Conti Single Steel Pre-Insulated Pipes

Key Features

Carrier Pipe Dimension Temp Range Max Alarm System Operating Pressure Diffusion Barrier Series of Insulation Thickness
Axial DN20 to DN200 0°C to 150°C  Yes  25 bar  Yes  1,2 & 3
Spiral DN300 to DN1200 0°C to 150°C  Yes  25 bar  Yes  1,2 & 3

Description of Conti Single Steel Pipes

Vital Energi Conti steel pre-insulated pipes are suitable for district heating and district cooling applications.

There are two main manufacturing processes for Conti pipes:

  • Axial Conti
  • Spiral Conti

In the axial conti process pipes are made by casting the insulation onto the service pipe in a moving mold, after which the casing is extruded onto the insulation. The production takes place in a continuous process.

An effective diffusion barrier foil, preventing diffusion of insulating gases is embedded between the insulation and the casing.

Consequently, continuously produced pipes with diffusion barrier foil do not age.

The method is suited for pipes with outer casing dimensions 90 - 315mm.

The total heat loss is over a 30 year period is 10-25% lower than that of corresponding, traditional pipe. The smallest dimensions yield the greatest savings.

In the spiral conti process the insulation is sprayed onto the service pipe or it is cast in a mould around the outer casing, after which the casing is extruded onto the insulation in a spiral movement.

The method applies to casing dimensions 355 - 1200mm. They are available with diffusion barrier foil as special products.

Vital Energi Conti steel pre-insulated pipes are available in three insulation thicknesses Series 1, 2 and 3 and are manufactured in 6m and 12m and 16m lengths as standard. The pipes are supplied with two copper wires embedded in the polyurethane (PUR) insulation; these wires are used to identify any leaks in the system.

The polyurethane (PUR) insulation has a guaranteed lambda value of 0.023 W/mK.

Vital Energi Conti steel pre-insulated pipes are available in carrier pipe sizes from O/D 26.9mm to 1219mm.

Applications of Conti Single Steel Pipes

  • Low Temperature Hot Water (LTHW)
  • Medium Temperature Hot Water (MTHW)
  • Cooling

The general advantages of Conti Steel Pipe systems are:

  • Reduction in the number of joints needed through the availability of long lengths
  • Reduction in the number of bends/fittings needed as the piping can be factory curved to follow the best and easiest path
  • Reduced operating costs due to diffusion barrier being fitted
  • Fully welded system
  • Alarm System
  • No-dig methods (or boring) can be applied
  • Fully compliant with CIBSE CHPA Heat Networks Code of Practice