Technical progress in the services sector forward constantly moving water networks. water storage and transfer means, are applied for the manufacture of ferrous metals (iron and steel), inevitably displaced. They were replaced by a completely new light, strong and durable polypropylene pipes. Their replacement, ie arrangement of the new water supply system includes a number of mandatory operations. Carefully reading the technological features of the manufacturing process, can be independently mounted electricity from polypropylene.
Scope and advantages of polypropylene pipes
Hollow bodies of circular section made of polypropylene are very popular due to the fact that they have a much longer period of use than metal counterparts. Manufacturers guarantee the safety of the water supply network is properly installed in the next 30-50 years. In addition, polypropylene is deprived of one of the main disadvantages that sin cast iron and steel products: it does not corrode.
Main applications of the polypropylene carrier - installation of plumbing and plumbing systems. The maximum temperature at which the system can be operated manufactured using polypropylene is 140aboutFROM. This is sufficient for use in home water supply, as the water temperature in the heating system considerably below the boiling point.
Basic design advantages polypropylene coolants:
- strength and elasticity of the material.
- reliability.
- high heat savings.
- good insulation.
- considerably smaller, compared with metal, the mass-mounted pipeline.
The basic design flaw polypropylene products - limiting the temperature of water in the pipes. Above 140 degrees it should not be lifted. Furthermore, it is necessary very carefully to protect the polypropylene from corrosion - alkalis and acids.
Polypropylene is an order of magnitude less than the metal and metal and plastic. It is ecologically safe, since the chemical composition of the fluid is the same in any part of the pipeline. The only condition to all these advantages converted into cash savings, is the observance of the rules of water supply installation or sanitary system.
Selection of pipes for the installation of domestic water supply
From the moment when the decision to overhaul the water supply system of a home, you need to very carefully consider the question of choice of the base material. As a replacement for metal pipes are widely used five types of pipes:
- Metal and plastic. May skip the carrier at a temperature up to 900 aboutC, but very bad bend.
- Polyethylene. Mounting systems may be carried out at a negative temperature and a wide range of pressure. The most suitable material for carrying out urgent repairs.
- PVC. They can not be used for laying pipelines because of the presence in the hazardous chlorine element.
- PES (XLPE). Products made of this material can be used in any transport and heated systems.
- Polypropylene. Thanks to the multilayer structure and excellent performance characteristics are the base material for mounting plumbing systems.
Polypropylene is much more popular in comparison with other materials that are used for the manufacture of plumbing systems. Only cross-linked polyethylene is comparable to polypropylene in performance. But it is less advantageous from an economic point of view as expensive polypropylene.
It is necessary to pay special attention to build quality water supply in the case when the central heating pipes made of polypropylene products to be used in the apartment. If during the installation will be mistakes, there is a risk of breakage of the installed equipment. To avoid additional financial costs should make the calculation system and correct selection of the measuring instruments.
Selection Rules polypropylene pipe sizes
Replacing metal pipes polypropylene involves a careful calculation. This is necessary for the normal functioning of the system during the whole of the claimed warranty lifetime of polypropylene products. Commonly used four types of pipes - PPs, PPR, PPB and PPH. In commercial networks the product comes in diameter from 16 to 1200 mm. For optimum heating systems is the use of pipes with a diameter of 16-32 mm. Determination of the calculated diameter of the water supply system helps to save on the cost of materials. Wider (40-50 mm, and in some cases - 110 mm) sewage pipes are used for mounting.
The right choice of size depends on two factors:
- the total length of the system;
- amount of water supply points.
minimum outer diameter is 32 mm for the connecting portions of the system. The internal wiring of the system may be performed using 16-20 mm diameter.
Required for normal operation of the internal diameter of the polypropylene tube system can be determined by a simple mathematical calculation:
Speed of movement of water in the tube is different:
- thin (10-25 mm) - 0.7-1.2 m / s.
- For thick (over 25 mm) - 1.5-2.0 m / s.
The difference is explained by the fact that the diameter decreases with decreasing ratio between the surface and lumen. When choosing too thin tube flotation will decrease due to the fact that the water velocity decreases when the flow strikes the inner wall.
Permeability in polypropylene media supply system depends on the following factors:
- number of turns and pipe joints of various sizes;
- the total length of the pipeline;
- pressure in the system;
- the inner diameter of the main pipe.
Selected for installation in the pipe system must meet the standards. The best way to avoid problems - purchase materials of one manufacturer. This will guarantee uniform regular geometric shape, smoothness, and absence of damage pipes all along the lengths dimensional segments.
Rules soldering pipes
To securely seal between an edge of the welded pipe, it is necessary:
- Measure the cuts of welded pipes;
- Produce bevel -
- with a slope 15about and the recessed 2-3 mm (DVS-2207-1 standard, Germany).
- the 45about and recessed at 2/3 the outer diameter (Russian Standard).
Soldering should be installed on a special stand. The optimum heating temperature of the working surface - 260 degrees.
The fitting is mounted on the mandrel - a special tip for welding. The heated tube is inserted into the sleeve. At the same time, and quickly removed from the heater parts are connected to each other. The holding time depends on the compound of the outer and inner diameters. When there is danger of overexposure joint deformity and loss of their elasticity. Bringing the sleeve until it stops at the junction, stop motion, as the presence of undesirable sagging its conductivity will be broken inside the pipe.
The dwell time of the pipe on the machine depending on the diameter of the seconds:
- 20 mm - 5;
- 25 mm - 7;
- 32 mm - 8;
- 40 mm - 12;
- 50 mm - 18;
- 63 mm - 24.
The easiest way to avoid mistakes - measure the depth of the liner. Having measured exactly the same distance on the tube, you can visually check the time of the joint. Connection speed of the heated pipe and the coupling must be maximized. In order to avoid lowering the quality of the welded joint is not recommended to turn the mating part around its axis.
Stages of installation polypropylene water pipe
Decided to replace the old water supply pipes to a more modern, made of polypropylene, it makes follow a simple plan of action:
- Project sketch Manufacturing.
- Material calculation (the number of pipes, fittings, couplings and other connecting members).
- Purchase of basic and auxiliary materials.
- centralized water supply ceiling.
- Dismantling of the aqueduct.
- Installation of new equipment and assembly system.
- Verifying the newly mounted water supply.
- Building materials.
Installation may be partial or complete. During partial replacement for damaged place new old pipes placed, made of polypropylene. It must be remembered that when installing the hot water system is absolutely necessary to install a pressure reducer. In addition, the collapsible connection must be open for permanent access parts of the system. Carriers for hot water should have a limit of water temperature of 75 degrees Celsius.
It is not recommended to install all the pipe water system to the fixed mounting. This can be done only in those places where there is a riser pipe, joints and corners. On straight pipe mount to the wall must be mounted to be movable. Terms of use of connecting elements:
- Coupling - for joints between a straight line segments, changing the diameters and the transition to using thread compound.
- Elbow - to rotate the pipe.
- Tee - for branching installation.
Important! labeled products PN10, PN20 for smeshannogo- or PN25 (reinforced) are used for the cold water supply.
Maintenance and repair of polypropylene pipes
Like any other material polypropylene, apart from the advantages, it has several drawbacks. On its performance can influence:
- high impact forces;
- excessively high water temperature;
- exceeding the rated pressure;
- reaction tubes with a chemically aggressive substances;
- mistakes made during installation.
Before starting any repair work should be carefully examine the water and identify the causes of technical problems.
If diagnosed depressurization joints in area (seats installation of measuring equipment, fastening hardware, and transmissions to other types of media), then there is the set bias at the junction of the sealing ring or defective fitting. To carry out repairs in the apartment must be:
- stop the water supply;
- dismantle the faulty joint;
- restore the integrity of the system area in the place of the leak by using the welding machine;
- install a new fitting.
In addition to the soldering apparatus for creating airtight joints polypropylene products can be used with rubbers and special glue. As used patches carefully crafted and low-fat alcohol piece of thin rubber. Secure the clamp is possible by means of wire.
This method of repair is temporary. On the failed joint is necessary as soon as possible to establish a new fitting.
To ensure smooth operation of the heating system, you must install a sufficient number of test equipment to control the pressure and temperature of the water. Automation should in time to prevent any failures. In case of breakdown repair of the system with their own hands would be technically straightforward. Also, it will not cause financial hardship. If you follow the rules of operation of the water system, it will last long and will not cause problems with the repair or replacement of equipment.