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PRODUCT DESCRIPTION
Electric Resistance Welded (ERW) steel pipe is a highly engineered product formed through a precise manufacturing process where a steel strip is cold-formed into a cylindrical shape and joined using electric resistance welding. This method heats the edges of the steel strip to their melting point, fusing them together without the need for additional filler materials, resulting in a seamless-looking joint with consistent structural integrity. The pipes are available in various grades, diameters, and wall thicknesses, making them suitable for a wide range of industrial and commercial applications.
Manufactured from high-quality carbon steel, ERW pipes exhibit excellent mechanical properties, including high tensile strength, ductility, and resistance to impact. The production process ensures tight dimensional tolerances, allowing for easy installation and compatibility with standard fittings. Unlike seamless pipes, ERW pipes offer a cost-effective solution without compromising on performance, making them a popular choice across industries that require reliable fluid and gas transportation or structural support.
Superior Weld Quality: The electric resistance welding process creates a strong, uniform weld that undergoes rigorous testing to ensure freedom from defects, such as porosity or cracks. This results in pipes capable of withstanding high internal pressures and harsh environmental conditions.
Precision Dimensional Control: Advanced rolling and forming techniques maintain strict control over outer diameter, wall thickness, and straightness, ensuring consistent fitment in complex piping systems.
Corrosion Resistance: Optional surface coatings, such as galvanization or epoxy lining, can be applied to enhance resistance to rust and chemical corrosion, extending the service life in aggressive environments.
Versatile Grades: Available in grades ranging from low-carbon to high-strength steel, ERW pipes can be customized to meet specific project requirements, including ASTM, API, and ISO standards.
Cost-Effective Production: The automated manufacturing process reduces labor costs and material waste, making ERW pipes a economical choice for large-scale projects.
ERW steel pipes are widely used in:
Oil and Gas Industry: For transporting crude oil, natural gas, and petroleum products, as well as for well casing and tubing in onshore applications.
Water Supply and Drainage: Ideal for municipal water pipelines, sewage systems, and irrigation networks due to their leak-proof joints and corrosion resistance.
Construction: Used as structural supports in buildings, bridges, and scaffolding, thanks to their high load-bearing capacity and dimensional stability.
Automotive and Machinery: Employed in exhaust systems, hydraulic pipes, and mechanical components that require precise fit and reliable performance.
Energy Sector: For steam and condensate lines in power plants, as well as for renewable energy installations like wind turbine towers.
Q: Are ERW pipes suitable for high-pressure applications?
A: Yes, depending on the grade and wall thickness. Higher-strength grades and thicker walls can withstand pressures up to several thousand PSI, making them suitable for industrial fluid transmission.
Q: Can ERW pipes be welded on-site?
A: Yes, they can be welded using standard procedures, but it's important to follow proper welding guidelines to maintain the integrity of the joint, especially for pressure-containing applications.
Q: What is the difference between ERW and seamless pipes?
A: ERW pipes are formed from steel strips with a welded seam, while seamless pipes are made from a solid billet without a seam. ERW pipes offer better cost-efficiency, while seamless pipes are preferred for extreme high-pressure or high-temperature applications.
Q: How long do ERW pipes last?
A: With proper maintenance and coating, they can last 50+ years in non-corrosive environments. In harsh conditions, coated pipes may last 20-30 years, depending on the coating type and exposure.
PIPE ENDS:
Square ends: straight cut, saw cut, torch cut.
Beveled ends for welding.
SURFACE OPTIONS:
Lightly oiled
Hot-dip galvanized
Electro-galvanized
Black
Bare
Varnish coating/anti-rust oil
Protective coatings: Coal Tar Epoxy, Fusion Bond Epoxy, 3-layer PE
Plastic plugs at both ends
Hexagonal bundles (max. 2,000kg) with multiple steel strips
Two tags on each bundle
Waterproof paper wrapping, PVC sleeves, or sackcloth with steel strips
Plastic caps for additional protection
TESTING:
Chemical Analysis: Verification of material composition.
Mechanical Properties: Tensile strength, yield strength, elongation.
Technical Properties: Flattening, bending, hardness, and impact tests.
Dimensional Inspection: Exterior size accuracy.
Pressure and Non-Destructive Testing: Hydrostatic, ET, RT, and UT tests.
ERW line pipes for transporting oil, gas, and water.
ERW casing for oil and gas wells.
Structural tubes for construction and infrastructure.
High-pressure and high-temperature applications.
Outer Diameter: 21.3mm - 660mm
Wall Thickness: 1.0mm - 20mm
Length: 3m - 12m, or customized based on requirements
Ends: Plain, beveled, or threaded
STANDARDS:
ASTM 5L, ASTM A53, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672, EN 10217
STEEL GRADES:
API 5L: PSL1/PSL2 Gr.A, Gr.B, X42-X70
ASTM A53: GR.A, GR.B
ASTM A500
EN: S275, S275JR, S355JRH, S355J2H, EN10219-1, EN10217-1
GB: Q195, Q215, Q235, Q345, L175, L210, L245, L320, L360-L555
PRODUCT SPECIFICATIONS
Electric resistance welded (ERW) steel pipe offers exceptional versatility and durability, making it suitable for various industrial and structural applications. Manufactured with precision, ERW steel pipes are available in different grades such as A500 Grade B, A513, and A135, ensuring compatibility with diverse project requirements.
These pipes feature a semi-smooth, non-coated dark grey surface finish and a welded seam on the interior, providing a robust and consistent structure. Renowned for their high performance, ERW steel pipes are commonly utilized in applications such as railings, exhaust systems, roll cages, hinges, and other mechanical and structural uses.
The A500 Grade B standard specifies requirements for cold-formed welded and seamless carbon steel structural tubing, designed for strength and reliability in construction and infrastructure projects. The A513 standard ensures high-quality electric-resistance-welded carbon and alloy steel mechanical tubing, ideal for demanding mechanical applications. The A135 standard focuses on electric-resistance-welded steel pipes for high-efficiency applications.
With its combination of strength, durability, and adaptability, ERW steel pipe is an optimal choice for engineers, manufacturers, and construction professionals.
Exceptional Strength
Excellent Weldability
Effortless Machinability
Versatile Formability
ERW steel pipes are widely used for transporting gases and liquids, including oil and natural gas, meeting both low and high-pressure requirements. With advancements in ERW technology, these pipes have found increasing applications in oil and gas exploration, the automotive industry, and various other sectors.
Key advantages of ERW steel pipes include high production efficiency, cost-effectiveness, material conservation, and ease of automation, making them a reliable and sustainable choice for diverse industrial needs.
Zhongjing Steel Group (Guangdong) Co.,Ltd. specializes in the production of cold-rolled/hot-rolled coils, carbon steel pipes, bars, and PPGI materials. It is a modern enterprise integrating carbon steel production, processing, and trade. It is a Chinese iron and steel enterprise group.
