Overview
Stainless steel square pipe is a kind of hollow long steel. It is widely used as a pipeline for transporting fluids, such as petroleum, natural gas, water, gas, steam, etc. In addition, when the bending and torsional strength is the same, the weight is light, so It is also widely used in manufacturing mechanical parts and engineering structures. It is also commonly used in the production of various conventional weapons, barrels, artillery shells, etc.
Category
There are two types of steel pipes: seamless steel pipes and welded steel pipes (seamed pipes).
According to the sectional shape, it can be divided into round pipes and special-shaped pipes. Round steel pipes are widely used, but there are some special-shaped steel pipes such as square, rectangular, semi-circular, hexagonal, equilateral triangle, and octagonal.
According to the composition can be divided into Cr (SUS400), Cr-Ni series (SUS300), Cr-Mn-Ni (SUS200) and precipitation hardening system (SUS600).
For stainless steel square pipes subjected to fluid pressure, hydraulic tests are performed to check the pressure resistance and quality. It is qualified that no leakage, soaking or swelling occurs under the specified pressure. Some steel pipes must be rolled according to standards or requirements Edge test, flare test, flattening test, etc.