Used Secondhand The spiral welded pipe mill is to uncoil the steel coil into steel strip which is formed by forming machine to make spiral welded pipe. Φ426—Φ3200 spiral welded pipe mill apply front swing type mill. The spiral welded pipes are mainly used as delivery pipeline for petroleum, natural gas, water, coal gas, as well as structural pipe and piling pipe. Make Xi’an heavy machinery research institute Year 2006 Last run 2014 Reason of stop Factory decides to replace the mill with other machines In-line Yes EQUIPMENT SPECIFICATION PIPE SPECIFICATION Pipe diameter: Φ426-Φ3200 mm Pipe length 6000-12000 mm Pipe weight: max. ~23T Thread pitch: Max. 2100 mm
COIL SPECIFICATION Steel plate thickness6.0-25.0 mm (different with grades) Steel coil OD Φ1200-Φ1900 mm Steel coil ID Φ500-Φ700 mm Coil width800-1650mm Coil weight Max 35T Material B-X80
PRODUCTION FLOW Forming process Welding process Left hand spiral forming, center positioning, front swing, discontinuous production. The inner and outer spiral welding line employs DC-AC double wire submerged-arc automatic welding, strip steel end welding employs DC double wire submerged-arc automatic welding( the welding power supply is used with outer welding together)
MILL SPECIFICATION Delivery speed~0.5-2.7m/min Welding speed ~0.6-2.0m/min Forming mode 3-roll bending plate left handed scroll type Forming angle scope 45°--80°
MILL PRODUCTION PROCESS FLOW Lift coil →Prepare coil →uncoiling →peeler →hydraulic aligning →leveling→ hydraulic aligning→ head cutting →butt joint→ hydraulic aligning→ edge shear → hydraulic aligning→ edge milling → hydraulic aligning→ sweeping →delivery → hydraulic aligning → pre-bending→ pressing plate→ hydraulic aligning→ forming→ inner welding and outer welding→ stabilizing→ ultrasonic inspection in line →plasma cutting → Enter finishing section(pipe out)
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