Advantages and applications of ERW pipes in construction

ERW steel pipes are extensively utilized in the construction industry due to their high production efficiency, economic benefits, and reliable performance. They are especially favored in structural support, fluid transport, and temporary engineering. Here’s a breakdown of their key advantages and practical applications.

Continental Steel Co., Ltd is professional straight seam steel pipes manufacturer, for more details, please contact:sales@cscsteel-manufacturing.com

Key Advantages of ERW Pipes

1. High Production Efficiency

ERW pipes are manufactured through automated processes involving continuous roll forming and high-frequency welding.

Production speeds reach 20–50 meters per minute—3 to 5 times faster than spiral welded pipes.

The entire welding process is fully automated and does not require filler materials, significantly boosting output and reducing labor.

2. Excellent Dimensional Accuracy

ERW pipes offer tight dimensional tolerances:

Outer diameter tolerance is within ±0.5% (e.g., DN200 pipe tolerance ±1mm), and ovality ≤1%D.

Wall thickness uniformity is controlled within ±10%, making them ideal for precision applications such as structural truss connections.

3. Cost-Effective

The combination of high-speed production and efficient material use keeps overall costs low:

Material utilization exceeds 95%, reducing costs by 15%–20% compared to seamless steel pipes.

Well-suited for mass production and high-volume procurement.

4. Reliable Mechanical Properties

Thanks to advanced high-frequency welding technology:

The weld strength reaches 90%–95% of the base metal (in line with ASTM A53 standards).

Online heat treatment methods (e.g., induction annealing) can relieve welding stress, ensuring consistent mechanical performance.

5. Superior Surface Quality

ERW pipes have a smooth, clean, and aesthetically pleasing finish:

The weld seam is uniform and stable, reducing surface defects and improving long-term durability.

Main Application Scenarios of ERW Pipes in Construction

1. Structural Engineering

Frame Structures:

ERW square and round tubes (e.g., 100×100×4mm or Φ114×4mm) can serve as beams and columns, offering a lighter alternative to H-beams with a 20%–30% weight reduction.

Trusses and Space Frames:

Commonly used in large-span architecture like stadiums and airports. ERW round pipes (e.g., Φ168×6mm) allow for direct welding or flange connections at nodes.

2. Fluid Transport Systems

Water Supply and Drainage:

Galvanized ERW pipes are ideal for both indoor and outdoor plumbing, with corrosion resistance lasting over 25 years.

Fire Protection Systems:

Widely used in fire sprinklers and hydrants.

Sprinkler systems operate under <1.6MPa—ERW pipes offer optimal cost-performance.

Fire hydrant systems often use Sch40 series (e.g., DN100, wall thickness 5.7mm) and require passing a 2.5MPa pressure test.

3. Temporary Structures

Scaffolding and Support Frames:

ERW pipes are commonly used for formwork support and construction scaffolds due to their strength and low cost.

4. Decorative and Enclosure Structures

Railings and Fencing:

Used for temporary municipal fencing; costs are about 30% lower than seamless pipe options.

Curtain Wall Keels:

Galvanized or spray-coated ERW square tubes provide sturdy and attractive support for glass curtain walls.

Conclusion

ERW steel pipes have become the go-to choice in construction thanks to their efficiency, cost-effectiveness, and excellent dimensional stability. They are particularly well-suited for medium- to low-pressure systems and projects requiring rapid installation. When selecting ERW pipes, it's essential to assess the working environment and consult technical standards such as API 5L and EN 10219 to ensure suitability and compliance.