ERW rectangular tube refers to a type of rectangular hollow structural section(HSS) that is manufactured using the Electric Resistance Welding (ERW) process.

ASTM A178 ERW Steel Pipe refers to an Electric Resistance Welded pipe manufactured according to the specifications outlined by the American Society for Testing and Materials (ASTM) under the A178 standard.

Stainless Steel ERW Pipes(SS ERW pipe) are produced from stainless steel raw materials using the Electric Resistance Welding (ERW) process.

Steel pipe piles are products made of steel pipes, tongues and grooves, and tenon pins.

Compared with welded steel pipes, cold-drawn seamless pipes are a type of steel processed through a series of cold drawing, cold bending and other technologies in a normal temperature environment.

During the construction of high-speed railway bridges, steel pipe piles are the main part of the bridge support system, and their construction technology has a direct impact on the bridge's support capacity.