Not to do without use of pipes at the device of heating systems, they are applied both to water supply, and to other needs. The term of operation of ready designs and trouble-free operation depends on material selection.
Metal was applied to creation of communication pipes long time, but unattractive appearance of products, problems in service, constantly appearing scum and other minuses have demanded to find other opportunities.
With the advent of polypropylene the metal elements began to replace with more convenient and lightweight plastic gradually. They are everywhere applied to the equipment of systems of the sewerage, heating and have rather strongly become usual.
Usability of pipes polypropylene
The polypropylene reinforced represents the material created with use of modern technologies. It is convenient to use it for creation of pipelines, weight is easier, than at iron. It is necessary to refer elasticity and the increased resistance to the impact of corrosion and chemicals to pluses. Polypropylene products are safe in the ecological plan.
Polypropylene pipes manage cheap, their mounting does not differ in complexity and can be executed with success nonprofessionals. It is not necessary to be afraid of leakages, except for cases when during assembly time of the pipeline mistakes have been made. Pipes propylene are made in two versions.
Types of material
Before using polypropylene in work, it is worth understanding, what is it. Material represents plastic which has the raised thermal expansion coefficient. Pipes from it will perfectly serve at temperature up to +95 degrees. Such plastic at +140 degrees is softened, melting temperature - +175 degrees.
Heat-resistant material, but under the influence of the elevated pressure or hot water is capable to change form. For strengthening of strength characteristics and lowering of the level of longitudinal expansion the reinforcing of pipes is in addition carried out. For this purpose aluminum or fiber glass can be applied. The bracket frame which properties do not allow products to change the sizes, to increase in length or width is created.
Pipe from polypropylene, fiber glass reinforced
Materials with fiber glass make in the form of composite from three layers. Average is fiber glass which connects to polypropylene layers. The design turns out high-strength if to compare to initial materials, it will have thermal expansion coefficient several times smaller. Due to solidity the reinforced propylene is not subject to stratification.
Propylene reinforced products differ in good indicators as for elasticity. Pipes software turn out flexible, mounting them therefore does not cause difficulties. Also time which should be spent for installation is reduced significantly – before carrying out pipe joint the cleaning of layer of aluminum will not be required.
The pipes from polypropylene reinforced by aluminum
When using aluminum for the reinforcing layer use aluminum foil. It can be integral or with perforation, thickness of 0.1-05 mm. The foil is placed between plastic layers outside and from within. Apply the special gluing structure to connection. External the foil layer which becomes covered with decorative plastic before carrying out welding is smoothed out from aluminum. It helps to exclude engagement of metal and water and provides to welding high quality at which there will be no leakages.
The integral foil does not pass oxygen in the heat carrier. At its excessive quantity the heating appliances can be struck with corrosion. But the foil due to smoothness is not always capable to enter strength connection with the surface of plastic. Therefore it is necessary to apply only the special gluing structure at attentive respect for technology, otherwise for molecules of water the possibility of penetration through walls remains.
At moisture skaplivaniye under aluminum on surface of product there are bubbles. To reduce the probability of damage of products, the polypropylene reinforced by aluminum began to be produced everywhere with use of perforated material. In foil there are evenly placed openings which help more reliable fastening of layers. In total product there will be a little bigger permeability of oxygen, but it does not go beyond norm.
Comparison of the reinforced pipes
At very similar operation capabilities of pipe, fiber glass reinforced, do not demand special ways for connection performance. Before performance of mounting of polypropylene pipes in which the aluminum layer, before welding is required to remove it.
Inserts from metals have property to separate polymers mechanically, during operation because of it communications can collapse, leakages begin. To the welder with brief experience will work with such products difficultly.
With fiber glass apply classical way to welding of products. The main advantage before aluminum at fiber glass that sites of connection turn out monolithic. The coefficient of longitudinal expansion at metal is more, than at fibreglass, approximately for 6%. Using the products reinforced by aluminum for creation of the pipeline, it is necessary to consider that in position of joints the vulnerability will be increased therefore at the subsequent operation it is necessary to support constantly control and in time to carry out service.
Opportunities for operation
Plastic products even when strengthening by additional layer do not cope with all operational loadings. It is possible to apply successfully such pipes to water supply – both cold, and hot, to equip hot-water heating. But you should not use such materials for creation of steam contour.
To define technical capabilities of products, it is necessary to pay attention to their marking. It contains data on composition of material, on what pressure products, about possible temperatures at which operation is allowed are capable to maintain.
When marking from polypropylene apply designations in the form of digits and letters on surface of products. The pipes software supplied with the reinforcing aluminum layer are marked as PPR-AL-PPR. They are subdivided into groups:
- The pipes consisting of five layers.
- Continuous reinforcing, aluminum layer without perforation.
- In the center of products perforated aluminum layer.
At aluminum layer color can be miscellaneous – this part does not matter. In marking it can be specified instead of PPR – PEX what means availability of different layers.
As pipe fitting of software is made
Installation of the pipes reinforced on technology is very similar to that that is used when welding normal polypropylene products.
Use such methods:
- Threaded connection.
- Pasting by carrying out cold welding.
- Diffusive welding.
The best way for pipe joint of reinforced consider diffusive welding.
To execute welding of the polypropylene pipes reinforced by aluminum, add the procedure of cleaning of piece which should be connected to normal process, from metal particles. These actions are carried out with application of special purpose tool – sheyver.
Generally reinforced pipes from polypropylene apply at arrangement of communication systems in private country grounds. Products from plastic most of all correspond to requirements of most of buyers and quite approach at cost. Repair and service do not cause difficulties. Pipes software perfectly are suitable for long operation.