Deaper, longer, thinner

Industrial pipes

Porextherm’s WDS® Flexible Pipe insulation enables the construction of smaller, lighter and more cost effective double wall “Pipe in Pipe” pipelines. The world-wide increasing demand for fossil energy and the continuing threat of supply due to geopolitical events have conspired to push the limits of technology for the production and exploration of such energy sources.

Oil wells and platforms move further and further out to sea to tap new wells in ever larger depths.

This development for sure represents a large challenge to engineers. Long deep sea pipelines must be large enough to deliver sufficient quantities and should be sufficiently stable in addition, in order to resist the high pressure. Further more, sufficient flexibility should be given at the same time, so that the pipeline does not break due to the forces working under water.

Beyond that, usually oil comes out of a deep-sea well with clearly higher temperatures than the surrounding water in depths of up to 2.100 meters.

If pipes are not properly insulated, the Source: Technipviscosity of the oil will be strongly increased. In connection with the length of the pipeline, this can reduce the flow rate substantially. Beyond that, in the long term Paraffin will settle at the inner walls of the pipes, which can lead to a complete collapse of the pipeline.

Therefore flow lines and risers must be heated or insulated, so that the temperature of the oil remains as constant as possible and an undisturbed enterprise can be achieved.
Due to the very high expenditure and the enormous costs of heated systems insulated pipes are very common today. Conventional insulating materials, for example mineral fibers, cellulose film, Perlites or Polyurethane-foams thereby lead either to very thick or very rigid pipelines.
It is very important to use a very flexible but also good insulating system, particularly with pipelines, manufactured as endless pipes on shore, since they are wound up and locally unwound again.

Due to the enormous good insulation characteristics and the high pressure resistance of WDS® Flexible Pipe, very thin double-walled "Pipe in Pipe" pipelines can be manufactured.

Pipe-in-pipe insulation

The reel capacity of the subsea pipelay vessels can be optimized with WDS® Flexible Pipe.
Shorter loading- and transfer times lower the costs of the laying substantially.

As you can compare in the attached chart below, the thermal conductivity of WDS® Flexible Pipe is clearly better than of comparable materials.

The advantages at a glance

  • very good insulation properties
  • due to thinner insulation, thinner outside pipe diameters are possible
  • good flexibility
  • high pressure resistance
  • high temperature resistance from – 200°C up to 1000°C
  • no aging of the insulation properties
  • taylor made parts – no waste / cut off
  • very low heat bridges due to overlapping assembly
  • simple and dust free handling
  • easy to recycle
  • no harmful contents


WDS® Flexible Pipe