Connecting couplings for polypropylene pipes without soldering. Methods for connecting polypropylene pipes. Using couplings

01.11.2019

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Standard in the past metal pipes Today, they are increasingly being replaced by plastic, or more precisely, polypropylene (as well as PVC). And if a welding machine is usually used to install the former, then the polymer analogues are mounted using a special soldering iron. However, the latter may not be at hand at the moment when it is necessary to solder one of these pipes. Is there a way out of this situation? Actually yes. In addition, here we will look at soldering wires.

Installation of water supply, drainage and heating systems;
Repair work on heating and water supply systems;
The need to connect two wires;
Repairing the awning - sealing the holes.

Is there an alternative to a professional soldering iron for polypropylene pipes?

Before we sort out the soldering of wires and awnings, let's focus on the pipes. The machine for welding them costs several thousand rubles. Mostly professionals buy it for themselves, but for the average person this device simply will not pay for itself. In this regard, we have to look for Alternative option, which may become much more widespread in ordinary houses gas-burner.

This burner performs well both in repair and installation. At the same time, it can solder both small-diameter pipes and fairly large analogues. It is used not only for connecting pipes, but also as a means of installing plastic taps to control the flow of water into the pipeline.

Tips for connecting polypropylene pipes without a soldering iron

The quality of the connection largely depends on the cleanliness and absence of grease on the pipes themselves. Therefore, before work, it is recommended to degrease and clean them from dirt;
All pipes, as well as fittings and other parts must be from the same manufacturer. This way you will be sure that the same temperature effect must be applied to connect them. In addition, you should not skimp on quality. Its absence may appear both during the soldering process and during subsequent operation;
Do not solder in cold conditions. If, for some reason, the room temperature has dropped by less than +5 degrees, the connection may be fragile;
It is recommended to practice on unnecessary sections of pipe.

Alternative - PVC pipes

There are plastic pipes that do not require soldering, since they can be glued together. In addition, they have all-plastic pipe threads located on the internal and external sides.

In addition, there is a special solvent-based cement for PVC and CPVC pipes. After treatment with this cement, the surface becomes soft and can be quickly glued together.

The procedure for soldering polypropylene pipes

Compilation detailed diagram, marking of turning points, location of taps, corners and other elements of the system;
Pipe cutting. It is best to take with a margin of 25 millimeters, which will be fused onto the fitting;
The pipe and fitting are heated using a burner. The temperature is approximately 280 degrees Celsius;
The fused elements are held together until they cool.

A universal method of soldering an awning

With the arrival of the warm season, the need for awnings increases. By putting it on your house plot or taking it on a picnic small awning, you may find an unpleasant surprise - a hole. Is it worth buying a new awning after this or can I somehow correct the situation?

For soldering we need construction hair dryer, which will have a special crevice nozzle, as well as a patch with a roller. After preliminary cleaning the damaged area and patching it from dust and grease, it is necessary to place the awning on flat surface. Having attached the patch to it, we begin to heat both surfaces using a crevice nozzle, simultaneously securing it with a roller. The better you heat the surfaces, the better they will stick to each other. But here it is extremely important not to overdo it and not burn a hole.

Soldering wires without a soldering iron using soldering tape

Despite the fact that a regular soldering iron is found in our homes much more often than its counterpart for plastic pipes, it may still not be at hand in right moment, when you need to connect two wires. Of course, you can try to twist them and wrap them with “blue electrical tape,” but this option is only temporary. At the same time, you can connect wires “forever” without a soldering iron.

A special soldering tape will help us with this, which allows us to create a strong layer around the wire. polymer layer, providing complete connection and isolation problem area. The stages of working with this tape are as follows:

Stripping the wires that we will connect and their subsequent twisting;
Removing the protective layer from the tape and wrapping it around the twisting area;
Heating the tape with an open flame until it melts and evenly covers the problem area. Regular matches are suitable for this;
After the tape has cooled, remove excess flux. The wire is fully connected and ready for further use.

Welding wires using special paste

Paste is used to connect various metals such as steel, nickel, copper and others. The reason for this versatility is that this material produced on the basis of silver. In general, the paste contains flux, solder and binding components crushed to a powder state. In the vast majority of cases, this method is used for soldering small wires. So, if your favorite headphones are out of order, and you don’t have a soldering iron at hand, then ideal solution it will become just paste. The way to use it is extremely simple:

We clean the wires and twist them together;
Apply the paste to the twist area as evenly as possible;
Using a regular lighter, the paste is heated until it melts and turns into a full-fledged solder;
After this, it is necessary to insulate all exposed parts of the wire. The ideal means for this is a heat shrink sleeve. We put it on the joint, then heat it up and get reliable insulation.

Proper connection polypropylene pipes guarantees durable and very reliable communications that do not rust and have a number of other advantages.

We are interested in tubular products that are characterized by low weight, simplicity machining and installation, as well as at a relatively low cost, they are connected in detachable and permanent ways. The latter refers to welding performed using one of two technologies: butt welding or the coupling (socket) method.

Butt welding is ideal for polypropylene products with a cross section of more than 6.3 cm. In this case, the thickness of their walls must be at least 4 mm. The procedure is carried out in a stationary welding unit, providing very precise installation with different geometric parameters. Their ends are trimmed before the operation begins in order to obtain completely parallel surfaces. The butt welding machine has a special disk - it functions as a heating device.

Butt welding of polypropylene products

Also, when carrying out such a procedure, in most cases it is necessary to use centering elements. They give the polypropylene products being connected the necessary alignment. Socket welding is recommended for pipes with a cross-section of less than 6.3 cm. This type of connection requires the mandatory use of couplings and fittings. Without them, the procedure is not performed. Fittings that have special sockets are used to form various docking units (including threaded ones). And the coupling is installed between two pipes to be welded.

For sleeve welding of pipes with a cross-section of up to 4 cm, it is allowed to use a manual unit. It is equipped with nozzles (elements for heating), which are made in the form of a mandrel (it is necessary for melting the inner part of the bell) and a sleeve (melting the outer part).

Heating elements are usually coated with Teflon. This non-stick composition perfectly protects the nozzles from failure during operation. The hot attachments should be cleaned after each individual welding operation.For this, scrapers made of wood or coarse rags (for example, tarpaulin) are used. Once the nozzles have completely cooled, it is impossible to remove the layer of molten polypropylene from them. You will simply ruin the expensive Teflon layer.

Let's see how it is necessary to connect the pipe products in question using a welding machine. The scheme of work (it is approximately the same for butt welding and for the procedure using couplings) is as follows:

On welding device mount the required size nozzles and place the device on a flat surface.
Set the welder to the temperature required for welding polypropylene products (it is 260 °C) and wait about a quarter of an hour (during this time the nozzles heat up to the specified level).
Using a pipe cutter or scissors, cut the polypropylene product at a right angle, clean the pipes from dirt and dust, and remove grease stains from them ( soapy water or regular alcohol).
Place a mark on the pipe (it shows the depth of the socket; in addition, you need to add another 2 mm to this value).
Insert the pipe into a smooth sleeve (focusing on the mark you made earlier), and pull the socket onto the mandrel.
You wait until the structure warms up (the heating time is indicated in the instructions for the welding machine), remove the heated elements from the welder and connect them (it is very important to ensure the alignment of the coupling and the pipe product).
Wait for the structure to cool down. During this period, it is prohibited to deform (bend, turn) the pipes.

Welding machine for connecting pipe products

The operation is completed. You have received a reliable and durable welded joint. If there is a need to arrange wiring from the main pipeline, you need to use special welded saddles. Mount them like this:

For 30 seconds, use the welding unit to heat the surface (outer) of the main pipe and the saddle for welding (the operations are performed simultaneously).
Press (without turning) the saddle against the pipe and maintain the load for about half a minute.
Leave the connection for 10 minutes.

Then you drill twist drill the wall of the polypropylene pipe and the bottom of the saddle to bring the required branch. It is advisable to use on at this stage a special washer (called a setting washer) to accurately maintain the drilling depth.

The above methods of joining polypropylene products require the use of welding machines and heating plates. Not every House master has similar devices. But there is no point in buying a welder and attachments for it for the installation of one pipeline.

In such situations, it is possible to make detachable pipe connections without welding. The operation is performed using two methods: compression-type fittings or cold welding composition. The second technology is suitable exclusively for those through which cold water. Cold welding is applied to the products to be joined, pressing them firmly against each other for 5–10 seconds. You can give the connection additional tightness by coating the joint with silicone sealant or by wrapping it with Teflon tape.

Detachable pipe connection without welding

If you decide to create a polypropylene pipeline by connecting its elements with fittings, you will need a crimp wrench. It is easy to purchase at any hardware store. But most often such a key is included in the fitting kit. You don't even have to buy it separately. To perform work using this method, you will need the following details:

crosses, tees;
Ball Valves;
couplings;
adapters;
saddles for branches;
plugs;
squares with nuts (cap nuts).

Working with fittings is simple - install the required element and crimp it using a wrench. But at the same time, be prepared for the fact that the work on connecting the pipes will take you a very long time. long time. It is necessary to carefully compress each structural element, check the quality of the resulting connection, and additionally seal it. It is for this reason that systems made from polypropylene products are usually assembled by welding.

True, in some cases it is impossible to do without fittings. For example, if you need to connect metal and polypropylene products. In such situations, special fittings will be required - transitional ones. On one side they have a thread for entry steel pipe, on the other - a solder coupling (a product made of propylene is placed in it).

You can also assemble metal and polypropylene pipes using: a fitting with a special union-type nut; couplings and American ones (in this case a union nut is also used). Choose the connection method that suits you!

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.

Life time plastic pipeline With cold water is 50 years, such an impressive figure forces the replacement of outdated lines with this type of highway. The tightness of joints is the 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

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 temperatures up to 80ºC, therefore 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.

A distinctive characteristic of connecting 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

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 a high temperature 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.

If you have to work with reinforced pipes, the algorithm of actions changes. Must be cleaned before soldering upper layer pipes 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.

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.

Failure to comply with the recommended heating time leads to the formation of leaks - in case of insufficient heating or sealing of the internal space - in case of 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.

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

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 parts: angles designed for joining various diameters, tee, soldered and combined couplings, having external and internal thread, plugs, adapters with external thread, elbows and tees with union nuts, ball valves, various fittings with factory threads.

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. Cutting off the right part pipe, insert it firmly into the fitting, wrap the thread of the element with thread to seal and tighten the ferrule and nut, completely tightening with a wrench. This connection method takes much longer than welding, but it is convenient for connecting polypropylene pipes to radiators.

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.

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 are leaking, they must be tightened.

Self-installation of 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.

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.
Otherwise it applies flange connection. A rubber seal is installed between the flanges. The flanges are bolted together.

To independently install a water supply system from plastic pipes, you do not 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 become familiar with the technology and some of the nuances of connecting pipe elements of this type. It is also important to learn a few lessons that describe how to connect different types of 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:

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: “How to connect polypropylene pipes - a review of proven joining methods”). 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 of a water supply system made of polypropylene pipes is carried out 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: “Types of welding PVC pipes, advantages and disadvantages of methods”).
While the soldering iron is heating, the reinforcing layer is stripped in the place where the fitting will be welded.
Dust and dirt are cleaned from the surface of the elements to be joined and wet areas are wiped well. 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 start working on your own.

Joining of metal-plastic pipes

Compound metal-plastic pipes You can also make these products yourself using one of three methods:

Connection 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 overtightened, as this leads to damage to the rubber seals (read also: “What and how to connect PVC pipes– optimal connection methods”).

All water supply elements are connected in a similar way. This type of installation has one advantage: minimum set tools for work, which are at hand for any owner. In addition, this is the only option that allows you to get a detachable connection, which is necessary in some situations.

Compression fittings for water pipes

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, simply insert the prepared end of the pipe into connecting piece, and all actions are performed without much effort.

When water is supplied to assembled system the fitting wedge is pushed out and clamped, thereby preventing water leakage. This method does not require any special tools or keys, and the installation itself is several times faster. Read also: “How to install plastic pipes - basic installation rules.”

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.

Connection of polyethylene pipes

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

Using compression fittings.
Welding using an electric coupling.

The connection with compression fittings is carried out by analogy with 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 the top layer of pipe 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.

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

How to connect PVC pipes

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 you cannot leave the glue 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.

Connecting plastic water pipes: how to connect by soldering, without soldering and a soldering iron, options

Connecting plastic pipes without using a soldering machine

When installing communication systems, it is necessary to connect individual elements, however, this process can be performed in completely different ways. The connection of plastic pipes without soldering deserves special attention, because in this case it is possible to do without the use of a special apparatus, the price of which is quite high.

The photo shows plastic products for communication systems.

Docking using fittings

With this option, a set of shaped parts is used that makes it possible to combine not only two, but also more elements. Every developer who does not have a soldering machine at his disposal wants to learn how to connect plastic pipes in this way.

Advantages of the method

The low cost of fittings allows you to reduce the cost of connecting communications.
The ease of installation makes it possible for even non-professionals to do the docking.
The ability to use parts in pressurized systems expands the scope of application.

This is what the connection fittings look like.

Note! It must be taken into account that this method applicable for elements with a small diameter, and in other situations it is thermally affected joining that is most often used.

Carrying out work

It's time to understand how plastic pipes are connected directly with compression fittings. Tools you will need: sharp knife for cutting elements, a calibrator, as well as manual or automatic pliers for the clamping operation.

First of all, cutting is done components communication system, if required in specific case. The cut must be made strictly perpendicular to avoid bevels and other flaws. After this, using a calibrator, the ovality at the joint is eliminated.

Next, a special coupling is put on, and the fitting itself with O-rings is inserted inside the pipe. The top is crimped using prepared pliers. Thus, it is possible to dock plastic elements.

A clear example of installing a compression fitting.

However, in some cases you need to know how to connect a plastic pipe to a cast iron pipe. For this, a special adapter is used, the diameter of the sides of which corresponds to the size of the pipes used. During the joining process, it is necessary to remember that the linear expansion coefficients of plastic and cast iron are noticeably different.

Gluing individual elements

In addition to the above option, there are other ways to connect plastic pipes. One of these is the gluing process, when the ends of the component parts are joined using a special chemical composition. During the work, it is possible to ensure sufficient tightness.

The principle of operation of the composition

Adhesive intended for plastic products, usually contains polyvinyl chloride, soluble in methyl ethyl ketone, tetrahydrofuran and cyclohesanone. Special additives are also added to two-component formulations to improve adhesion.

Widely used composition.

Advantages of the glue method

High-quality grip chemical agent with the surfaces of the elements allows for high tightness.
Availability basic material makes it possible to use it for a wide range of consumers.
Invisibility of the joint has a positive effect on the aesthetic perception of the components of the communication system.

Attention! The adhesive used must be stored at a sufficient distance from open flame, as it catches fire easily. In addition, during work it is necessary to protect the skin from contact with the substance.

Application of the composition

You can do the gluing yourself. Work must be carried out at temperatures from +5 to +35 degrees. You need to prepare a brush with natural bristles in advance. In most cases, it comes directly with the adhesive.

Before starting the main steps, it is advisable to assemble the structure without using chemicals in order to perform preliminary fitting. Before applying the substance, the surface must be degreased using solvents.

The process of applying glue is demonstrated.

Apply to prepared surfaces thin layer glue. The plastic product is inserted into the hole until it stops, and rotation or other manipulations should be avoided. The components are held for 15-20 seconds so that the adhesive has time to dry.

Fitting into the socket

The presented method is applicable mainly to sewer systems, since pressure is not created in them. At the ends of the elements used there are special connections for plastic pipes - sockets. With their help, the fixation itself is carried out.

Positive aspects of technology

Relatively high speed assembly guarantees installation in the shortest possible time.
Without the need to purchase additional components, costs can be reduced.
Possibility of implementation self-assembly allows you to refuse professional help.

Connection principle: 1 – socket, 2 – seal.

Important! For gravity systems This option can be considered quite airtight, because during installation a rubber gasket is inserted inside, which at the same time makes it possible to compensate for the mismatch of the parts being connected.

Description of the assembly process

After making sure before installation that there is a rubber ring in the socket, you need to clean it of various contaminants, then you will be able to achieve good adhesion. Lubricant must be applied to the smooth edge of the pipe to improve sealing. After this, docking takes place.

To do this, the smooth end of the element is inserted into the socket until it stops. The place of contact with the edge is marked with a marker to make it easier to determine the joining distance. Next, the product is pulled back approximately 10 mm directly from the line.

The gap made is needed to compensate for linear expansion, which usually occurs during temperature fluctuations. In this regard, it will be possible to avoid the occurrence internal stresses in a communication network.

Key points for socket connections.

System components are cut strictly perpendicular to eliminate the possibility of bending the pipeline. After cutting, the end is chamfered using a regular file. This reduces the likelihood of damage to the sealing gasket.

Final part

After considering this topic, almost every beginner should efficiently connect plastic pipes without outside help. Additionally included visual instructions which will help you understand difficult moments related to installation work.

Connecting plastic pipes without soldering: video instructions for do-it-yourself installation, how to connect with cast iron, methods, photos and price

How to connect polypropylene pipes without a soldering iron?

It is necessary to slightly alter the water supply system in a new building, add a piece of pipe - lengthen it. I have all the materials except the soldering iron, is it possible to make a high-quality connection, for example, using glue? Or can such pipes be connected only with a soldering iron?

For high-quality bonding, it is advisable to solder polypropylene pipes only with a special soldering iron. But if it is not there, not everyone has it, then the pipes are connected to each other with other materials and tools, for example, gas burner. This method is suitable for soldering large diameter pipes. Measure and cut the required length of pipe, be sure to add

2-2.5 centimeters. Heat the pipe and fitting simultaneously with a burner. Combine them and hold for a while until they cool down.

Polypropylene is a difficult material to glue, and to connect polypropylene pipes you need to choose a very high-quality adhesive designed for this material.

Prepare a piece of pipe and fitting for it. To reliably glue polypropylene pipes, it is necessary to clean and degrease the surfaces. Then apply a thin, even layer of glue to the pipes and connect the parts with a fitting, wait according to the instructions for at least 2-3 minutes. Do not use the pipes for several hours until they have completely set.

Pipes intended for a soldering iron with high quality (I would like to emphasize the word “high quality”) cannot be glued together.

In general, it can be glued together.

You need to buy this glue

In terms of money, this will turn out to be many times more expensive than renting a soldering iron, or paying a craftsman to extend the pipe you are writing about (the craftsman will come with his own soldering iron).

We clean the pipe with a shaver (practice somewhere on a piece of pipe, set the shaver knife to remove a small layer).

We have to clean the pipe, because the diameter of the pipe is larger than the diameter of the fittings (given the total diameter of both the pipe and fittings).

After we have cleaned it, we polish it with fine sandpaper.

We try to insert the pipe into the fitting; the fit should be tight.

Now we remove the dust, degrease, and dry.

We insert the pipe into the fitting and hold it for some time (30 seconds).

Remove excess glue immediately.

In the end I would like to give some advice:

After we have incorrectly connected the pipes under heating with a soldering iron, glue, be sure to attach them above the eye front door sticker with the inscription “turn off the main valves.”

And block it every time you leave the house.

How to connect polypropylene pipes without a soldering iron?

For high-quality bonding, it is advisable to solder polypropylene pipes only with a special soldering iron. But if it doesn’t exist, not everyone has it, then the pipes are connected to each other with other materials and...

Connecting plastic pipes without soldering. Fittings and cold welding

Polymer parts can be connected not only using heating elements. But how to connect polypropylene pipes without soldering? Soldering polypropylene pipes to connect them is not always used. The presence of other types of connections besides soldering is one of their characteristic features. The absence of the need to purchase welding equipment in one way or another makes this type of welding even more popular and accessible, since few people know how to solder or how to weld pipes. Also distinctive feature is the possibility of connecting plastic pipes with your own hands without special equipment. How to connect plastic pipes without soldering?

There are two ways to connect polypropylene, polyethylene and other polymer materials without the use of special welding equipment: welding plastic pipes using compression fittings and cold welding.

The only thing you will need besides compression fittings for the first type of welding is a special crimp wrench. They are usually sold together. For cold welding you only need special glue. The last type of connection without soldering is most often applicable only for cold water supply. The disadvantage of joining parts without soldering is that it takes more time. Next, each type will be examined in more detail and the answers to the questions of how to connect polypropylene pipes without soldering and how to solder polypropylene pipes on your own will be presented.

Connection using compression fittings

Solder plastic parts possible using compression fittings. They are applicable not only to the corresponding type of pipe. As a rule, fittings made of a material different from the material of the elements being connected cannot be used. However, the peculiarity of such fittings is their versatility, since different pipes can be connected: aluminum with copper, low-density polyethylene with PVC, and so on. Therefore, not every part corresponds to a certain type of fitting. Another advantage of this type of connection is that the structure can be either assembled or disassembled. If you have soldered two parts, it will no longer be possible to separate them as before.

The fitting design consists of the following elements: those that are installed at the end of the pipe (for example, plugs) and those that combine the connected elements into a single whole.

The modern market has many fittings. Here are the main ones:

The compression fitting is a housing that is not affected by ultraviolet radiation. This housing contains a press-fit sleeve and a cover. The body material contains an O-ring, which facilitates a tight seal, a clamping ring, and a thrust ring (sometimes these two rings are combined into one). In case of disassembly/assembly of parts, the sealing ring must be replaced with a new one. These fittings are used for products made of low-density polyethylene (PE 100, PE 80, PE 40), and low-density polyethylene. Compression fittings in addition to UV resistance, they are also characterized by resistance to chemicals aggressive influence. The scope of application of connections using compression fittings is typical for low-rise buildings, in the street water supply systems villages and towns, greenhouses. In this regard, it is worth noting again the peculiarity of this type of connection, namely the possibility of disassembling the pipeline in one place in order to move it to a new location.

When working with fittings, be sure to first read the instructions and strictly follow its provisions, as well as the rules set forth below. Before work, you need to familiarize yourself with the quality of the pipes, their sizes and their compliance with the fittings. There are maximum permissible limits for deviations from the norm when connecting: the diameter cannot deviate from the nominal value by more than 1%, and the oval section cannot be more than 2%. If these limits are violated, then it is better to lay the pipeline in a horizontal position. The pipeline is connected manually if the diameter is less than 50 mm, if more, then it is necessary special key. Connecting plastic pipes without soldering must be carried out in compliance with the requirements for thorough cleaning of parts from dirt and burrs, and cleaning so that the edges are smooth and free of defects. For pruning, special scissors are used. Mark the required insert length on the product using a marker.

The connection speed is quite fast. The nut is placed on one end of the pipe, the clamp ring is installed, after which the pipe is inserted into the fitting. The ring should reach the stop. Finally, depending on the diameter of the pipeline, tighten the nut manually or using a key.

As a result, we get a ready-made connection of plastic pipes without soldering.

The main advantages of compression fittings:

Structural strength
Durability of the design
Simplicity and speed of assembly
No susceptibility to corrosion
Versatility
The ability to connect plastic pipes with your own hands without welding equipment

How to solder polypropylene pipes without a soldering iron using cold welding or adhesive bonding

Cold welding of plastic pipes is the process of joining parts without heating them. You can solder plastic elements by using special glue, which hardens quickly. The adhesive composition usually consists of epoxy resin and hardener. Cold welding has black or white colors. It is usually used for cold water supply. But some glues are also used for hot glue. This must be indicated separately on the packaging.

What kind of adhesive mass is there:

Fluid mixtures (the package should contain two tubes: one with a hardener, the second with an elastic substance; for example: if you are going to repair a hole in a polymer product, then the contents of the tubes must be combined immediately before starting work (a kind of repair); you must definitely use a mixture for no more than 20 minutes, otherwise it will become hard).
Plastic mass (represents a bar consisting of two layers: a hardener on top, and a plastic component inside; resembles plasticine).

Most professionals advise using the cold welding method for a specific list of materials, which is provided in the instructions.

The packaging also indicates the maximum permissible value temperature for a specific mixture (usually about 260 degrees). If you strictly follow the operating rules, the seam will be durable, strong and airtight. There is glue for high temperatures water (about 1300 degrees).

Thus, soldering polypropylene pipes is not the only way to connect polymers. It is possible to connect plastic pipes with your own hands without using a welding machine. Do-it-yourself polypropylene pipes can be connected by cold welding or using compression fittings. Connecting polypropylene pipes without a soldering iron using fittings has features, among which the most important is the ability to assemble and disassemble structures.

How to connect plastic pipes without soldering: fittings and cold welding

How to connect a pipe using compression fittings; how to connect plastic pipes using cold welding, without soldering.

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 them especially the increased efficiency of installation of drainage and water supply systems, and the reduction of the possibility of leaks that can occur during butt welding or during a chemical connection. 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 the cost of 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. On this process 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 much more short 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, the container with the adhesive composition must be closed 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 at the next stage the end of the product is chamfered, 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 elements being connected, 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 circumference. You may have 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 negative sides other technologies. If we are talking about adhesive connection which was described above, it is worth highlighting the advantages that it is possible to implement high-quality installation pipes even in places where access is particularly difficult. The technician will not have to use additional expensive equipment that can consume a large amount of electricity during operation. The whole process can be carried out independently, without resorting to help. 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, inner surface the product will not form sagging, which can narrow the lumen 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.