Galvanized Steel Pipe Thickness 1mm to 12mm ASTM JIS Q235 S235jr S355j2 Round Square Welded Seamless Carbon Stainless Steel
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
7-15days
Product Description
Factory Hot Sale Galvanized Steel Pipe
Galvanized steel pipe is a specialized tubular product manufactured by applying a zinc coating to the surface of carbon steel pipes through hot-dip or electroplating processes. The zinc coating forms a sacrificial anode protection layer, effectively isolating the steel substrate from air and moisture, thereby significantly enhancing corrosion resistance. With the advantages of cost-effectiveness, reliable mechanical properties, and easy installation, it is widely used in construction, water supply and drainage, fire protection, agricultural irrigation, and industrial fluid transportation.
Core Classification
By Galvanizing Process
| Galvanizing Process | Coating Formation | Zinc Coating Index | Core Properties | Service Life | Application Scope |
|---|---|---|---|---|---|
| Hot-Dip Galvanizing (HDG) | Immerse pickled steel pipes in molten zinc (440-460ºC) | Thickness: ≥80μm (average ≥640g/m²) | Strong coating adhesion, excellent corrosion resistance, wear-resistant | 20-50 years (outdoor environment) | Fire protection pipes, water supply pipes, structural supports, marine engineering |
| Electro-Galvanizing (EG) | Deposit zinc ions through electrolysis | Thickness: 10-50μm (10-50g/m²) | Weak adhesion, poor corrosion resistance, easy to peel off | 3-8 years (indoor dry environment) | Indoor decorative pipes, non-critical low-pressure fluid pipes |
By Base Steel Grade
- Common Carbon Steel Grades: Q195/Q215 (low strength), Q235 (balanced), Q345 (high strength)
- Special Function Grades: Anti-corrosion alloy steel, high-temperature resistant steel, low-temperature resistant steel
Technical Specifications & Standards
Critical Technical Parameters (Hot-Dip Galvanized)
| Parameter Category | Typical Range (Q235 HDG) | Measurement Standard |
|---|---|---|
| Outer Diameter (OD) | DN15 (φ21.3mm) - DN300 (φ323.9mm) | ASTM A53, GB/T 3091 |
| Wall Thickness (WT) | 1.2mm - 12.0mm | ASTM A53, EN 10255 |
| Length | 6m/12m (standard); 3-18m (customizable) | Customer requirement |
| Mechanical Properties | Tensile strength: 375-500MPa; Yield strength: ≥235MPa | ASTM A53, GB/T 3091 |
| Zinc Coating Performance | Adhesion: No peeling after 180° bending | ASTM B117, ISO 9227 |
International Standards
- North America: ASTM A53/A53M, ASTM A123
- Europe: EN 10255, EN ISO 1461
- China: GB/T 3091-2015, GB/T 13912
- Japan: JIS G3444, JIS G3302
Application Scenarios
- Construction & Municipal Engineering: Fire protection systems, water supply, structural supports
- Agriculture & Irrigation: Farm irrigation, sprinkler systems
- Industrial Fluid Transport: Low-pressure oil, chemical reagents, high-pressure air
- Marine & Coastal Engineering: Seawater cooling systems, coastal building water supply
- Decorative & Furniture: Indoor railings, furniture frames
Quality Control & Procurement
Key Procurement Terms
- Clearly specify "hot-dip galvanized" (HDG) or "electro-galvanized" (EG)
- Define base steel grade and specifications
- Specify minimum zinc coating thickness for critical applications
- Request certification and documentation (MTR, ISO 9001, third-party inspection)
- Proper packaging and marking for transport
Quality Inspection Focus
- Visual inspection for zinc coating defects
- Dimensional and coating thickness testing
- Adhesion and corrosion testing
- Mechanical and pressure testing
Product Images
Frequently Asked Questions
Q1: Why choose us?
Our company, as an internationally experienced and professional supplier, has been engaged in steel business for more than ten years. We can provide a variety of steel products with high quality to our clients.
Q2: Can you provide OEM/ODM service?
Yes. Please feel free to contact us for more details.
Q3: What is your terms of payment?
100% T/T advance. 30% T/T and balance against copy of documents. 30% T/T advance, balance L/C at sight.
Q4: Can we visit your factory?
Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case.
Q5: Can you provide sample?
Yes. Sample is free for regular sizes, but the buyer needs to pay freight cost.
Q6: How long is your delivery time?
Regular lead time is 15 to 30 days after receiving deposit.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Jiangsu Xinyuanxing Metal Products Co.,Ltd
Location
Liangxi District Wuxi ,Jiangsu,China.
Contact Person
Helen