Round Square Rectangle Galvanized or Oiled ERW Welded Steel Pipe for Structural and Industrial Applications

1．Product Overview

ERW welded steel pipes are used for structural fabrication, construction frameworks, machinery manufacturing, fencing systems, greenhouse structures, transportation equipment, furniture tubing, and general engineering applications.

The product is available in round, square, rectangle, and ellipse profiles to meet different structural and installation requirements. Galvanized surface is suitable for outdoor and humid environments, oiled surface provides temporary rust protection during storage and transport, and black

surface is suitable for welding, painting, and further fabrication.

2．Technical Solution

The pipe is produced by forming steel strip into the required pipe shape and completing longitudinal welding through ERW processing.

The ERW process supports stable weld seam quality and consistent dimensional control. Different surface treatments can be selected according to the application environment. Galvanized finish improves corrosion resistance, oiled finish supports short-term anti-rust protection, and black finish supports secondary processing such as welding, coating, and fabrication.

3．Specifications

4．Application

This product is suitable for construction frames, steel supports, handrails, machinery frames, welded structures, vehicle structures, trailers, greenhouse systems, fences, decorative tubing, furniture structures, pipe supports, and general infrastructure projects.

Round pipes are commonly used for general engineering and fluid-related structural use. Square and rectangular pipes are suitable for frames, columns, supports, and load-bearing structures. Ellipse pipes are used where decorative appearance or special profile design is required.

5．Processing

The welded steel pipes support cutting, punching, welding, bending, galvanizing, painting, bundling, and secondary fabrication.

Customized pipe length, surface treatment, end condition, and packing method can be arranged according to project requirements.

6．Advantages

• Round, square, rectangle, and ellipse profiles are available for different structural designs.
• ERW welding supports stable weld seam consistency and continuous production.
• Galvanized, oiled, and black surface finishes support different corrosion protection and fabrication requirements.
• Standard 5.8M and 6M lengths support common container loading and project installation.
• Customized lengths and pipe profiles can be supplied according to order requirements.
• The product is suitable for construction, machinery, agriculture, transportation, furniture, and infrastructure applications.

7．How to Choose

• Choose galvanized welded steel pipe for outdoor use, humid environments, and corrosion protection requirements.
• Choose black welded steel pipe when the pipe will be welded, painted, or further fabricated.
• Choose oiled welded steel pipe when temporary anti-rust protection is needed during storage and shipment.
• Choose square or rectangle pipe for structural frames, supports, and load-bearing fabrication.
• Choose round pipe for general engineering and pipe structure applications.
• Choose ellipse pipe for decorative tubing or special structural design.
• Confirm pipe shape, size, thickness, length, surface treatment, and packing method before production.

8．FAQ

Q1．What pipe shapes are available

Round, square, rectangle, and ellipse welded steel pipes are available.

Q2．What surface finishes can be supplied

Galvanized, oiled, and black surface finishes are available.

Q3．What standards are supported

ASTM A53, BS1387, DIN2244, GB/T13793, GB/T3091, GB/T6728, and GB/T6725 are supported.

Q4．Can customized length be produced

Yes. Standard lengths are 5.8M and 6M, and customized lengths are available.

Q5．What industries commonly use these pipes

Construction, machinery, transportation, agriculture, furniture, and infrastructure industries commonly use these products.