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ERW Pipe vs SSAW Pipe vs LSAW Pipe: Complete Comparison Guide (2026)

Understanding the Differences Between ERW, SSAW, and LSAW Steel Pipes

Steel pipes play a vital role in construction, oil and gas, and infrastructure projects. ERW Pipe, SSAW Steel Pipe, and LSAW welded steel pipes are the three most widely used types.

Royal Steel Group(Steel Tube Supplier), a global supplier, offers steels that can be fully customized to specific project needs and provides comprehensive integrated solutions for all three types of welded steel pipes, assisting contractors in selecting the most suitable option.

What is ERW Pipe?

ERW Carbon Steel Pipe (Electric Resistance Welded Pipe) is made by rolling steel coils and welding the seam with high-frequency electrical resistance.

Key Features:
Smooth surface, good dimensional tolerance
It is economic for mass production
Applicable for small and medium diameters

Typical Applications:
Structural Pipe
Building scaffolds
Furniture and mechanical tubing
Fluid transport at low pressure

What is SSAW Pipe?

SSAW Steel Pipe (Spiral Sub merged Arc Welded Pipe) is a technique of welding formed spirally along the edges suitable steel coils in which coils are formed into pipes using high frequency induction current followed by HFIW or submerged arc welding (SAW).

Key Features:
Large diameter capability
Flexible length production
Lower raw material cost

Typical Applications:
Water pipelines
Pile and foundation work
Oil & gas transmission (low to medium pressure)

What is LSAW Pipe?

LSAW Steel Pipe (Longitudinal Submerged Arc Welded Pipe) is made-up by bending the steel plates into a round pipe shape and then welding the seam longitudinally.

Key Features:
High strength, high reliability
For thick wall applications
Best for high pressure work

Typical Applications:
Oil and gas pipelines
Romania off-shore projects
A strong structural steel pipe for heavy load building.

ASTM A671 CC65 CL 12 EFW Steel Pipes for Industrial & Structural Applications (1)
ASTM-A53-Grade-B-ERW-Plain-End-Pipe
carbon steel pipe piles (3)

ERW vs SSAW vs LSAW Pipe Comparison

Feature ERW Pipe SSAW Steel Tube LSAW Steel Tube
Manufacturing Electric resistance welding Spiral submerged arc welding Longitudinal submerged arc welding
Diameter Range Small–Medium Medium–Large Medium–Large
Wall Thickness Thin–Medium Medium Thick
Strength Medium Medium High
Cost Low Medium High
Best Use Structural Piling / water Oil & gas / high pressure

How to Choose the Right Steel Pipe?

The right pipe depends on your job: 

Opt for ERW Pipe → for economical usage in structural applications
Go for SSAW Pipe → suitable for large diameter piling works
Select LSAW Pipe → for high-pressure and essential infrastructure applications

Why Choose ROYAL STEEL GROUP?

As a trusted global steel supplier, we offer:

1. A full range of ERW welded pipe, SSAW welded pipe, and LSAW welded pipe
2l Products compliant with ASTM/EN/API certifications
3. Sufficient stock and fast delivery (some sizes can be shipped within 7 days)
4. Custom sizes and coatings available
5. Extensive export experience to Southeast Asia, the Middle East, and the Americas

FAQ

What is the difference between ERW and SSAW pipe?
ERW pipes are straight welded, whereas SSAW pipes are spiral welded, enabling larger diameters.

Is ERW or LSAW pipe stronger?
The LSAW pipe is strong and where the high pressure is a must have.

SSAW pipe for oil and gas?
Yes but mostly for low-medium pressure pipelines.

Which pipe is cheapest?
ERW tube tends to be the most economical.

ROYAL GROUP

Address

Kangsheng development industry zone,
Wuqing district, Tianjin city, China.

E-mail

sales01@royalsteelgroup.com

Phone

Sales Manager: +8613652091506

Hours

Monday-Sunday: 24-hour Service

Post time: Apr-13-2026