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Help CenterASTM A53 Grade B Hot Dip Galvanized Steel Pipe Round OD 88.9mm Wall 5.5mm ERW 6 Meter
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Welcome to Hemaokang Steel (Shandong) Co., Ltd., a reliable manufacturer based in Liaocheng, Shandong, China. We specialize in producing carbon steel pipes that meet international standards. Our ASTM A53 Grade B Hot Dip Galvanized Steel Pipe with OD 88.9mm and wall thickness 5.5mm is a robust solution for demanding applications. This pipe combines the strength of Grade B steel with excellent corrosion resistance from hot-dip galvanizing, ensuring long service life and low maintenance.
This product is manufactured using advanced ERW (Electric Resistance Welding) technology, producing a consistent weld seam with high structural integrity. The 6-meter fixed length offers convenience for transportation and installation. Whether you need pipes for structural framing, fencing, water transmission, or general engineering, this galvanized steel pipe delivers dependable performance and easy welding capabilities.
Key Features & Benefits
- Superior Corrosion Resistance: Hot-dip galvanized coating provides a protective zinc layer, ideal for outdoor and humid environments.
- High Strength: ASTM A53 Grade B ensures minimum yield strength of 240 MPa and tensile strength of 415 MPa, suitable for structural loads.
- Precise Dimensions: Outer diameter 88.9mm and wall thickness 5.5mm are controlled to tight tolerances for reliable fitting.
- ERW Manufacturing: High-frequency resistance welding creates a smooth and strong longitudinal seam, tested for integrity.
- 6 Meter Fixed Length: Reduces the need for onsite splicing and minimizes material waste.
- Easy Surface Inspection: The smooth zinc finish allows quick visual quality checks.
- Wide Compatibility: Can be welded, threaded, or grooved for different connection methods.
- Cost-Effective Solution: Galvanized pipes offer lower lifetime cost compared to painted or bare pipes.
Technical Specifications
| Standard | ASTM A53 |
| Grade | B |
| Outer Diameter | 88.9 mm (3.5 inch approx.) |
| Wall Thickness | 5.5 mm |
| Length | 6 meters (customizable upon request) |
| Surface Treatment | Hot dip galvanized (zinc coating optional) |
| Pipe Type | ERW (Electric Resistance Welded) |
| End Finish | Plain end, bevel end, or threaded (optional) |
| Tolerance | OD tolerance: ±1% ; WT tolerance: ±10% (typical) |
Quality Assurance
Our manufacturing process follows strict quality control procedures. Each pipe is inspected to verify chemical composition, mechanical properties, dimensional accuracy, and coating uniformity. The weld seam is subjected to non-destructive testing or hydrostatic testing to ensure structural soundness. We are proud to hold ISO9001 certification, which confirms our commitment to consistent quality management systems.
Application Areas
- Construction and building structures
- Road & bridge guardrails
- Water and oil transmission pipelines
- Machinery frames and equipment supports
- Greenhouse and agricultural structures
- Telecommunication towers and antennas
- Fencing and railing systems
Why Choose Hemaokang Steel?
Hemaokang Steel (Shandong) Co., Ltd. was established in 2025 but has quickly built a strong export network with annual export values between US$50 Million and US$100 Million. Our team of 51-100 experienced staff ensures efficient production and professional customer support. Located in Liaocheng, Shandong, we enjoy convenient access to Qingdao Port, allowing prompt shipment to markets across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We offer materials certificates, mill test reports, and dedicated after-sales service.
When you order from us, you receive a combination of competitive factory pricing, reliable lead times, and consistent product quality. We are ready to accommodate special packaging, custom lengths, and other value-added services according to your request. Contact us today for a quotation or more detailed information about our ASTM A53 Grade B galvanized ERW pipes.
Frequently Asked Questions
The zinc coating weight can be tailored to your project requirements. Standard options range from 200 to 500 g/m². Please contact us to specify your desired coating thickness, and we will supply accordingly.
Yes, every production batch can be accompanied by a mill test certificate (EN 10204 3.1 or similar) that lists chemical composition, mechanical properties, and other test results. We also support third-party inspections when required.
While our standard is 6 meters, we also offer other lengths such as 5.8m, 11.8m, or random lengths depending on your order. Custom cutting to your exact specifications is available upon request.
Typically, the MOQ is 5 tons. For regular customers or project-based orders, we can be flexible. Feel free to discuss your volume with our sales team.
The ERW process is carefully controlled with real-time monitoring. The pipes undergo hydrostatic testing, eddy current testing, or ultrasonic testing to confirm the weld integrity. Certificates of testing are provided as part of the quality documentation.
Yes, hot-dip galvanized pipes have been widely used for water supply lines. However, local regulations and water chemistry should be considered. We recommend consulting your project engineer for specific requirements.
In most outdoor applications, the zinc coating itself provides sufficient protection. If you prefer to paint, the surface can be significantly roughened or pretreated to improve paint adhesion. This is optional.
Pipes are typically packed in bundles with steel strapping, waterproof wrapping, and protective end caps. For containers, we can also use loose loading or custom crates depending on your preferences.
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