If you are thinking about the question of how to connect a polypropylene pipe to a polypropylene pipe, it is important to know that high quality in carrying out such work can only be achieved if the thickness of the walls of the products is taken into account. Modern technology allows you to create from such pipes a fairly durable and reliable communications. They are not subjected to corrosion processes, and therefore found so widespread. Such manipulations can be carried out in one of several ways, however, you can classify the work into two categories:
- method of soldering;
- use of fittings.
Ways of connection
If you decide to learn how to connect a polypropylene pipe to a polypropylene pipe, you need to understand the ways. For example, thin-walled pipes can be threaded. If it is necessary to equip a cold water supply system with a medium temperature not exceeding +20 ° C, then products marked PN 10 should be used. The same applies to laying warm floors where the temperature does not exceed +45 ° C.
If a cold water supply system is required to be transported at elevated pressure, pipes marked PN 16 should be used. This recommendation is relevant for low pressure pipelines. The best connection option is welding, it can be used for pipes PN 20, which are able to undergo a temperature of up to +80 ° C. Their walls are thicker than the previous ones.
The same method of connection is also suitable for PN 25 - aluminum foil reinforced pipes, which are designed for central heating and hot water systems. Pipes with this marking will be able to withstand temperatures of up to +95 ° C. The joints can be all-in-one when welding is used; and also detachable, in this case the thread is used.
Before you connect the polypropylene pipe with polypropylene, you need to figure out which method is best used. For example, for a threaded connection, it is necessary to prepare fittings with thread, as it is impossible to cut the threads on polypropylene products. The connection is made using a special tape, which will make the joint strong and reliable.
If you decide to use a threaded connection, then you will need:
- solder joints;
- triple corner;
- angles of 90 °;
- combined squares;
- ball valves;
- solder joints at 45 °;
- adapter with an external view of the thread;
- fittings made of polypropylene with factory thread.
If you are thinking about how to connect the polypropylene pipe with polypropylene, then you can use the weld method. However, it is important to consider that the connection will be one-piece. When melting, the molecules of one part move to another, diffusion occurs. From heating with a welding electric apparatus, the parts are organically joined together, because they have the same chemical composition.
To carry out the work, it is necessary to prepare:
- soldering iron;
- apparatus for welding;
- polypropylene fittings and pipes;
In addition to the listed tools and materials, you should prepare a hacksaw or scissors for metal, tape measure, couplings by type of cranes, corners and pipes. It is important to stock up with a tape tape. As for the welding machine, it will consist of a heating element and welding nozzles, the diameter of which varies from 16 to 40 mm.
As soon as the indicator goes out, you can start work, because this will signal that the desired temperature is reached at 260 ° C. It takes about 15 minutes. If there is a minus ambient temperature, then welding work should be abandoned. If you need to weld pipes with a diameter of 60 mm, you should use the method of socket fusion. 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 with a diameter that varies from 16 to 50 millimeters, a manual soldering iron should be used. More impressive diameters will be connected by a mechanical welding machine. The ends of the pipes should be well heated with removable sleeves, then it will only be necessary to press the elements together, applying a small effort. Such an impact should last a few seconds.
Welding of the electric coupling 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 fixation will disappear. To supply voltage to the heater inside the coupling, devices with electrodes are used.
Recommendations for conducting fusion welding
Before connecting two polypropylene pipes by the socket method, it is necessary to cut the products at a right angle.Then the master should put a mark on the depth of the socket, to which should be added 2 mm. The connection of the products starts with a warming-up using a special device. After the details are connected together. And if the polypropylene has an aluminum layer, then the connection can be made through perforated holes. This makes it possible to significantly increase the strength of a pipe marked PN 25.
Before connecting polypropylene pipes with each other, it is necessary to think about which method is best used. Probably, butt welding, which will allow connecting pipes for external sewage, is suitable. This approach is relevant if the pipe wall thickness exceeds 4 mm.
At the first stage, the welding points should be tilted to parallelism. After that, it is necessary to carry out heating and ensure the accuracy of the centering device. Welding should be accompanied by airing the room, because polypropylene produces carbon dioxide and water vapor, and also smoke.
Connection without soldering
Quite often novice home masters are wondering how to connect polypropylene pipes without soldering. For this purpose, shaped parts made of the same material as the pipes are usually used. If the heating system has a fiberglass-reinforced line, other types of products will not work.
It should be stocked with polypropylene fittings, which are reinforced with fiberglass. As an exception, there is a case when it is necessary to connect polypropylene with other material. In this case, threaded elements are used, for example "American". Before connecting polypropylene pipes without a soldering iron, it should be asked which fittings can be found on sale for the arrangement of water supply and heating systems, among them:
Use these elements is necessary, given the way of application and position. By the type of connection, several types of shaped products are distinguished, namely:
Crimped polypropylene fittings are supplied ready-made, there is no need to collect them additionally. Crimp fittings have advantages over welded fittings. They consist in:
- ease and ease 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 in installing crimp fittings.
Recommendations for work with fittings
If you are pondering the question of how to connect polypropylene pipes at home using fittings, you should familiarize yourself with the technology. At the first stage, construction tools are prepared, namely:
- gas and adjustable keys;
- car keys;
- special scissors;
- pipe cutter;
You can think about the location of the pipes, which can be in the wall or on top of it. In the scheme there should be no hard corners. Flexibility of products is achieved with a construction hair dryer. If you decide to use polypropylene pipes for heating, how to connect them, you should know.
The joint should be sealed in any convenient way for you. You can do it with a tape. Then the system is assembled according to the principle of the designer, on the corners and at the points of distribution of the flow into several parts, special elements such as corners 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 in the process there is diffusion, which ensures the reliability and strength of the system.