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Help CenterPre-Galvanized Steel Pipe Round Section OD 20-120mm Zinc Coating 80-275g/m2 ERW Welded 6m Length
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Founded as a dedicated steel pipe supplier, Hemaokang Steel (Shandong) Co., Ltd. specializes in manufacturing pre-galvanized welded pipes that meet the needs of global construction and industrial customers. Our round-section ERW steel pipe with an outside diameter of 20-120mm and zinc coating of 80-275g/m2 is designed to provide dependable performance in a wide range of applications. With a standard length of 6 meters and smooth surface finish, this pipe offers a convenient and cost-effective solution for projects that require corrosion protection and accurate dimensions.
The pipe is produced using high-frequency electric resistance welding (ERW), which ensures uniform wall thickness and a strong weld line. After forming, the pipe is subjected to a pre-galvanizing process that deposits a protective zinc layer on the surface, effectively shielding the steel from moisture, chemicals, and atmospheric corrosion. The pre-galvanized finish also allows for easy painting and welding in downstream operations. Available with zinc coatings from 80 to 275g/m2, the pipe can be selected to suit different environmental exposures, from indoor frame uses to outdoor fencing and agricultural structures.
- Round section design – symmetric geometry provides excellent strength-to-weight ratio and simplifies jointing and fitting in structural applications.
- Wide diameter range – outer diameters from 20mm to 120mm are available, making it easy to match project specifications for handrails, scaffolds, machine frames, and piping systems.
- Adjustable zinc coating – zinc coating options from 80 to 275g/m2 offer tailored corrosion resistance for various service environments and expected service life.
- ERW welding technology – high-frequency welded seams create a smooth, continuous structure with high burst pressure and reliable forming characteristics.
- Standard 6-meter length – long lengths reduce the number of joints and minimize installation time and material waste.
- Pre-galvanized surface – clean and bright surface finish improves aesthetic appearance and is ideal for further fabrication, including threading, grooving, and drilling.
- Consistent quality – strict dimensional control enables easy matching with standard pipe fittings and flanges, lowering total installation costs.
The following table provides a quick overview of the available specifications:
| Parameter | Value |
|---|---|
| Outer Diameter | 20-120 mm |
| Length | 6 m (customizable) |
| Zinc Coating | 80-275 g/m2 |
| Welding Type | ERW |
| Shape | Round |
| Surface Treatment | Pre-galvanized |
| Material | Carbon Steel |
| Quality System | ISO9001 |
These pre-galvanized steel pipes are widely used in many sectors, including:
- Construction – scaffolding systems, handrails, guardrails, steel frames, and structural supports.
- Agriculture – greenhouse frames, livestock fencing, irrigation pipelines, and equipment racks.
- Machinery – conveyor frames, machine guards, tool handles, and light-duty load bearing structures.
- Pipe accessories – couplings, elbows, flanges, and valve systems in low-pressure fluid handling.
- Furniture and decoration – chair frames, display stands, shelving units, and modern industrial decor.
At Hemaokang Steel, quality is ensured through every stage of production. We operate under an ISO9001 quality management system, covering incoming raw material inspection, pipe forming, welding, galvanizing, and final packing. Dimensional checks, visual inspection, and coating thickness measurements are performed regularly to confirm that the delivered pipes meet the agreed specifications. Our quality team monitors welding parameters and galvanizing line conditions closely, which helps maintain a consistent product performance across every batch.
Choosing our pre-galvanized steel pipe brings clear benefits:
- Reliable and uniform product quality supported by strict process control.
- Flexible customization of outer diameter, thickness, length, zinc coating, and end finish according to project requirements.
- Secure export packing in bundles or wooden cases to avoid rust and damage during sea transportation.
- Timely production and delivery with resourceful supply chain management in Shandong.
- Competitive factory prices with transparent quotation and responsive communication.
Hemaokang Steel (Shandong) Co., Ltd. was established in 2025 and has achieved an annual export value of US$50-100 million with a dedicated team of 51-100 employees. Located in Liaocheng, Shandong, we are surrounded by a strong steel production ecosystem and have convenient access to Qingdao port, which allows us to arrange worldwide shipments efficiently. Our products are currently exported to North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, Western Europe, and many other regions. With ISO9001 certification and a customer-oriented philosophy, we aim to build long-term partnerships with global buyers. Feel free to contact us for detailed quotations, sample support, and customized production assistance.
Frequently Asked Questions
Q1: What is the minimum order quantity for these pipes?
A: The MOQ depends on the diameter and zinc coating. For standard sizes, we can arrange small trial orders. Please contact us to confirm the exact quantity for your project.
Q2: Can I get custom lengths or diameters?
A: Yes, we offer customization of outer diameter, wall thickness, length, and zinc coating. Custom requirements can be discussed with our engineering team to match your application details.
Q3: What is the difference between pre-galvanized and hot-dip galvanized steel pipe?
A: Pre-galvanized pipe is galvanized in a continuous process before welding or cutting, providing a uniform coating on the surface. Hot-dip galvanized pipe is immersed after fabrication, creating a thicker but less uniform layer. Both are suitable for different environmental and budget conditions.
Q4: Can this pipe be used for water supply systems?
A: Yes, it can be used in low-pressure fluid handling and water supply applications, provided the working pressure and pipe specifications are properly matched. Please consult our engineers for detailed recommendations.
Q5: How can I verify the zinc coating thickness?
A: Coating thickness can be measured by magnetic thickness gauges or cross-section inspection. We can provide test reports and samples for verification before shipment.
Q6: What kind of packing does your company provide?
A: Standard packing includes steel straps, protective end caps, and moisture-proof paper or plastic wrapping. Bundles or wooden cases are available for different transportation methods.
Q7: Can I receive a sample before placing a bulk order?
A: Yes, samples are available upon request. We can prepare a small length sample for your quality evaluation, and freight costs are usually borne by the buyer.
Q8: What certifications does your company have?
A: Our production management system is ISO9001 certified. We also provide material and inspection documents to meet specialized project requirements.
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