MANUFACTURING PROCESS
From Steel Strip to Inspected Pipe
Eight documented in-line stages take the strip through edge forming, spiral or longitudinal welding, seam annealing, flaw detection, expanding, cutting, blasting and final inspection.
MANUFACTURING PROCESS
From Steel Strip to Inspected Pipe
Eight documented in-line stages take the strip through edge forming, spiral or longitudinal welding, seam annealing, flaw detection, expanding, cutting, blasting and final inspection.
Edge forming
Strip edge forming before welding.
Spiral and longitudinal welding
Six-wire spiral and straight seam welding.
Weld seam annealing
On-line stress relief after forming.
Ultrasonic flaw detection
In-line weld seam inspection.
Mechanical expanding
Final diameter and straightness.
Digital cutting
On-line cutting to ordered length.
Shot blasting and coating
Blasting and powder spraying.
Hydrostatic testing
Pressure test before packing.
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