Soldering polypropylene pipes without a soldering iron. Soldering polypropylene pipes: rules of work and analysis of possible errors Soldering polypropylene pipes without a soldering iron

Poly propylene pipes have long gained great popularity among consumers. Unlike metal options polypropylene pipes are much lighter in weight, and methods for connecting this type of communications do not require skills in working with a welding machine and metal-cutting tools, as is the case with iron pipes.

Peculiarities

As with any other type of plumbing, installation of polypropylene pipes has a number of features.

When butt welding, the walls should not be thicker than 4 mm. The joining surfaces must be trimmed, and strict parallelism of the connected elements must be maintained. When docking, it is recommended to use special guides.
Since threading cannot be done on a polypropylene pipe, they are used for threaded connections. threaded fittings, and to ensure the tightness of the connection, a sealant and Teflon tape are used.
When welding polypropylene pipes, it is necessary to ventilate the room. When the temperature in the room is below freezing, this type of work cannot be carried out, since joining when the elements are insufficiently heated does not guarantee the tightness of the connection.

At welding work with polypropylene pipes, you need to heat the soldering iron to the desired temperature and place it on the stand. When working, you should follow safety precautions, as we're talking about about a high temperature of 260 C.

To ensure a high-quality connection of elements, it is necessary to maintain the melting time required for a certain pipe diameter.

Below are the diameters and time intervals.

16 mm – 5 sec;
20 mm – 6 sec;
25 mm – 7 sec;
32 mm – 8 sec;
40 mm – 12 sec;
50 mm – 24 sec;
63 mm – 40 sec.

What is necessary?

To install polypropylene pipes, you will need special tools for cutting and connecting elements.

The list of tools includes devices such as:

pipe cutter;
welding machine;
stripping;
glue gun;
marker for marking;
connecting part and tape measure.

Pipe cutter for polypropylene pipes, it is better to use a professional one - such a tool guarantees reliability and a perfectly even cut, it will not allow the formation of burrs on the cut surface. When choosing a pipe cutter, it is worth considering such an important parameter as the minimum and maximum pipe diameter. You should choose a tool with a blade made of alloy steel only.

Welding machine manual type must have a thermostat and a heating plate with holes for installing nozzles. The welding machine requires a pair of Teflon-coated nozzles. It should be selected from famous brands that have proven themselves in the market, since tools from dubious manufacturers may fail during operation, which will stop all work.

Stripping can be done manually or in the form of an attachment to a drill.

To strip the outer layer, couplings with internal knives (shavers) are used. Select the required coupling for the diameter of the pipe being cleaned. They also use double-sided couplings that allow you to work with different diameters. To strip the inner layer of the pipe, use a trimmer with knives located inside. The pipe is inserted into the tool and rotated several times.
Grinding tools in the form of drill attachments differ from manual versions only in the presence of a rod that is inserted into the tool chuck.

Glue gun can be used as alternative option other types of connections. This tool has two advantages: glued seams are almost as reliable as welded and other joints, and the glue sets quickly. Such connectors perfectly fasten shaped parts and other elements.

Methods

There are several ways to connect polypropylene communications. Choosing which method to use depends on the type of PP pipes and their purpose.

Cold welding is based on gluing elements with a special adhesive composition. It is applied to the parts that need to be connected. First, the surfaces to be bonded must be degreased. After applying the glue, wait a while and connect the pipe to the desired element. After a short period of time (approximately 20 minutes), the connection will stabilize and be reliable.

Connection using steel or cast iron fittings. This method is suitable for pipelines with a small diameter. Typically, fittings are installed on bends and branches of communications. The fitting includes elements such as a cover, a sleeve and a clamping ring, which is located in the socket of the product. The pipe is fixed using the seam ring included in the fitting design.

When connecting fittings, you must observe step by step plan actions:

the pipe cut must be made at a right angle;
it is necessary to remove all burrs on the surface to be joined;
then you need to install the nut from the fitting onto the pipe and put the clamping ring on it;
After this, you need to insert the pipe into the fitting and secure the connection with a clamping ring and nut.

Connection using flanges is considered very reliable and can withstand high temperatures and high blood pressure. This method is used when it is necessary to connect polypropylene pipes without resorting to welding. For connection, bolts are used that are screwed into the flange thread.

When connecting with flanges, the following installation rules must be observed:

at the pipe connection it is necessary to make a cut, avoiding the appearance of burrs;
the gasket that is installed on the cut must have a protrusion of 15 cm;
a gasket is placed on the flange and connected to another flange installed on another pipe to be connected;
The gaskets must be installed in such a way that their cross-section does not touch the bolts;
More than one gasket cannot be installed on a flange, as this will reduce the tightness.

Connection using couplings. To connect with couplings, you need to make a thread on the pipes for their subsequent installation and, to make the connection tight, wrap a little tow around it. The edges to be joined should be cut evenly and the location of the coupling should be marked with a marker. Then you need to apply lubricant to the coupling and install it on the pipe in the previously marked place.

Welding refers to the hot joining method. This type of connection is one of the most reliable, and its essence lies in the melting of polypropylene with a special apparatus under the influence of a temperature of 260 C. The elements heated to the required temperature are pressed tightly against each other, and after they cool, a reliable connection is formed. The time after joining until the final polymerization of polypropylene will take 20 minutes.

Before proceeding with the connection by welding, it is necessary to remove all irregularities and burrs, and if the pipe has a layer of foil, then it must be treated with a trimmer.

When connecting by welding, the following sequence of actions should be observed:

turn on the welding machine and heat it to a temperature of 260 C;
you need to put the device nozzles on the propylene pipes to be connected - this needs to be done very quickly;
when the elements to be welded begin to melt, they are removed from the apparatus;
connect the molten elements to each other by pressing firmly for 15 seconds;
The connected elements must be allowed to polymerize to fully set - this usually takes about 20 seconds.

Common mistakes when connecting by welding:

displacement of elements during welding at the moment of their heating;
when joining elements, they must not be rotated - otherwise the seam will be unreliable;
When welding the valves, the location of the valves was not taken into account, and they cannot move freely.

HDPE or PVC pipe can be connected by soldering. This is especially true for polyethylene construction.

How to connect?

In the case when you need to connect a polypropylene pipe to a metal one, you can use the threaded connection method. To do this, you will need special fittings, one end of which is smooth, and the other has a thread for metal pipe. With this type of connection, the pipe diameter should not be more than 40 mm.

The thread on the fitting can be either external or internal. Smooth surface, located on the reverse side, is needed for welding a plastic pipe. For tightness, linen tow impregnated with drying oil is mainly used.

The tow should be applied to a maximum of two turns and in the direction of the thread.

Sequence of actions for the threaded installation method:

the pipe is cut at a right angle, its end is lubricated with grease, and then a thread is applied using a thread-cutting tool;
remove all shavings from the thread and seal the joint with tow;
a fitting is screwed onto the pipe thread;
the opposite smooth end of the coupling is welded to the polypropylene pipe.

Polypropylene pipes can be connected either by welding or cold. Greater preference is given to the first option, since it is considered the most reliable and durable.

Welded joint

Before welding, polypropylene pipes and fittings for them must be treated with a degreasing solution, and then allowed to dry - only after this procedure can you proceed directly to welding. Similar preparatory work necessary for any type of PP pipes with the exception of those reinforced with foil. For a reinforced pipe, the cut is cleaned using a special cleaning tool (shaver), into which the desired end of the pipe is inserted and turned several times. After cleaning, the upper part of the pipe must be degreased.

You must mark the pipe with a marker, marking the required distance to press it into the fitting. Then the end of the pipe must be placed on the mandrel and the fitting must be inserted into the sleeve of the welding machine. All actions should be done very quickly and clearly. After this, the connected elements are heated for a strictly allotted time.

After the elements to be welded have melted, they must be removed from the nozzles and the pipe quickly pressed into the fitting. The connection requires some force, since the elements to be welded must be pressed tightly and held in this position for some time. You should not clamp the joining elements for more than 20 seconds, as this time is quite enough for them to firmly set. After connecting, be sure to let it cool for a few minutes.

To install your own water supply from plastic pipes, you don’t need a lot of knowledge and experience, since this process is not complicated. However, to improve the quality of the work performed, it is necessary to 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 about how to connect different types plastic pipe and the main points of this process.

Methods for connecting plastic pipes

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

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.
Remove dust and dirt from the surface of the elements to be joined and wipe well wet places. Please remember that failure to follow these steps may result in a weak connection.
The end of one pipe and the connecting element are inserted into the heating nozzle and kept for a certain period of time. The heating time must be strictly controlled, since holding it for a long time leads to deformation of the elements, and insufficient heating reduces the strength of the connection of plastic water pipes. Therefore, each welding machine is accompanied by a special table, which indicates the heating time of parts having a certain diameter.
The heated elements are pulled out of the nozzles and quickly connected. The strength of the connection also depends on the speed of action at this stage, so the process must be performed quickly but carefully. The pipe is inserted into the fitting until it stops, but it should not be deformed. The connected parts should be held until the plastic has completely cooled.
In a similar way, all elements of the water supply system are connected. To avoid damage to the material, you need to perform actions on unnecessary pipe scraps. The process of welding polypropylene pipes is quite complex, but after a few trial steps you can 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:

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

Regardless of the chosen method of connecting metal-plastic pipes, the tools should still be prepared. In particular, you will need a pipe cutter, which can be replaced with a regular one assembly 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. Such installation is characterized by one advantage: a minimal set of tools for work, which any owner has at hand. 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, it is enough to insert the prepared end of the pipe into the connecting piece, and all actions are performed without much effort.

When water is supplied to the assembled system, the fitting wedge is pushed out and clamped, thereby preventing water leakage. This method does not require special tools or wrenches, 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 V 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.

A machine for this type of welding has a very high price, so if it is not intended to be used further, it is better to rent the device for a few days rather than 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 the connection of plastic pipes can be done with your own hands, without having at hand special devices 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 a particular 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. In this way, it is possible to join the 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, which dissolves 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 you to obtain 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 glue used must be stored at a sufficient distance from open flames, as it easily ignites. 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.

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

Fitting into socket

The presented method is mainly applicable for sewer systems, since no pressure is 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 non-pressure 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 from various contaminants, then it will be possible 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 appearance of internal voltages in the 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 be able to efficiently connect plastic pipes without outside help. Additionally, visual instructions are included to 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, wait 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 work on cleaning 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 them 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 ability to connect plastic pipes with your own hands without special equipment. How to connect plastic pipes without soldering?

There are two ways to join 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 that 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. In addition to UV resistance, compression fittings are also characterized by their resistance to chemicals aggressive influence. The scope of application of connections using compression fittings is typical for low-rise buildings, in street water supply systems in 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 a special key is needed. 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 a special glue that 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 temperature value for a particular 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 water temperatures (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.

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, an 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. Inner surface the seams should not lose patency. 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 do it in an 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 gain 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.

One more important advantage This material is that you don’t need to hire anyone for installation; everything can be done with your own hands. 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 the cold method.

Method 1 - soldering

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

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

Video: How to solder pipes with your own hands

Soldering technology

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

Soldering stages

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

Method 2 - without soldering

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

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

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

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

In conclusion, I would like to say that there is nothing complicated in independently connecting polypropylene pipes. As in most other construction work, you will be required to conscientiously and accurately implement all technological standards.

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

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

alina-sharapova.ru

How to connect polypropylene pipes without soldering?

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

Cold connection of polypropylene pipes

General information

During the construction of private houses, polypropylene water pipes began to be installed more and more often. 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 connected in various ways. Many people use the connection of polypropylene pipes without soldering.

Advantages and disadvantages of solderless connections

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

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

However, connecting plastic pipes without soldering has one serious drawback– pipeline installation 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. When choosing the optimal size, the pressure of the pipeline and the material of the products from which it will consist are taken into account.

Flange connection of PP pipes

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

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

When using them, you must follow these recommendations:

At the place where the pipeline elements will be connected, you need to make a 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 with 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 glue must be applied thin layer to the places 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. The popularity of the material and various areas of use are due to 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. 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

Soldering iron for welding

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

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

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

PN 10, 16 – used for laying cold water pipes;
PN 20 - universal pipes with thick walls, they can withstand hot water 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

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

Welding polypropylene

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

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

Soldering process

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

Pipe stripper

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

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

Reinforced pipe

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

Heating temperature and time

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

Try to solder less by weight

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

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

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

Crimp connection method

Connection diagram using a collet fitting

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

For mechanical connection you need to purchase several additional details: angles intended for joining various diameters, tee, 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 long term.

Connection with metal pipe

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

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

How to connect a polyethylene pipe to a polypropylene pipe

To connect such pipes you need to use special fittings. Such a connection is necessary in cases where water was introduced into the house using HDPE pipes, and further wiring water supply inside the house is carried out by 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.

Polymer parts can be connected not only using heating elements. But what about without soldering? 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. Another distinctive feature is the ability to connect plastic pipes with your own hands without special equipment. How to connect plastic pipes without soldering?

There are two ways to join 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

You can solder plastic parts 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, 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:

Crimping (aka compression)
Flanged
Welded
Threaded

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 that 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. In addition to UV resistance, compression fittings are also characterized by resistance to aggressive chemicals. The scope of application of connections using compression fittings is typical for low-rise buildings, in street water supply systems in villages and towns, and 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.

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 wrench.

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 a special glue that hardens quickly. The composition of the adhesive 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.

8845 0 0

Installation of a polypropylene pipeline is so simple that you can easily carry it out even in between watching your favorite television programs or series. The main thing is to stick to some general rules and understand the basic principles of connecting plastic pipes. I will tell you about all this based on my own experience.

Installation work

When starting to work with polypropylene pipes, I first of all remembered their main qualities:

The low price allowed me to do this without any serious outrage on the family budget. purchase all the necessary plastic products, including connecting fittings, with some margin. After all, even with the appropriate experience, no one is immune from making mistakes, and in case of an unsuccessful operation, it is better to have replacement parts on hand, rather than run to the store to get them, leaving behind an unfinished pipeline and an unwatched TV series;

Simple connection instructions including hot and cold methods. But simplicity does not exclude the need for availability of special tools for each of the options. Next, I will describe both in detail, since I used both soldering and crimp fittings in different areas. It’s better for you to make your choice in advance in order to ensure that you have the appropriate equipment. You can do this immediately after reading the article;
No corrosion processes. The plastic surface is not subject to either internal corrosion, which can be caused by the transported liquid, or external corrosion, which usually appears after laying the pipeline in the ground. Thus, when laying an underground water supply system, I knew that it would last for decades, but only taking into account the quality and absolute connections.

If you plan to use polypropylene pipes for installing a heating system, then I recommend purchasing reinforced samples that can withstand high temperatures, which will eliminate the risk of an emergency.

Based on the above, I purchased materials in reserve, took out necessary tools and prepared to make quality connections that can be left unattended for years to come.

Hot method

Where I planned to lower the water supply line underground, I had no doubts about the choice of connection method: soldering only. The melting point of propylene is only 260 degrees Celsius, and after solidification they form completely sealed seams. In addition, the process itself goes quite quickly. The impossibility of dismantling me in in this case I didn't care at all.

When laying pipelines indoors, welding is also great. The only exceptions may be those areas where pipe disassembly is required, or a situation in which it is not at all possible to obtain a pipe soldering iron.

If you are planning a one-time installation, then it is not necessary to purchase an expensive welding machine for plastic pipes; it would be more rational to rent one.

Before connecting polypropylene pipes using the “hot” method, in addition to the “iron”, I also prepared the following tools:

Now I will describe to you in detail how polypropylene pipes are connected, you will actually have time to install small sections while watching commercials on TV:

If this is your first time starting to solder plastic pipes, I recommend that you first practice on a couple of products that will not be part of the system being installed.
This way you will get the hang of it and be able to avoid common mistakes when performing “finishing” work.

Preparation:

I took the soldering iron out of the suitcase, in which he was, and placed it on a level and stable oak table. You can place the device on the floor or on the asphalt, the main thing is that it has a secure position, because you will have to deal with high temperatures;

Then inserted nozzles corresponding to the diameters of the elements to be soldered. In this case, a product is installed under the pipe in the form of a kind of “bowl”, which wraps around its edge from the outside, and under a pipe-shaped element that enters it and performs melting from the inside;

Turned on the device. If your device has a power regulator, then set it to 260-270 degrees Celsius. If this is not the case, then the unit will warm up to the specified temperature automatically;

Marking. Here I have already moved on to working with the pipes themselves. Using a tape measure and pencil marked out the necessary sections to form the pipeline. In addition, I measured the depth of the heating elements and, adding a couple of millimeters, applied it to the soldering areas. This can be done after cutting the products. This technique will help you control the immersion of the edge of the segment into the nozzle, since excessive melting can lead to the formation of a bulge in the seam, preventing the passage of liquid;

Cutting. The main thing here is to maintain a right angle. Thanks to having some experience, I have no problems with this, that is, he brought the scissors evenly to the line and made a clear cut in one smooth, strong movement. Also try to cut without worry and with the necessary effort. Otherwise, if you make oblique cuts, you will have to straighten them with a hacksaw or knife. It is also worth noting that when using reinforced pipes, you must first remove the top layer of plastic and the foil laid underneath with a shaver;

Heat. At this stage I I put the prepared coupling on the mandrel, and with some delay inserted the pipe section into the sleeve nozzle. Why late? Because the walls of the connecting element are thicker and, accordingly, they will take longer to melt, that is, a head start will not interfere with them. The products should be kept in this position, guided by the following table:

Docking. After the above time has passed, I I removed both fragments with melted edges from the welder and connected them, again, strictly at a right angle, after which he held for the time indicated in the following table:

Section, cm	Connection time, s	Cooling time, s
2	4	2
2,5	4	2
3,2	6	4
4	6	4
5	6	4
6,3	8	6
7,5	10	8
9	11	8
11	12	8

Under no circumstances should you rotate the products being joined while they are solidifying, as this may cause the seal to break.

Control. I ran water through the finished pipeline and checked all joints for leaks. If you suddenly find one in your place, then cut out the problem area and weld a new section in its place.

Cold method

Compression fittings allow you to connect polypropylene pipes without soldering. Everything you need except yourself connecting elements, so this crimp wrench, which, as a rule, is sold with them.

I performed the process of connecting pipes using the “cold” method as follows, when I didn’t have an “iron” at hand, and it was necessary to urgently restore the damaged section of the water supply:

Measured and cut the required piece of pipe;

Calibrated the hole. It is very important that its cross-section ideally matches the diameter of the fitting tail;

Placed on the edge of the pipe crimp sleeve;

Then I inserted the fitting itself inside;

Crimp the coupling with a special key, securely fixing it on the pipe;

I checked the coupling for the presence of characteristic grooves, indicating a high-quality connection.

The described method also well solves the problem of how to connect a metal pipe to a polypropylene pipe. To do this, simply select the appropriate compression fitting, one of the ends of which is equipped with a metal thread of the required pitch and diameter.

If you have a question: “How to connect a HDPE pipe to a polypropylene pipe?” Then again you can turn to compression fittings, since welding here most likely will not work due to the significant difference in the melting temperatures of these materials. At least I wouldn't risk it.

And a little fly in the ointment: despite some universality of the “cold” connection method, it requires much more time to implement. So, if you have to install a long pipeline, then during the advertising on TV you may not have time to complete the task.

Conclusion

A little practice and following the above recommendations will allow you to lay water supply lines from polypropylene pipes, practically without stopping from watching your favorite series and television programs. The main thing is to be attentive and careful, since a mistake made will take much more time to correct than timely control of the work being done.

The video in this article will allow you to familiarize yourself with some additional information, which is close in content to the material presented. If you have any additional questions on the topic, ask them in the comments.

July 25, 2016

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