Introduction of galvanized ERW pipe

Galvanized ERW (Electric Resistance Welded) pipe is a type of steel pipe that combines the high-efficiency forming and welding process of ERW technology with the corrosion resistance provided by galvanization. Manufactured from hot-rolled or cold-rolled steel strips, the material is first formed into a tube and then welded using high-frequency resistance welding. After welding, the pipe is galvanized—either by hot-dip or electroplating—to enhance its durability and corrosion resistance. This product plays a vital role in various industries due to its structural strength, low cost, and extended service life.

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

Common Specifications of Galvanized ERW Pipe

Outer Diameter Range: DN15 (1/2") to DN600 (24")

Wall Thickness: 0.8 mm to 10 mm

Materials: Low carbon steels such as Q195, Q235, Q345, SPCC, ST37

Zinc Coating Thickness (Hot-Dip Galvanizing):

Standard grade: ≥45 μm

Heavy-duty grade: ≥80 μm

Key Features of Galvanized ERW Pipe

High-Quality Welds:

ERW technology ensures minimal heat-affected zones and uniform welds. Post-weld annealing reduces residual stress and improves overall mechanical properties.

Cost Efficiency:

Utilizing hot-rolled coils and continuous production lines, galvanized ERW pipe is especially economical for thin-walled, small-diameter, and low- to medium-pressure applications.

Smooth Internal Surface:

Weld beads are typically removed after welding, leaving a clean inner wall with low fluid resistance—ideal for fluid or gas transportation.

Excellent Corrosion Resistance:

The zinc layer significantly enhances resistance to moisture, air, and chemical corrosion, extending the service life of the pipe.

Application Fields of Galvanized ERW Pipe

Thanks to its robust corrosion resistance and low production cost, galvanized ERW pipe is widely used across both industrial and civil sectors:

Construction:

Scaffolding, structural frames, door and window profiles, guardrails, roof drainage systems

Municipal Infrastructure:

Water supply lines, fire protection systems, low-pressure gas pipelines

Agriculture:

Greenhouse structures, irrigation pipelines

Power & Telecommunications:

Electrical conduit (e.g., KBG/JDG pipes), cable protection

Automotive Industry:

Certain chassis components, exhaust systems

Furniture Manufacturing:

Shelving, brackets, frames for tables and chairs