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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Pipe & Tube > High Quality Cold Rolled Base Hot Dipped Galvanized Square Tube Smooth Surface Anti-corrosion Rectangular Pipe For Construction Fence Greenhouse

High Quality Cold Rolled Base Hot Dipped Galvanized Square Tube Smooth Surface Anti-corrosion Rectangular Pipe For Construction Fence Greenhouse

Product Spotlights

High quality hot dipped galvanized surface, great anti-corrosion ability
Strict quality control, uniform zinc coating, no zinc peeling
Smooth surface, straight tube, stable bearing performance
Custom sizes & cutting length available
Ideal for construction, fence, framework and engineering projects

Negotiable MOQ: 1 Ton (Price negotiable depending on order volume and customization)

Key Specifications

Get Latest Price

Type:

Welded

Warranty:

Technique:

Cold Drawn

Contact Supplier Request Quote Chat Now

Shandong Zhong'ao Steel Co., Ltd.

1Yr

Payment & Shipping

Payment Methods:

Port of Shipment:

Tianjin

Delivery Detail:

15 days

Product Details
Company Profile
Contact Us

Type Welded

Warranty 1

Technique Cold Drawn

Surface Treatment Galvanized

Usage Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Material Carbon Steel

Section Shape Rectangular

Product Name Hot Dipped Galvanized Square Tube / Galvanized Rectangular Pipe

Standard GB/T 6728, ASTM A500, EN10210

Production Process Straight seam welded, hot dipped galvanized

Zinc Coating 60–120μm (Customizable)

Shape Square / Rectangular Hollow Section

Outer Size 10×10mm – 300×300mm; Rectangular 20×10mm – 400×200mm

Wall Thickness 1.2mm – 12.0mm

Length 5.8m, 6m, 11.8m, 12m / Custom cut length

Transport Package Export packaging can be customized

Specification National standard can be customized

Origin China

1. Product Introduction

Our high-quality hot dipped galvanized square tube and rectangular tube are made of prime carbon steel materials and processed through strict high-frequency welding and hot-dip galvanizing technology. We have sufficient spot inventory and stable stock supply to support fast batch delivery. The steel surface features uniform zinc coating, smooth finish and strong anti-corrosion performance. All products are strictly quality inspected to ensure straight tube body, stable structure and excellent load-bearing capacity. Widely used in construction structures, fence frames, greenhouse supports and various overseas engineering projects.

2. Product Features & Advantages

Premium Anti-rust Performance – Standard hot-dip galvanized layer with strong adhesion, not easy to peel off during cutting, bending and welding. Effectively resist rust and corrosion in outdoor, humid and coastal environments.
Strict Quality Control – Consistent wall thickness, straight tube shape, flat surface without burrs. Stable mechanical property, high strength and long service life.
Complete Specifications – Full size range in stock, support customized sizes, wall thickness and fixed cutting length.
Good Processing Performance – Easy for welding, punching, bending and cutting to meet different project requirements.
Factory Direct Price & Stable Supply – Large production capacity, support bulk order and long-term project cooperation.
3. Product Specifications

Item	Specification
Product Name	Hot Dipped Galvanized Square Tube / Rectangular Tube / GI Hollow Section
Material	Q195, Q235B, Q355B, SS400, S235JR
Production Process	ERW Welded + Hot Dipped Galvanized
Zinc Coating	60–120μm (customized available)
Size Range	Square: 10×10mm–300×300mm; Rectangular: 20×10mm–400×200mm
Wall Thickness	1.2mm–12.0mm
Length	5.8m, 6m, 11.8m, 12m / Custom length
Execution Standard	GB/T6728, ASTM A500, EN10219
Surface Feature	Smooth, uniform zinc layer, no rust, no zinc spangle defect

4. Application Scope
Widely applied in building steel structures, construction framework, fence and guardrail, greenhouse frame, municipal engineering, mechanical equipment supports, warehouse structure and outdoor engineering projects.
5. Packaging & Delivery
Standard export packing with steel strips bundling and waterproof film. Suitable for 20GP/40GP container loading. Support FOB, CFR, CIF international trade terms. Fast delivery for regular sizes.