LSAW Steel Pipe

Tianjin Ruide Steel Pipe Manufacturing Co., Ltd.

LSAW Steel Pipe

LSAW (Longitudinal Submerged Arc Welded) pipes are high-strength, large-diameter steel pipes widely used in critical infrastructure projects. They are manufactured through three primary forming methods:

UOE Process: Cold-formed using U-ing, O-ing, and Expansion for superior dimensional accuracy.

RBE Process: Roll-Bending and Expansion for cost-effective production.

JCOE Process: J-shape, C-shape, O-ing, and Expansion for customized wall thickness and diameters.

These pipes are ideal for high-pressure transmission and structural applications due to their excellent weld integrity and mechanical properties.

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Specifications

Diameter (OD):406mm – 1,422mm (16" – 56")

Wall Thickness:6mm – 40mm
Length:3m–50m (customizable)
Standards: API 5L (PSL1/PSL2), ASTM A671, ASTM A672, EN 10217, ISO 3183
Grades:X42, X52, X60, X65, X70, X80 (API 5L); A/B, Gr.60/70 (ASTM)
Material: Carbon Steel, Low-Alloy Steel (with optional corrosion-resistant coatings)

Performance & Advantages

High Strength: Suitable for high-pressure oil, gas, and water transmission.
Excellent Toughness: Low-temperature impact resistance (tested per ASTM A370).
Precision Welding: Submerged arc welding (SAW) ensures uniform, defect-free seams.
Dimensional Consistency: UOE/JCOE processes guarantee roundness and straightness.
Corrosion Resistance: Optional internal/external coatings (FBE, 3LPE, 3LPP).

Applications

Oil & Gas Pipelines: Onshore/offshore transmission (e.g., API 5L X65/X70).
Water Transport: Large-diameter water mains and penstocks.
Structural Use: Piling, bridge construction, and offshore platforms.
Energy Sector: Nuclear, thermal power plants, and slurry pipelines.

Certifications & Testing

Non-Destructive Testing (NDT): Ultrasonic (UT), Radiographic (RT), Hydrostatic.
Chemical & Mechanical Tests: Charpy V-notch, hardness, tensile strength.
Compliance: ISO 9001, API Monogram, CE/PED (for EU markets).

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