Name: Galvanized Square Steel Tubes - Custom Sizes for Fabrication & Engineering
Brand: Zhongtong Dingxing
Availability: InStock
Rating: 5 (1 reviews)

Description

Key attributes

Outer Diameter	2020mm~400400mm
Length	3-12M according to client requirement
Standard	Hollow section: ASTM A500, EN10219, EN10210, JIS3466, GB/T 6728
Material	Gr.A, Gr.B, Gr.C, S235, S275, S355, A36, SS400, Q195, Q235, Q345
Certificate	API , ce, Bsi, BIS, KS, GS, ISO9001
Finish of pipe	Hot dipped galvanized with zinc 220~260g/m2; Pre-Galvanized with zinc 30~150g/m2 Painted with black/varnish lacquer; Oil on the surface to prevent rust; Bare pipe without painting.
Applications	Construction / building materials steel pipe Steel structure Scaffolding pipe Fence post steel pipe Fire protection steel pipe Greenhouse steel pipe Low pressure liquid, water, gas, oil, line pipe Irrigation pipe Handrail pipe
Techinical	ERW
Delivery Time	15-21 days
Place of Origin	Tianjin, China

Pipes can be Customized according to customer's requirement on outside diameter and wall thickness withGalvanized coated or black painted(3PE, FBE, 3Pp)surface treatment.You can contact us to obtain more product lists.

Tailored Galvanized Square Steel Tubing for Every Project
Tianjin Zhongtong Dingxing’s galvanized steel square tube offers unmatched adaptability for fabrication and engineering applications. With sizes ranging from 20 × 20 mm to 200 × 200 mm and lengths of 6 m or 12 m, our tubes accommodate both standard and project-specific requirements. Each tube undergoes rigorous galvanization to ensure superior rust protection and surface finish — perfect for long-term structural integrity.

Exceptional Build Quality and Precision
These square hollow steel tubing products are manufactured with meticulous attention to detail. Our engineering team ensures exact dimensional control, edge precision, and straight cut ends, maximizing fit and reducing on-site labor. Manufactured under stringent quality protocols in our Daqiuzhuang facility, the tubes uphold performance and reliability in any application.

Flexible Solutions for Complex Needs
Beyond standard sizes, we specialize in tailored fabrication. Whether it's square steel tubing for architectural structures or precision square hollow steel tubing for custom builds, our collaboration with clients ensures each solution aligns exactly with design demands. Prompt order processing and flexible production workflows empower us to meet tight schedules and specifications.

Product Advantages

Reliable Corrosion Protection and Longevity
Each galvanized steel square tube benefits from a hot-dipped zinc layer—delivering long-lasting corrosion resistance, even in harsh environments. Ideal for external structures, agricultural frameworks, or industrial builds, the coating ensures minimal maintenance and extended lifecycle.

Custom Sizes to Match Your Design
Our comprehensive specification range (20 mm → 200 mm squares) and flexible length options enable seamless integration into diverse project requirements. Whether you’re working on staircases, urban facades, or intricate metal designs, we offer precision-crafted tubing that aligns with your design vision accurately.

Consistent Quality Backed by Advanced Production
Situated in Tianjin Daqiuzhuang—the heart of China’s steel logistics hub—our facility features four state-of-the-art galvanizing lines and rigorous QC systems. This enables us to consistently deliver high-standard products that earn the trust of global architects, fabricators, and steel pipe manufacturers.

Rapid Delivery and Competitive Wholesale Pricing
Our strategic location enables fast regional and international shipment. Whether you're placing a bulk order or urgent requirement, we deliver efficiently while maintaining competitive wholesale pricing. Combine quality, speed, and cost-effectiveness—Zhongtong Dingxing stands behind your project every step of the way.

Usage Scenarios

Fabricated Structural Frames
Perfect for creating load-bearing frames in buildings, bridges, warehouses, and industrial facilities. The galvanized steel square tube delivers structural stability and corrosion protection—long-term and cost-effective.

Architectural and Exposed Installations
These square tubes make ideal visual components in railings, facade elements, pergolas, and modern design accents. The clean finish and zinc protection ensure enduring beauty and strength in public and outdoor spaces.

Industrial Equipment and Machinery Supports
Use them for fabricating bases, stands, and supports in industrial machinery and conveyor systems. Strong, precise, and resistant to wear, these tubes perform reliably under consistent operational loads.

Outdoor Infrastructure and Agricultural Use
Ideal for fence posts, greenhouse frames, and agricultural support systems where moisture and weather exposure could degrade weaker materials. Our galvanized structure withstands environmental stress with ease.

Custom Metalwork and Renovation Projects
Perfect for stair framework, custom rail systems, frames, and metal furniture—where safety, dimensional precision, and aesthetics merge. Supply ready-to-install components tailored to designer and contractor needs.

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