50-4200mm Induction Heating 3LPE Coating Pipe Production Line with Internal and External Coating for Steel Pipe Anti-Corrosion

• Automatic conveyor adjustment according to pipe size, fully controlled.
• PLC central control computer.
• Interactive human–machine interface screen.
• Customization available according to user-specific requirements.
• Unified adjustment of opening and closing, and unified angle adjustment.
• Each set of wheels is driven by independent power to expand the spiral angle of the conveyor; the transmission angle can reach 30 degrees.
• Transmission speed is adjustable from 0–6 m/min.
• Solid wide-surface tires with a single-wheel load capacity of 2.5 tons; press-fit tires resist degumming and cracking.
• Glue layer thickness greater than 85 mm, ensuring stable and reliable transmission and long-term operational safety.

Steel pipe heating equipment is used to heat pipes and can preheat, heat, and cure pipes according to different process requirements. It heats the pipe from 40 °C to 60 °C before blasting and removes water, moisture, and greasy dirt from the surface, meeting the demands of rust removal. The system includes intermediate burner heating and frequency heating (intermediate frequency heating) forms. Burner heating media can be gas or diesel. The intermediate frequency heating system is mainly used to heat pipes to 180 °C–230 °C to meet coating standards.

The internal blowing system cleans dust and sand inside the pipes using a draught fan, preventing contamination during coating. The system includes a pipe internal blowing carrier, dust collecting box, pulse back-blowing dust collector, live rotation roller, and pipe stopper. A set of filter-barrel type pulse back-blowing dust collectors is equipped on the dust collection box.

Used to clean dust and abrasive from the pipe surface after blasting and to improve the adhesion of FBE.

The system includes a stainless coating room, epoxy powder guns, powder coating controller, fluidization powder box, dual cyclone collecting structure, and pulse-blowback-cylinder dust catcher.

Used to extrude PE adhesive and PE protective coating, which are wound onto the external wall of the pipes. The polyethylene protective coating protects the epoxy powder coating. According to coating pattern, the system can be divided into cladding type and winding type; the winding type can be further divided into side type and upper type.

The water cooling system rapidly cools heated pipes to 40 °C–60 °C to protect the anti-corrosion layer and protective layer. It consists of a water cooling room, water cooling tower, self-priming pump, centrifugal pump, and pipeline. A back water pond is located near the cooling room.

This device removes the pipe-end coating layer and forms a groove with an angle below 30° for easy jointing. It is a double-head high-efficiency cutback machine composed of a steel brush, polishing motor, moving trolley, and high-efficiency dust collector. It is also equipped with a lifting rotation roller and rocker arm.