Product Overview
Efficient Forming, Reliable Welding and Broad Industrial Adaptability

Welded steel pipe is produced by forming steel plate or coil into a tubular shape and joining the edges through high-frequency resistance welding, submerged arc welding or spiral welding. With excellent dimensional control, stable weld quality and flexible size coverage, welded pipe is widely used in structural engineering, water transmission, oil and gas pipelines, mechanical fabrication and general industrial systems.

Stable Weld Integrity

Controlled welding parameters ensure consistent weld strength, appearance and service reliability.

Accurate Dimensions

Precise forming and sizing processes provide uniform outside diameter, wall thickness and straightness.

Cost-Effective Supply

High production efficiency makes welded pipe suitable for large-volume and project-based procurement.

Multiple Welding Processes

ERW, LSAW and SSAW options are available for different pressure levels, diameters and applications.

Flexible Surface Treatment

Black finish, galvanized coating, anti-corrosion coating and painted surfaces are available.

Complete Inspection

Hydrostatic testing, ultrasonic testing, weld seam inspection and dimensional checks can be supplied.

Specifications
Common Welded Pipe Type Reference
Pipe Type Process OD Range WT Range Main Standard Typical Application
ERW Pipe High-Frequency Resistance Welding 21.3 – 660 mm 1.0 – 20 mm ASTM A53 / API 5L Fluid transmission and structure
LSAW Pipe Longitudinal Submerged Arc Welding 406 – 1422 mm 6.0 – 50 mm API 5L / ASTM A252 Oil, gas and piling projects
SSAW Pipe Spiral Submerged Arc Welding 219 – 2540 mm 5.0 – 25 mm API 5L / EN 10219 Water, gas and infrastructure pipelines
Galvanized Welded Pipe Welded Pipe with Zinc Coating 21.3 – 508 mm 1.2 – 12 mm ASTM A53 / BS 1387 Water systems and construction
Structural Welded Pipe Round, Square or Rectangular Forming 20 – 600 mm 1.0 – 20 mm ASTM A500 / EN 10219 Building frames and machinery
Precision Welded Tube Cold Forming and Precision Sizing 10 – 219 mm 0.8 – 10 mm EN 10305 / ASTM A513 Automotive and mechanical parts
Applications
Widely Used in Construction, Energy and Industrial Systems
Oil and Gas Pipeline

Transmission lines, gathering pipelines, process piping and low-to-medium pressure systems.

Water Transmission

Municipal water supply, drainage systems, irrigation networks and treatment plants.

Structural Engineering

Building columns, steel frames, scaffolding systems, bridges and support structures.

Mechanical Fabrication

Equipment frames, machine components, rollers, guards and general fabrication parts.

Piling and Foundation

Large-diameter pipe piles, marine construction, port engineering and foundation support.

Construction Utilities

Fire protection systems, HVAC pipelines, cable protection and building service networks.

Available Product Types
ERW Pipe LSAW Pipe SSAW Pipe HFW Pipe Galvanized Pipe Black Pipe Structural Tube Precision Tube
Surface and End Options
Black Finish General industrial supply
Hot-Dip Galvanized Enhanced corrosion protection
Painted Surface Color-coded project use
3PE / FBE Coating Buried pipeline protection
Plain or Beveled End Cutting or welding ready
Standards and Compliance
ASTM A53 Welded and Seamless Steel Pipe
API 5L Line Pipe for Pipeline Transportation
ASTM A500 Structural Steel Tubing
ASTM A252 Welded and Seamless Steel Pipe Piles
EN 10219 Cold Formed Welded Structural Hollow Sections
BS 1387 Steel Tubes for Water, Gas and Air
Quality Assurance
Hydrostatic Test Weld Seam Inspection Ultrasonic Test Eddy Current Test Dimensional Check Visual Inspection Tensile Test MTC Certificate

Need welded pipe for a construction, pipeline or industrial project?
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