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Help CenterSch40 Galvanized Steel Pipe 1.5 Inch 2.5 Inch 4 Inch GI Pipe Q195 Q235 200g/m2 Zinc Coating ERW
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Hemaokang Steel (Shandong) Co., Ltd. proudly presents our premium Sch40 Galvanized Steel Pipe in popular diameters of 1.5 inch, 2.5 inch, and 4 inch. Manufactured from high-quality Q195 and Q235 steel, these GI pipes undergo a rigorous ERW (Electric Resistance Welding) process and are hot-dipped galvanized with a zinc coating of 200g/m², ensuring excellent corrosion resistance and long service life. As a trusted supplier with ISO9001 certification and annual export values exceeding US$50 million, we deliver pipes that meet international standards for durability and performance.
Our Sch40 galvanized pipes are designed for a wide range of applications including water distribution, structural support, fencing, scaffolding, and agricultural greenhouse frames. The combination of ERW precision and heavy-duty galvanization provides a robust product that withstands harsh environments while maintaining structural integrity. With a dedicated team of 51-100 employees and a global reach spanning North America, Europe, Asia, Africa, and Oceania, Hemaokang Steel ensures reliable supply chain and consistent quality.
Key Features & Technical Specifications
- Material Grades: Q195 and Q235 steel – excellent weldability and tensile strength.
- Pipe Schedule: Sch40 (Schedule 40) – standard wall thickness for medium-pressure applications.
- Zinc Coating: 200g/m² (average) – hot-dip galvanized inside and out for superior anti-corrosion.
- Manufacturing Process: ERW (Electric Resistance Welding) – precise seam, smooth surface, uniform wall.
- Available Diameters: 1.5 inch (DN40), 2.5 inch (DN65), 4 inch (DN100) – other sizes available upon request.
- Standard Length: 6 meters (other lengths customizable).
- End Finish: Plain ends, beveled ends, or threaded options available.
- Certification: ISO9001:2015 quality management system.
| Parameter | Specification |
|---|---|
| Material | Q195, Q235 |
| Standard | ASTM A53, BS 1387, GB/T 3091 |
| Zinc Coating Weight | 200 g/m² (average) |
| Wall Thickness (Sch40) | 1.5″: 3.68 mm | 2.5″: 4.05 mm | 4″: 4.78 mm |
| Yield Strength | ≥ 235 MPa (Q235) |
| Tensile Strength | 370–500 MPa (Q235) |
| Hydrostatic Test | Passed (3.5 MPa) |
Advantages & Customer Benefits
- Corrosion Resistance: The 200g/m² zinc coating provides long-lasting protection against rust and weathering, extending the pipe’s lifespan in outdoor and humid environments.
- Structural Strength: Q235 steel with Sch40 wall thickness ensures the pipe can handle medium-pressure fluid transport and structural loads without deformation.
- Cost-Effective: ERW manufacturing offers a seamless-like quality at a lower cost than seamless pipes, making it an economical choice for bulk projects.
- Easy Installation: Smooth surface and uniform dimensions allow for simple cutting, threading, welding, and coupling on site.
- Versatility: Suitable for water supply lines, irrigation, fencing, scaffolding, handrails, greenhouse frames, and more.
- Customizable Options: We offer various lengths, end finishes (plain, beveled, threaded), and additional coatings upon request.
Why Choose Hemaokang Steel?
Established in 2025, Hemaokang Steel (Shandong) Co., Ltd. has quickly become a reliable partner in the global steel market. With an annual export value of US$50 million to US$100 million and a workforce of 51–100 experienced professionals, we are committed to delivering high-quality products on time. Our ISO9001 certification reflects our dedication to consistent quality control, from raw material selection to final inspection.
We serve a diverse clientele across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, East Asia, Western Europe, Central America, Northern Europe, Southern Europe, and South Asia, as well as the domestic market. Our strategic location in Liaocheng, Shandong – a major steel hub in China – enables us to offer competitive pricing and efficient logistics. Every batch of Sch40 galvanized steel pipe undergoes strict hydrostatic testing, dimensional checks, and zinc coating thickness verification to ensure full compliance with international standards.
By choosing Hemaokang Steel, you gain a partner who prioritizes quality, reliability, and customer satisfaction. Whether you need a large quantity for a construction project or a custom order for a specialized application, we are ready to support you with technical advice and flexible solutions. Contact us today for a quote or product samples, and experience the difference that professional steel supply makes.
Frequently Asked Questions
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Q: What does “Sch40” mean in galvanized steel pipe?
A: Sch40 refers to Schedule 40, a standard wall thickness defined by ANSI/ASTM. It is a common schedule for medium-pressure applications, offering a balance of strength and weight. Our Sch40 pipes have specific wall thicknesses for each diameter (e.g., 1.5″: 3.68 mm). -
Q: Can I order the pipe in lengths other than 6 meters?
A: Yes, we can customize lengths according to your project requirements. Custom lengths are available upon request, and we can also provide precut pieces. -
Q: What is the difference between Q195 and Q235 steel for these pipes?
A: Q195 has lower yield strength (195 MPa) and is more ductile, suitable for bending and forming. Q235 has higher strength (235 MPa) and is commonly used for structural applications. Both are available, and we can advise based on your specific use. -
Q: Is the zinc coating 200g/m² on both the inside and outside?
A: Our hot-dip galvanizing process coats both the interior and exterior surfaces uniformly. The 200g/m² average refers to the total coating weight; the coating thickness is typically around 14–28 microns per side. -
Q: What certifications do you have for quality assurance?
A: We are ISO9001 certified, ensuring that our manufacturing and quality control processes meet international standards. We also provide mill test certificates (MTC) with each shipment. -
Q: Can these pipes be used for high-pressure gas or oil lines?
A: Sch40 galvanized pipes are typically used for water, air, and low-pressure applications. For high-pressure gas or oil, seamless pipes or higher schedule (e.g., Sch80) may be required. Please consult our technical team for your specific pressure requirements. -
Q: Do you offer threaded ends or couplings?
A: Yes, we can supply pipes with plain ends, beveled ends, or threaded ends. Couplings and other fittings are also available as optional accessories. -
Q: What is your minimum order quantity (MOQ) for these pipes?
A: Our MOQ is typically 1 ton per size, but we can accommodate smaller trial orders for new customers. Contact us for details.
Contact Hemaokang Steel today to discuss your project needs and get a competitive quote!
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