04 // Industrial Pipes

LSAW / DSAW Pipes

VEFLOX supplies elite Longitudinal Submerged Arc Welded (LSAW) and Double Submerged Arc Welded (DSAW) pipes engineered for critical, large-scale infrastructure. Formed utilizing advanced UOE or JCOE pressing techniques and welded simultaneously from both the inside and outside, these heavy-wall pipes offer unmatched weld penetration and structural reliability for deep-water offshore platforms and high-pressure cross-country transmission lines.

Offshore & Sour Service Ready

Detailed Technical Specifications

Manufacturing Process

Produced from heavy steel plates using UOE, JCOE, or CE forming methods. Welded using Submerged Arc Welding (SAW). DSAW indicates the weld is performed on both the internal and external surfaces for maximum penetration and defect prevention.

Dimensional Standards

Line Pipe: API 5L (PSL 1, PSL 2, Sour Service)
Piping: ASME / ANSI B36.10M
Structural: EN 10219, ASTM A252

Material Grades

API 5L: Gr. B, X42, X46, X52, X60, X65, X70, X80 (Available in N, Q, M conditions for Offshore/Sour Service)
Carbon Steel: ASTM A53 Gr. B, ASTM A671, ASTM A672

Size Range (Nominal Bore)

Outer Diameter (OD): 16" NB up to 60" NB (406mm to 1524mm)

Wall Thickness

From 8.0mm up to 65.0mm. Designed specifically for heavy-duty applications requiring extreme external and internal pressure resistance.

Testing & Inspection

100% Ultrasonic Testing (UT) on plate edges and weld seams, 100% X-Ray (RT) on pipe ends, strict Hydrostatic testing, and Charpy V-Notch impact testing for sub-zero environments.

End Finishes & Coatings

Beveled End (BE) for field welding. Advanced anti-corrosion coatings including 3LPE, 3LPP, FBE, and Concrete Weight Coating (CWC) for subsea pipelines.

Core Advantages

Double Weld Integrity

By utilizing the DSAW process (welding from both inside and out), the weld seam achieves 100% penetration. This completely eliminates internal micro-crevices where corrosive media could pool and initiate cracking.

JCOE / UOE Precision

The mechanical expansion process at the end of the manufacturing cycle guarantees absolute roundness, straightness, and strict outer diameter tolerances, enabling rapid and flawless pipe-to-pipe field welding.

Harsh Environment Resilience

Engineered with low carbon-equivalent plates and subjected to rigorous impact testing, LSAW pipes safely withstand extreme external crushing forces in deep-water subsea lines and structural pilings.

Industries Served

Oil & Gas (Upstream)

Marine & Offshore

Petrochemicals

Water Transmission

Civil Structural Piling

Power Generation