Galvanized Steel Pipe Manufacturer & Supplier From China | GI Pipe Factory

Hot-dip and pre-galvanized steel pipes with complete sizes, customizable zinc coating, stable supply, and export-ready packaging.

Why Choose Our Galvanized Steel Pipes

Since 1993

Over 30 years of experience in steel supply, processing, and project support.

30,000 Tons

Large ready stock to support fast delivery and bulk project requirements.

Factory Direct Supplu

Stable production capacity for galvanized round pipes, square tubes, and rectangular tubes.

Export Experience

Experienced in export packaging, container loading, customs documentation, and international delivery.

Galvanized Round Pipe Manufacturer & Supplier

CanHope Steel manufactures and supplies hot-dip galvanized steel pipes and pre-galvanized steel pipes for construction, fire protection, water supply, scaffolding, agriculture, and industrial projects.

Our galvanized round pipes are available in a wide range of outside diameters, wall thicknesses, lengths, and zinc coating specifications. Standard stock lengths are generally 6 meters, while 5.8-meter pipes can be supplied for efficient 20GP container loading.

Custom pipe sizes, wall thicknesses, zinc coating weights, threading, grooving, packaging, and private labeling can be discussed according to project requirements.

OD Range

DN15–DN300

Hot-Dip Thickness

1.5–10.0 mm

Pre-GI Pipe Thickness

0.6–3.0 mm

Standard Length

6 m

Export Length

5.8M

Zinc Coating

Custom available

Our Galvanized Pipe Factory

Watch our production process, quality inspection, warehouse management, and export packaging in this short factory video.

Applications of Galvanized Steel Pipe

Galvanized steel pipes are widely used in projects that require strength, corrosion resistance, long service life, and reliable supply. The appropriate pipe type, wall thickness, and zinc coating should be selected according to the installation environment and project standard.

Fire Protection Systems

Hot-dip galvanized steel pipes can be used in fire sprinkler systems, fire water supply networks, and other fire protection piping applications where corrosion resistance is required.

Water Supply Systems

Galvanized pipes are used for water transportation, agricultural irrigation, drainage, and general fluid delivery projects.

Construction Projects

Galvanized round pipes are suitable for structural frames, supports, guardrails, fencing, temporary structures, and general construction applications.

Scaffolding Systems

Galvanized steel pipes provide strength, durability, and improved outdoor corrosion resistance for scaffolding and access systems.

Industrial Projects

Galvanized pipes are used in factories, warehouses, logistics centers, equipment structures, and industrial fluid transportation systems.

Galvanized Pipe Sizes & Specifications

CanHope Steel supplies galvanized round pipes from DN15 to DN300. Available wall thicknesses depend on pipe diameter, manufacturing process, applicable standard, and project requirements.

Hot-dip galvanized steel pipes are generally available from 1.5 mm to 10.0 mm. Common stock thicknesses used for medium- and heavy-duty applications are often between 2.5 mm and 6.0 mm or above, depending on the outside diameter.

Pre-galvanized pipes are commonly available from 0.6 mm to 3.0 mm. Smaller round pipes and structural tubes are usually supplied in thinner wall thicknesses, while larger sizes may be available up to 2.5 mm or 3.0 mm.

Standard stock length is normally 6 meters per piece. For export shipments using 20GP containers, 5.8-meter lengths can be customized to improve container utilization.

Specification	Available Range
Nominal Diameter	DN15–DN300
Hot-Dip Galvanized Thickness	1.5–10.0 mm, depending on diameter
Pre-Galvanized Thickness	0.6–3.0 mm, depending on size
Standard Length	6 m
Export Length	5.8 m for 20GP
Zinc Coating	Standard stock or customized
Pipe Ends	Plain, threaded or grooved

Need to calculate the theoretical weight for a specific pipe size or order quantity? Check the weight per meter, per piece and total order weight with our free calculator.Need to calculate the theoretical weight for a specific pipe size or order quantity? Check the weight per meter, per piece and total order weight with our free calculator.

Hot-Dip Galvanized vs Pre-Galvanized Steel Pipe

Hot-dip galvanized pipe and pre-galvanized pipe both use zinc coating to protect the steel surface, but they differ significantly in production method, coating weight, wall thickness, corrosion resistance, and application.

Feature	Hot-Dip Galvanized Pipe	Pre-Galvanized Pipe
Production Method	Finished black steel pipe is galvanized after pipe production	Pipe is formed and welded from pre-galvanized steel strip
Common Stock Wall Thickness	Typically 2.5–6.0 mm or above, depending on diameter	Typically 0.6–3.0 mm, depending on size
Common Stock Zinc Coating	Approximately 200–300 g/m²	Commonly Z40, approximately 40 g/m² total on both sides
Approximate Zinc Thickness	Approximately 30–45 μm	Approximately 3 μm per exposed side
Corrosion Resistance	Higher	Suitable for light-duty and lower-corrosion environments
Surface Appearance	Thicker coating with a more industrial finish	Smoother and brighter surface
Typical Applications	Fire protection, water supply, outdoor construction, industrial projects	Furniture, greenhouse frames, fencing, supports, and light structures
Cost	Higher	Lower
Customization	High-zinc coating, size, thickness, and length can be customized	Higher-zinc strip, size, thickness, and length can be customized

For projects with higher corrosion protection requirements, CanHope Steel can provide customized zinc coating specifications for galvanized round pipes, square tubes, and rectangular tubes.

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What is the lifespan of galvanized steel pipe?

Depending on the environment and coating thickness, galvanized steel pipes can typically last between 20 and 50 years.

Can galvanized steel pipe be used for fire protection systems?

Yes. Hot-dip galvanized steel pipes are widely used in fire sprinkler systems, fire water supply networks, and fire protection projects worldwide.

What standards do you produce?

We can supply galvanized steel pipes according to BS1387, ASTM A53, EN10255, and other international standards.

What is the difference between hot-dip galvanized and pre-galvanized pipe?

Hot-dip galvanized pipes have a thicker zinc coating and better corrosion resistance, while pre-galvanized pipes offer a smoother surface and lower cost.

What sizes are available?

Our galvanized steel pipes are available from DN15 to DN300, with customized sizes available upon request.

Can you provide customized lengths?

Yes. Standard length is usually 6 meters, while 5.8-meter pipes are commonly supplied for 20GP container loading.

Which countries do you export to?

Our products are exported to Africa, Southeast Asia, the Middle East, and South America.

Can you load mixed products in one container?

Yes. We can combine galvanized pipes, grooved fittings, valves, steel coils, and other steel products in one shipment.