We decided to self-assemble inside the heating of a country house? You do not know where to start? Today decided to use high-tech PVC materials for this purpose, in order to properly equip the heating wiring that does not require a special care, periodic financial investments for the restoration of defective nodes.
Today, PVC pipes are cheap, which is an advantage.
Content:
- Types of plastic pipes for heating
- Advantages and disadvantages
- Characteristics of plastic pipes for heating
- Mounting
Types of plastic pipes for heating
Polypropylene It refers to thermoplastics. Transforming their physical characteristics under varying ambient temperatures.
In operation, the heating circuit (at 140 degrees centigrade above zero), the pipe is softened. At 175 degrees above zero melt construction. Therefore, manufacturers have set operational limits, at which the heating elements are used wiring.
PVC material has a high coefficient of thermal expansion. After reviewing the typical calculation, it is seen that when operating the system - from 20 to 90 degrees centigrade above zero, polyvinylchloride construction average lengthened by 3 centimeters.
It is better not to use in the northern regions, where there are extremely low temperatures outside. After the coolant in the heating system is heated above the boiling point. And this can not be tolerated.
If you use plastic in cold regions, the pressure on the PVC walls will be 6-7 kg / cm 2, and wherein the water temperature - 125 degrees (plus sign) - construction possible gap which prevent must not
On the market there are varieties:
- PVC;
- polypropylene;
- polyethylene;
- XLPE.
polyvinylchloride affordable material, because of its choice for many buyers. Products made of this material - a high degree of rigidity, so the connection structures can be carried out using specialized fittings, sanitary ware purchased in stores.
Use expensive instruments in this situation do not have to, it is not necessary to acquire and glue imported solutions that are expensive, too. The polypropylene constituting the heating system is kept coolant temperature to 90 degrees Celsius. This kind of more expensive PVC.
polyethylene components suitable for heating installation, since they are resistant: high temperature, corrosive environments, adverse external influences.
Polyethylene elements are known for strength and reliability. Stitched polyethylene undergoes additional processing. During exposure to high temperatures for PVC raw materials, at the outlet, the material is strong, since acquires additional molecular bonds.
The cost of about 2 times higher than other types of manufactured on the basis of PVC. The peculiarities of such products include: resistance to temperatures inflated. The highest levels - a hundred and twenty degrees above zero.
On the shelves there are products:
- not reinforced;
- with foil;
- reinforced with fiberglass.
Each subspecies has the features:
- reinforced design - tech plastics, for example, sheet.
- With foil 3 layers are glued together.
- reinforced - resistant to thermal expansion. The reinforcement acts as a stabilizer, reducing strain on the wall during exposure to high temperature coolant.
- Reinforced with glass fibers the most successful subspecies. The advantages of such structural elements is that they can simply be welded to each other, and after the work did not have to do any cleaning PVC surfaces.
The present embodiments are suitable for heating of houses, cottages, apartments. But the user must remember that no reinforcement, even strong, will not prevent the expansion of the plastic walls, if the coolant temperature fluctuates in extreme limits.
Unlike metal and plastic
Plastic design more complicated in structure. They are made:
- plastic;
- special glue;
- foil.
Length changes in the operation of such products is unlikely. Designs are used even in those areas that have a complex geometry. But to connect the segments in any case, do not use soldering, some other methods:
- press fittings (plug connections);
- carving materials;
- Compression (conditionally releasable).
Unlike metal-polypropylene construction fear sunlight and mechanical loads. To mount the plastic, desirable experience in this area (heating installation). Besides fittings overgrown with sludge, rust (because of poor heat transfer medium quality). It is not uncommon in the operation of the heating system in the city.
If the tube pinch - will break the monolithic structure. The cost of these products above polypropylene, so the second (PVC) wins embodiment, consumers prefer products with low cost and burdensome installation.
Advantages and disadvantages
Pros:
- continuous operation (50 years);
- Setup Method: overtly or covertly;
- elements are not subject to corrosion;
- installation is quick, no encumbrances and complexities;
- products are environmentally friendly and safe for humans and the environment;
- PVC materials are poor conductors of heat and weigh little.
Disadvantages:
- the impossibility of using the structural elements in fire extinguishing systems;
- during the operation, there are some limitations;
- each type - a unique mounting technology.
Characteristics of plastic pipes for heating
temperature should not be higher than one hundred and twenty degrees, otherwise, the structural elements will fail. Plastic components have a high index of thermal expansion (about 0.15 mm per m * C). Therefore, to avoid plastic elongation wall temperature observed standard operation mode.
High-tech plastic pipes can withstand up to - 15 degrees Celsius. This indicator is important in the case if the scheme is established in a country cottage and in case of force majeure may freeze.
At -5, -10, -12 degrees Celsius system in any case will not fail during defrosting and will also function effectively as before.
Technical characteristics of plastic components suggest that they have a low density (about 0.91 kilograms per square centimeter). Material PVC hard abraded during operation, it is sufficiently firm.
Because it is not necessary to fear, that the elements will fail due to small particles (rust flakes, together with the circulating coolant). The inner surface of the product is not scratched by mechanical means, the elements will not hurt, because the leaks should not be afraid.
Mounting
Plastic components are attached to the radiator:
- side, bottom;
- single- and two-tube method.
To build a heat pipe, the master will need:
- Clamps and adapters;
- Ball valves and plugs;
- Couplings for joining;
- Crosses and tees, a few joints with thread.
Before proceeding with the assembly scheme will connect with each other and the main structural elements of the pipeline. Connect: boilers, battery. After that, the master holds the wiring and begins to assemble the circuit.
PVC products are welded to each other in series (by stages).
- For a start will have to cut pipe products in the sizes you need. After this, the materials are cut special tool - cutter. Places slices necessarily carefully protected.
- Welding takes place using high-tech soldering or special tools heating. Initially the device is turned on, and the master waits for a few minutes until the device heats up, the temperature reaches 260 degrees Celsius. After welding of pipes begins. Each element is heated for 10-15 minutes.
Only for a while the product is still plastic, so the material you need to quickly connect to the surface did not have time to deform and harden. As a result, if the special operations carried out according to the instructions, according to the regulations, the output is a monolithic piece.
Heating suitable high tech fiber reinforced pipe. Installation of products is simple and easy. During the installation of polypropylene pipes, in any case it is not necessary to install wiring butt: to the walls, floor, ceiling.
During installation clearance is left. PVC structural elements for heating is not desirable to use, where in the winter the temperature drops to minus 25 degrees Celsius - wiring break. In this situation, only installed metal pipes.
