Corrosion-resistant And Cost-effective Piping Solutions
Erw galvanized steel pipes offer corrosion resistance and durability for water supply, construction, and industrial applications.
Corrosion-resistant And Cost-effective Piping Solutions
Erw galvanized steel pipes offer corrosion resistance and durability for water supply, construction, and industrial applications.
ERW Galvanized Steel Pipes are electric resistance welded (ERW) carbon steel pipes coated with a zinc layer through hot-dip galvanizing, providing excellent corrosion resistance and durability. Compliant with ASTM A53 and A123 standards, these pipes are ideal for water supply systems, construction frameworks, and agricultural irrigation, offering a minimum tensile strength of 330 MPa and a zinc coating thickness of at least 1.2 oz/ft² (366 g/m²).
The manufacturing process involves forming steel strips into pipes via ERW, followed by hot-dip galvanizing at approximately 450°C (842°F), creating a protective zinc layer that bonds metallurgically with the steel. Available in sizes from DN15 (1/2”) to DN200 (8”) with wall thicknesses from SCH 40 to SCH 80, and lengths from 5.8 to 12 meters, ERW Galvanized Steel Pipes meet diverse project requirements. Surface treatments like passivation enhance longevity, and plain or threaded ends ensure easy installation.
These pipes undergo rigorous testing, including tensile, hydrostatic, and coating thickness tests, to ensure compliance with ASTM standards. The zinc coating acts as a sacrificial anode, protecting the steel even if scratched, making Corrosion-Resistant ERW Pipes suitable for humid and industrial environments. Their welded construction ensures strength for high-pressure applications in gas pipelines and industrial piping.
Compared to seamless galvanized or stainless steel pipes, ERW Galvanized Steel Pipes offer cost-effectiveness with comparable corrosion resistance, though they may require maintenance in highly corrosive environments. Their versatility and lifespan (up to 40 years) make them a preferred choice for fencing, railings, and structural applications.
ERW Galvanized Steel Pipes address challenges like pipeline corrosion, environmental exposure, and cost constraints, delivering reliable, long-lasting solutions for industrial and residential applications.
Explore ERW Galvanized Steel Pipes with targeted long-tail keywords for specifications, applications, and materials.
Note: ERW Galvanized Steel Pipes meet international standards, ensuring high performance and reliability. Contact suppliers for detailed specifications.
The properties of galvanized steel are a unique combination that make it ideal for use in interior and exterior applications such as car bodies, appliances, nuts and bolts, roofs, and rebar.
| Grade | C (% max) | Mn (% max) | P (% max) | S (% max) | Cu (% max) |
|---|---|---|---|---|---|
| Grade A | 0.25 | 0.95 | 0.05 | 0.045 | 0.40 |
| Grade B | 0.30 | 1.20 | 0.05 | 0.045 | 0.40 |
The zinc coating (80-100 microns) enhances the corrosion resistance of ERW Galvanized Steel Pipe , protecting the carbon steel base in harsh environments. The chemical composition ensures weldability and durability for
| Grade | Tensile Strength (min, MPa) | Yield Strength (min, MPa) | Elongation (min, %) |
|---|---|---|---|
| Grade A | 330 | 205 | 28 |
| Grade B | 415 | 240 | 30 |
These properties ensure ERW Galvanized Steel Pipe eliver robust performance in structural and high-pressure applications.
| Feature | Hot-Dip Galvanized Pipe | Pre-Galvanized Pipe | Stainless Steel Pipe |
|---|---|---|---|
| Coating | Zinc (80-100 microns) | Zinc (thinner, coil-coated) | None (inherent corrosion resistance) |
| Corrosion Resistance | Excellent (sacrificial anode) | Moderate (weaker at welds) | Superior (no coating needed) |
| Cost | Cost-effective | Lower initial cost | Higher cost |
| Lifespan | Up to 50 years | 20-30 years | 50+ years |
| Applications | Water, gas, construction | Light structural, fencing | Chemical, marine, hygienic |
Hot-Dip Galvanized Pipes offer distinct advantages over pre-galvanized and stainless steel pipes.
| Grade | C (% max) | Mn (% max) | Si (% max) | P (% max) | S (% max) | Cr (%) | Ni (%) | Mo (%) | N (% max) |
|---|---|---|---|---|---|---|---|---|---|
| 304 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-11.0 | - | 0.10 |
| 304L | 0.03 | 2.00 | 1.00 | 0.045 | 0.030 | 18.0-20.0 | 8.0-12.0 | - | 0.10 |
| 316 | 0.08 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.10 |
| 316L | 0.03 | 2.00 | 1.00 | 0.045 | 0.030 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 | 0.10 |
The low carbon content in 304L and 316L enhances weldability, while molybdenum in 316 and 316L improves resistance to pitting and crevice corrosion, making ERW Galvanized Steel Pipe ideal for harsh environments.
| Grade | Tensile Strength (min, MPa) | Yield Strength (min, MPa) | Elongation (min, %) | Hardness (max, HB) | Hardness (max, HRB) |
|---|---|---|---|---|---|
| 304 | 515 | 205 | 40 | 201 | 92 |
| 304L | 485 | 170 | 40 | 201 | 92 |
| 316 | 515 | 205 | 40 | 217 | 95 |
| 316L | 485 | 170 | 40 | 217 | 95 |
These mechanical properties make ERW Galvanized Steel Pipe suitable for applications requiring high strength and corrosion resistance, such as architectural structures, marine environments, and chemical processing.
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