How to connect PVC pipes without a soldering iron. How to connect polypropylene pipes during a commercial break How to correctly connect polypropylene pipes

To install your own water supply from plastic pipes, you don’t need a lot of knowledge and experience, since this process is not complicated. However, to improve the quality of the work performed, it is necessary to familiarize yourself with the technology and some of the nuances of the connection pipe elements of such a type. It is also important to learn a few lessons about how to connect different types plastic pipe and the main points of this process.

Methods for connecting plastic pipes

Firstly, it is worth noting that plastic pipes include products made from the following materials:

Polypropylene.
Metal-plastic.
Polyethylene.
Polyvinyl chloride.

Each material has certain properties, therefore, the connection of products is carried out different ways, including soldering polypropylene pipes without a soldering iron (read also: " "). For greater awareness, it is worth learning the connection methods water pipes from the named materials.

Products made of polypropylene

Polypropylene pipe is the most popular material for plumbing. This is due to the presence of some advantageous points: reasonable price, high strength and long service life. Therefore, learning how to connect all types of plastic pipes should start with this type.

Polypropylene pipes are connected by welding with the obligatory use of couplings, angles, tees and other fitting elements. When connecting polypropylene pipes for water supply, you need to purchase pipes and fittings from the same manufacturer. Otherwise, even strict adherence to welding technology cannot guarantee complete tightness and quality.

To connect polypropylene water pipes with your own hands, you need to have the following tools on hand:

Special soldering iron. This is simply a welding device with a set of special attachments that allows you to connect pipes of different sections. In this case, the nozzle for each pipe is selected individually in accordance with its cross-section.
Cleaning up. This tool is used to cut off the reinforcing layer at the ends of the pipes. Stripping is used only for multilayer reinforced pipe products.
Pipe cutter By its name you can tell that the device helps cut polypropylene pipes.
A tape measure, pencil or marker may also be needed in the process of joining polypropylene pipe products.

Installation plumbing system made of polypropylene pipes is performed as follows:

Turn on and warm up the welding machine. The device must go through three phases: heating to a certain temperature, switching off, and reheating. The operating mode can be monitored by a light indicator (read also: " ").
While the soldering iron is heating, the reinforcing layer is stripped in the place where the fitting will be welded.
Remove dust and dirt from the surface of the elements to be joined and wipe well wet places. Please remember that failure to follow these steps may result in a weak connection.
The end of one pipe and the connecting element are inserted into the heating nozzle and kept for a certain period of time. The heating time must be strictly controlled, since holding it for a long time leads to deformation of the elements, and insufficient heating reduces the strength of the connection of plastic water pipes. Therefore, each welding machine is accompanied by a special table, which indicates the heating time of parts having a certain diameter.
The heated elements are pulled out of the nozzles and quickly connected. The strength of the connection also depends on the speed of action at this stage, so the process must be performed quickly but carefully. The pipe is inserted into the fitting until it stops, but it should not be deformed. The connected parts should be held until the plastic has completely cooled.
In a similar way, all elements of the water supply system are connected. To avoid damage to the material, you need to perform actions on unnecessary pipe scraps. The process of welding polypropylene pipes is quite complex, but after a few trial steps you can begin independent work. From the leftover material you can make various homemade products from polypropylene pipes, which look quite original.

Joining of metal-plastic pipes

You can also do the connection of metal-plastic pipe products yourself using one of three methods:

Connecting using compression fittings involves performing the following actions: the end of the pipe is put on the collet, secured with a compression ring and compressed with a clamping nut.
Connecting with crimp fittings involves compressing the ring at the end of the fitting using a special press.
Docking with push fittings is a new joining method that does not require any tools. This method may be the answer to the question of how to connect plastic pipes without soldering.

Regardless of the chosen method of connecting metal-plastic pipes, the tools should still be prepared. In particular, you will need a pipe cutter, which can be replaced with a regular mounting knife, and a calibrator, which can be any cylindrical object of a certain diameter.

The most popular is the connection of metal-plastic pipes using compression fittings, which involves the following steps:

First, the pipes are cut using a knife or pipe cutter, ensuring a right angle to the cutting line.
Before connecting the pipes, the cut ends are processed, that is, the diameter is calibrated and chamfered, using a calibrator in both cases.
The nut is removed from the fitting and placed on the end of the pipe, followed by a compression ring.
Now the collet is inserted into the end of the pipe, having first checked the presence of rubber O-rings.
Slide the clamping ring onto the collet and tighten the nut on the fitting. In this case, you should not allow the nut to be over-tightened, as this leads to damage to the rubber seals (read also: " ").

All water supply elements are connected in a similar way. Such installation is characterized by one advantage: a minimal set of tools for work, which any owner has at hand. Moreover, this is the only option that allows you to get plug connection necessary in some situations.

The connection using compression fittings is carried out in the same order, only the compression ring and nut are replaced with a ferrule ring. A manual or electric press is used to compress it.

Push fittings make it possible to connect metal-plastic pipes much faster than previous methods. To complete the work, it is enough to insert the prepared end of the pipe into the connecting piece, and all actions are performed without much effort.

Push fittings can be used to connect pipes made of metal-plastic and cross-linked polyethylene.

The connection using any of the listed methods is sealed and reliable, so you need to choose depending on the available tools and financial capabilities.

Polyethylene pipes can be connected using one of the following options:

Using compression fittings.
Welding using an electric coupling.

Connection with compression fittings is carried out in the same way as metal-plastic pipes, but in a certain sequence:

The pipe is cut and chamfered.
A clamp nut is placed on the pipe.
It is followed by a collet.
Next, put on the thrust and sealing rings in turn.
The pipe is inserted into the fitting body, all parts are moved to the edge and the nut is tightened.

This method is most often used when assembling household irrigation systems in country houses or on a summer cottage.

The connection of metal-plastic pipes in household water supply systems is carried out using electrofusion welding. Therefore, to perform the work you need to have a special welding device and an electric coupling with a diameter in accordance with the cross-section of the elements being connected.

The welding procedure involves performing the following steps:

Preparation of the surface of the elements to be joined. To do this, use a special scraper to remove upper layer tubular products and degrease the cleaned area.
The ends of the elements to be connected are inserted into the electric coupling, and the joint should be located exactly in its middle.
The electrofusion coupling is connected to the welding machine and the coils inside it begin to heat up. As a result, the polyethylene begins to melt and welding of the edges of the pipe elements occurs.

A machine for this type of welding has a very high price, therefore, if it is not intended further use, it is better to rent a device for a few days than to spend a large amount for its one-time use.

Pipe products made of polyvinyl chloride are connected using a special adhesive composition. However, it is very difficult to call it glue, since when the surfaces being joined are treated with this substance, the plastic melts and the edges are welded and not glued together. In other words, pipes are soldered without a soldering iron.

The process of connecting polyvinyl chloride pipes is as follows:

First, the edges of the pipes to be connected are cleaned of dust and dirt and dried well.
Then the ends are chamfered. This action must be performed so that the adhesive composition is not scraped off when connecting the elements.
Next, one end of the pipe is inserted into the fitting to measure its depth. Make a corresponding mark on the pipe with a pencil or marker.
The end of the pipe is treated with adhesive to the mark using a brush. At the same time, we should not forget that the glue should not be left on the surface for more than 25 seconds.
The elements are connected and slightly rotated to evenly distribute the composition over the entire surface. The glue should dry naturally without any external influences. The drying time of the adhesive composition may be affected by air temperature and other factors.

Based on everything said above, we can conclude that in most cases, connecting plastic pipes can be done with your own hands, without having special devices at hand and without possessing special knowledge and skills. The main condition is strict adherence to technology. It is also important to listen to the advice of professionals. This will help install the water supply without unnecessary material costs.

Modern technologies make it possible to create reliable and durable communications using polypropylene pipes. They are not subject to corrosion. Therefore they are widely used. But in this case important point is to connect polypropylene pipes with your own hands. This can be done by soldering or using a method without welding. Therefore, it is not necessary to involve a specialist. Let's look at each in more detail.

And for this process you will need a welding machine, which experts often call an “iron.” This device is a simple device that runs on electricity. In the kit it often has nozzles of different diameters with instructions.

The joining of such products occurs when their ends are exposed to high temperature. But there is one subtlety here. The pipes are heated from the outside, and the connection elements from the inside. This is the only way to get strong knots.

Step by step process:

First, the soldering iron is turned on, it should be heated to 270 degrees. The products are cut into the required pieces and cleaned. You can make convenient notes to understand what depth to immerse them in the heating apparatus.
We evenly insert the pipes and connection elements onto the nozzles of the device. This is also important for quality soldering.
After the element and pipe have melted, they are removed from the device and connected to each other. The evenness of the soldering is also important here. You need to press down lightly, but do not scroll around the axis. Pressure also affects the quality of soldering.
After joining the elements, they need to be held motionless for several minutes.

When performing manipulations, you should pay attention to one more important nuance. The inner surface of the seams should not lose permeability. After all, when melted, a small bump appears, which is dangerous if the product is of small diameter.

Heavy influx of material caused by excessive heating should also be avoided. To check the permeability of the pipe, you can blow it out and run water through it.

It is recommended that if you do not have soldering experience, you can first practice before starting to perform basic manipulations. And therefore, it is recommended to purchase materials with a reserve, because in addition to training, defects can certainly occur during the main work. It is highly undesirable to run or go to the store again while soldering is in progress. For more information regarding DIY soldering, you can also watch a video on the topic.

As for the device itself, it is not necessary to buy it. The device can be rented from someone.

However, this non-welding method has one significant drawback. The procedure time is significantly longer compared to welding. And this must be taken into account when choosing a pipe connection method.

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Conclusion

In short, there is nothing scary or very difficult about connecting polypropylene pipes with your own hands. As with most technologies, it requires clear and correct execution established technological standards. To do this, you can additionally familiarize yourself with video materials. Then the process will be completed not only quickly, but also efficiently. And this is already a guarantee of the durability and reliability of the resulting water supply or heating system.

It is not necessary to use welding. After all, you can get by alternative way. However, the disadvantage of this solution will be the increase in time of all work. Therefore, it is necessary to choose a method taking this point into account. Then everything will go smoothly, and the constructed system will acquire the required strength and reliability.

design-vannoi.ru

How to connect polypropylene pipes

Polypropylene pipes are much more convenient and practical than their metal counterparts. Their main advantages:

easy installation;
not a lot of weight;
not subject to corrosion;
not expensive.

Due to their advantages, they are becoming increasingly popular.

Another important advantage of this material is that you don’t need to hire anyone for installation; you can do everything yourself. Therefore, if you need to replace an old leaking water supply system, you can safely get to work. Polypropylene can be joined by soldering or using cold method.

Method 1 - soldering

This method requires the presence of a special welding machine, which experts call an “iron.” An iron is a kind of soldering iron powered by electricity. It comes with nozzles of different diameters.

If you are not going to professionally install water pipes, you do not need to buy such a device. You can rent it; usually all sellers provide this service. The process of soldering polypropylene pipes is not complicated.

Video: How to solder pipes with your own hands

Soldering technology

Polypropylene products are joined under high temperature. The pipe itself must be heated with outside, and all connecting elements are from the inside. This creates a strong connection.

Soldering stages

Turn on the soldering iron, it should heat up to 270 degrees C. While heating occurs, you can cut the necessary workpieces and clean them. For convenience, you can make notes that will show to what depth to immerse them in the welding machine. They are cut with a special pipe cutter or a regular hacksaw. If cutting is done with a hacksaw, you should pay attention to the burrs and if they remain, they must be cut off with a knife.
After the soldering iron has heated up to the required temperature, we insert the pipe and connecting elements onto its nozzles. For high-quality soldering, all elements must be inserted evenly. Movements must be fast and confident. Parts that are exposed to heat must not be moved or twisted.
When all the elements are well heated, they are removed from the soldering iron and connected to each other. This is also done with quick and confident movements. The parts are connected with light pressure (without rotation) and fixation for 10-15 seconds.
After this procedure, you can proceed to soldering the next unit and so on until the bitter end, when the water supply is completely soldered.

Method 2 - without soldering

This is a connection method that does not require soldering equipment. With this method, there are two options: connection with compression fittings and so-called “cold welding”.

For the option with compression fittings, you only need a special crimp wrench. This wrench is usually sold complete with fittings.

If you choose the “cold welding” option, then you will need a special “aggressive” glue. It is applied to the parts, after which they are connected and pressed, fixing them in this position for several seconds.

Connecting polypropylene pipes with glue is only suitable for water pipes with cold water. Connecting polypropylene pipes without soldering has a big drawback, namely, compared to soldering, the time required to install the pipeline is significantly longer.

In conclusion, I would like to say that there is nothing complicated in independently connecting polypropylene pipes. Like most others construction work, you will be required to conscientiously and strictly comply with all technological standards.

Then the process of connecting polypropylene pipes will be completed quickly and, most importantly, efficiently. And the quality of the work performed is the key to durable and reliable operation water supply and heating systems.

Watch the video: How to properly solder polypropylene pipes with your own hands

alina-sharapova.ru

How to connect polypropylene pipes without soldering?

Owners of private houses and apartments are often faced with the problem of pipeline restoration. Many of them decide to replace old products with polypropylene pipes. Even a person without special skills can install such a water supply system. However, first you need to figure out how to connect polypropylene pipes without soldering.

Cold connection of polypropylene pipes

General information

During the construction of private houses, they increasingly began to install polypropylene water pipes. The popularity of such products is justified by their low cost, long operational period, ease of installation and absence of rust. They are used to create water supply and heating systems. Three types of products are produced from polypropylene:

copolymer;
block copolymer;
homopolymer.

The above products can be combined different ways. Many people use the connection of polypropylene pipes without soldering.

Advantages and disadvantages of solderless connections

This method has several serious advantages, due to which some people refuse to solder pipeline elements. These include:

Small financial costs. During soldering, you have to use expensive equipment that is not available to everyone.
Easy to install. It is much easier to install pipeline elements without soldering, since you do not have to use a soldering apparatus and monitor such parameters as pressure and soldering temperature of polypropylene pipes.
Water pipeline restoration speed. If the products were soldered together and a serious breakthrough occurred, then recovery may take a long time. It will take time to wait for a specialist with the necessary equipment. This problem will disappear if you make connections in other ways.

However, connecting plastic pipes without soldering has one serious drawback - installation of the pipeline can take much longer.

Connection methods

Insertion into a polypropylene pipe without soldering is carried out using different methods. The choice of method directly depends on the purpose of the pipeline, the size and type of elements used. The most common connection methods include:

Use of flanges. This type of connection is quite reliable. The products are connected with bolts that are screwed into special holes in the flanges.
Use of fittings. These products are made of cast iron or steel. They are used when working with small diameter pipes. The advantage of fittings is that they allow you to make transitions between parts of the pipeline and connect them at different angles.
Use of couplings. To use them, threads are made on the pipes and wrapped with tow to make the connection more airtight.
Gluing. This method cannot be used for water pipes with hot water. During installation, glue is used, which is applied to the parts.

Fitting

If the technology of soldering polypropylene pipes is not used, then they are connected using fittings. They are connecting elements that are most often installed at turns and branches of the pipeline. The fittings consist of a body, a cover, a sleeve and a clamping ring located in a special socket. They also have a folded ring with which the polypropylene pipe is fixed.

When installing a water supply system, it is necessary to use pipes that comply with all standards.”

The ovality of the cross-section of products should be within 1% -1.5% of the diameter. If fittings with a diameter of less than 50 mm are used during operation, installation is carried out manually.

Before connecting plastic pipes without soldering fittings, you must adhere to step by step instructions:

Pipe cutting. They must be cut at right angles.
Removing hangnails. The surface of the products that will be placed in the fittings must be perfectly flat.
Installing the nut. It is removed from the fitting and installed on the pipe, after which the clamping ring is put on it.
Pipe installation. It fits into the fitting all the way and is secured with a nut and a clamping ring.

Flanges

Flanges are used if you need to connect plastic pipes without soldering. This connection is very reliable, as it can withstand temperatures up to 650 degrees Celsius and cope with pressures up to 20-30 MPa. The diameter of the flanges reaches 3000 millimeters. When choosing the optimal size, the pressure of the pipeline and the material of the products from which it will consist are taken into account.

Flange connection of PP pipes

Flanges are made of cast iron or steel. They can be:

Cast. They are part of the fitting or pipe structure.
Welded. It is made in the form of a washer, which will have to be attached to the structure yourself.

When using them, you must follow these recommendations:

At the place where the pipeline elements will be connected, you need to make special cut. At the same time, it must be done so that hangnails do not appear.
A gasket is installed on the cut, which should protrude by 15 cm.
The flange is attached to the gasket and connected to the flange that is installed on the second pipe.

Also, when performing such work, it is necessary to take into account the following nuances:

You cannot install two or more gaskets on one flange, as this will make the connection less airtight;
When installing the water supply system, it is recommended to use rag cardboard gaskets;
the bolts should not protrude too much above the nuts;
The gaskets must be installed in such a way that their outer cross-section does not touch the bolts.

Couplings

They are used during the creation of pressure and non-pressure pipelines. Connecting plastic pipes without soldering using couplings with your own hands is quite simple. To do this, just follow these rules:

the edges of the joined elements are cut so that the cut is perfectly smooth;
the place where the coupling will be installed is indicated by a marker;
the coupling is coated with a special lubricant;
Using a mark applied with a marker, the coupling is put on the pipe.

Connecting PP pipes with a coupling

Gluing

Connecting plastic pipes without soldering fittings can be done using glue. Before this, the surface of the products must be prepared. First you need to cut the product using special scissors and remove burrs sandpaper. All fitting and gluing locations are marked with a marker. After this, you can begin gluing, which consists of the following steps:

Degreasing. Before using glue, you must use a cleaner and degrease all areas where it will be applied.
Applying glue. The adhesive should be applied in a thin layer to the areas where the fittings will be installed.
Pipe installation. They are installed all the way into the fittings. This must be done very carefully so that the parts do not wobble too much.
Drying. The glue will dry completely within 15-20 minutes. However, the pipeline only needs to be filled no earlier than every other day.

Gluing PP PVC pipes

Conclusion

Polypropylene pipes are connected in various ways. Having figured out how to connect polypropylene pipes with each other and with metal pipes, you can install the pipeline yourself.

How to connect polypropylene pipes

Polypropylene pipes are used in the installation of water supply systems, for the installation of irrigation systems and for heating. Popularity of the material and various areas use is determined by its characteristics: strength, durability, ease of connection. An important argument in favor of polypropylene pipes was their price, which is significantly lower than that of metal-plastic or metal analogues.

The service life of a plastic pipeline with cold water is 50 years; such an impressive figure makes it necessary to replace outdated lines with this type of pipeline. Sealing of joints - most important factor for any pipeline, therefore the viability of the system depends on the quality of installation. In the article we will talk about how to connect polypropylene pipes with metal, polyethylene, steel, and also consider various options welding

Materials and tools

Soldering iron for welding

If you decide to save on installation services and do it yourself, then you need to buy or rent a special soldering iron with attachments. In addition to this you will need:

tape measure and marker for marking;
scissors for cutting plastic pipes;
cleaning for pipes.

There are several types of polypropylene pipes, which differ in their area of use:

PN 10, 16 – used for laying cold water pipes;
PN 20 – universal pipes with thick walls, they can withstand hot water with temperatures up to 80ºC, therefore they are suitable for heating installation;
PN 25 is a composite pipe with a metal or nylon layer, which is peeled off during soldering. It is used for heating systems, the final heating temperature is 95°C.

Polypropylene pipes and fittings

Distinctive characteristic connection of polypropylene pipes is the absence of joints directly between the pipes. If their diameter is less than 50 mm, all parts can be connected with fittings for various purposes:

couplings - connect sections of the same diameter;
crosses - used to create branches;
plugs - seal the end of the pipe;
adapters - used to connect pipes of different diameters;
union fittings - connect to flexible hoses.

How to operate a welding machine

Welding polypropylene

The principle of connecting a pipeline is to heat the elements and quickly connect them. Household pipe welding machines have a power of up to 1 kW. It is enough to quickly and efficiently heat the material, but for industrial purposes more powerful and expensive devices are used. The soldering iron comes with attachments that match the diameter various pipes. The pipe is heated from the outside, and the fitting from the inside.

The operation of the soldering iron begins with connecting it to the network and setting the desired heating temperature, depending on the diameter of the plastic pipes being welded. The average value is 250–270°C. Such heat requires caution, touching a hot part will cause a burn; for safety reasons, you should wear gloves.

Soldering process

To cut pipes, use a hacksaw or sharp scissors that do not deform the plastic. The incision is made at a right angle. If burrs appear on the end, they are carefully cleaned off. After cutting, the soldering depth is marked. You need to measure the section of pipe that will fit into the tee or coupling and mark a line with a marker. The size of this section depends on the diameter of the pipes; the larger it is, the greater the immersion in the connecting element.

Pipe stripper

If you have to work with reinforced pipes, the algorithm of actions changes. Before soldering, it is necessary to clean the top layer of the pipe, consisting of aluminum foil, basalt or nylon fiber. A special tool is designed to remove the required layer size.

Careful removal of the foil is very important; a small amount of material remaining on the pipe will ruin the tightness of the soldering.

Reinforced pipe

A soldering iron with nozzles selected according to the diameter of the pipes is installed on a flat and durable surface. On both sides, a pipe and a fitting are simultaneously put on the heated nozzle, deepening to the intended line. The heating time of the plastic depends on the size of the pipes: for 20 mm, 6 seconds are enough, and for 32 mm, 8 seconds are required. After maintaining a set period of time, the elements are removed and firmly fixed into each other, while turning movements must not be made. For strong adhesion of the joint it will take from 4 to 10 seconds, during which time the polypropylene will harden and form a permanent connection.

Heating temperature and time

Failure to comply with the recommended heating time leads to the formation of leaks - due to insufficient heating or sealing internal space- with excessive overheating. If a melt appears, you should not try to remove it immediately; the melted plastic will become more deformed. You need to wait until it cools and cut off the excess.

Try to solder less by weight

Without experience, in order to understand how to solder pipes correctly, you can make several training connections. It is convenient to work with short connections by placing the welding machine on the table; in this position you can complete all possible job, and joining a partially laid highway is more difficult. The soldering iron nozzle is put on a fixed polypropylene pipe, and a tee is inserted into the second part, while the device is supported by weight. When making a highway, you need to monitor the order of the connections being made. Try to avoid docking hard to reach places where it will be difficult to use a soldering iron.

It is important to keep the material clean and dry, because dirt and moisture reduce the quality of the pipe connection. Not even a large number of moisture deforms the material when heated. The chemical composition of pipes from different manufacturers may not be the same, this will lead to leaky joints. It is necessary to buy all the material - pipes and fittings - from one manufacturer.

The temperature in the room where polypropylene is installed should not fall below +5°C.

Crimp connection method

Connection diagram using a collet fitting

Pipeline joining by soldering is reliable and durable, it is impossible to disassemble it, and sometimes this is exactly what is required for repairs. In addition, it is not always possible to purchase or borrow a welding machine; in such cases, they use the method of connecting polypropylene pipes without soldering. For this, fittings with threads and a clamping ring are used. They are called collet or crimp, such a connection can withstand a pressure of sixteen atmospheres.

For mechanical connection you need to purchase several additional details: angles intended for joining of different diameters, tees, soldered and combined couplings, having external and internal thread, plugs, adapters with external threads, elbows and tees with a union nut, Ball Valves, various fittings with factory threads.

Clamp fitting structure

To ensure tightness, joints and seals are generously lubricated with silicone.

To work, you will need a crimp wrench, which can be purchased at the same time as the fittings. Having cut off the required part of the pipe, firmly insert it into the fitting, wrap the thread of the element with thread to seal it and tighten the ferrule and nut, completely tightening it with a wrench. This connection method takes much longer than welding, but it is convenient for connecting polypropylene pipes to radiators.

Compression fittings

Joining a steel pipe with a polypropylene pipe

When installing heating or plumbing, there are areas where metal and plastic need to be joined. The connection between a polypropylene pipe and a metal pipe occurs using special adapters. This fitting has a smooth plastic hole on one side and a threaded metal insert on the other. The polypropylene pipe is connected by welding, and the metal pipe is screwed with a wrench. The resulting joint does not have the strength of a welded joint, but will serve for a long time.

Connection with metal pipe

After complete installation the system needs to conduct a test run of water to check the tightness of all connection points of pipes and other elements. If threaded connections leak, they need to be tightened.

Self-installation plumbing or heating from polypropylene pipes is a completely doable task. To implement it, you must strictly follow the instructions for using the plastic welding machine and installation technology. To better understand all the nuances of the process, you should watch a video in which experienced installers share their experience.

How to connect a polyethylene pipe to a polypropylene pipe

To connect such pipes you need to use special fittings. Such a connection is necessary in cases where water was introduced into the house using HDPE pipes, and further distribution of water inside the house is carried out using polypropylene pipes. So, we can distinguish 2 types of connections:

In the first case, you attach a threaded coupling to the HDPE pipe, where there will be a clamp connection on one side, and a similar coupling on the polypropylene one. It’s just that there will be a solder joint on one side, and a threaded joint on the other. In both cases, FUM tape or tow is used for threading to seal the joint and avoid leaks.
In another case, a flange connection is used. Installed between flanges rubber compressor. The flanges are bolted together.

Most often, so-called cold welding is used for this. This technology involves the use of an adhesive composition special purpose and fittings.

Advantages of using pipe connections without hot soldering

If you are thinking about how to connect a polypropylene pipe to a polypropylene pipe, then you can use a method that involves the use of special fittings. This technique has many advantages, among which we can especially highlight the increased efficiency of installation of drainage and water supply systems, the reduction of the possibility of leaks that can occur during butt welding or when chemical compound. Among other things, the described technology is less labor-intensive and also requires less energy consumption. Among other things, it is associated with lower material consumption. they are quite cheap. Using fittings and glue, you can connect pipes of various diameters, which range from 6 to 400 millimeters.

Comparison of cold soldering with mechanical and welded joints

Before connecting a polypropylene pipe to a polypropylene pipe, you should consider all the advantages of the cold soldering method. Thus, this technique, with low material consumption, speed and quality of work performed, is not inferior to traditional welding. This gluing technology does not require the use of special equipment, which greatly simplifies manipulations. You don’t have to use a special machine designed for welding, which consumes quite an impressive amount of electricity during operation. Due to this, it is possible to reduce costs installation work. If you are faced with the task of how to connect a polypropylene pipe to a polypropylene pipe, then it is worth comparing the mechanical mating of elements using fittings. The latter technology is not so energy-intensive, but more material-intensive. This is due to the need to purchase additional fittings, which increases the cost of work.

Features of connection using fittings and glue

If you do not know how to connect a polypropylene pipe to a polypropylene pipe, then it is important to familiarize yourself with the technology. To do this, you will need to use glue, which is intended for connecting pipes to parts such as fittings. The latter are most often made from chlorinated polyvinyl chloride. After application, the glue begins to dissolve the surfaces of the parts by 1/3 of the thickness. This makes it possible to implement diffusion cold welding. This process is affected by air temperature and humidity. Before connecting polypropylene pipes using cold welding and fittings, you must ensure that the temperature environment ranges from 5 to 35 degrees. If there is a need to carry out installation work at temperatures below zero, then you should purchase frost-resistant glue, which can be applied until the thermometer drops to -18 degrees. If the work is carried out in hot weather, then gluing must be done in a much shorter time, which will eliminate the possibility of the composition drying out before the manipulations are completed. Before connecting polypropylene pipes using the described technology, you need to make sure that the glue has a uniform consistency, sufficient fluidity and does not have foreign inclusions.

During breaks between work, containers with adhesive composition it is necessary to close it as tightly as possible, which will prevent the evaporation of volatile active components.

Technology for connecting pipes using fittings and glue

If you decide to use the cold connection method, then you need to use the technology described below. At the first stage, you need to cut off part of the pipe in such a way that you can obtain an element of the required length. For this purpose it is recommended to use a pipe cutter, special scissors or a hacksaw, the latter of which has fairly fine teeth.

If you are thinking about the question of how to properly connect polypropylene pipes, then next stage At the end of the product, a chamfer is removed, and it is important to maintain an angle of 15 degrees. In the process of carrying out these manipulations, a chamfer is used; it is important to prevent the formation of burrs. The next step is to thoroughly clean the fitting socket, as well as the pipe, from dust, dirt and moisture.

In order to achieve effective cleaning connecting elements, you need to use cleaners designed for pipes made of CPVC. With the help of this composition it will be possible to prepare the surfaces well enough for further gluing.

Nuances of the work

If you are faced with the task of how to connect polypropylene pipes without a soldering iron, then at the next stage you can apply glue. In this case, you need to use a brush, carefully distributing the composition over the surface of the socket and pipe. The elements are inserted into each other; to distribute the composition evenly, you need to rotate the fitting 90 degrees relative to the pipe. The parts are fixed for 30 seconds, during which time they should not be rotated again. It is important to complete the entire process within 1 minute. If you are thinking about how to connect polypropylene pipes without soldering, then after gluing is completed you need to check the presence of a bead, which is a uniform adhesive layer, located around the circle. You may need to get rid of excess glue using a soft rag.

Why is it worth using the cold method of joining plastic pipes?

Before connecting polypropylene pipes with fittings, you need to weigh all the positive and negative aspects of other technologies. If we are talking about an adhesive connection, which was described above, then it is worth highlighting the advantages that it is possible to carry out high-quality installation pipes even in places where access is particularly difficult. The master will not have to use additional expensive equipment, which can consume a large amount of electricity during operation. It is possible to carry out the entire process independently, without resorting to the help of professional companies. In the process of gluing parts, a structure is formed monolithic type, which ensures the tightness of the joint. If you decide to use adhesive cold welding, then, unlike conventional welding, no sagging will form on the inner surface of the product, which can narrow the gap and contribute to the settling of solid particles.

Conclusion

If you connect polypropylene pipes to each other, following the simple rules and recommendations described above, then leaks and sagging of the pipeline will be eliminated. The service life of a pipeline installed using this method can reach 50 years.

Compared to metal and metal-plastic pipes, polypropylene analogues are cheaper, more durable and more reliable. Another important argument in their favor is the ease of connection and sealing of joints, which has a positive effect on the viability of the entire pipeline system.

What parts do polypropylene products fit into?

If you don’t know how to connect polypropylene pipes, our explanations will come in handy. This type of pipe is in demand when preparing water supply, heating and irrigation mains. Due to the long service life of polypropylene pipes in the water supply network, which is about half a century, this type is increasingly preferred as a replacement for worn lines. And also these pipes are perfectly combined with auxiliary elements made of steel and polyethylene.

All polypropylene pipes, according to the scope of application, are classified into types:

Conventional pipes for installation of cold water pipelines (PN 10, 16).
Universal thick-walled pipes for carrying heating system, withstanding hot water with a temperature of +80ºC (PN 20).
Composite pipes having a layer of metal or nylon that is peeled off during soldering. Used for installation of heating systems where the maximum temperature hot water can reach +95ºC (PN 25).

Polypropylene pipe connections are distinguished by the absence of seams between the components of the pipeline.

If their diameter is less than 50 millimeters, you can use all kinds of fittings:

couplings for connecting sections of the same transverse size;
crosses to form branches;
plugs for sealing the ends of the pipe;
adapters for joining pipe products of various diameters;
union fittings for connecting pipes with flexible hoses.

Pipe soldering

Let's consider connecting pipes using the soldering method:

Using a hacksaw or sharp scissors that do not deform the plastic, cut the pipes at an angle of 90°. If you don't know how to cut a pipe at an angle, you need to read more information.
If there are burrs on the end, carefully clean them off.
Mark the depth of the soldering, i.e. measure a section of a certain length on the pipe to fit into the coupling or tee and draw a line with a marker. Remember that the length of immersion into the connecting element is directly dependent on the diameter of the products. The larger the pipes, the greater the soldering depth.

The algorithm of actions will change slightly if the pipes are reinforced. Then, before the soldering process, it is necessary to process the top layer of the tubular product, including aluminum foil, basalt or nylon fiber. By using special tool the required layer size can be easily removed. Need to pay Special attention to carefully remove the foil. Even a slight excess of it on the pipe will negatively affect the tightness of the solder joint.

Further steps in the soldering process:

Place a soldering iron with nozzles that are pre-selected according to the diameter of the pipes on a smooth and reliable surface.
At the same time, a pipe and fitting are placed on the hot nozzle on both sides, moving it to the marking made with a marker.
Heat the plastic, holding it certain time, which depends on the diametrical size of the pipes. For example, if the value cross section the product is 20 mm, then 6 seconds are enough to warm up; if 32 mm - 8 sec.
Then the elements are removed from the nozzle and ensure a strong fixation into each other. Never make any turning movements.
To ensure strong adhesion of the joint, you need to wait 4-10 seconds. This time will be enough for the polypropylene to harden properly and obtain a permanent connection.

Please note that it is very important to comply required time heating If heating is insufficient, leaks may form. Excessive overheating will lead to sealing of the space inside the pipe and the occurrence of meltdown. You shouldn’t delete it right away, because... heated plastic will begin to deform even more. It is better to wait until the product has completely cooled down and then remove the excess.

Before you begin the process of soldering pipes, it is better to perform a couple of practice joints. It is easier to work with small joints by installing the welding machine directly on the table. This way you can check how correctly the pipe soldering is performed.

But attaching elements to a partially finished pipeline will be more difficult:

Place a soldering iron nozzle on the polypropylene pipe, insert a tee into the other part, holding the welding machine suspended.
In preparation main water supply It is necessary to alternate subsequent connections. In hard-to-reach areas, it is better to avoid joining work due to the difficulty of using a soldering iron.
The material must be dry and clean, because the presence of dirt and water will reduce the quality of the joint. It is known that the material, if wet, can deform when heated.
Purchase all products (pipes, fittings) from the same manufacturer, because the chemical composition of elements from different manufacturers may differ, which will ultimately lead to a leaky connection.
Temperature in the room where work with polypropylene is carried out, it should be optimal and not lower than +5̊C.

Connecting pipes using the crimp method

Often, repairs will require disassembling the pipeline. If the connection of the main components is made by soldering, which is reliable and durable, then disassembling it is almost impossible. Let's look at how to connect polypropylene pipes without a soldering iron, which cannot always be bought or rented from friends. IN in this case you will need threaded fittings with a clamping ring, which are called collet fittings (crimp). And for good reason, because this kind of connection can withstand loads of up to 16 atmospheres.

In order to connect the pipeline components together using the crimping method, additional parts will be needed:

tees;
soldered and combined couplings with internal and external threads;
squares;
adapters with external thread;
plugs;
Ball Valves;
tees with union nut;
all kinds of threaded fittings;
sealing rings for socket joints of polypropylene pipes, etc.

You need to pay attention to one nuance: to ensure reliable tightness, all seals and joints are generously treated with silicone.

Further actions:

Cut off part of the polypropylene pipe.
Insert it securely into the fitting.
Wrap the threads of the part with thread to seal.
Pull the ferrule and nut on top.
Use a crimp wrench, which you need to take care of in advance, to completely tighten the pipe elements.

Compared to welding, this method takes much more time, but it is very convenient for connecting polypropylene pipes and radiators.

Docking combination of metal and polypropylene

When installing plumbing and heating systems, there are places where it is necessary to connect steel and plastic pipes. For such cases, you will need special adapter fittings, which have a smooth hole for a plastic pipe on one side, and a threaded metal insert on the other. Therefore, the polypropylene pipe is joined by welding, and the steel pipe is tightened with a crimp wrench. As a result, the resulting connection is inferior in strength to a welded one, but will still last for many years.

Please note that upon completion of installation work, it is necessary to carry out trial run water in the system. This way you can check the tightness of the joints of pipes and pipeline components. Threaded connections may leak and must be immediately tightened with a wrench.

As we see, it is possible to carry out self-installation plumbing or heating system made of polypropylene pipes. The main thing is to impeccably comply with the requirements of the instructions for using the welding machine and the installation technology. Watching a video on this topic will be very useful.

Compound of polyethylene and polypropylene

This option of the line involves the purchase of special fittings. They will be needed if water enters the building through HDPE pipes and is subsequently diluted using polypropylene pipes. In such cases, soldering of HDPE pipes with a soldering iron for polypropylene is quite often carried out, which is quite acceptable.

Let's consider two cases of how to connect polypropylene pipes without welding with polyethylene pipes:

A threaded coupling is attached to the HDPE product, on one side of which there is a clamp connection. A similar threaded coupling is also mounted on the end of the polypropylene pipe, with a solder joint on one end and a threaded joint on the opposite end. To avoid leaks and achieve high-quality joining, tow or FUM tape is applied to the threads.
Using a flange connection. The rubber seal is located between the flanges, which are bolted together. Read also: "".

Pipelines made of polypropylene, if assembled with high quality, can last up to half a century without repair. Popularity of plastic communications in construction individual houses is explained, among other things, by the fact that installation polypropylene pipelines available for self-execution.

The choice of method for connecting plastic pipes depends on the availability of special tools, the nature of the materials being connected, and the purpose of the communications.

All methods for installing polypropylene pipes can be divided into two large categories. One involves welding materials by heating an organic polymer to a melting temperature. The second includes all “cold” joining methods, with the exception of cold welding.

Welded joints are called permanent joints. Diffusion processes are involved here. Homogeneous polymers are mixed at molecular level, forming a monolith. This connection is the most durable, but requires a special tool or glue (if cold welding). The second disadvantage is the impossibility of temporarily dismantling communications without destroying part of the structure.
Detachable (threaded) connections are made using special fittings. They are used when joining thin-walled pipes of small diameter, when making structures from different materials, joining polypropylene with polyethylene, with metal elements.

Diffusion welding

A distinction is made between butt welding (pipe to pipe) and using additional fittings (socket welding). These are technologies based on the melting of polypropylene, which differ in the nuances of the work.

Diffusion socket welding carried out on polypropylene pipes with a diameter of 16 to 40 mm.

Here the fitting serves to supply additional polypropylene to make the connection reliable.

For thicker-walled materials, butt welding is carried out, connecting the parts of the pipe directly, without the use of additional parts. Manufacturers of polypropylene materials offer fittings entirely from polymer materials, combined, with transition to thread for metal elements.

The fitting configuration is selected based on the characteristics of the pipeline. Manufacturers offer the following types connecting elements:

corners, tees, couplings;
fittings for connecting elements of the same diameter with transition to another diameter;
all-polymer or polymer-metal combinations;
with internal and external thread.