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Two-Step Spiral Mills

Offline high-speed spiral mills with separated forming and welding stages

Overview

Two-step spiral forming equipment

Two-step spiral mills separate forming and welding into independent processes. High-speed forming creates the spiral shell, then transferred to dedicated offline welding stations. Forming runs continuously while multiple welding stations operate in parallel. Result: higher throughput, superior weld quality through controlled conditions, flexibility to optimize each stage independently.

Process Advantage: Independent forming and welding stages allow parallel processing, eliminating bottlenecks and enabling simultaneous multi-station welding operations for maximum capacity.
Two-step spiral welding process

Technical Specifications

Parameter Value
Pipe Diameter 20" - 120" (508 - 3048 mm)
Wall Thickness 5 - 25 mm
Material Grade X42 - X80
Forming Speed Up to 20 m/min
Parallel Welding Stations 2 - 4 stations

Key Benefits

Higher Capacity Than Single-Step

Parallel welding stations dramatically increase throughput vs. conventional mills

Superior Weld Quality

Dedicated welding stations with controlled conditions produce consistent, high-quality seams

Parallel Processing Advantage

Continuous forming while multiple welding stations operate eliminates production bottlenecks

Ideal for High-Volume Pipeline

Perfect for projects requiring sustained high-capacity production without downtime

Independent Stage Optimization

Optimize forming and welding parameters independently for each application requirement

Continuous Forming Operation

Uninterrupted forming production while welding runs offline, maximizing asset utilization

Applications

Large Pipeline Projects
High-Volume Production
Oil & Gas Transmission
Water Mains
Offshore

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