Heating in a block of flats. Distribution of heating. Plastic pipes for heating
The person who has become the new owner of the house, oftenfaces the problem of rusty and dilapidated pipes. Nothing surprising, because if the house has served more than one year, then surely such systems as water supply, heating and sewerage, significantly worn out.
Other problems start to emerge here.For example, a heating stand in an apartment building is a common property, for the replacement of which all tenants must pay. And if the maintenance of the house is carried out by housing management, and the replacement of the riser is urgent (for example, in case of an accident), then the problem falls on the shoulders of the staff of this institution.
Features of replacement of risers and heating pipes
To replace the heating pipe, you must perform the following steps in sequence:
- Close and drain the water.
- With the help of the Bulgarian, cut out old pipes and pull them out of the slabs.
- Determine the location of the battery and install it using a level and a puncher.
Advice: before the beginning of work it is better to get permission from neighbors living above and below, as if in the ceilings the heating pipe remains the same, repair will lose its meaning.
It is important to remember that the installation should be donein accordance with the level, since the skew inevitably leads to the accumulation of air and the poor functioning of the battery. Far from being superfluous is the purchase of cutting off cranes that allow you to block the site (for example, if a leak happened), without violating the operation of the system as a whole.
If you plan to do it yourselfinstallation works, the optimal option is a metal-plastic pipe, which easily accepts any shape. Special threaded connections allow fastening.
Heating distribution requires the purchase of metal pipes (preferably stainless steel).
Drawing up the scheme
Installation work can not be started without the most detailed scheme. For this it is necessary to determine the type of heating, the type of the system and the ways of laying the pipes.
The heating distribution can be two-pipe orsingle-tube. The first option provides for direct and reverse wiring. So it will be easier to regulate the temperature in the house. After completion of the calculation of the number of pipes, their length and diameter, you can proceed with installation work.
Variants of schemes of spreaders for heating
If the preference was given to a single-tubevertical system, then as the location of the supply line should choose the top floor or attic space. Thus, a vertical heating riser will be able to supply the heat medium to each heating device.
The advantage of this is the economical use of pipes, and the disadvantage is the inability to separate the heating devices separately.
In the case of a two-pipe verticalheating system with a lower wiring, the supply and return lines should be carried directly on the floor or slightly above its surface. This allows each radiator to be provided with its coolant. This choice leads to an increase in the length of the pipeline, but it allows you to adjust the heating and turn off the heating device at any time.
The horizontal two-pipe system assumeslaying of the return and supply pipeline along the perimeter. Each heating device must be equipped with a special crane, which allows air to be released from the structure. This scheme assumes floor heating off and the use of radiators with a lower connection.
The choice of a two-pipe floor collector system involves the installation of a supply and return manifold. During installation, plastic pipes for heating are used.
Switch off riser
How to properly switch off the heating pipe? The lower spill is a pair connection. The simplest version of determining its location is to go up to the apartment located on the floor above and get acquainted with the location of the jumpers.
If the house is top filling, then the riser switch-offheating involves the overlap of one valve, both in the basement and in the attic. How do you determine where they are located? The main thing is to choose the right entrance, and calculating the position of the valve itself is easy. After closing both cranes, you need to unscrew the plugs and open the reliefs. A complete check of the water should be followed by a check of the serviceability of the shut-off valve. Everything, the heating pipes in the apartment building are off!
Important! Implementation of works during the heating season is possible only if there is access to the apartment located at the top. If no one lives in it, the start of heating will not be possible.
The easiest way to disconnect the heater is to cut the lining to it. Then, a counternut is given, and the edge of the piping is unscrewed from the radiator plug.
How to choose the right place for cutting the riser? Everything depends on the relations with the neighbors living above and below. Practice shows that the heating riser is better to change through the overlap, since the destruction of pipes by corrosion is most often observed in places of contact with concrete.
The modern market has a huge assortment, so the buyer only needs to decide which plastic pipes for heating he wants to install.
- cross-linked polyethylene.
The positive characteristics of the first include:
- resistance to corrosion, therefore, a long service life;
- excellent patency and unchanged diameter, as the formation of salt deposits is impossible;
- a low level of roughness of the inner layer, which guarantees a minimum loss of pressure of the coolant;
- minimum linear expansion, and this is the most important indicator for heating, especially if there is a hidden wiring;
- high values of frost resistance.
Why are metal-plastic pipes inherent in suchhigh technical characteristics? It's all about the multilayer structure: polyethylene (2 layers), aluminum foil (1 layer) and adhesive composition (2 layers). In addition, metal-plastic pipes can boast the following properties:
- The maximum operating temperature is 95 ° C.
- The working pressure parameter at the above temperature is 10 atm.
- When the temperature drops to 25 ° C, the working pressure increases to 25 atm.
- The temperature is allowed to reach 130 ° C for a short time.
The heating rack in the apartment is often connected with polypropylene pipes. They have many positive qualities. These include:
- affordable price;
- flexibility, allowing to obtain any desired shape;
- long service life;
- good resistance to high temperatures;
- high thermal conductivity.
Pipes made of cross-linked polyethylene
The heating system can also be extendeda pipe made of cross-linked polyethylene-material, which is not afraid of high temperature effects. Polyethylene itself is soft and plastic, which is incompatible with heating, but scientists have been able to identify a method that turns it into a strong product.
Technical characteristics of cross-linked polyethylene:
- operating temperature maximum - 95 ° C;
- ability to withstand pressure up to 7 atm .;
- a decrease in temperature to 70 ° C increases the working pressure to 11 atm.
Compliance with the maximum load thresholdguarantees the service life of pipes made of cross-linked polyethylene for at least 50 years. We can not ignore the high indexes of flexibility of finished products. In addition, almost all manufacturers produce a long-length hose (the bay can reach 200 m), which provides a seamless construction of the heating system. Minimized number of joints reduces the likelihood of possible leaks.