ASTM A500 galvanized steel pipe is cold-formed welded carbon steel tubing complying with US ASTM A500 standard for structural applications. Hot-dip galvanization coats its surface with uniform zinc layers to deliver superior anti-rust, corrosion and oxidation resistance outdoors. Available in round, square and rectangular hollow sections, it features stable mechanical strength, precise dimensional tolerance and easy fabrication via cutting, bending or welding. Widely used in guardrails, building frames, greenhouse supports, fencing and mechanical frameworks. The zinc coating extends service life significantly under humid, rainy or coastal environments while retaining lightweight structural advantages of hollow steel tubes.