Pipe conveyor belts

Closed-trough belt conveyor systems for especially tight curves and high productivity

A pipe conveyor belt differs from a conventional, troughed belt in its design and splicing technology and performs special conveying tasks.

Mining and industrial applications often require relatively large inclines and tight curves to be overcome in tight spaces and at high mass flow rates. The particular features of modern pipe belt conveyors include: no transfer points, no material spillage along the conveyor route, and tight 3D curves. Pipe belt conveyors save space thanks to their compact design, navigate natural terrain, including steep conveyor angles up to 30°.

Design and properties of the pipe conveyor system

The pipe belt works in accordance with a specific operating principle: at the material feed point the conveyor belt is troughed and is fed at this point like a conventional conveyor belt. After the material feed point the conveyor belt is formed into a closed belt pipe by specially configured finger rollers. Further idlers set along the conveyor route guarantee that the belt is kept closed. As a result, the material conveyed remains protected by the closed belt system.

At the end of the belt run the closed belt is opened as a result of the configuration of the finger rollers and adopts a flat shape at the pulley. The material conveyed can then be discharged in the same way as with conventional belt systems.

Product range

Depending on requirements, the pipe belt is equipped with high-quality fabric or steel-cord strength members and a system of transverse reinforcement. This ensures a stable, durable tubular form. The high-tensile steel-cord pipe belts (kN > 5400 N/mm) offer new prospects, for example in surface and underground mining operations.

Pipe conveyor belts

Pipe conveyor belts

Pipe conveyor belts
After the material feed point the conveyor belt is formed into a closed belt pipe by specially configured finger rollers.

Pipe conveyor belts
Further idlers set along the conveyor route guarantee that the belt is kept closed.

Guide dimensions for design

  • Belt width B = 600 to 3200* mm
  • Outer diameter DA = 150 mm to 900* mm
  • Recommended max. fill level φF = 75%
  • Max. volumetric flow rate IV at conveyor speed vF = 1 m/s, max. outer diameter DA = 900* mm and fill level φF = 75% IVmax ≈ 1500* m3/h
  • Recommended max. conveyor speeds (depending on idler diameter) vF = 2,3 to 6,5* m/s
  • Max. lump size (depending on pipe inner diameter and operating data) 50 to 350* mm
  • Minimum radius of curve for horizontal and vertical curves
    R = Outer Ø x 300 for fabric belts
    R = Outer Ø x 600 for steel-cord belts
  • Minimum transition length
    x = Outer Ø x 30 for fabric belts
    x = Outer Ø x 60 for steel-cord belts

*Outer diameters greater than DA = 700 mm are handled using our new product CONTI® MegaPipe. We will be happy to provide further information on request.


Plant engineering
Technical plant design
Pipe belt properties
Protective functions of closed system
Tight curves and incline angles up to 30° possible, hence optimal adaptation to local features / terrain / systems High strength and ability to negotiate curves: long center distances without intermediate transfers Protection of the material conveyed against environmental conditions (e.g. rain, snow, sun and wind)
Low space requirement thanks to compact design, thus also ideal for underground mining, cement factories, steel mills and power plants The low-stretch strength member enables short take-ups Protection of the material conveyed against volatilzation and adulteration due to extraction or addition of parts of the material
No transfer stations as a result of tight horizontal and vertical curves and relatively high incline angles Stable tracking. The special tension member configuration ensures an effective seal in the overlap area Protection of the environment and people since hazardous, contaminated, dusty or strong-smelling materials (chemicals, refuse, ash, overburden etc.) cannot escape
Low maintenance and cleaning input thanks to standardized, abrasion-resistant components High volumetric flow rates and transport of large material lumps (up to 350mm) thanks to outer Ø up to 900 mm. Significantly reduced CO2 emissions compared with convention transport by truck.
High conveying speed Belt design offers a long service life and extreme reliability