LSAW steel pipes (Longitudinal Submerged Arc Welded) are a vital component of pipeline systems, particularly suited for long-distance transportation of petroleum, natural gas, water, and other fluids. Manufactured using the submerged arc welding process along the longitudinal seam of steel plates, these pipes feature high joint strength, exceptional reliability, and outstanding resistance to both internal and external pressure.
- Outer Diameter: 355.6 mm – 2320 mm
- Wall Thickness: 5.0 mm – 60 mm
- Length: 5.8 m / 6 m / 11.8 m / 12 m / 18 m / 32 m
- Standard & Grade: ASTM A53: Gr.A, Gr.B; API 5L: Gr.A, Gr.B, X42, X46, X52, X56, X60, X65 PSL1 and PSL2; ASTM A572 Gr.50; ASTM A252; API 5CT, ASTM 53, EN10217, DIN 2458, IS 3589, GB/T3091, GB/T9711, etc.
Introduction
LSAW steel pipes offer superior durability and mechanical properties, making them suitable for onshore and offshore pipeline projects, as well as bridges, buildings, and heavy-duty structural frameworks. Widely utilized in energy, petrochemical, and water supply industries, these products provide flexible and cost-effective solutions to meet diverse industrial demands.
DHX manufactures and supplies a comprehensive range of LSAW steel pipes, available in various specifications and compliant with stringent industry standards such as API 5L, ASTM A252, and EN 10219.
LSAW Steel Pipe Standards & Grades
LSAW pipes meet strict industry standards and are available in various grades, including:
- API 5L: Grade B, X42, X46, X56, X60, X65, X70 PSL1 & PSL2
- ASTM A53: Group A, Group B, Group C
- ASTM A572 Gr.50
- ASTM A252
- EN 10217
- DIN 2458
- GB/T3091
- GB/T9711
Specification
| Pipe Types | LSAW Steel Pipe, Longitudinal Submerged Arc Welded Steel Pipe, DSAW Steel Pipe, Welded Steel Pipe |
| Outer Diameter | 355.6mm to 2320mm |
| Wall Thickness | 5.0mm to 60mm |
| Length | 5.8m, 6m, 11.8m, 12m, 18m, 32m (custom lengths available) |
| Standards & Grades | ASTM A53A Group A, Group B; API 5L: Grade A, Grade B, X42, X46, X52, X56, X60, X65 PSL1 & PSL2; ASTM A572 Gr.50; ASTM A252; API 5CT; EN10217; DIN 2458; IS 3589; GB/T3091; GB/T9711 |
| Ends | Square End / Plain End (cut, saw cut, flame cut), Beveled / Threaded End |
| Steel Grades | API 5L: GR B, X42, X46, X56, X60, X65, X70; ASTM A53: GR A, GR B, GR C |
| Surface Treatment | Black Paint / Oil Painting / Rust Preventative Oil / Anti-corrosion Coating |
| Process | LSAW – UO (UOE), RB (RBE), JCO (JCOE, COE); DSAW – Double Submerged Arc Welding |
| Applications | Used for low-pressure liquid transport, such as water, gas, and petroleum |
Features of LSAW Steel Pipe
- High Strength & Durability: LSAW pipes are ideal for harsh environments, with excellent performance under high pressure.
- Wide Size Range: Available in outer diameters from 355.6mm to 2320mm, with wall thicknesses from 5mm to 60mm.
- Custom Lengths: Standard lengths include 5.8m, 6m, 11.8m, 12m, 18m, and 32m, with customization available.
- Superior Welding Quality: Produced using UO, RB, JCO, and DSAW processes for strong, reliable welds.
- Corrosion Resistance: Coated with black paint, oil-based coatings, or anti-corrosion layers for long-lasting protection.
Applications of LSAW Steel Pipe
LSAW steel pipes are widely used in industries that require durable and reliable piping solutions, including:
- Oil & Gas Pipelines: Transporting crude oil, natural gas, and refined products.
- Water Supply Systems: Used in municipal and industrial water transportation.
- Energy & Power Plants: For cooling water systems and other essential infrastructure.
- Construction & Structural Applications: Ideal for bridges, buildings, and heavy-duty frameworks.
LSAW Steel Pipe Manufacturing Process
- UO Process: UOE pipes are produced by bending steel plates to form a cylindrical shape, followed by submerged arc welding.
- JCO Process: JCOE (JCO) pipes involve a series of mechanical steps to form a cylindrical shape and weld it longitudinally.
- DSAW Process: Double Submerged Arc Welding (DSAW) ensures a double-layered weld, providing extra strength and resistance.
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We offer butt-welded pipe fittings, steel pipes, and flanges in various materials and specifications to meet diverse pipeline engineering requirements. Our experienced technical team provides effective solutions tailored to your specific needs. Contact us today for a quote and consultation!