If you have thought about the question of how to connect a polypropylene pipe with a polypropylene pipe, then it is important to know that the quality of such work can be achieved only when the thickness of the walls of the products is taken into account. Modern technologies make it possible to create quite durable and reliable communications from such pipes. They do not undergo corrosion processes, therefore they are so widespread. Such manipulations can be carried out in one of several ways, however, the work can be classified into two categories:
- soldering method;
- use fittings.
If you decide to learn how to connect a polypropylene pipe with a polypropylene pipe, you need to understand the ways. For example, thin-walled pipes can be threaded. If it is necessary to equip the cold water supply system, the temperature of the medium in which does not exceed +20 ° C, then products with the marking PN 10 should be used. The same applies to the work on laying warm floors, in which the temperature does not exceed +45 ° C.
If it is necessary to arrange a system for supplying cold water that will be transported under elevated pressure, pipes with the marking PN 16 should be used. This recommendation is relevant for pipelines with reduced pressure. The highest quality connection option is welding, it can be used for PN 20 pipes, which are able to withstand temperatures up to +80 ° C. They have thicker walls than previous ones.
The same method of connection is suitable for PN 25 - pipes, reinforced with aluminum foil, which are designed for central heating systems and hot water. Pipes with this marking will be able to withstand temperatures up to +95 ° C. Connections may be permanent when welding is used; and also detachable, in this case the thread is used.
Before you connect a polypropylene pipe with a polypropylene pipe, you need to figure out which method is best to use. For example, for a threaded connection, you need to prepare threaded fittings, because you cannot cut threads on polypropylene products. The connection is made using a special tape, which will make the joint durable and reliable.
If you decide to use a threaded connection, then you will need:
- solder couplings;
- triple square;
- combined crosses;
- squares at 90 °;
- combined squares;
- ball valves;
- solder squares at 45 °;
- an adapter with an external view of the thread;
- water outlet;
- factory fitting polypropylene fittings.
If you are thinking about how to connect a polypropylene pipe with a polypropylene pipe, then you can use the welded method. However, it is important to consider that the connection will be one-piece. When melting the molecules of one part moves to another, diffusion occurs. From heating by the electric welder, the parts are organically interconnected, because they have the same chemical composition.
For the work should be prepared:
- soldering iron;
- welding machine;
- polypropylene fittings and pipes;
In addition to the listed tools and materials, you should prepare a hacksaw or scissors for metal, tape measure, couplings for the type of taps, angles and pipes. It is important to stock up fum-tape. As for the apparatus for welding, it will consist of a heating element and welding tips, the diameter of which varies from 16 to 40 mm.
As soon as the indicator goes out, you can start work, because this will be a signal that the desired temperature has been reached at 260 ° C. It will take about 15 minutes. If the ambient temperature is below zero, then welding should be discarded. If necessary, the welding of pipes with a diameter of 60 mm should use the socket welding method. For a more impressive diameter, butt welding is suitable, which does not involve the use of additional parts.
Recommendations for joining pipes by welding
For pipes whose diameter varies from 16 to 50 millimeters, use a hand-held soldering iron. More impressive diameters will be connected by a mechanical welding machine. The ends of the pipes should be well heated with removable sleeves, then all that remains is to press the elements together with a little effort. Such an impact should last a few seconds.
Electrofusion welding acts as a more successful option compared to the previous method, because the process is controlled by the program. The quality of the joint will be higher, and the need for fixing will disappear. To supply voltage to the heater inside the coupling, devices with electrodes are used.
Recommendations for socket welding
Before joining two polypropylene pipes by the bell-shaped method, it is necessary to cut products at a right angle.Next, the master should put a mark on the depth of the socket, to which should be added 2 mm. The connection of products begins with warming up using a special device. After the parts are interconnected. And if polypropylene has an aluminum layer, the connection can be made through perforated holes. This allows you to significantly increase the strength of the pipe with marking PN 25.
Using butt welding
Before you connect the polypropylene pipes together, you should think about which method is best to use. It may be suitable butt welding, which will connect the pipes for external sewage. This approach is relevant if the wall thickness of the pipe exceeds 4 mm.
At the first stage, the welds should be turned off to parallelism. After it is necessary to carry out the heating and ensure the accuracy of the centering device. Welding should be accompanied by ventilation of the room, because polypropylene emits carbon dioxide and water vapor, as well as smokes.
Quite often beginner home masters wonder about how to connect polypropylene pipes without soldering. For this purpose, shaped parts made of the same material as pipes are usually used. If the heating system is composed of fiberglass-reinforced mains, then other types of products will not work.
You should stock up with polypropylene fittings that are reinforced with fiberglass. An exception is the case when there is a need to connect polypropylene with another material. It uses threaded elements, such as "American." Before you connect polypropylene pipes without a soldering iron, you should ask which fittings can be found on sale for arranging water supply and heating systems, among them:
These elements must be used, taking into account the method of application and the provisions. According to the type of connection, there are several varieties of shaped products, namely:
Crimp polypropylene fittings are supplied in finished form, in addition to collect them is not necessary. Crimp fittings have advantages over welded. They are:
- ease and simplicity of installation;
- no need to use welding equipment;
- the possibility of installing polypropylene fittings in all weather conditions, because they are not afraid of negative temperatures;
- there is no need for the master to have special skills for the installation of crimp fittings.
Recommendations for work using fittings
If you are thinking about the question of how to connect polypropylene pipes at home with fittings, you should be familiar with the technology. At the first stage, construction tools are prepared, namely:
- gas and adjustable keys;
- carob keys;
- special scissors;
- pipe cutter;
You can think about the location of pipes that may be in or on top of the wall. The scheme should not be hard corners. The flexibility of products is achieved with the help of a building dryer. If you decide to use polypropylene pipes for heating, how to connect them, you should know.
The junction must be sealed in any way convenient for you. You can do this with a fum tape. Then the system is assembled on the basis of the constructor principle; at the corners and in the places where the flow is distributed into several parts, special elements such as angles and tees should be used.
Now you know how to connect polypropylene pipes with fittings. However, as practice shows, the welded method is more reliable, because diffusion occurs in the process, which ensures the reliability and durability of the system.