Square tube material: 304, 304L, TP304, TP316L, 316, 316L, 316Ti, 321, 347h, 310S.

Stainless steel square tubeIt is a kind of hollow long steel. Because the section is square, it is called square tube. A large number of pipelines are used to transport fluids, such as oil, natural gas, water, gas, steam, etc. in addition, when the bending and torsional strength are the same, the weight is relatively light, so they are also widely used in the manufacture of mechanical parts and engineering structures.

Classification of stainless steel square pipe:Square pipe is divided into seamless steel pipe and welded steel pipe (slotted pipe). According to the section shape, stainless steel square pipe can be divided into square pipe and rectangular pipe. Circular steel pipe is widely used, but there are also some special-shaped steel pipes such as semicircular, hexagonal, equilateral triangle and octagonal.

For the stainless steel square pipe bearing fluid pressure, hydraulic test shall be carried out to check its pressure resistance and quality. It is qualified if there is no leakage, wetting or expansion under the specified pressure. Some steel pipes shall also be subject to crimping test, flaring test, flattening test, etc. according to the standard or the requirements of the demander.

Specification of square tube: 5 * 5 ~ 150 * 150 mm thickness: 0.4 ~ 6.0 mm

Production process

Round steel preparation → heating → hot rolling perforation → head cutting → pickling → grinding → lubrication → cold rolling → degreasing → solution heat treatment → straightening → pipe cutting → pickling → finished product inspection.