Soldering process
The main condition for high-quality welding is the mating of parts made of plastic having one chemical composition. Only when this condition is fulfilled, the parts can be heated to the same temperature and due to the identical flow of plastic, the welded seam will turn out to be of high quality. Therefore, when choosing plastic pipes, it is important to pay attention to the brand of all the details, but not the color. Color does not determine the quality, it's just the presence of pigment, which does not affect the properties of the polymer. 
Welding of polypropylene pipes can be carried out butt and in the socket. For the welding of polypropylene pipes, the first thing to do is to clean off pieces of pipes from contaminants. Especially it is necessary to carefully remove fat, oil, as this can be dangerous. For cleaning use alcohol, acetone or other solvents. Rags should not be fibrous.
If the surface of pipes has traces of destruction under the influence of ultraviolet or air, then they are mechanically scrubbed. Soldering is carried out using a special soldering iron for welding polypropylene pipes. And, when welding it must be taken into account that it is impossible to sharply cool the welded seam. Sharp cooling can loosen the seam. In the event that soldering takes place at low temperatures, the resulting joint is insulated with a cloth or heat insulator to prevent sharp cooling.
To start soldering, a welding temperature of 260 ° C is required, and to achieve this, the power of the soldering iron is not important if the mandrel and the coupling are in contact with the heating plate over the entire area. The power of the soldering iron is responsible for the time during which the desired temperature regime will be reached. The welding time will depend on the dimensions of the welded product. The parts must be heated for the time that is recommended in the regulatory documents. Pipe diameter 16mm and 20 mm should be heated 5 seconds, 25 mm - 7 seconds, 32 mm - 8 seconds, 40 mm - 12 seconds, 110 mm - 50 seconds. If the standard heating time is exceeded, the plastic will melt and the parts may deform, and if the heating is insufficient, the soldering will be weak and leakage may subsequently occur. 
The welding process itself is not complicated. First cut off the necessary amount perpendicular to the axis. If we are dealing with a pipe reinforced from the inside, then first we need to clean the top layer, and then remove the foil from the shaver.
Welding machine, already prepared and brought to the desired temperature, simultaneously heat and pipe and fitting. Once they are warmed up, insert it into the fitting and press it against the longitudinal axis. When the details are fused to change their position is impossible. 
Apparatus for welding polymer pipes
So, for the connection of parts, the following tool will be needed:
- Welding machine up to 1500W of power, which can be supplied from 220 V.
- Teflon-coated nozzles for.
- Stand for soldering iron.
- Pipe holder.
The device for welding polypropylene pipes( soldering iron) consists of a heating head on which attachable attachments are attached. The nozzle consists of a coupling and mandrel. Dorny elements are elements that heat the internal surfaces of fittings, couplings are the outer surfaces of pipes. The heater basically has the form of a triangular plate, therefore it is also called an iron for welding polypropylene pipes. Considering the dimensions of the plate, the size of the nozzles is selected, since the large diameter of the pipes is welded with a few other welding equipment.
How much does it cost to buy a welding machine or order a soldering service
The price for welding machines is quite high from 20,000 rubles to 100,000 rubles. If you do not plan to do this type of activity the main one, you might think about renting a welding machine. For example, depending on the nozzles, there is such a price range for the 
