Galvanized Steel Pipe
Galvanized steel pipe is zinc-coated carbon steel pipe designed for water supply, construction, scaffolding, fencing, greenhouse, and structural applications. Available in multiple standards including BS 1387, EN 10255, ASTM A53, JIS G3452, and GB/T 3091. Hot-dip and pre-galvanized options available.
| Material | Carbon Steel with Zinc Coating |
|---|---|
| Grade / Standard | BS 1387 / EN 10255 / ASTM A53 / JIS G3452 / GB/T 3091 |
| Outer Diameter (OD) | 21.3mm - 219.1mm (Standard Round Pipe) / Custom up to 406.4mm |
| Wall Thickness (WT) | 1.5mm - 8.0mm (Depending on standard and weight class) |
| Length | 5.8m / 6m / 12m (or cut to length) |
| Delivery Condition | hot_rolled / cold_rolled / normalized / as_rolled |
| Surface Treatment | galvanized / coated |
| MOQ | 1 Ton |
| Delivery Time | 15-30 Days / In Stock |
| Loading Port | Tianjin / Shanghai / Qingdao |
Overview of Galvanized Steel Pipe
Galvanized steel pipe is a carbon steel pipe protected by a zinc coating through hot-dip galvanizing or pre-galvanizing process, designed to provide long-term corrosion resistance in water supply, construction, fencing, scaffolding, greenhouse, and general industrial applications. Compared with black steel pipe, galvanized steel pipe offers significantly improved atmospheric and moisture corrosion protection, helping reduce maintenance frequency and extend service life in outdoor or humid environments.
Galvanized steel pipe is widely produced under international standards including BS 1387, EN 10255, ASTM A53, JIS G3452, and GB/T 3091. It is available in round pipe, square tube, rectangular tube, scaffolding tube, and threaded pipe forms, with multiple end finishes and zinc coating options. As one of the most practical and cost-effective anti-corrosion steel pipe solutions, galvanized steel pipe remains one of the most popular products for infrastructure, construction, plumbing, agricultural, and mechanical use worldwide.
Key Features and Coating Advantages
The core advantage of galvanized steel pipe lies in its zinc coating, which provides two layers of protection: a physical barrier that isolates the base steel from moisture and air, and sacrificial protection where zinc corrodes before steel when the surface is scratched. This makes galvanized pipe especially suitable for outdoor and semi-corrosive environments where plain carbon steel would rust quickly.
Hot-dip galvanized pipes generally have thicker zinc coating and longer service life than pre-galvanized pipes. Depending on the standard and coating requirement, zinc coating can range from Z200 to Z600 g/m² or equivalent thickness. Galvanized steel pipes are supplied in various wall thickness classes such as light, medium, heavy, schedule 40/80, or structural wall thicknesses, with optional threaded ends, grooved ends, plain ends, and socket connections. They are easy to cut, connect, weld, and install, making them widely accepted by contractors and distributors.
Main Applications of Galvanized Steel Pipe
Galvanized steel pipe is commonly used in water transportation, low-pressure fluid conveyance, fire protection systems, structural frameworks, fence posts, guardrails, scaffolding systems, steel greenhouse structures, agricultural irrigation systems, handrails, support frames, and light industrial fabrication. Round galvanized pipes are widely used in plumbing, scaffolding, and fencing, while galvanized square and rectangular tubes are frequently selected for steel structures, gates, doors, machinery frames, and lightweight building systems.
For projects requiring economical corrosion resistance without the cost of stainless steel, galvanized steel pipe provides an ideal balance of durability, availability, and price. It is especially suitable for projects in the Middle East, Africa, South Asia, Southeast Asia, and Latin America where climate conditions and budget considerations often make galvanized steel a preferred choice.
Why Choose Us for Galvanized Steel Pipe
Shandong Tanglu Metal Material Co., Ltd. supplies galvanized steel pipes in a full range of standards, sizes, and coating conditions for international B2B buyers. We support both hot-dip galvanized and pre-galvanized production, with complete export documentation, mill test certificates, and flexible loading solutions. Standard lengths, custom cut lengths, threaded ends, and project-specific packing are all available according to order requirements.
With stable supply resources, professional export packing, and responsive sales support, we help contractors, distributors, and industrial buyers source galvanized steel pipes efficiently and reliably. Whether you need galvanized water pipe, scaffolding tube, greenhouse pipe, or structural galvanized tubing, our team can provide technical support and competitive quotation within 24 hours.
📐 Dimension & Size Table
| Nominal Size | Outside Diameter (mm) | Wall Thickness (mm) | Typical Use |
|---|---|---|---|
| 1/2 inch | 21.3 | 2.0-3.2 | Water pipe / conduit |
| 3/4 inch | 26.9 | 2.3-3.2 | Water pipe / conduit |
| 1 inch | 33.7 | 2.6-4.0 | Plumbing / low pressure fluid |
| 1-1/4 inch | 42.4 | 2.6-4.0 | Construction / handrail |
| 1-1/2 inch | 48.3 | 2.9-4.0 | Scaffolding / structural support |
| 2 inch | 60.3 | 2.9-4.5 | Water / structural |
| 2-1/2 inch | 73.0 | 3.2-5.0 | Fencing / structural frame |
| 3 inch | 88.9 | 3.2-5.0 | Pipeline / fluid transport |
| 4 inch | 114.3 | 3.6-5.4 | Irrigation / industrial use |
| 5 inch | 139.7 | 4.0-5.4 | Industrial pipe / support structure |
| 6 inch | 168.3 | 4.5-6.0 | Industrial line / piling support |
| 8 inch | 219.1 | 5.0-8.0 | Large diameter utility applications |
* Custom sizes available upon request. Tolerances per relevant international standards.
🔬 Chemical Composition
| Element | Min | Max | Display Value | Note |
|---|---|---|---|---|
| C | - | 0.22-0.30 | Varies by standard | Base steel chemistry depends on BS / ASTM / JIS / GB standard |
| Si | - | 0.35 | ≤0.35 | Typical base steel range |
| Mn | - | 0.90-1.20 | Varies by grade | Base steel strengthening element |
| P | - | 0.045 | ≤0.045 | Maximum impurity |
| S | - | 0.045 | ≤0.045 | Maximum impurity |
| Zn (Coating) | 99.0 | - | ≥99.0% | Pure zinc coating |
| Coating Weight | 200 | 600 | 200-600 g/m² | Typical coating range depending on process |
* Chemical composition may vary by heat, thickness and specification. Please refer to the actual mill test certificate.
⚙️ Mechanical Properties
| Property | Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength | ≥320-410 | MPa | Depends on base standard and weight class |
| Yield Strength | ≥195-235 | MPa | Typical base steel requirement |
| Elongation | ≥20 | % | Varies by standard |
| Hydrostatic Test | Pass | - | Performed per applicable standard |
| Coating Adhesion | Pass | - | No flaking after bend test |
| Surface Quality | Smooth | - | Free from major bare spots and excess zinc lumps |
| Corrosion Protection Life | 20-50 | years | Depending on zinc coating and environment |
* Values shown are minimum requirements unless otherwise stated.
📦 Commercial Information
| Packaging | Standard seaworthy export packing for galvanized steel pipes. Pipes bundled in hexagonal or square bundles with steel strapping (3-5 wraps per bundle), with plastic caps on both ends to prevent coating damage during transit. Each bundle is tagged with heat number, size, standard, and quantity. Custom wrapping with waterproof film and anti-rust protection available for long shipping routes or special project requirements. |
|---|---|
| Payment Terms | T/T (Telegraphic Transfer),L/C (Letter of Credit),D/P (Documents against Payment),Western Union,PayPal |
| Price Term | FOB,CFR,CIF,EXW |
| Supply Capacity | 5,000 Tons/Month (Galvanized Steel Pipes) |
| Loading Port | Tianjin / Shanghai / Qingdao |
Why Choose Our Galvanized Steel Pipe?
Mill Certified Zinc Protection
Every galvanized pipe is supplied with original mill test certificate and coating inspection report, ensuring stable mechanical performance and verified zinc coating quality.
Multiple Standards and Dimensions
Available in BS, ASTM, EN, JIS, and GB standards with complete size range from 1/2 inch to 8 inch for round galvanized pipe applications.
Hot-Dip or Pre-Galvanized Options
We supply both hot-dip galvanized pipes with heavier zinc coating and pre-galvanized pipes with smooth surface finish according to project needs.
Project-Oriented Supply Support
Threaded ends, grooved ends, cut lengths, bulk packaging, and export documentation can all be customized based on your project requirements.
Reliable Export Experience
Galvanized pipes are widely exported to over 50 countries for scaffolding, construction, water systems, fencing, greenhouse, and industrial framework use.
🏭 Applications of Galvanized Steel Pipe
Galvanized steel pipe is widely used in construction scaffolding, low-pressure water transport, fire fighting systems, fencing, greenhouse structures, irrigation systems, handrails, support structures, electrical conduits, and industrial framework fabrication. It is especially suitable for projects requiring better corrosion resistance than black steel pipe but at a lower cost than stainless steel. In Middle East, Africa, South Asia, and Southeast Asia markets, galvanized pipes remain one of the most commonly imported steel pipe products due to their versatility, long outdoor service life, and competitive cost.
📋 Quality & Certification
Our Certifications
- ✅ ISO 9001:2015
- ✅ CE Marking
- ✅ ABS
- ✅ DNV GL
- ✅ Lloyd's Register (LR)
- ✅ Bureau Veritas (BV)
- ✅ SGS Certified
- ✅ NK
- ✅ RINA
Mill Certificate Type
- 📋 EN 10204 3.1
- 📋 EN 10204 3.2
- 📋 Original Mill Certificate
- 📋 Third Party Inspection Available
- 📋 Certificate of Origin
❓ Frequently Asked Questions
What is galvanized steel pipe?
Galvanized steel pipe is a carbon steel pipe coated with zinc through hot-dip galvanizing or pre-galvanizing process to improve corrosion resistance. It is widely used in water supply, scaffolding, fencing, structural support, and outdoor construction applications.
What is the difference between hot-dip galvanized pipe and pre-galvanized pipe?
Hot-dip galvanized pipe is produced by immersing the finished pipe into molten zinc after pipe manufacturing, resulting in a thicker and more durable zinc coating. Pre-galvanized pipe is formed from already galvanized steel coil, offering smoother appearance but generally lighter zinc coating. Hot-dip galvanized pipe is preferred for more demanding outdoor or humid service conditions.
What standards are available for galvanized steel pipe?
Common standards include BS 1387, EN 10255, ASTM A53, JIS G3452 SGP, and GB/T 3091. Selection depends on the target market, application, pressure requirement, and project specification.
Can galvanized steel pipe be used for water supply systems?
Yes. Galvanized steel pipe is commonly used for low-pressure water distribution systems, especially in construction, municipal works, irrigation, and general utility applications. The zinc coating helps improve service life against atmospheric and water-related corrosion.
What sizes and end finishes are available for galvanized steel pipe?
Galvanized steel pipe is available in sizes from 1/2 inch to 8 inch or larger depending on standard and production line. Standard end finishes include plain end, threaded end, grooved end, and socket connection. Custom lengths and packing solutions are also available.
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Galvanized Steel Pipe
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