ERW Pipe


Overview of ERW Pipe

Discover the unparalleled benefits of ERW Pipe, a cutting-edge product in the world of steel pipes. Electric Resistance Welded (ERW) pipes are crafted from steel coils through a unique cold forming process, with the weld seam running parallel, ensuring a robust and reliable structure. The unique manufacturing process, which is both swift and efficient, makes ERW line pipe an ideal choice for large-scale production, especially for smaller diameter sections up to 660mm, meeting ASTM standards for quality.

As a client of UNIACERO, you stand to benefit from the high-quality and consistent performance of ERW pipes. These pipes, available in the desired length and diameter Sch, have carved a niche in the global transportation of oil, natural gas, and other vapor-liquid substances. Their ability to withstand both high and low pressures further accentuates their pivotal role in the transportation sector.

Additionally, UNIACERO offers ERW line pipes, available in various specifications, and provides options for hot dip galvanized or pre-galvanized finishes to enhance corrosion resistance. This ensures that your chosen ERW pipes not only meet industry standards but also exceed expectations in durability and longevity. Choose UNIACERO for ERW pipes that align with your project requirements, combining innovation, precision, and adherence to ASTM standards.

For more details, here is a comprehensive guide to ERW pipes.

ERW Pipe Specifications

Dive into the technicalities of our ERW pipes, meticulously designed to meet global standards. Crafted from carbon steel grades, with an outside diameter (O.D.) ranging from 21.3mm to 660mm and a wall thickness (W.T.) between 1.0mm to 20mm, our pipes are tailored to diverse requirements. The production procedures are governed by stringent quality checks, ensuring the use of optimal steel grades with specific mechanical properties.

Furthermore, we offer a variety of surface coatings, including options for hot dip galvanized and pre-galvanized finishes, enhancing corrosion resistance. The end types range from torch cut to straight cut, and joint methods include square ends, ensuring adaptability to various project specifications. Precision machining services are also available, utilizing cutting-edge technology to meet the highest industry standards.

When you choose UNIACERO, you’re not just purchasing a product; you’re investing in a promise of excellence and adaptability.

Production ProcessERW Pipe
Outside Diameter21.3mm – 610mm (1/2″ – 24″)
Wall Thickness2mm – 17.48mm (SCH 5S – SCH80/ XS)
Pipe Length3 – 18 meters
Production StandardsAPI 5LASTM A795EN 1029ASTM A500
API 5CTAS 1163JIS G3444BS 1387
ASTM A53EN 10217JIS G 3452
Corrosion PreventionLacquer, Varnish, Oiling, HDG, Pre-Galvanizing
End ProcessesSquare Cut, Bevelling, Threading, Grooving
Joint MethodFitting, Flange, Coupling, Clamp, Pipe Shoulder, Welding
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding
Product UsagePetroleum, Liquid & Gas Transmission, Structure, Piling Job, Mining, Agriculture, Fabrication, Fire Fighting, Heat Exchanging

Applications of ERW Pipes

Harness the versatility of ERW pipes in a myriad of applications. These pipes are not just limited to the transportation of oil and natural gas. Their robustness and reliability extend to various sectors, including infrastructure development, water supply systems, and industrial machinery, to name a few. As our esteemed client, you can seamlessly integrate our ERW pipes into your projects, ensuring efficiency, safety, and long-term durability. With UNIACERO by your side, you’re equipped with a product that caters to a broad spectrum of industrial needs.

Oil & Gas


Water Transmission

Piling Work

Solar Energy

Mechanical Engineering

Fire Fighting

Steel Fabrication

How is ERW Pipe Made?

Step into the world of advanced manufacturing with UNIACERO’s ERW pipes. The process begins with a long, coiled ribbon of steel, known as a skelp, which is then transformed into a flat rectangular sheet. This sheet undergoes a rolling process, culminating in a cylindrical shape. The ERW process employs high-frequency electrical currents, causing the edges to melt and fuse, resulting in a seamless bond. One of the standout features of our ERW pipes is the invisible weld seam, a testament to the precision and finesse of our manufacturing.

Crafted to desired lengths and diameters according to industry standards, our ERW steel pipe is available in common sizes and can be provided with hot-dip galvanized finishes. With the evolution of welding techniques, especially the transition to high-frequency currents, our pipes offer superior resistance to corrosion and seam failure. When you partner with UNIACERO, you’re embracing innovation and quality.


What is Difference between ERW and Seamless Pipe?

Navigating the world of steel pipes, two prominent contenders emerge: ERW and Seamless pipes. While both have been in use for decades, they have distinct manufacturing processes and applications. ERW pipes, as discussed, are welded, offering the advantage of an invisible weld seam. In contrast, seamless pipes are crafted from a solid steel billet, undergoing a series of rolling and stretching. Historically, seamless pipes were perceived as stronger due to the absence of a weld seam. However, with advancements in ERW manufacturing, this distinction has blurred. In practical applications, especially structural ones, both ERW steel pipes and seamless pipes offer comparable performance. However, it’s essential to choose based on specific requirements, as not all grades are available in both types. With UNIACERO, you’re empowered with the knowledge and the product range to make the best choice for your needs.

ERW Pipe

Seamless Pipe

our clients

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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