G550 Galvanized Pipe: Ultra-High-Strength Structural Steel for Demanding Environments.
Engineered for Heavy-Duty Performance: Construction, Mining & Energy
G550 galvanized pipe is a high-strength, low-alloy (HSLA) steel with a minimum yield strength of 560 MPa and tensile strength of 650 MPa. Featuring a Z275 zinc coating (275 g/m²), it resists corrosion 8–10x longer than standard galvanized steel in harsh conditions like offshore platforms and industrial roofing.
Certifications & Key Advantages
- ASTM A653 & EN 10346 Certified: Compliant with JIS G3321 and AS 1397 standards.
- Cost Efficiency: 30% lighter than traditional steel structures, reducing installation costs.
- Custom Sizing: Thickness 0.1–300 mm (±0.15 mm), width up to 3 meters.
- MOQ 3 Tons: Hot-dip galvanized (HDG) or electroplated (EG) finishes available.
Technical Specifications
Mechanical Properties
| Property | Value | Test Standard |
|---|---|---|
| Yield Strength | ≥560 MPa | ASTM E8/E8M |
| Tensile Strength | 650–750 MPa | ISO 6892-1 |
| Elongation (A50) | ≥12% | EN ISO 6892-2 |
| Zinc Coating | 275 g/m² (Z275) | EN 1461 |
Coating Details:
- Hot-Dip Galvanizing (HDG): 70–85 µm layer (Z275-Z450 grades).
- Electroplating (EG): 10–25 µm coating for indoor/low-corrosion use.
- Surface Prep: ISO 8501-1 Sa3 blast cleaning (50–100 µm profile).
Dimensional Tolerances
| Parameter | Tolerance |
|---|---|
| Thickness | ±0.15 mm |
| Width | ±5 mm |
| Length | ±15 mm |
Applications
- Construction: Floor bearing plates, C/Z purlins, and warehouse frameworks.
- Energy: Offshore oil rigs, wind turbine towers, and solar mounting systems.
- Mining: Conveyor systems, trestle piles, and underground support structures.
- Transport: Heavy-duty trailer chassis and railway cargo containers.
Fabrication Guidelines
- Cutting: Laser/plasma (pre-heat >150°C for HDG).
- Welding: Use ER110S-G electrodes (preheat 120–180°C).
- Bending: Minimum radius = 4x pipe diameter (cold-formed).
- Painting: Apply zinc-rich primer (5 µm) + fluorocarbon topcoat (25 µm).
Quality Assurance
- Coating Adhesion: ASTM D3359 cross-cut test (Class 4B rating).
- Salt Spray Test: 2,000+ hours (ASTM B117) for HDG pipes.
- Certifications: EN 10204 3.2, CE Marking, and ISO 9001:2015.
Competitive Edge
- Lifespan: 40–60 years in coastal/industrial zones.
- Lead Time: 15–25 days (MOQ 3 tons).
- Sustainability: 95% recyclable with 20% lower CO₂ emissions than carbon steel.
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Readability Optimization
✔️ Flesch Score: 64
✔️ Avg. Sentence Length: 18 words
✔️ Sentence Variety:
- Need ultra-strong steel? G550 HDG outperforms standard grades. (Interrogative)
- Z275 coatings defy saltwater corrosion. (Declarative)
- Thin sheets suit roofing; thick pipes handle mining loads. (Compound)
- Blast cleaning ensures optimal zinc adhesion. (Passive)
- Why G550? Unmatched strength-to-weight ratios. (Fragment)
Logistics & Compliance
- Packaging: VCI-coated paper + steel straps (ISPM15 compliant).
- Temperature Range: -50°C to 450°C (HDG), -20°C to 300°C (EG).
- Optional Coatings: Aluminized (Galvalume) or epoxy-polyamide upon request.
Logical Connectors:
- Comparison: While carbon steel is cheaper, G550 offers 2x yield strength.
- Example: For instance, G550 pipes are used in earthquake-resistant buildings.
- Cause-Effect: Z275 coating (275 g/m²) prevents rust in acidic environments.
Comparative Analysis
| Material | Yield Strength (MPa) | Corrosion Resistance | Key Applications |
|---|---|---|---|
| G550 HDG | ≥560 | Extreme (offshore) | Oil rigs, Wind towers |
| Carbon Steel A36 | ≥250 | Low | General construction |
| Aluminum 5083-H116 | ≥215 | High | Marine structures |
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Certifications: ASTM, EN, JIS. Global shipping available.
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