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

1．Product Overview

Welded steel pipes are widely used in construction, industrial fabrication, transportation systems, and structural engineering applications. The product is available in circle, square, rectangle, and ellipse profiles to support different installation and fabrication requirements.

The pipes are manufactured using ERW welding technology, providing stable dimensional consistency and efficient production performance. Galvanized, oiled, and black surface finishes are available according to corrosion protection and processing requirements.

2．Technical Solution

Steel strip is continuously roll formed into pipe shape and welded through ERW processing technology. After welding, the product can be supplied with galvanized coating, anti-rust oil coating, or black finish.

Galvanized surface treatment improves corrosion resistance for outdoor and humid environments. Oiled and black pipes are commonly used for fabrication, painting, and industrial applications requiring additional processing.

Different pipe profiles are suitable for load-bearing structures, machinery frames, decorative structures, fencing systems, and industrial fabrication.

3．Specifications

4．Size Range

5．Application

These welded steel pipes are widely used in structural construction, steel frameworks, industrial fabrication, fencing systems, machinery manufacturing, furniture production, transportation structures, and agricultural engineering applications.

Galvanized pipes are commonly selected for outdoor projects and humid environments, while black and oiled pipes are suitable for fabrication and further surface treatment.

6．Processing

The product supports cutting, welding, punching, bending, galvanizing, and fabrication processing.

Customized lengths and different surface finishes can be supplied according to project requirements.

Bundles can be packed for container shipment or bulk transportation.

7．Advantages

• ERW manufacturing provides stable dimensional accuracy and efficient production consistency.
• Multiple pipe profiles support structural, decorative, industrial, and mechanical applications.
• Galvanized coating improves corrosion resistance for outdoor environments.
• Black and oiled surfaces are suitable for fabrication and secondary processing.
• Different thickness ranges support both light-duty and heavy-duty structural requirements.
• The product supports welding, cutting, and further fabrication processing.

8．How to Choose

• Choose galvanized pipes for outdoor construction and humid environments.
• Choose black steel pipes for fabrication, painting, or industrial applications.
• Choose oiled pipes when temporary anti-rust protection is required during storage and transportation.
• Select square or rectangular pipes for load-bearing structures and framework applications.
• Choose round pipes for piping systems, fencing, and general engineering use.
• Confirm pipe size, wall thickness, length, and surface finish according to project requirements before production.

9．FAQ

Q1．What pipe shapes are available
Circle, square, rectangle, and ellipse pipes are available.

Q2．What surface finishes are available
Galvanized, oiled, and black surface finishes are available.

Q3．What standards are supported
The product can be supplied according to ASTM A53, BS1387, DIN2244, GB/T13793, GB/T3091, GB/T6725, and GB/T6728.

Q4．Can customized lengths be supplied
Yes. Standard lengths are 5.8M and 6M, and customized lengths can be produced according to project requirements.

Q5．What industries commonly use welded steel pipes
These pipes are commonly used in construction, machinery, industrial fabrication, agriculture, transportation, and structural engineering applications.