Galvanized Welded Steel Pipe
Product Name： Galvanized Welded Steel Pipe
Standard：GB/T 3091 – 2015、ASTM A53、BS 1387
Grade： Grade A、Grade B
Surface： Hot – dip galvanized; Electro – galvanized
Technique：electric resistance welding (ERW) or submerged arc welding (SAW), then galvanized
Thickness： 1.2mm- 6.0mm
Width ： 1/2 inch (12.7mm) -48 inches (1219.2mm)
Application： Building construction (plumbing, scaffolding); Infrastructure (water supply, sewage); Industrial fields (fluid transportation); Agriculture (irrigation systems)
Product Overview
Galvanized Welded Steel Pipe begins with high – quality steel plates or strips. These materials are precisely shaped and joined together through advanced welding techniques, such as electric resistance welding (ERW) or submerged arc welding (SAW). The welding process ensures a seamless and sturdy pipe structure, capable of withstanding significant pressure and mechanical stress.
After welding, the pipes undergo the galvanization process. There are mainly two methods: hot – dip galvanizing and electro – galvanizing. In hot – dip galvanizing, the pipes are immersed in a bath of molten zinc at high temperatures, creating a thick and durable zinc – iron alloy layer on the surface. This provides excellent corrosion resistance, even in harsh environments. Electro – galvanizing, on the other hand, deposits a zinc layer on the pipe surface through an electrolytic process, resulting in a relatively thinner but smoother coating, which is suitable for applications where a more aesthetic appearance is required. The coating provides a protective layer that prevents rust and extends the lifespan of the pipes, especially in environments that experience moisture, humidity, or industrial chemicals. These pipes are widely used for water transportation, structural applications, and as a material for scaffolding, fences, and plumbing systems. The welded joint provides strength and durability, and the galvanized coating ensures resistance to corrosion, extending the life of the pipe and reducing maintenance costs.
Galvanized Welded Steel Pipes – Technical Parameters
| Parameter | Description |
| Material | Carbon Steel, Alloy Steel, Stainless Steel |
| Outer Diameter (OD) | 21.3 mm (1/2”) to 610 mm (24”) |
| Wall Thickness | 1.0 mm to 20 mm |
| Length | Customizable (Standard: 6 meters or 12 meters) |
| Zinc Coating Thickness | 40 µm to 600 µm (Hot-Dip), 5 µm to 15 µm (Electro) |
| Tensile Strength | ≥ 250 MPa |
| Yield Strength | ≥ 235 MPa |
| Surface Finish | Smooth, uniform galvanized coating |
| Corrosion Resistance | Excellent (Hot-Dip Galvanized), Moderate (Electro) |
| Weight | Varies by pipe size and thickness |
Product Characteristics
Excellent Corrosion Resistance：The galvanized layer acts as a protective barrier, effectively preventing the intrusion of moisture, oxygen, and other corrosive substances, ensuring the pipe’s integrity over long periods.
High Strength and Durability：Thanks to the welding process and high – quality steel materials, the pipe can bear heavy loads and high pressures, maintaining stable performance in various working conditions.
Versatile Sizes：Available in a wide range of diameters, wall thicknesses, and lengths, it can meet diverse project requirements, whether for small – scale residential construction or large – scale industrial projects.
Easy Installation：The standardized dimensions and connection methods, such as threading, grooving, or welding, make the installation process convenient and efficient, reducing construction time and costs.
Cost – effective：Compared with some high – end corrosion – resistant pipes, Galvanized Welded Steel Pipe offers a good balance between performance and cost, providing reliable quality at a more affordable price.
Customizable Lengths： Available in custom lengths to meet the specific requirements of a project, making them versatile for various installations.
Application Areas
Water Supply Systems: Galvanized welded steel pipes are commonly used for potable water transportation, ensuring safe and reliable water delivery in residential, commercial, and industrial buildings.
Plumbing Systems: Ideal for indoor and outdoor plumbing systems, offering a reliable, long-lasting solution for water distribution and waste management.
Construction & Structural Supports: Used in scaffolding, handrails, and other structural applications due to their strength and durability.
Fencing: Widely used for making durable fences for both commercial and residential purposes, providing security and aesthetic appeal.
Agricultural Applications: These pipes are used in irrigation systems, greenhouses, and agricultural frameworks where rust resistance is crucial.
Outdoor Installations: Suitable for outdoor applications that require resistance to rust, such as transportation of gas, oil, or other fluids in industrial settings.
HVAC Systems: Used for heating, ventilation, and air conditioning ductwork, providing long-lasting, corrosion-resistant piping for air distribution.
Structural Steel
Railing
Fences
Irrigation Systems
Construction
Plumbing
What are the differences between Galvanized Welded Steel Pipe and other Galvanized Pipes?
| Feature | Galvanized Welded Steel Pipe | Galvanized Seamless Steel Pipe | Electric Resistance Welded (ERW) Galvanized Pipe |
| Manufacturing Process | Welding and galvanization | Made from solid steel billet then galvanized | Electric resistance welding + galvanization |
| Zinc Coating Thickness | 40 µm to 600 µm (Hot-Dip), 5 µm to 15 µm (Electro) | 40 µm to 100 µm (Hot-Dip), 5 µm to 15 µm (Electro) | 40 µm to 600 µm (Hot-Dip), 5 µm to 15 µm (Electro) |
| Corrosion Resistance | Excellent (Hot-Dip), Moderate (Electro) | High (due to thicker coating) | Moderate to High |
| Strength | High (welded joint + steel strength) | Very high (stronger due to thicker coating) | Moderate (welded seam) |
| Cost | Medium (affordable compared to stainless steel) | Higher (due to coating process) | Medium (affordable, but generally more cost-effective than hot-dip) |
| Weight | Moderate | Lighter (no welded seam, more uniform structure) | Moderate to Heavy |
| Applications | Water systems, plumbing, structural support, fencing | High-pressure gas pipelines, oil pipelines, power plant systems | Water supply, plumbing, HVAC, scaffolding, general construction |
| Lifespan | Long-lasting (depending on coating type) | Long-lasting (due to thicker coating) | Medium (depends on thickness and coating method) |
Why Choose Gengfei Steel’s Galvanized Welded Steel Pipes?
Excellent quality: From raw material selection to finished product inspection, we always follow strict quality control standards throughout the entire production process. Our galvanized pipe products meet international standards such as ASTM A53, BS 1387, EN 10217, JIS, etc., ensuring first-class quality.
Advanced manufacturing process: Our pipes are precision welded and undergo a comprehensive galvanizing process to ensure a uniform and strong galvanized layer.
Customized solutions: We provide customizable pipe length, thickness and galvanizing options to meet your specific project needs.
Excellent corrosion resistance: Our galvanized pipes have excellent anti-corrosion properties and can ensure long service life even in harsh environments.
Affordable: Our products are priced very competitively, providing you with high-quality, long-lasting and durable solutions at an affordable price.
On-time delivery: We ensure on-time delivery to ensure that your project goes on schedule.
Experienced team: Our team of experts are always available to answer any questions you have and provide you with the best galvanized welded pipe solutions.
