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Help CenterPre-Galvanized Steel Pipe 20mm OD 1.5mm Wall Thickness 6m Length Round Tube
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As a leading manufacturer from Hemaokang Steel (Shandong) Co., Ltd., we are proud to present our high-quality Pre-Galvanized Steel Pipe with a 20mm outer diameter, 1.5mm wall thickness, and 6-meter length. This round tube is engineered to meet the rigorous demands of modern construction, plumbing, and industrial applications. Our pre-galvanized process ensures a uniform zinc coating that delivers superior corrosion resistance right from the factory, eliminating the need for post-galvanizing. With a company established in 2025 and an annual export value of US$50–100 million, we guarantee consistent quality and reliable supply for global buyers.
The pre-galvanized steel pipe is manufactured using high-grade carbon steel strips that are cold-formed and then welded using advanced high-frequency induction welding technology. The entire tube is then passed through a hot-dip galvanizing bath, resulting in a smooth, spangle-free zinc layer that adheres tightly to the steel surface. This process ensures excellent protection against rust and environmental factors, making it ideal for both indoor and outdoor use. Each pipe is cut to a precise 6-meter length, and the ends are deburred to ensure safe handling and easy installation.
★ Key Features & Technical Specifications
Our pre-galvanized steel pipe combines strength, durability, and cost-effectiveness. Below is a detailed breakdown of its technical parameters:
| Parameter | Value | Benefit |
| Outer Diameter | 20 mm (0.787 inch) | Standard size for easy integration with fittings |
| Wall Thickness | 1.5 mm (0.059 inch) | Optimal strength-to-weight ratio for structural support |
| Length | 6 meters (19.7 feet) | Reduces joints and installation time |
| Zinc Coating Weight | 40–60 g/m² (customizable) | Enhanced corrosion resistance in humid environments |
| Tensile Strength | ≥ 300 MPa | Reliable for load-bearing applications |
| Surface Finish | Smooth, spangle-free, silver-gray | Aesthetic appeal and easy painting |
| End Treatment | Bevelled or plain (upon request) | Compatible with welding or threaded connections |
★ Detailed Product Advantages
- Superior Corrosion Protection: The pre-galvanized coating acts as a barrier against moisture, chemicals, and atmospheric oxygen, extending the service life of the pipe by up to 50% compared to black steel pipes.
- Uniform Coating Thickness: Our automated galvanizing line ensures consistent zinc coverage (40–60 g/m²), eliminating weak spots that could lead to premature rusting.
- Excellent Workability: The steel base is ductile and can be easily cut, welded, bent, or threaded on-site without damaging the coating. This flexibility reduces labor costs and material waste.
- Cost-Effective Solution: Pre-galvanized pipes are more economical than hot-dip galvanized pipes after fabrication because the galvanizing is done before cutting and welding, saving time and energy.
- Versatile Applications: Ideal for handrails, greenhouses, fences, scaffolding, irrigation systems, HVAC ducts, and structural frames. The 20mm OD is particularly popular for furniture and lightweight construction.
- Quality Assurance: Every batch undergoes rigorous testing including tensile strength, flattening, bend, and hydrostatic pressure tests. Our factory is ISO9001 certified, ensuring consistent quality control.
★ Why Choose Hemaokang Steel?
Since our establishment in 2025, we have rapidly grown into a trusted supplier with an annual export value of US$50 million to US$100 million. Our team of 51–100 experienced professionals operates from our state-of-the-art facility in Liaocheng, Shandong—a region renowned for steel production. We serve markets across North America, South America, Europe, Asia, Africa, and Oceania, demonstrating our global reach and logistics capabilities.
We understand that every project is unique. That’s why we offer customizable options such as different lengths (from 3m to 12m), wall thicknesses (1.0mm to 3.0mm), and zinc coating weights. Our dedicated customer service team provides technical support, sample requests, and fast shipping. With a strong supply chain and inventory management, we can fulfill both small trial orders and large container shipments.
Backed by ISO9001 certification and a commitment to continuous improvement, we deliver products that meet international standards. Our pipes are ideal for contractors, wholesalers, and OEM partners looking for reliable, long-lasting steel solutions. Contact us today for a competitive quote or to request free samples—we are ready to partner with you for success.
Frequently Asked Questions (FAQ)
1. What is the difference between pre-galvanized and hot-dip galvanized pipes?
Pre-galvanized pipes are coated with zinc before fabrication (cutting, welding), resulting in a thinner, uniform coating (typically 40–60 g/m²). Hot-dip galvanized pipes are coated after fabrication, offering a thicker coating (up to 200 g/m²) but at a higher cost. Pre-galvanized is ideal for applications where the pipe will not be heavily exposed to corrosive environments.
2. Can this pipe be used for drinking water systems?
Yes, the zinc coating is non-toxic and safe for water transport. However, for potable water, we recommend checking local regulations. Our pipe can be supplied with a food-grade coating upon request.
3. What is the maximum pressure rating?
For a 20mm OD x 1.5mm wall thickness pipe, the maximum working pressure is approximately 30–40 bar (depending on steel grade). For precise ratings, please consult our technical datasheet.
4. Do you offer samples before bulk order?
Absolutely. We provide free samples (shipping cost may apply) for quality evaluation. Lead time for samples is 3–5 days.
5. How is the pipe packaged for export?
Each pipe is bundled with steel straps, wrapped in waterproof paper, and packed in sea-worthy containers. We can also provide wooden crates for extra protection upon request.
6. Can you customize the length or wall thickness?
Yes, we offer customization. Minimum order quantity for custom specifications is typically 1 ton. Contact our sales team for details.
7. What is the delivery time for a 20-foot container?
Standard delivery time is 15–25 days after deposit, depending on order quantity. We have a large inventory of popular sizes for quick dispatch.
8. Is the pipe suitable for outdoor handrails?
Yes, the pre-galvanized coating provides good resistance to outdoor weather. For coastal or high-humidity areas, we recommend a thicker coating or additional paint.
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