MS square pipe is a type of hollow steel tubing that has a square cross-section. It is also known as mild steel square pipe or mild steel hollow section. MS square pipes are commonly used in construction, fabrication, and structural engineering applications due to their strength, durability, and versatility. MS square pipes are made from mild steel, which is a type of low carbon steel that is easy to work with, weld, and cut. The manufacturing process involves cutting steel coils into strips, forming them into square shapes, and then welding the edges together to create a seamless tube. MS square pipes come in various sizes, ranging from small sizes for domestic and light commercial applications to larger sizes for heavy-duty industrial use. They are also available in different thicknesses, depending on the application and the level of strength required.