Ellipse Circle Square Rectangle ERW Welded Steel Pipes with Galvanized Oiled and Black Surface Finish

1．Product Overview

ERW welded steel pipes are used for construction structures, industrial fabrication, transportation systems, agricultural equipment, fencing, machinery manufacturing, furniture frames, and general engineering applications.

The product range includes ellipse, circle, square, and rectangle pipes. Different pipe shapes support structural, decorative, and fabrication requirements. Galvanized surface is suitable for outdoor and humid environments, while oiled and black surfaces are suitable for storage protection, welding, painting, and further processing.

2．Technical Solution

The pipes are manufactured using electric resistance welding technology. Steel strip is formed into the required pipe profile and welded continuously to achieve stable weld seam quality and dimensional consistency.

Galvanized coating improves corrosion resistance for outdoor structural use. Oiled surface provides temporary rust prevention during transportation and storage. Black surface is suitable for welding, painting, bending, and industrial fabrication.

3．Specifications

4．Application

This product is suitable for construction frames, steel supports, fencing systems, machinery frames, welded structures, vehicle frames, transportation components, greenhouse structures, support systems, tubular furniture, decorative frames, infrastructure projects, and general engineering fabrication.

Circle pipes are commonly used for general pipe structures and fluid transportation applications.

Square and rectangle pipes are suitable for structural frameworks, supports, and load-bearing fabrication.

Ellipse pipes are suitable for decorative structures, visible frames, and special profile applications.

5．Processing

The welded steel pipes are suitable for cutting, bending, drilling, punching, welding, galvanizing, painting, bundling, and structural fabrication.

Custom pipe dimensions, customized lengths, surface finishes, and packing methods can be supplied according to project requirements.

6．Advantages

• Multiple pipe shapes are available, including circle, square, rectangle, and ellipse profiles.
• ERW welding technology supports stable weld seam consistency and dimensional control.
• Galvanized surface improves outdoor corrosion resistance.
• Oiled surface supports temporary rust prevention during storage and shipment.
• Black surface is suitable for welding, painting, and secondary fabrication.
• The size range covers both light-duty fabrication and structural applications.
• Standard export packing supports container and sea shipment.

7．How to Choose

• Choose galvanized welded pipe for outdoor structural use and humid environments.
• Choose black welded pipe for industrial fabrication, welding, and painting.
• Choose oiled welded pipe when temporary rust prevention is required during storage or transportation.
• Choose square or rectangle pipe for structural frameworks and support systems.
• Choose ellipse pipe for decorative or visible frame applications.
• Choose circle pipe for general engineering and fluid transportation applications.
• Confirm pipe shape, size, wall thickness, length, surface treatment, and applicable standard before production.

8．FAQ

Q1．What pipe shapes are available

Circle, square, rectangle, and ellipse pipes are available.

Q2．What surface finishes can be supplied

Galvanized, oiled, and black surface finishes are available.

Q3．Can customized lengths be produced

Yes. Customized lengths are available according to customer requirements.

Q4．Are these pipes suitable for outdoor applications

Yes. Galvanized pipes provide improved corrosion resistance for outdoor environments.

Q5．What industries commonly use these products

Construction, industrial fabrication, transportation, agriculture, infrastructure, furniture manufacturing, and general engineering industries commonly use these products.