ERW black square hollow section is easily recyclable. Many projects take advantage of square steel tubing, including all types of buildings, highway guardrails and signage, support columns, trusses, bridges, heavy equipment, storage systems, and exercise equipment.

There is a  complete set of production line for ERW square hollow section.We use steel strips (steel coils) for raw materials,then through a variety of processing technology,such as uncoiling flattening,shearing and butt welding,circle shearing,loop shoring,roll forming and cttting etc.