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Installation of self-regulating heating cable on a water pipe
- Oct. 08,2018

There are two ways to install a heating cable - outside and inside the pipe. In the first case, it is fastened along the pipe (or wrapped around it), in the second case it is wound inwards. Both options have an active practical application.


Option # 1 – Outside the pipe

Linear installation of the cable along the water pipe is easy. The wire is fixed on one side with the help of high-temperature plastic clamps or fiberglass self-adhesive. Holders are fixed at an interval of 0.3 m. Metal fastenings cannot be used. Calculate the length of the cable is simple - it is equal to the length of the pipe, which must be heated.


Instructions for linear installation:

To fix the cable on the water pipe, we use either ordinary insulating tape or pieces of aluminum self-adhesive

Step 1 - Fixing the cable to the pipe

Step 2 - Gluing the aluminum tape

Step 3 - Installation of heat insulation "shirt"

Step 4 - Fixing the thermal insulation on the pipe

For pipes buried in the ground, the cable is placed not strictly below or above, but slightly offset, which can be called "position 8 (4) hours."


In addition to the linear installation, spiral mounting is used - the cable is wound along the entire length of the pipe with a uniform pitch. Plus - maximum contact with the pipe surface, minus - increased material consumption.


The pitch between the turns can be changed depending on the conditions. For example, for areas subject to severe freezing, it is reduced - so the entire surface of the pipe will be as warm as possible


The wound method is relevant for pipes of medium and large diameter - sewer, drainage, but it is also used for heating water pipes.


Option # 2 – inside the pipe


The internal installation method is not suitable for all pipes, but only for water pipes with a cross section of more than 40 mm. In pipelines of smaller diameter, the cable will partly block the flow of water. To equip with internal heating a long pipe is difficult, but for sections of several meters long it is one of the best ways.


It is easiest to stretch the cable in vertical sections - from top to bottom. The procedure is performed using a tee and a sealing sleeve, which prevents the cord from sliding off. In some cases, the internal setting is more rational than the external one - for example, for repair or replacement of elements.


It is not difficult to insert and connect a ready system, it is much more difficult to assemble it. How to properly prepare the wires for entering the inside of the pipe, you can learn from the following instructions.

To get to the core of a self-regulating cable, first remove the top layer of polymer insulation

Step 1 - Remove the insulation

Step 2 - Release of the braid

Step 3 - Remove the corner Step

Step 4 - Preparing the inner clutch Step

Step 5 - Casing of the coupler

Step 6 - Gluing the end of the coupling Step

Step 7 - Putting on the cap Step

Step 8 - Cleaning of the hermetic end


Thermal insulation of Self Regulating Heating Cables

Regardless of the type of cable, it is necessary to make insulation. The thermal insulation is mounted over the heating system and the water pipe. If the water pipe together with the heating cable is not placed in a sealed "cocoon", the heating will go in all directions, that is, mostly "into the air".


The thickness of the insulation layer is selected depending on external factors. Suppose, for installation in the ground, there is a sufficient 20-30 mm layer, whereas for above-ground execution a heater of at least 50 mm in thickness.


As a reliable and effective Cable Heaters are expanded polystyrene or foam polyethylene. They are resistant to moisture and create some protective cushioning for the pipe, but they also need protection. For this reason, the pipe-in-pipe design is often used when water pipes placed in the ground or in the air are placed inside the interior of another larger diameter pipe together with a heater.


Huanrui Pipe Heating Cable are widely used both outside and inside of pipelines. More details about electric warm floor, please refer: http://www.chinaheatingcable.com/heat-trace-cable_c5


Related reading:Resistance Industrial Pipe Heating Cable, Pipe Temperature Maintain Heating cable


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