Product Overview
Hot Dipped Galvanized Steel Pipe (HDG Pipe) is a steel pipe coated with a protective zinc layer through a hot-dip galvanizing process at approximately 450°C, forming a strong metallurgical bond between zinc and steel.
Compared with black steel pipe, HDG pipe provides long-term corrosion resistance, lower maintenance cost, and extended service life, making it a preferred solution for global infrastructure, municipal engineering, and industrial pipeline systems.
Technical Specifications
|
Item |
Specification |
|
Product Name |
Hot Dipped Galvanized Steel Pipe |
|
Steel Grade |
Q195 / Q235 / Q345 / ASTM A53 Gr.A/B |
|
Standards |
ASTM A53, ASTM A123, EN 10255, BS 1387, ISO 1461 |
|
OD Range |
21.3 mm – 610 mm (DN15–DN600) |
|
Wall Thickness |
1.2 – 20 mm |
|
Length |
1 – 12 m (customized) |
|
Zinc Coating |
45 – 120 μm (up to 600 g/m²+) |
|
Surface Type |
Spangle / Regular / Zero spangle |
|
End Type |
Plain / Threaded / Beveled / Grooved |
Key Advantages
Long Service Life
Typically 30–50 years depending on environment conditions.
Superior Corrosion Resistance
Zinc coating provides both barrier and sacrificial protection against rust and corrosion.
Cost-Effective Engineering Solution
Lower total lifecycle cost compared to stainless steel pipelines.
Stable Quality for Engineering Projects
Strict production control ensures consistent coating thickness and mechanical performance.
Suitable for Global Standards Projects
Fully compliant with ASTM / EN / BS / ISO standards.
Engineering Applications
Infrastructure & Construction
• Building steel structures
• Scaffolding systems
• Guardrails & support frames
Water & Fire Protection Systems
• Municipal water pipelines
• Fire sprinkler systems
• Drainage systems
Industrial Projects
• Petrochemical facilities
• Power plants
• Cable protection systems
Agricultural Systems
• Greenhouse structures
• Irrigation pipelines
• Farm construction frameworks
HDG Pipe vs Other Steel Pipes
|
Type |
Corrosion Resistance |
Cost |
Lifespan |
Application |
|
HDG Pipe |
★★★★★ |
Medium |
20–50 years |
Outdoor / Industrial |
|
Black Steel Pipe |
★★ |
Low |
3–5 years |
Indoor only |
|
Painted Pipe |
★★★ |
Medium |
5–10 years |
Temporary use |
|
Stainless Steel |
★★★★★ |
High |
50+ years |
High-end systems |
Quality Control System
We implement strict inspection at every stage:
• Chemical composition testing
• Mechanical strength testing
• Hydrostatic pressure testing
• Zinc coating thickness measurement
• Surface adhesion inspection
• Dimensional accuracy control
Third-party inspection (SGS / BV / Intertek) is available upon request.
Manufacturing Process
Raw Material Selection
ERW or seamless steel pipes
Chemical composition inspection
01
Surface Preparation
Degreasing
Acid pickling
Flux treatment for zinc adhesion
02
Hot-Dip Galvanizing
Immersion in molten zinc (~450°C)
Formation of zinc-iron alloy layers
Full internal & external coating
03
Cooling & Finishing
Air cooling / water quenching
Optional anti-white rust treatment
04
Final Inspection
Zinc coating thickness test
Dimensional accuracy check
Surface inspection
Mechanical performance testing
05
Customization Options
We support full customization for project requirements:
• Diameter & wall thickness
• Length (fixed / random / cut-to-length)
• Zinc coating thickness (heavy-duty HDG)
• Thread standards (NPT / BSP / Metric)
• Surface finish control
• Marking & logo printing
• Project packaging requirements
Packaging & Delivery
Packaging
• Steel strip bundled
• Plastic caps
• Waterproof wrapping
• Wooden box (optional)
Retail Big Data
• FOB / CFR / CIF / EXW
• 20ft / 40ft container loading
• Bulk vessel shipment available
Delivery Time
• Standard: 15–30 days
• Urgent orders supported
Why Global Buyers Choose Youcheng
Factory Direct Supply
No middleman, ensuring competitive pricing and stable supply.
EPC Project Experience
We support large-scale infrastructure and industrial pipeline projects.
Strict Quality Control System
Each batch is tested before shipment to ensure consistency and reliability.
Third-Party Inspection Support
SGS / BV / TUV inspection available upon request.
Complete Export Documentation
• EN10204 3.1 / 3.2 Mill Test Certificate
• Certificate of Origin
• Packing List & Invoice
• Inspection Reports
Fast Response & Delivery
Quick quotation and efficient production scheduling for urgent projects.
Our Certificate
Frequently Asked Questions
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