Double Pipe (pipe-in-pipe) Heat Exchanger

Double Pipe (pipe-in-pipe) Heat Exchanger E-WT80/125/4000

Functionally reliable heat exchanger for heating or cooling liquids and gases

operational area | usage

Digester gas recovery/gas cleaning in:

  • Wastewater treatment plants with sludge recovery / digestion towers
  • Biogas plants
  • Industrial plants

product description

The heat exchange consists of a double pipe (so-called “pipe-in-pipe”) through the outer pipe gap of which water is passed for heating or cooling. As digestion tower equipment the heat exchanger is used to heat heating sludge and to cool digester gas or sludge. Thanks to its design it has a low blockage risk and low pressure losses. One use case for the double-pipe heat exchanger is for thermal optimisation of the digestion process. The waste heat of the digested sludge and the digester gas is used to pre-heat the raw sludge.

constructional features

  • Matched welded stainless steel design of 2 media pipes
  • Dimensions up to DN 400, length 1000 mm to 6000 mm, any number can be connected in series
  • Execution as a pipe system or as a compact design


  • Compact and functionally reliable design
  • Low blockage risk
  • Low pressure losses
  • Individual adaptation to the existing situation, as a substitute solution or as an add-on, can be achieved easily


Datasheet Double Pipe (pipe-in-pipe) Heat Exchanger

contact person

Holger Wünsch
Product manager

With the usage of this website you agree to the usage cookies. Further information you will get in our general business terms and the data protection regulations