China Pre‑Galvanized GI Square Tube Rectangular Tube Custom Complete Sizes

Our China‑origin pre‑galvanized GI square tubes and rectangular tubes, also known as hollow structural section pipes, are produced from high‑quality pre‑galvanized GI steel strips. Adopting cold forming and high‑frequency welding processes, these pipes feature precise dimensions, uniform zinc coating and clean appearance. We provide full standard sizes and personalized custom sizes to meet diverse industrial and engineering requirements worldwide.

Comprehensive Size Options:
We supply all mainstream standard GI square tube and rectangular tube sizes, and support non‑standard customized sizes.

Uniform Pre‑Galvanized Zinc Coating:
Zinc layer is pre‑coated on steel strips with even distribution, delivering good rust resistance for indoor and mild outdoor environments.

Smooth Surface & Easy Machining:
Burr‑free surface, convenient for cutting, welding, punching, bending and other secondary processing.

High Dimensional Accuracy:
Strict production tolerance control ensures stable structure and high compressive strength.

Direct Supply from Chinese Factory:
Competitive price, sufficient spot inventory, fast delivery for bulk export orders.

China pre‑galvanized GI square tubes and rectangular tubes are widely used in metal frames, warehouse storage racks, solar mounting brackets, mechanical equipment frames, handrails, indoor steel structures, furniture frames, electrical cabinets and light‑duty construction projects.