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August 12, 2017 18:06

Why do I need the heating cable inside the pipe ?

Why do I need the heating cable inside the pipe ?

heating cable for heating water pipe inside / outside - a special vehicle in which the resistance is adjusted depending on the ambient temperature.

In such a simple device used to heat the property of conductors when current passes through them.

If conventional wiring heats up and eventually could to flash, the heating cable is designed for permanent heating.

The lower the outside temperature, the more resistance and more heat inside.

heating cable - an indispensable element of the construction of drains, sewers and all those pipes, which it is desirable to stay warm in cold weather.

Let's see, in all its nuances: how it works, what it consists of, what are the views, move on to analyze the selection and installation.

Contents:

  • principle of operation and the device
  • Application, advantages and disadvantages
  • Species cables
  • Selection and erection
    • Forms and methods of attachment

Principle of operation and the device

Heated cordan electrical heater in the form of a tape which is composed of metal conductors separated teplovyvodyaschey matrix.

Matrix has a number of advantages:

  • Continuous heating;
  • matrix increases / decreases the amount of heat generated in dependence on the temperature outside the coil;
  • Matrix does not overheat;
  • Mounting Wire - arbitrary, the matrix does not depend on.

Driving tube cable

cable consists of 5 layers:

  1. Self-adjusting matrix - continuous heating of the polymer element.It is responsible for the heating;
  2. copper conductors - they serve to maintain a constant voltage;
  3. thermoplastic shell - isolates the matrix and leads from abrasion and moisture;
  4. metal braid - grounds, screened conductors and matrix;
  5. outer protective shell.

Application, advantages and disadvantages

If you look at the cable through the prism of different applications and specific examples, once it becomes clear to its potential for use:

  • Warm floor - the assembly is placed directly under the floor covering;
  • Help solidification of concrete - a cheap used cord, which after hardening of concrete remains inside;
  • Heated mirrors - power cord acts as an anti-fogging system;
  • Pipe protection in cold weather - the cord is placed in the pipe and constantly keeps the temperature above freezing.For sewerage and water supply is extremely important;
  • Constant temperature on the process conditions - maintains the temperature, being immersed in oil, water, beverages;
  • element drainpipes - helps prevent freezing, the formation of the ice cover;
  • heating greenhouses - is recessed into the thickness of the soil and creates a greenhouse effect, complicated installation is not necessary.

heating cable has the following advantages:

  • small cross section - can be used almost anywhere;
  • Easily bends - it can stretch, wrap, let around the perimeter of any object;
  • Minor heat losses;
  • can be cut into pieces of desired length;
  • can be laid in the open air, fluids in the soil.

The scheme of installation of the cable

Cable heating system is not without drawbacks:

  • Electrical - you need to properly observe the ground, to protect the cable from mechanical damage;
  • Faulty cord can easily become overheated and caught fire.This lack of - a common feature is the resistive cord (on a little further species);
  • undesirable to allow the overlap of the cable during installation - even the quality goes down.

Species cables

There are 3 types of heating cable - resistive and self-regulating zone.

Resistance - as the name implies, the cable operating principle is based on the heating at overcoming resistance.

This cable is very elastic, has a high power per unit length, which means that it can be ranked and create a concentration of heat per unit area - for underfloor heating, for example.

This type has one major drawback - the heat is not regulated, which means that there are cost overruns electricity.

Zone - consists of two parallel wires.

top of each of the wires laid lived with great resistance coil which closes periodically on either side, forming a parallel heating zones.

Each site is a separate heater is up to 1 meter in length.The thermal efficiency of the zonal-type cord is almost independent of temperature.

When operating zone of the cable must not be allowed to overheat, which almost always occurs when the cable overlap location.Self-Regulatory

your heating cable - the most profitable in every respect form the heating depends on the ambient temperature, economize on electricity, it can be cut into pieces of desired length.

Heat dissipation up to 100 W / m, while it varies along the length of individual sections - separately taken a piece of string reacts to external temperature alone.

Video:

most widely used because of its advantages and features of operation received view your self-regulating heat.

Selection and erection

In order to select the appropriate cable, you need to know the thickness of the insulation and pipe diameter - between them there is a direct correlation (left - the diameter of the tube to the right - the minimum insulation thickness):

  • 15 mm - 20 mm;
  • 20 mm - 20 mm;
  • 25 mm - 30 mm;
  • 32 mm - 30 mm;
  • 40 mm - 40 mm;
  • 50 mm - 50 mm;
  • 65 mm - 65 mm.

The larger pipe / thinner its insulation, the heat will take longer.

choosing cable, you need to take into account the following indicators:

  1. diameter pipe;
  2. pipe material;
  3. thickness of the insulation;
  4. heat loss pipe.

now consider the installation and its nuances.

Installation inside the pipe:

  • To introduce the cable into the aqueduct need caul;
  • If the cord is fed from the top down, it does not need fixing;
  • If the cord is fed from the bottom-up and need fixing;
  • Any sharp edging (fittings, thread) should be avoided;
  • In a place I put in a pipe tee / adapter in compliance with the seal;
  • The adapter insert a frame and only then serve it through the heating cable.

Forms and methods of attachment

Along water pipe cable is laid in a straight line, one of its edge is wrapped around a thin wire / rod / any thin object and held until the end of the entire section length after mounted in both terminals of the site.

Video:

can lay cable along the pipe coils: Do not allow overlapping, take a step, and can only strengthen the aluminum tape!

along the tube can be stretched several rows in a straight cord - just attach and aluminum tape.Anyone else just melted.

on individual sections running water - near the flange, valve, mounting takes place in such a way as to maximize embrace valve / flange on the perimeter, thus preventing overlap.

For warming sewage pipes need to wind the coils of frequent short steps - large diameter pipe, to warm up because you need more heat per unit area.

mounting methods:

  • cord is attached only by means of an aluminum adhesive tape;
  • On the tube is secured by individual cable lengths of adhesive tape every 30 cm, after the tape is wrapped completely - thus creating a large area of ​​the heat sink;
  • If plastic pipe, first paste over its entire tape, and only then you can install on top of the pipe string;
  • Cable installation on a water pipe or a sewer pipe can perform a herringbone pattern.Herringbone on one side and the other (4 can simultaneously) warm as the thickest pipe.

Installing the heating cable - the ability to prevent freezing of pipes, tanks.

And our legs with you is no exception: set within several rows of floor heating cables and the floor will be one big heating element.

A pipe sewerage and water supply in the winter to preserve the integrity: due to the cold does not crack, will not leak, and therefore reasons to perform urgent emergency work, when the window is not the first negative month.