Materials used for greenhouse frames are mostly galvanized pipes.

Galvanized steel pipes, also known as galvanized钢管, come in two types: hot-dip galvanized and electro-galvanized. Hot-dip galvanized pipes have thick zinc coatings, ensuring even coating, strong adhesion, and long service life. Electro-galvanized pipes are cost-effective but have a less smooth surface and are much less corrosion-resistant than hot-dip galvanized pipes.