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LSAW (Longitudinal Submerged Arc Welded) steel pipe is a type of large-diameter welded steel pipe that is manufactured using the submerged arc welding process. LSAW steel pipes are commonly used for long-distance pipelines, such as oil and gas transmission lines, water pipelines, and infrastructure projects. The process of Lsaw steel pipe: Plate  feeding → Edge Milling and Beveling → Board Probe → Edge Crimping →molding→Slag→Track Pre-Welding  → Tab Welding  → Inside Welding  → Slag  → Outside Welding  → Tab Removal  → Ultrasonic Inspection  → X-ray Inspection  →  Mechanical Expansion  → Flame Flat  → Hydro-static Testing  → Ultrasonic Inspection for pipe end and welding seam  → Weld and Pipe End X-ray Inspection  → Tube end weld grinding  → End Facing and Beveling  → Weighing and measuring  → Spray paint Marking  → Final Inspection  → Storage  → Storage and Ship…

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