Classification
Hot-dip galvanized steel pipe: immerse the steel pipe in molten zinc liquid to make a uniform and dense zinc layer attached to the surface of the steel pipe. Its zinc layer is thicker, has good corrosion resistance, and has a long service life. It is suitable for occasions with high corrosion resistance requirements, such as fire protection pipes, water supply and drainage pipes, etc.
Electro-galvanized steel pipe: Through the principle of electrolysis, a zinc layer is deposited on the surface of the steel pipe. The electroplated zinc layer is uniform, smooth, and has good appearance quality, but the zinc layer is thin and has relatively weak corrosion resistance. It is often used in occasions that do not require particularly high corrosion resistance and pay attention to appearance, such as furniture, railings, etc.
Production process
Hot-dip galvanizing: includes pickling, water washing, plating assistance, drying, hot-dip plating, cooling, passivation and other processes. Pickling can remove rust and oil stains on the surface of the steel pipe, and plating assistance can improve the adhesion of the zinc layer. Hot-dip plating is to immerse the treated steel pipe in zinc liquid to react with the iron matrix to form a zinc-iron alloy layer and a pure zinc layer. Finally, through cooling and passivation treatment, the corrosion resistance and surface quality of the zinc layer are improved.
Electrogalvanizing: mainly includes degreasing, pickling, activation, electroplating, passivation and other steps. Degreasing can remove grease on the surface of steel pipes, pickling is used to remove oxide scale, activation can improve the activity of the steel pipe surface, and zinc ions are deposited on the surface of steel pipes under the action of DC electric field during electroplating to form a zinc layer. Passivation treatment can improve the corrosion resistance and anti-discoloration ability of the zinc layer.
Performance characteristics
Strong corrosion resistance: The zinc layer can effectively isolate the steel pipe from contact with corrosive media such as air and water, prevent the steel pipe from rusting, and extend the service life.
High mechanical strength: The steel pipe itself has high strength and toughness. After galvanizing, its mechanical properties are basically unaffected and can still withstand greater pressure and external force.
Beautiful surface: The surface of the galvanized layer is smooth and bright, with good decorative properties, which can meet the appearance requirements of different occasions.
Good processing performance: Galvanized steel pipes can be bent, welded, cut and other processes. The processing performance is similar to that of ordinary steel pipes, which is easy to install and use.
Application fields
Construction industry: used for water supply and drainage systems, fire protection systems, gas pipelines, etc., in buildings, and can also be used as supporting pipes in building structures, such as scaffolding.
Machinery manufacturing: manufacturing various mechanical parts, pipelines, etc., such as oil pipes and gas pipes in automobile manufacturing and material transportation pipelines in industrial equipment.
Power industry: As a protective casing for wires and cables, it can effectively protect wires and cables from erosion by the external environment and improve the safety and reliability of power transmission.
Agriculture: Pipes used in irrigation systems, the corrosion-resistant properties enable them to adapt to different soil and water conditions, extending the service life of irrigation pipes.
Types of Galvanized Pipe
When it comes to corrosion-resistant piping solutions, galvanized pipes remain a cornerstone across industries. At Yulong, we specialize in manufacturing premium galvanized pipes tailored to diverse applications. From heavy-duty industrial projects to precision custom designs, our products combine zinc-coated protection with unmatched structural integrity. Below, explore the key types of galvanized pipes and discover how Yulong delivers solutions that outperform expectations.
Industrial Galvanized Pipe
Industrial galvanized pipes are engineered for extreme environments. The hot-dip galvanizing process creates a thick zinc layer, ensuring resistance to rust, chemicals, and high-pressure conditions. Ideal for factories, chemical plants, and construction sites, Yulong’s industrial-grade pipes meet ASTM/ISO certifications. Our pipes support HVAC systems, scaffolding, and machinery frameworks, offering decades of maintenance-free performance even under heavy loads.
Inside Galvanized Pipe
For applications requiring interior corrosion protection, inside galvanized pipes are the go-to choice. These pipes feature a smooth, zinc-coated inner surface to prevent mineral buildup and contamination—critical for water supply lines, food processing, and pharmaceutical industries. Yulong’s precision manufacturing ensures uniform coating thickness, enhancing flow efficiency and longevity.
Galvanized Pipe Outside
Exterior-focused galvanized pipes prioritize outdoor durability. The outer zinc layer shields against UV exposure, moisture, and temperature fluctuations, making them perfect for fencing, handrails, and underground installations. Yulong uses advanced galvanizing techniques to prevent peeling or cracking, ensuring structural aesthetics and safety in harsh weather conditions.
Round Galvanized Pipe
Round galvanized pipes are synonymous with versatility. Their circular cross-section provides excellent load distribution, ideal for automotive parts, agricultural equipment, and DIY projects. Yulong offers round pipes in multiple diameters and gauges, crafted for seamless welding and bending without compromising strength.
Bent Galvanized Pipe
Precision-bent galvanized pipes eliminate the need for joints in complex installations. Used in irrigation systems, architectural designs, and automotive exhausts, Yulong’s custom bending services maintain the pipe’s integrity while achieving angles up to 180 degrees. Our cold-forming technology prevents coating damage, ensuring rust resistance post-bending.
Custom Galvanized Pipe
No project is too unique for Yulong. Our custom galvanized pipes are tailored to your exact specifications—size, coating thickness, shape, or threading. Whether you need perforated pipes for filtration or tapered ends for specialized fittings, Yulong’s engineers leverage cutting-edge technology to deliver precision and scalability.
Why Choose Yulong?
With over two decades of expertise, Yulong combines innovation with rigorous quality control. Our galvanized pipes undergo 100% inspection for coating adherence and dimensional accuracy. From bulk industrial orders to niche custom requests, we prioritize fast turnaround times and competitive pricing.
Boost your project’s reliability—partner with Yulong today! [Explore our galvanized steel pipe specification catalog or request a quote now.]
Galvanized Pipe Size Specifications
| Diameter (Inch) | Length (Feet) | Thickness (Schedule) | លក្ខណៈពិសេស | Common Applications |
| 1/2" | 10, 20, 21 | SCH 40, SCH 80 | Threaded ends, corrosion-resistant | Plumbing, handrails, DIY projects |
| 3/4" | 10, 20, 21, 48 | SCH 40 | Hot-dip galvanized, smooth interior | Water supply, HVAC systems |
| 1" | 10, 20, 21, 36 | SCH 40, SCH 80 | High-pressure rated, zinc-coated | Industrial scaffolding, gas lines |
| 1 1/4" | 5, 10, 20, 21 | SCH 40 | Reinforced seams, rust-proof | Agricultural irrigation, construction |
| 1 1/2" | 10, 20, 21, 48 | SCH 40, SCH 80 | Pre-threaded, ASTM-certified | Fencing, structural supports |
| 2" | 8, 10, 12, 20 | SCH 40 | Heavy-duty, seamless finish | Underground plumbing, machinery |
| 2 1/2" | 10, 20 | SCH 80 | Hot-dip coated, impact-resistant | Marine environments, oil pipelines |
| 3" | 10, 12, 20 | SCH 40, SCH 80 | Threaded/unthreaded options | Drainage, industrial exhaust systems |
| 4" | 10, 20 | SCH 40 | High-tensile strength | Commercial construction, sewage |
| 6" | 10, 20 | SCH 80 | Extra-thick zinc layer | Large-scale infrastructure projects |
| Custom Sizes | 5–72 (on request) | Tailored | Precision-cut, bespoke coatings | Architectural designs, specialty uses |
Additional Specifications
Threaded Pipes: Available for 1/2" to 4" diameters (SCH 40/SCH 80).
Hot-Dip Galvanized: ASTM A123/A153 compliant for maximum rust protection.
Length Variations: Standard lengths: 10 ft, 12 ft, 20 ft, 21 ft. Custom cuts available.
Certifications: ISO 9001, ASTM, ANSI.
Why Yulong’s Galvanized Pipes?
Durability: Zinc-coated for 50+ years of corrosion resistance.
Versatility: From 1/2" residential pipes to 6" industrial-grade solutions.
Fast Delivery: Bulk orders are shipped within 3–5 business days.
Explore our full catalog or [contact Yulong] for custom quotes!
What Is Galvanized Steel Pipe Used For?
Galvanized steel pipe is one of the most versatile and cost‑effective materials in construction, plumbing, agriculture, and industrial applications. Its hallmark is a protective zinc coating applied through hot‑dip galvanizing, which guards the underlying steel against rust, corrosion, and physical wear. This combination of strength, longevity, and affordability makes galvanized pipe an ideal choice whenever you need reliable fluid transport, structural support, or outdoor durability.
In residential and commercial plumbing, galvanized pipe has long been used for cold‑water supply lines and sprinkler systems. The zinc layer resists scale buildup and oxidation, ensuring clear flow and minimal maintenance over decades of service. Many homeowners still rely on ½″, ¾″, and 1″ galvanized lines for garden hoses, outdoor taps, and fire‑sprinkler risers, appreciating its ease of cutting, threading, and joining with standard fittings.
Beyond plumbing, galvanized steel pipe plays a critical role in structural and safety applications. Scaffolding, guardrails, handrails, and fencing all benefit from the pipe’s high tensile strength and weather‑proof finish. In construction sites and event staging, scaffold tubes made of 1½″, 2″, and 2½″ galvanized pipe provide secure, reusable frameworks that resist bending and surface damage—even in harsh outdoor environments.
Agricultural and irrigation systems also lean on galvanized pipe for reliable water delivery. From drip‑irrigation headers to overhead sprinkler mains, lengths of 10 ft or 20 ft galvanized pipe withstand constant moisture, UV exposure, and soil acidity. Farmers often choose 2″ or 3″ pipe sizes to balance flow capacity with ease of handling, while threaded galvanized pipe simplifies installation of valves, tees, and end caps.
Industrial settings—from chemical plants to oil rigs—use larger‑diameter galvanized pipe (4″ to 12″ and beyond) for process water, compressed air, and low‑pressure fluid transport. Even in marine environments, where salt spray accelerates corrosion, galvanized pipe retains its integrity far longer than bare steel, making it a cost‑saving alternative to stainless steel in non‑critical applications.
Whether you need durable water lines, strong structural supports, or corrosion‑resistant tubing for outdoor projects, galvanized steel pipe delivers proven performance and excellent value. Explore our full range of nominal sizes—from ¼″ up to 24″—and standard lengths in 10 ft, 12 ft, and 20 ft. Contact us today for custom cuts, bulk pricing, and expert guidance on selecting the right galvanized pipe for your next project.
Why Choose Yulong as Your Trusted Galvanized Pipe Supplier?
At Yulong, we understand that selecting the right galvanized pipe supplier impacts your project’s success, budget, and timelines. With over 20 years of expertise in manufacturing and distribution, we’ve become a global leader in delivering high-quality galvanized pipes for sale that combine affordability, durability, and versatility. Here’s why industries worldwide rely on us:
1. Competitive Galvanized Pipe Prices Without Compromising Quality
We optimize production efficiency to offer unbeatable galvanized pipe prices, whether you’re ordering single units or bulk galvanized pipe shipments. Our economies of scale, paired with in-house galvanizing facilities, allow us to cut costs while maintaining ASTM/ISO-certified quality. From 1/2" threaded pipes to 6" industrial-grade tubing, we ensure every product meets rigorous corrosion-resistance standards.
2. Extensive Inventory for Immediate Needs
Yulong stocks a vast type of galvanized pipes for sale, ready for same-day dispatch. Whether you need standard sizes like 2-inch galvanized pipe 20 ft or specialized dimensions like 1 5/8 galvanized pipe, our inventory covers:
Hot-dip galvanized pipes (SCH 40/SCH 80).
Threaded and non-threaded options.
Custom lengths (10 ft, 20 ft, 21 ft, and bespoke cuts).
No more delays—get the exact pipes you need when you need them.
3. Bulk Order Expertise & Scalability
For large-scale projects, our bulk galvanized pipe solutions ensure consistency and cost savings. We serve construction firms, agricultural suppliers, and industrial contractors with:
Volume discounts on orders over 10 tons.
Custom packaging to reduce onsite handling.
Flexible MOQs to suit startups and enterprises alike.
Our logistics network guarantees timely delivery, even for urgent international orders.
4. Unmatched Durability for Long-Term Value
Yulong’s pipes are engineered to last. The hot-dip galvanized coating provides 50+ years of rust protection, outperforming cheaper alternatives. We rigorously test coating thickness (85–100 microns) and tensile strength (≥330 MPa) to ensure reliability in extreme conditions—underground, coastal, or high-pressure environments.
5. Customer-Centric Service
We simplify procurement with:
Transparent pricing: No hidden fees; quotes include shipping and taxes.
Technical support: Get guidance on pipe selection, coating specs, and installation.
Custom solutions: Modify diameters, lengths, or threading to match your design.
