Polypropylene pipe is widely used in equipping the heating and water supply systems, private houses, apartments, businesses, and other objects. Due to the fact that the pipe segments sold by 2-4 m, the individual segments have to be welded together to a firm sealed connection. In addition, it is necessary to take into account turns, branches, the transition metal with polypropylene and other nuances to be faced in the work.
In solving these problems will help fitting. It is a reliable tight connection element, which has a suitable plant's specific needs. This is either a turn or a connection between two segments or transition from plastic to metal, and tees, sleeves, and other embodiments, that aim to facilitate the working process and the possibility of building heating systems and water varying configuration.
Specifications polypropylene fittings
Understanding of the technical aspects of a polypropylene tube, allows to install correctly. Fittings also consist of polypropylene, we can accept the majority of proposals on the same market characteristics that belong to the pipes. In fact, among the technical specifications of modern polypropylene pipes and fittings, is isolated:
- Density. This criterion allows to achieve high resistance to stress, low abrasion of time, and the hardness and fracture strength. The average density is 0.91 kg per cubic centimeter.
- Thermal conductivity. As polypropylene tube, the fitting does not form a condensate on the surface, due to its low coefficient of thermal conductivity. That's why the pipe made of polypropylene is conveniently mounted under the floor surface or the walls that adds extra strength.
- High strength. With proper soldering we are guaranteed to get the reliable connection that will serve us for many decades. Importantly, do not drill the connection body, bend or subjected to a load at break. Modern connectors easily withstand pressures up to 10 atmospheres of water.
- Due to the non-reactive environment, products easily withstand the impact of concrete, plaster and other decorative materials. Together with the pipes can be exploited in factories and plants, in wet or too dry conditions.
- Resistance to temperature. Here, the calculation is to take the type of fluid, and the use of connectors and turns either indoors or outdoors. It is not recommended that the compound has been exposed to subzero temperatures, since under expansion of water upon freezing, polypropylene may easily burst. temperature brittleness fixed value from - 5 to -15 degrees. Do not forget about the wear. The higher the temperature of the carrier, the smaller it is the product. It is believed that the manufacturers were tested polypropylene at temperatures up to 40 degrees Celsius.
It follows another technical feature as a linear extension. Due to this criterion, the material is stretched in one meter of at least 10 mm, the coolant during operation of 40 to 90 degrees Celsius.
The main types of
Types of modern fittings for polypropylene pipes are not always made only on the basis of this material. There is a combined model, which combines the transition from plastic to metal. There are variations that suggest a flap represent faucet that provides control over the operation of a particular water supply circuit. Accordingly, the fittings can vary as intended, according to the method of use and installation. The following species can be distinguished on the market:
- Coupling. This adapter is intended for connecting two pipes of equal or different diameters. Accordingly, the clutch can be called the transition from plastic to metal since it also allows the connection of two kinds of pipes. Couplings tend thread, the nut, the sealing ring, which is especially true for plastic adapter with metal.
- Adapter. Here it is a question of polypropylene species which, for example, on the one hand has a diameter at the pipe 32, with different diameter understated, e.g., 25 mm. Adapters are needed to Sause loop piping system that allows you to create a positive pressure in the circuit.
- Area. With the area clear. This embodiment allows loop expand into position. The angle is 90, and 45 degrees. Their diameters may be equal, that is, the corner has gone 32-pipe out similar. It can be made narrower, which also can be easily achieved with the help of an adapter.
- American. With the advent of this compound assemblers could substantially facilitate their work. American represents a set of plastic and metal. That is, the plug-in connection that is sealed by a rubber insert. American which is installed in a detachable portions and heating water systems, e.g., on-site installation of the circulation pump and connecting the accumulator.
- Tee - a system element, which is designed to drain pipes in some parts. Tees are widely used when connecting a radiator, because they allow the heating element is powered and continue the system further. Like the corners, they may differ in diameter inlet and outlet ports.
- Polypropylene manifold used to distribute fluid in the main pipe. When proper skill collectors can collect yourself from tees, making for themselves the required number of taps. The collector of such a plan would be much cheaper than the usual metal collector warm floor in a private house.
- Crossings. This item is suitable for soldering boiler. The spider has four outlet, each of which is disposed at an angle of 90 degrees relative to each other.
- Bypass. It is a means of transition, which is important for the boiler equipment. Due circumscription can be hot or cold bypass pipe without breakage. The presence of these products can save considerable time at assembling work.
Constructive, functionality, connection type and the main diameters of polypropylene fittings
As the pipe fitting has a smooth surface inside and outside. So it does not affect the bandwidth within a closed loop. With each of the sides has a circular fitting opening for supply and discharge pipes, respectively. If the product is made entirely on the basis of polypropylene, before installing it is necessary to warm up, using a special soldering iron, properly selecting the temperature and heating time. In the case of a combined embodiment, for example, American, on one side perform soldering, the other producing assembly threadably using gas or sanitary key type "crocodile".
Any fitting has a diameter, which is determined in millimeters or inches. Among the most running sizes of fittings can distinguish models 20, 25, 32 and 40 mm. When working with them experience important because the heating time of the fitting and the pipe, depending on the diameter may be different. For example, for a diameter of 20 mm is recommended to keep a 4-5, 7-8 diameter for 25 seconds, 32 for about 10-12. All this individually, depending on the manufacturer of the material and the power soldering iron. Said exposure time for actual heating temperature soldering about 250-270 degrees.
As for the threaded connection, then the connection to the metal portion of the system or the installation of equipment, it is important to achieve a seal. For this purpose, flax and sanitary paste in the complex, FUM tape and other devices. Using flax is important to wind it in the direction of travel welling nuts, because otherwise the joint sealing will be broken.
Scope of polypropylene fitting
The main area of operation of the fitting on the basis of polypropylene - a water and heating. Let's look at the example of heating circuit of a small house. Suppose that we have derived from the boiler pipe 32 mm. To create a positive pressure in the circuit, it is necessary Sause channel to make the transition from the diameter 32 to 25 mm. To do this, use the lock fitting and the first solder it adapter to a smaller diameter, and only then solder the main transition. Likewise can be done in a corner, so that after rotation went smaller diameter pipe.
In order to make the removal of the battery will need a tee. The battery is usually connected to 20 mm in diameter, so the need to shift again. There corners and contours will be involved. Number is calculated individually for a specific master drawing at home.
In order to embed the circulation pump in the heating system at home, you should take advantage of American women entering and leaving the equipment. They will put the cranes that will facilitate the replacement by an emergency repair. American used wherever necessary to put detachable equipment.
The transition from metal to plastic a desired diameter is used during connecting the radiator and the installation water supply circuit. It is on the external thread of the transition will then be wound a hose coupling the valve to the hot and cold water.
The correct choice of the fitting in diameter - the basic installation of the nuances
The diameter of the fitting can be selected accurately by name. It is impossible to adjust the diameter of the fitting, by chamfering inside the product. When choosing a look for the pipe you are working with. It is always a marking which indicates the external diameter of the product. Without heating pipe enters into the fitting, because heating will remove the top layer.
If one for polypropylene diameter portion all clear, then selecting the diameter of the thread, need to be accurate. For example, a polypropylene strap vodorozetkami, for the most part is supplied with internal thread diameter for ¾ inches. However, there are options with a diameter of the thread ½, which should be considered for specific equipment and to look in the mapping table.
As for the Council, during the soldering fitting and after completion of work necessary to adhere to the following rules:
- After soldering, be sure to touch or visually that the internal diameter of the channel opening has not undergone deformation. Otherwise, if sealing water in the system will be an obstacle, resulting in a reduction in the circuit pressure.
- If you during the soldering fitting overdone, and at the moment, when the docking was carried out, it burst, it is recommended to cut off the damaged part. Use burst fitting prohibited, especially if you're going to put water under the screed or wall.
- After welding or heating circuit water is recommended to perform molding and check how well the loop keeps a predetermined pressure. This is important before pouring the floor screed, if the pipe is hidden.
- Try to use the fittings and pipes of the same manufacturer. Still polypropylene composition, for better weldability the material should be the same.
- To properly position the fitting with respect to the plane in which he will lie, produce and apply fitting pencil symbol in the form of strips. After heating, we just sostykuem notches. When soldering, to apply the notch pipe to a depth of 1.5 cm, so that its indentation into the fitting, do not transferring and not clogged inside the hole.
- Observe the temperature range of the soldering iron, do not overdo the fitting when heated, watch his appearance and lack of plant damage.