The fact that polymeric samples have a lot of advantages compared to metal pipe products, nobody needs to explain."Plastic" has become so widespread that almost everyone is familiar with it - if not at home, then at work the heating circuits from this product are necessarily assembled. But that's not all that is known - there are several types of metal-plastic pipes for heating installation, which differ in properties and specific use in heating systems.
With the exception of the price for 1 lm, metal plastic products( we will designate their MAT) significantly outperform the analogues of "pure" polyethylene and polypropylene. What exactly? This is worth considering more.
Key Features and Benefits of
It would not be right to describe all the properties of metal-plastic pipes literally, as many are common to products and from certain polymers.
For example:
- light weight;
- non-compliance with corrosion;
- smoothness of the walls and as a consequence, the constancy of the internal diameter, regardless of the time of operation;
- is an affordable price.
Let us dwell on the characteristic features of the MAT, that is, what exactly is reflected in the use of aluminum foil in the material structure. So it is easier to understand the feasibility of using these pipes in a particular heating circuit.
Pressure: maximum - 15, working - 10( bar). This allows you to lay the main line in the apartments in high-rise buildings. To use the cheapest products, from polyethylene, in high-rise buildings is not recommended taking into account the fact that at the time of the so-called crimping( checking the system under increased pressure) there is a risk of damage to the section of the route.
Temperature: maximum - 100, working - 95( ºС). It is quite enough, as in heating systems the coolant to a larger value and does not heat up. Relatively apartment buildings are understandable - this "degree" to the house simply does not reach, taking into account heat losses on the highway. In a private structure, the boiler will operate automatically, as exceeding the temperature limit will lead to a banal boiling of the liquid.
Required Strength. It is higher than for analogues made using only polymer. Therefore, when laying the route, less fasteners will be needed( it is possible to increase the interval between them), because they serve not only for fixing the pipes at the required height, but also to exclude their slack. What does it give?
- Savings. In this case - not in money( such fasteners, plastic ones, cost a penny), but in time. Who has ever been engaged in drilling brick or reinforced concrete walls, will appreciate it with dignity.
- Aesthetics are also a plus. It is clear that the less in a residential premise of various fasteners, the better.
Large range of sizes , which facilitates the choice of the optimal option. The outer diameter of pipes delivered to the market is from 16 to 63( mm).
Operating period of for installation in heating circuits - at least 20 years.
The disadvantages of metal-plastic pipes include:
Limiting bending radius. Unless otherwise agreed by the manufacturer, the average value is 5R( referring to the cross section of the sample).This disadvantage is relative, since in some cases only complicates installation, nothing more.
Firstly, , not every corner can be bypassed by bending the pipe. For a dwelling this is important, but for a basement - it's unlikely. In the first case, it is necessary to cut the material, and to connect the individual parts with the help of fittings( tees, corners).This will take additional time, and increasing the number of joints theoretically increases the likelihood of leaks.
Secondly, , when installing a system of a warm floor in a room with small dimensions, such a pipe to lay, most likely, will not work. The contour located on the floor is characterized by certain parameters, including the interval between parallel "threads".Although for large rooms this restriction for metal-plastic, as a rule, no.
"Fear" of ultraviolet radiation. And this is understandable, since the top layer is polymeric. But when laying inside a structure such a minus is also important to consider impossible.
Some difficulty in self-fastening pipes. If you "squeeze" a little( and the technique of welding a laser or connecting with ultrasound at home, as a rule, is not applied), you will have to trim the deformed part and put a new fitting."Underdeliver" - in this place there will be a leak. Hence, in the absence of experience will have to be trained. That is why professionals advise novice masters to purchase connectors somewhat more than the estimated number, since the probability of "getting stuck" is quite high.
Cost of
Without its instructions, the story will be incomplete. It is clear that the whole price range, given the variety of assortment, does not make sense. Therefore, only a few examples that will guide you in planning the cost of purchasing the material.
- 1 l.m. MAT - from 36 to 158 rubles.
- Fitting - from 49 to 205( rubles / piece).Such a spread of prices for additional elements is explained not only by the difference in diameters, but also in materials( plastic, bronze, brass and a number of others).
Note!
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Metal-plastic products are selected according to the diameter of the outer, rather than the conditional pass, as metal. Therefore, when buying should also take into account the thickness of the wall. - Experts believe that the MAT should be grounded. The argument is for equalizing potentials. As far as it is essential for a specific contour, only a professional can estimate.
- Marking depends on the type of polymer in the product. For the designation of polypropylene is used the abbreviation "PP-R", polyethylene - "PE-R".Varieties of the latter: cross-linked( which speaks for increased strength) - PE-X, heat-resistant PE-RT.
