Design of DISTRICT HEATING / DISTRICT COOLING pipelines - bonded system according to EN 13941

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About this course

The course consists of 4 blocks. This one is block nr. 1

This online course is meant for engineers, designers and utility owners who are dealing with pre-insulated district heating and district cooling networks. After passing the course participants will get all needed basic knowledge regarding pipeline design and engineering.

Meet the lecturer!

Aleksandr Ledvanov
HeatConsult, Technical director

Aleksandr has more than 15-years experience in district heating design engineering. Under his leadership there were designed more than 500 km of pipelines at different part of the world - Scandinavia, Baltics, Germany and Latin America.
He is leading the one of the adaptations of the standard EN 13941 “District heating pipes”

I block course package

  • 8 academic hours
  • Slides
  • 5 multiple choice test
  • Certification
    For Estonians: Eesti Soojustehnikainseneride Seltsi, „Gaasiseadmed- ja paigaldised“ spetsialiseerumisel täienduskoolituse punkte: 12 TP


  • Basics of district heating design
  • Standard EN 13491 overview
  • Changes in direction
  • Branches in district heating systems
  • Reduction of diameter in district heating systems
  • Twin pipe systems and differences in design comparing with single pipe systems
  • Pipelines for higher temperature than 140°C (max temperature according to EN 13941)
  • District heating expansion pads
  • District heating leakage system
  • Specifics of district cooling engineering and difference with district heating
  • DH simple pipe sizing (Logstor calculator, hand calculations)

More detailed description of the course

General presentation:
Pipe systems, materials, media Pipe
Temperature / Different pipe's catalogues / Valid areas / EN – codes

Definition of pipe systems:
Temperature / pressure – lifetime
Project classes: A-B and C, safety
Number of full load cycles

Fundamentals of bonded pipe systems in soil:
Friction, expansion, natural fixpoint

Straight pipe sections:
Allowable axial stress level, 150 / 170 / 190 MPa or higher
Limit stability
Use of different calculators, hand calculations on practical examples

Trench backfill material – compaction, what to inspect on site
Pipes in protection pipe
Lifting several pipes
Max trench length exposed with heat on
Shallow installation
Max. soil cover

Change in direction:
Allowable axial stress level, limit stability
Compensated system
Preheated system (in open trench)
E-comp system
High axial stress level (without compensation)

Calculation of expansion zone
80° to 90°, other angles 10° to 80°
Calculators and hand calculations for L / Z and U bends

Casing Joint:
Material properties
Shrink joints
Welded joints

Monitoring systems:
Detect principles (resistance / impulse)

45° branch – max distance to next expansion
90° branch - movement
Max length of branch

Reductions in media pipe

TwinPipe design:
Design (what is different to single pipe)
Merging from single to TwinPipe
Handling of Twinpipe

Flexible pipes:
Different types
Cu / Steel / PEX / AluPex – design rules


Awesome course full of super useful information

The course was structured very well and I found the level of detail very good

Exceptionally good lecturer, no useless info or "pop-engineering" speech

Aleksandr was a very good presenter I enjoyed the course and found his explanation easy to follow

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