Seamless & ERW Pipes
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Seamless, ERW, LSAW, SSAW Pipes
Seamless, ERW, LSAW, and SSAW are different types of steel pipes distinguished by their manufacturing processes: SEAMLESS pipes are made from a solid steel billet, while ERW, LSAW, and SSAW pipes are welded from steel plates or coils. ERW (Electric Resistance Welding) pipes are formed from a flat plate and welded with a high-frequency electrical current. LSAW (Longitudinal Submerged Arc Welding) pipes are made from large, thick plates, bent into shape, and welded with a submerged arc process in a straight line. SSAW (Spiral Submerged Arc Welding) pipes are manufactured from a steel coil, rolled into a spiral shape, and welded to form a helical seam. Each type has distinct strengths and is used for different applications, with seamless pipes offering higher strength for high-pressure environments, ERW pipes providing a cost-effective option for lower-pressure needs, and LSAW and SSAW pipes suited for large-diameter and long-distance transportation applications.
Why Choose Us
SEAMLESS (SMLS)
- Manufacturing: A steel billet is heated and pierced, then rolled into a hollow tube, creating a pipe with no weld seam.
- Characteristics: Higher strength, better pressure resistance, and less prone to corrosion or failure at the seams because there are no welds.
- Applications: Ideal for high-pressure systems and applications in the oil and gas industry.
ERW (Electric Resistance Welding)
- Manufacturing: A flat steel plate or strip is formed into a pipe, and the seam is welded using high-frequency electrical current.
- Characteristics: Cost-effective and offers good performance for various applications.
- Applications: A popular alternative to seamless pipes for applications that don’t require extremely high pressures.
LSAW (Longitudinal Submerged Arc Welding)
- Manufacturing: A large, thick steel plate is formed into a cylindrical shape and then welded along its length (longitudinally) with the submerged arc welding process.
- Characteristics: Known for its strength and ability to handle heavy-duty applications.
- Applications: Commonly used for large-diameter pipelines in the oil and gas industry and for heavy structural applications.
SSAW (Spiral Submerged Arc Welding)
- Manufacturing: Steel coils are formed into a spiral shape, and the seam is welded with the submerged arc process, creating a helical weld line.
- Characteristics: Offers good deformation resistance, a smooth surface, and is easier to install.
- Applications: Often used for long-distance fluid and gas transportation, making it suitable for large-diameter projects.
| STANDARD | GRADE | Sizes |
| ASTM A53 | A | ½” ~ 48” |
| B | ||
| ASTM A106 | A | |
| B | ||
| ASTM A179 | A179 | |
| ASTM A192 | A192 | |
| API 5L PSL1 | X42 ~ X80 | |
| API 5L PSL2 | X42 ~ X80 |
- Piling Pipes, ERW Pipes & Tubes, LSAW, SSAW
- Stainless Steel Welded & Seamless Pipes in 304, 316, 316L, SAE 316
- Aluminium Pipes in Marine grades
