Carbon Steel Welded Pipe

Carbon Steel Welded Pipe is a widely used tubular product made by rolling carbon steel plates or strips into a cylindrical shape and welding the longitudinal or spiral seam.It is produced through various welding processes such as Electric Resistance Welding(ERW),Submerged Arc Welding(SAW),High-Frequency Welded(HFW),and Laser Welding,offering a cost-effective and reliable solution for fluid transportation,structural support,and general engineering applications.

Main Features

Cost-effective:Lower production cost compared with seamless steel pipes,suitable for large‑scale projects.

Stable performance:Uniform wall thickness,good roundness,and consistent mechanical properties.

Wide size range:Available in small to large diameters,with various wall thicknesses and lengths.

Easy processing:Can be cut,bent,flanged,threaded,and coated conveniently.

Good weldability:Made of carbon steel,compatible with most welding and connection methods.

Common Manufacturing Processes

ERW/HFW Pipe:High‑frequency electric resistance welded,mainly for medium and small diameters,used in water,gas,and structural pipes.

SAW Pipe(LSAW&SSAW):Submerged arc welded,for large‑diameter,thick‑wall pipes used in high‑pressure oil and gas pipelines.

LSW Pipe:Longitudinal welded pipes for general industrial and construction use.

Material&Standards

Common materials:ASTM A53,API 5L Grade B,Q235,Q355,ST37,ST52

Typical standards:

API 5L

ASTM A53/A252

EN 10217

GB/T 3091,GB/T 9711

Applications

Water supply and drainage pipelines

Oil,natural gas,and fuel transportation

Municipal engineering and pipeline networks

Structural pipe piles for bridges,ports,and buildings

Industrial process piping

Scaffolding,steel structures,and mechanical parts

Advantages Over Seamless Pipe

Lower price

Higher production efficiency

More stable dimensional accuracy

More suitable for mass production and large‑diameter specifications