shaped steel pipes such as semicircular, hexagonal, equilateral triangle, and octagonal.

For stainless steel square pipes subjected to fluid pressure, hydraulic tests must be carried out to verify their pressure resistance and quality. They are qualified without leakage, wetting or expansion under the specified pressure. Some steel pipes must be coiled according to standards or requirements of the buyer. Edge test, flaring test, flattening test, etc.