Soldering polypropylene pipes without a soldering iron. How to solder polypropylene pipes without a soldering iron How to connect plumbing pipes without soldering

In apartments and private houses you can often see plastic pipes. Demand similar products V last decade justified by their low price, long operational period and the fundamental impossibility of rusting.

You can connect plastic pipes to each other not only with a soldering iron, but also alternative methods- using flanges, fittings, couplings or by gluing.

Connecting plastic pipes without soldering will not require large financial expenses. And you won’t have to get expensive soldering equipment from somewhere (obviously, not everyone has it) either.

It is worth admitting that the soldering process itself seems very complicated to some. A person must be able to properly handle a soldering machine, set the required pressure and temperature, and select solder. In general, in order to solder pipes efficiently, you really need to know a lot of nuances.

There is also an option such as soldering polypropylene pipes without a soldering iron. To do this, simply take solder paste (this is already sold in finished form a mixture of flux, solder powder and lubricant) is applied to the joint and heated. Moreover, instead of a soldering iron, it is proposed to use a gas burner or lighter. But this method may also cause rejection for some, since here you have to deal with open fire.

Imagine a force majeure situation: a breakthrough occurred plastic water pipe. It can take a long time to restore its seal by soldering. And restoring the tightness of pipes connected without soldering can be carried out much faster - this is a really important advantage.

Connection with fittings

To connect plastic pipes without soldering, press fittings (also known as compression fittings) or new Belgian push fittings, which are actually fixed by themselves, are very often used.

Standard press fittings are usually made from steel alloy or cast iron. And they are best used for polypropylene or other plastic pipes of small diameter. The advantage of these plumbing products is that they can be used to build transitions between pipeline elements and connect them at different angles.

Most often, fittings are installed on bends and branches of a plastic pipeline. An ordinary press fitting consists of a main body, a cover, a sleeve and two rings: a clamping ring (it is located in a special socket) and a seam ring (it is used to fix the plastic pipe).

If we are talking about fittings with a diameter of less than fifty millimeters, then they can be installed manually, without additional accessories and equipment. One more thing important rule. The plastic pipe must first be prepared before installing the fitting - cut, remove burrs, clean from dust and degrease. Such preparation must be carried out in any case, regardless of the chosen connection method.

After plastic product will be brought into an acceptable condition, you need to install a nut on it, previously removed from the fitting. Next, a clamping ring is put on this nut. Now you can insert the pipe into the fitting as far as it will go and secure it. The same actions must be done with the second pipe being connected.

Using flanges

You can connect plastic pipes with flanges without soldering. This joint is considered very reliable - metal flanges can withstand enormous positive temperatures and high pressure.

Today, even large-diameter pipelines are equipped with flanges. They provide a really strong connection.

Flanges for assembling household plastic pipelines are always threaded on one side only. As a rule, they are designed for a pressure of 1.6 MPa. At the same time, in stores you can find flange options with different sections- from 20 to 1200 mm.

The connection algorithm using flanges is quite simple. First of all, you need to carefully pull the flange onto the pipe and put on the rubber sealing gasket. The gasket should extend beyond the edge of the plastic pipe no more than one centimeter. Then the flange is carefully pushed onto this gasket.

On next stage The connection is made with the exact same flange of another plastic pipe. And the bolts here should be tightened very carefully. If you try too hard, plastic surface may crack.

Using couplings

An ordinary coupling for plastic pipelines is a fairly simple part in its design. It consists of:

cast iron body;
two nuts;
rubber gaskets;
four metal washers.

The coupling can be found at the nearest plumbing store, or, if you have certain skills and knowledge, you can make it yourself. In this case, the characteristics of the coupling must strictly correspond to the dimensions of the products being connected. Ordinary couplings are suitable for both pressure plastic pipelines and pipelines without pressure. With their help they provide reliable connection polypropylene without the use of a soldering iron.

To form a connection, the ends of the pipes must be inserted into the coupling so that they touch in the middle. The ends must pass through washers, gaskets and nuts. Then you need to tighten the nuts tightly so that the pressure on the gaskets is strong enough.

Joining plastic pipes with a coupling provides a 100% sealed seam, even without the use of soldering. But in certain cases, for example, if the pipe is short or adjacent directly to the floor (or other horizontal surface), it is not possible to install an ordinary coupling.

For such complex cases a clamping coupling was invented. How to use it? First you need to clean the edge of the plastic pipe. Then you need to unscrew the coupling and put it on the plastic product in correct sequence all fastening parts. Moreover, the sealing ring should ultimately be located at a distance of at least one centimeter from the edge of the product.

Then you need to insert the body of the clamping coupling into the end of the plastic pipe. And then you need to move all the existing rings to this body and tighten the bolt. And to the thread located on the other side of the coupling, it will be necessary to attach an “American” fitting with a plastic pipe connected to it.

To control the strength of the connection, you must carefully pull the coupling towards you, holding it free hand the pipe to which it is attached. The coupling must remain stationary. If it moves, it means that the wrong size part was selected. That is why it adheres so poorly to the pipeline. However, this is easy to fix - you just need to tighten the threads tighter.

Gluing method

Plastic pipes can also be glued, although many plumbers consider this method extremely unreliable. And therefore, in practice, glue for connecting pipes is used only in combination with fittings.

Before applying the glue, the pipe is cut and any burrs on it are removed. You also need to remove dust from it and thoroughly degrease those areas where glue is supposed to be applied (that is, you will have to buy special remedy for degreasing). Then you need to insert the pipe into the fitting to check how well they fit together.

Now you can thin layer apply glue to the place of future contact. Immediately after this, the pipe is inserted into the fitting all the way and held in this position for about two minutes so that the glue sets. And the glue residues that appeared on outer surface, are removed with a cloth.

The glue will dry in about 15-20 minutes. However, you only need to let water (or anything else) through the pipeline no earlier than after 24 hours.

Some types of plastic (for example, polypropylene) are very difficult to glue. In order for polypropylene parts to fit together well, you will have to purchase high-quality glue specifically designed for this material.

We can conclude that there are plenty of ways to connect plastic pipes without soldering. The most reliable of them is the coupling method, and gluing helps only in emergency situation, and must be used with caution.

The issue of soldering polypropylene pipes today is acute for every owner of his apartment. After all, everyone, without exception, wants high-quality fastening of pipes, since this directly depends on:

service life of the plumbing or heating system,
the need for repair costs.

Therefore, many are interested in how to properly solder pipes in order to avoid troubles in the future.

To solder polypropylene pipes, of course, you need a special soldering iron. But what to do if there is no such tool in the house? The answer is simple: use available materials and tools. For example, a gas burner.

Undoubtedly, every home should have a gas burner. But if it is not there, when choosing this tool you should take into account its main parameters:

gas used;
cylinder connection.

This soldering method is suitable not only for small diameter pipes, but also for soldering large diameter pipes.

With help gas burner You can independently repair or install the heating system in a short period of time.

Soldering requires:

accuracy,
attentiveness,
commitment to quality,
preparation for the main work.

Polypropylene pipe: soldering instructions

Let's consider step by step how to efficiently solder pipes:

Step 1. Select pipes of suitable diameter. Please note: newly purchased pipes must match the old ones in diameter. This will help avoid connection problems.

Step 2. Having measured, cut off the required section of pipe. Do not forget to add an additional 25 millimeters, which will subsequently remain fused into the fitting.

Step 3. Heat the pipe and fitting using a burner. This must be done simultaneously.

Step 4. After this, the parts need to be connected and held for a while, waiting for them to cool.

Please note: Before installing pipes, it is necessary to draw up detailed diagram, along which they will connect. It is necessary to mark the installation locations of rotary angles, tees and taps.

It is recommended to purchase connecting parts and pipes from predominantly one manufacturer. This is an important point, since each manufacturer has its own technology for manufacturing these elements. This means that the melting temperature of the parts may vary, which is not suitable for a monolithic structure.
Before the main work, the parts must be cleaned and degreased, which will avoid compromising the quality of the connection.
Practice first on sections of pipe so that you know what effort is required to obtain the expected result. Please note: the pipe inserted into the fitting must not be rotated under any circumstances, this will compromise the strength of the connection, since the surfaces of the parts will gather in waves.
If you choose quality, don't skimp! Good products will last longer, which will save you money in the future.
If the room temperature is below +5°C, there is no need to take risks and start work, because its effectiveness is significantly reduced. Connections in in this case will be fragile, and the connecting parts will require additional heating. And this is fraught with unnecessary melting and deformation of elements.

Soldering wires: how to solder if you don’t have a soldering iron?

Surely many have encountered the need to connect two wires, but do not have a soldering iron at hand. All that remains is to rely on the ingenuity of contemporaries, who offer easy soldering methods that everyone can master.

On modern market The following materials are suggested:

Soldering tape.

Soldering without a soldering iron using paste

Solder paste is a mechanical mixture of flux, solder powder and lubricant, that is, a binder.

Manufacturers of solder pastes practice making them based on silver, which makes it possible to use this mixture for soldering different types nickel, steel, and copper alloys.

Requirements for pastes

Solder paste should:

exfoliate very quickly, but do not oxidize;
be viscous (which is very important!) and maintain deformation;
have adhesive properties;
washable in ordinary solvents;
do not flow beyond the boundaries of the applied layer;
do not leave indelible residues after application;
do not influence technical properties fees.

Soldering steps

Step 1. The primary task is to prepare the wires. We clean the surface of the wire by using stationery knife or wire cutters.

Step 2. Twist the wires.

Step 3. Carefully coat the soldering area with soldering paste. Apply drops of paste evenly over the entire surface of the wire.

Step 4. Warm up the application area. You can use a regular lighter for this. After heating, the paste will form a strong adhesion.

Step 5. Put it on the wire heat shrink tube, which we also treat with flame so that it is evenly distributed over the surface of the wire.

Please note: This soldering method is primarily suitable for fastening small-diameter wires, such as headphone wires.
Soldering using soldering tape
Soldering tape is a material used for installation electrical wiring, its repair or replacement, in household and field conditions, as well as in the automotive industry.

Let's consider the soldering process using soldering tape step by step:

Step 1. The insulation must be removed from the wire, that is, stripped with wire cutters.

Step 2. Twist the wires, and then wrap the twist with solder tape. After removal protective film Apply the side with flux to the surface of the wire and crimp it.

Step 3. Heat the winding area with a match or lighter until the solder completely spreads over the surface of the wiring.

Step 4. Wait for it to cool, then remove excess flux.

As you can see, you don’t have to rush out and buy a soldering iron to solder wires; you can use the methods described above. This will save both time and money.

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 a special welding machine, which experts call “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 required temperature, 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. The connection of polypropylene pipes without soldering has 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 solder correctly 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 service life, ease of installation and lack 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 expenses. 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 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. During selection 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 are able to 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.

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 plugging into the network and installation desired temperature heating, 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. 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.

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. Even a small amount of moisture deforms the material when heated. Chemical composition pipes from different manufacturers may not match, this will lead to a leaky joint. 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 systems need to be carried out trial run 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.

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 special tool, the nature of the materials being connected, the purpose of 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.

When creating modern utility networks Craftsmen are forced to solve the problem of how to connect plastic pipes for water supply. Connection technologies vary depending on the specific system type and other operating conditions.

Plastic has practically replaced cast iron and steel in the construction of communications. Polymer pipes do not require connection expensive equipment or specific qualifications of the master.

Connection of plastic water pipes with your own hands can be done using different technologies. Their choice depends on the purpose of the system, the type of polymer used and the dimensions of the pipe. The main types of connection are:

In general, it is possible to connect plastic pipes both without welding and with it, that is, installation can be carried out “hot” (welding) or “cold” method.

The most rational way to install a water supply system is. What are its advantages and features - read in a separate article.

How to organize water supply in a private house from a well is described.

Non-welding connection for various types of plastic pipes

Connecting plastic pipes without soldering can be done in various ways. The choice of specific technology depends on the type of polymer water supply:

1. Polyethylene pipes HDPE connected using . No specific equipment is required for installation; muscular effort or, in extreme cases, a crimp wrench is sufficient. This DIY installation of plastic pipes will be simple, but it will require certain time, since each joint will need to be carefully crimped. In addition, this method is still less reliable compared to soldering.

Features of connecting plastic and metal pipes

Connecting plastic pipes with metal pipes is necessary in cases when repairing an old sewer or water supply system where steel or cast iron elements are present.

If plastic and cast iron pipes are joined in sewer system, then the installation of the joint is very simple, using special adapters, which are available in various sizes. But the methods that are traditionally used for joining cast iron pipes are not suitable in the case of plastic. In particular, due to embossing, the plastic pipe is deformed, and there will be no question of the reliability of the connection. The junction between polymer and cast iron pipe It is also inadvisable to seal it with cement - after all, plastic and cast iron expand differently due to heating - it will only be enough to fill the pipes with hot water a few times for the connection to lose its tightness and become unusable.

How to connect plastic water supply pipes with metal ones? Greater reliability will be required here, since plumbing system pressure is higher. In particular, if the water supply is created from pipes up to 4 cm in diameter, then the joint is created using an appropriate fitting. It will have a thread on the metal side, and a standard coupling on the plastic side.

Important: Do not forget to carefully seal the connection on the side metal pipe— traditional materials and technologies are suitable for this, for example, flax fibers impregnated with drying oil.

If we are talking about installing a pipeline with a diameter exceeding 40 mm, then it is advisable to use a flange connection to connect metal and plastic parts. This greatly simplifies the installation process, especially since it will not be difficult to select the appropriate adapters.

And when pipelines are assembled from different materials, where the environment will be under high pressure, then it is worth using a metal hose. To attach such a part to a plastic part, you will need an appropriate fitting, and it is attached to metal with a threaded connection.

In this way, you can create the most reliable joint and switch from old metal structures to more practical and durable plastic ones. These methods are applicable for both heating and plumbing systems.

Do-it-yourself installation of plastic pipes: video

In this video section you can see how plastic pipes are connected without soldering into a socket.