Classification of stainless steel square tubes: seamless steel pipes square tubes and welded steel pipes (seam pipes) are two main categories. According to the shape of the part, it can be divided into square and rectangular tubes. It is widely used for circular steel tubes, but there are some semicircular, hexagonal, equilateral triangle, octagonal and other steel tubes.
For stainless steel tubes that withstand fluid pressure, hydraulic tests should be performed to test their resistance and quality to pressure. Under the specified pressure, no leakage, wetting or expansion qualifies, and some steel pipes should be tested for winding, expansion and leveling according to standard or demand requirements.
