Flexible high pressure pipes can be equipped with a thermal insulation foam layer with conductive conductors for electric heating.
![](https://oiltechpipe.com/wp-content/uploads/2019/12/Рисунок3-1.png)
The technology of insulation of flexible pipes with thermal insulation foam layer with conductive cores for electric heating involves the following operations:
- application over the outer shell of the flexible pipe elements (segments) with conductors of the same layer, wound in the same direction with a certain step. Segments with conductive cores may include heating conductors, power conductors, signal conductors (twisted pairs, fiber);
- application of two anti-wear layers of polymer tape over segments with conductors;
- application of thermal insulation foam layer over polymer tape by continuous extrusion;
- application to the thermal insulation foam layer of the reinforcing element of two layers of high-strength metal tape wound in the same direction with a certain step and gap;
- production of the outer shell by continuous extrusion from compositions based on low-pressure polyethylene.
![](https://oiltechpipe.com/wp-content/uploads/2019/12/DSC_0370cop.jpg)
![](https://oiltechpipe.com/wp-content/uploads/2019/12/DSC_0376cop.jpg)
![](https://oiltechpipe.com/wp-content/uploads/2019/12/DSC_0013cop.jpg)
The heating control unit is used to control the electrical heating system of the pipeline. The heating control unit includes a control station and a transformer.
![](https://oiltechpipe.com/wp-content/uploads/2019/12/Рисунок4.jpg)
![](https://oiltechpipe.com/wp-content/uploads/2019/12/Рисунок5.jpg)
Cable assemblies are used to connect the conductors.
![](https://oiltechpipe.com/wp-content/uploads/2019/12/table-1.jpg)
To improve the reliability, tightness of the connection of 2 segments of the pipe with electric heating, an external protective (intermediate) coupling is used.