Connection of polypropylene pipes - different technologies for your convenience. Soldering polypropylene pipes instruction: technology and step-by-step actions for soldering polypropylene pipes How to connect polypropylene pipes of different diameters

In any house, sooner or later the question arises. And if earlier only steel or cast iron pipes, now most owners prefer polymer materials. For example, they will be an excellent replacement option, they are well suited for both cold and hot water. Such products have an attractive appearance are able to withstand large pressure drops and are light in weight. In addition, it is very easy to mount such a system even on your own. How to connect correctly, this article will tell.

Advantages of polypropylene pipes

Such building materials have enough advantages over similar products. The advantages include the following indicators:

Scope of polypropylene pipes

Such material is resistant to various aggressive environments. Therefore, in addition to being used in everyday life, polypropylene parts are successfully used in the chemical industry. The scope of such material is as follows:

  • Organization of water supply for houses - installation of risers, house wiring, connection to metal pipes, with partial repairs pipeline;
  • Device heating system- with the help of this type of pipes, you can easily make a heating system. They are suitable both for replacing common risers and for in-house wiring with connection to metal radiators heating. It is also possible to use a warm floor system;
  • In industry - for pumping various liquids.

Installation of polypropylene pipes

The installation technology of any pipeline system implies a clear scheme according to which the connection will be made. First, draw on a piece of paper detailed drawing indicating all points of water intake, if water supply is planned. When installing heating, it is necessary to specify all radiators and a collector, if any. All work can be conditionally divided into items that are performed sequentially. The instruction for execution looks like this:

  • The individual parts of the entire system will be assembled. Installation is carried out using special welding equipment;
  • When the individual parts are hermetically welded, proceed to the final assembly;
  • The system is attached to the wall using special fasteners, if planned open type wiring and fits into pre-made grooves if the wiring is closed.

In order for the whole structure to work correctly after installation, it is important to know how to connect polypropylene pipes right.

When there is a need to connect polypropylene parts, and there is no welding equipment at hand, then you can use it, in which case welding equipment is not needed. For this purpose, various adapters are used. Pick up part right size and the destination will not be difficult. Connecting polypropylene pipes without soldering is quite simple, due to the metal insert at one end of the fitting. Such units are also distinguished by tightness and reliability.

To perform the installation of the pipeline system using compression fittings, it is enough to have on hand only a crimping wrench, which most often comes with adapters. It will take more time to assemble the structure in this way than by welding - this must also be taken into account when choosing an assembly option.

Tools and materials necessary for work

To perform work quickly and efficiently, it is worth stocking up with such tools and materials:

  • Special soldering iron. If it is not possible to buy a high-quality device, then it is better to rent it in a store, since cheap devices can be Bad quality and the joints will turn out to be unreliable;
  • Bulgarian - if it is planned to connect to a metal pipeline;
  • Fittings for various purposes;
  • Sealant, you can use a special tape or tow;
  • locksmith keys;
  • Perforator - for secure fastening finished system to Wall.

Soldering

To make high-quality and tight connections, it is important to purchase a good soldering iron for plastic pipes. The soldering iron is installed on flat surface with the help of small legs that come with the device. Parts of pipes that are intended for welding should preferably be kept in horizontal position, so much easier and more convenient to solder. If there is a need to weld vertically standing pipes, then you can’t do without an assistant. The soldering iron is removed from the legs, while the partner firmly fixes the pipe to the junction, the master needs to carefully solder it.

If pipes with a diameter of less than 63 mm are welded, then socket or socket welding is used. The connection is made using a coupling, and if threaded assemblies are required, they are made using fittings. When working with pipes with a diameter of more than 63 mm, butt welding is the most reliable and hermetic type of connection for such products. When the pipeline is made from pipes with a diameter of up to 40 mm, a manual welding machine can be used.

Performing work independently, all soldering can be divided into several successive stages:

  • The soldering iron is plugged into the network and heats up well, usually 10-15 minutes is enough for this. While waiting for heating, you can once again check whether all the blanks are there, and cut the missing ones;
  • When the heating of the device is completed, we put the pipe and connection on its nozzles. It is important to do this clearly and quickly, you can not twist or pull the parts, as the soldering will turn out to be uneven;
  • When the elements are heated, they are removed from the nozzles and connected to each other by light pressure. It is not necessary to twist the parts - this will reduce the tightness of the joint;
  • After one node is completed, the remaining nodes begin to solder, continue until the entire pipeline system is completed.

After heating, polypropylene pipes cool quickly, and a very tight connection is obtained. In a system mounted in this way, water can be supplied within an hour.

If you want to connect polypropylene pipes with metal products, then fittings are used that have a thread for metal and a smooth sleeve for polymer. The algorithm of work looks like this:

  1. The steel pipe is pre-prepared for work, for this the old coupling is untwisted on it, and if it is not there, then the pipe is cut by a grinder, its end is lubricated with oil and a new thread is cut;
  2. The thread is degreased, a sealing material is wound onto it, tow or elastic tape can be used. The winding should be carried out along the thread, usually one or two turns are enough;
  3. The fitting in this case is fixed manually, without the use of keys and other tools. Otherwise, over-tightening may permanently damage the part;
  4. Lastly, the polypropylene element is welded to the smooth end of the coupling.

What to pay attention to when working

When performing such a repair, it is worth paying attention Special attention for these details:

  1. The room must be well ventilated, as harmful smoke is released during soldering. In addition, you need to use personal protection respiratory tract;
  2. It is best to cut polypropylene pipes with plastic scissors. If they are not at hand, and a hacksaw is used, then the edges will need to be carefully sanded;
  3. When working, use work gloves or gloves, as melted plastic may get on the skin of the hands.

Why pipe connections must be strong

For comfortable living in a house or apartment it is not enough to have luxurious furnishings and innovative household appliances. It is necessary that nothing disturb the comfort and well-being of the living family. A well-made heating and water supply system will save you from damage to furniture and floor covering, as well as problems with neighbors, in case of water leakage. Doing overhauls you need not save on replacing risers and general wiring - this will help save a lot of money on additional repairs that will have to be done if the pipes leak at some point.

It is best to use proven materials that have excellent performance characteristics. Polypropylene pipes can be used for any type of wiring, whether it is cold water or a heating system. This material has proven itself high quality on affordable price. All installation work can be done independently, which will also save a lot of money. Now you know how to connect polypropylene pipes correctly.

The connection of polypropylene and metal pipes plays an important role in replacing the plumbing and heating system. Most apartment buildings metal is mainly used for sewerage and water supply. This material quickly rusts, respectively, the permeability of pipes decreases, leaks begin. Plastic has a shelf life of about 50 years. But replacing pipes is not as easy as it seems at first glance. The best option will change the entire riser, but this requires the consent of all residents. As practice shows, this option is rarely implemented. Often, residents make plastic insert to the public water supply only in his apartment.

Connection options

There are two ways to combine metal with plastic: using threads or flanges. Each of the methods has its own characteristics. For example, the threaded version is optimally suited for pipes with a diameter of up to 40 mm. In other words, for residential apartments. Docking between pipes is carried out using a special adapter - a fitting. This fixture is ideal for combined connections. On the one hand, it is made in the form of a smooth sleeve for polypropylene, on the other - threaded connection.

Flanges are only suitable for large pipelines over 100 millimeters in diameter.

Threaded

This type of plumbing connection is called "American". Plastic is soldered from the side of the coupling. By the way, metal-plastic, polyethylene and pipelines are considered plastic. Threaded respectively joins metal part. Here's what it looks like in practice:

  • Installation begins with unscrewing the coupling at the site of the intended joint. If there is no coupling, then the pipe is simply cut off. Then at the junction it is necessary to cut the thread. To do this, it is recommended to lubricate the place where the thread cutter enters with oil or grease.
  • The threaded connection must be sealed to prevent possible leakage. This is done using a fum tape or linen, which is wound between the threads. For greater reliability, silicone is applied on top. The amount of wound material should not exceed 1-2 turns. Otherwise, it will be problematic to screw the fitting. It is necessary to wind linen or fum-tape in a clockwise direction.
  • Then they wrap. It is best to do this by hand, without using a gas key. The fittings are made of a rather brittle material and excessive compression can damage the adapter. The best solution is to tighten the fitting slightly if a leak is detected after the water has been supplied. But remember that you need to use the tool very carefully.
  • From the side of the smooth coupling, a polypropylene pipe is welded.
  • Water is supplied to the pipes.

Advice. If the screw connection is used for a heating system, it is recommended to replace the rubber seal on the coupling side with a silicone one. Temperature changes will quickly destroy the rubber, and water will flow at the junction of the pipes. Silicone looks more reliable in this regard.

Flange connections

This method is based on linking steel pipe and plastic insert detachable device - flange. AT metal pipe a flange is inserted in the form of a sleeve, a union flange is attached to it with the help of bolts with a transition to plastic. This is done as follows:

  1. The insertion point is determined and a neat cut of the pipe is made. Irregularities at the cut point must be processed with a grinder.
  2. The flange in the form of a sleeve is inspected, the sharp edges are smoothed with a file. This precaution will protect the plastic pipe from damage. Only after that the flange is installed in place.
  3. Another flange with an adapter for polypropylene pipes is attracted to it with bolts. A rubber gasket is installed at the junction. Mounting bolts tighten with no extra effort.

To make a pipe connection from different materials, within the power of any person. But if you are not sure that you can do a quality job, it is better to contact a plumber.

Metal pipes have become obsolete some time ago. They are being replaced by plastic counterparts. By their own performance characteristics they are not inferior to metal, and sometimes even surpass it.

Correct connection a metal pipe with polypropylene becomes a guarantee that the system will work without interruption, with maximum reliability.

How to connect polypropylene pipes with metal ones?

It is not uncommon for situations where .

To understand how to properly connect polyethylene pipe with polypropylene or metal watch video tutorials posted in this article.

There are several ways to properly connect.

  • With thread. Assumes they are using fittings that look like couplings. One end is supplied with a thread on the metal, and the other with a cut, with perfect smoothness.
  • flange type. When bolts with studs tighten the structures of the flanges themselves. They will help you understand how to connect polypropylene pipes, videos will make the process more visual.

Install threaded fittings

These types of connections are relevant if pipes of medium, small diameter are taken together. Their size should not exceed 40 millimeters.

The thread on the fittings is present not only inside, but also outside. It is needed to fasten the metal sides and ends to the parts. The smooth cut of the coupling is located on opposite side. It involves soldering plastic.

Fittings are mounted using a simple technology.

  • The workpiece is cut at a right angle, in the place where the joint is supposed to be. Solid oil is used to process the edge. Then they take a thread cutter, and finish processing.
  • After that, they must be cleaned so that there is no metal shavings. For the future joint, sealing cannot be dispensed with, which involves the use of FUM tapes or tow.
  • The fitting structure is screwed onto a part with a cut, with preliminary preparation. This does not require too much effort. The part may crack if the tools press it too hard.
  • A smooth cut is screwed to a plastic pipe. Easy to understand how to connect polyethylene pipe with polypropylene.

The sealing material is laid out along the thread so that at least 1-2 turns are closed to it.

Video: how to connect the pipeline

We install flanges

This option is more suitable for those who work with large diameters. Thanks to him, during operation, there is less problems with access to do cleaning if necessary.

The flanges look like flat discs supported by straight brutes.

Installation of pipes in the system consists of several stages.

  1. It all starts with creating an even cut at the ends of the blanks. The main thing is that there are no dust and chips inside.
  2. Then they proceed to putting on the flanges on sections prepared in advance. Between the places with the disks we have rubber gaskets.
  3. Bolts are used to connect flanges to each other. It is important that the tightening is uniform, without applying too much force.

Polypropylene pipes and their connection

The ends of pipes made of this material are affected high temperature to connect products, to dock. You can also use gluing or special fittings.

Video: how to solder

How to solder structures?

Polypropylene blanks cannot be joined without a special welding machine, which is called an "iron". It works when connected to a regular electrical network.

It is better to purchase the materials themselves with a small margin, in case possible errors.

The process consists of several stages. This will allow you to understand how to solder a polypropylene pipe.

  • Several cuts are made where the joints will be located in the future. A thorough cleaning for the ends is also required. On their surface make special marks with a marker. They indicate at what depth the parts should be inside the heating apparatus. The temperature of the soldering iron should be at least 270 degrees.
  • Strictly perpendicular connection of nozzles with a hot soldering iron. The same is done with the ends of other compounds.
  • 10-15 second wait until melting is complete. Then they get rid of the nozzles, and the parts are again connected to each other. They are slightly applied to each other, but turning is unacceptable.
  • Parts for docking should be left for some time in one position until they cool down.

Video: learning how to solder

Socket soldering is an option that is used for pipes with 40 mm and larger diameters. But it is recommended to trust such work to specialists, only they know about all the features.

It is better to heat the connecting elements from the inside, and the pipes from the outside. Then it will be easier to create knots with high strength. Otherwise, small tubercles are formed inside, due to which the patency decreases. Purging the structure will allow you to forget about such problems.

Features of the "cold" method

It is assumed that in this case compression fittings are used. Of the tools, a regular crimp wrench is enough.

Assembly process looks like that.

  1. As usual, work begins with cuts at the ends. After that, you need to check whether the edge is in a perpendicular position. Cleaning the ends from burrs is carried out with a wire washcloth or fine-grained sandpaper.
  2. The coupling nut is put on one of the ends of the pipe. The thread must go to the fitting. Then proceed to the operation of rings with compression. They also go to the fitting side, but with long bevels.
  3. The fitting is strung on the surface of the end prepared in advance. The part is inserted into the inner surface until it stops.
  4. After that, the coupling nut is fully tightened. The system is checked for tightness.

Video

What points should be paid attention to when welding?

Professional soldering irons are quite expensive. It is better to purchase inexpensive "amateur" options if the work is intermittent. These usually have several running nozzles at once. You can rent tools. This will not affect the quality of the final connections.

A stable stand has become a must for almost all soldering irons. Even professionals only make connections if the tool remains stable. It takes no more than 10-15 minutes to heat up the working surfaces.

There are only 2 parts in the connecting nozzles - a drone, on which the coupling is heated, as well as a sleeve, inside of which there is a pipe with a drone.

Nozzle parts are installed on the soldering iron when it is still cold. And only after that the device is connected to the network. Work should begin only when the indicators go out.

Video

This happens during the second heating cycle. But the warm-up time is determined by several factors:

  1. Pipe type.
  2. Wall thickness.
  3. Construction diameter.

All these values ​​are usually indicated in the table that comes with soldering irons.

Sewer systems and features of their connection

Many connect plastic pipes not only with metal, but also with cast-iron counterparts.

Such joints are structurally different from others. You will need to purchase special components:

  • seals.
  • Corrugation.
  • Cuff.

The selection and purchase of suitable components should not cause any special problems. But you can use improvised materials, if you find suitable option It does not work.

From microporous rubber, for example, a seal is cut out. A long narrow tape must be placed in the gap between the connected elements. A blunt, wide screwdriver will help compact this material.

Video

Coinage is unacceptable for several reasons. It can deform plastic pipes, interfere with the creation of sealed joints. But even after the work is done, the likelihood of leaks will remain high.

cement mortar also does not have a high service life. Miscellaneous materials have a different coefficient of thermal expansion, and this difference has a negative impact on the design.

Cracks appear too quickly in cemented joints, such structures simply lose their integrity.

Plastic pipes are sometimes combined with copper pipes, but this option is extremely rare. The connection of a metal pipe with polypropylene is more common.

Entries

(PP), gradually replaced traditional metal ones not only in water supply systems, but also in heating. Not the last role in the growing popularity is played by ease of installation - it is quite easy to do the installation of polypropylene pipes with your own hands, even in the absence of special skills and knowledge.

Positive qualities of PP pipes

Such pipes have the following advantages:


Attention! In most cases, the maximum allowable temperature of the working fluid is 90ᵒС (this includes products of the “twentieth” and “twenty-first” brands). When applying cold water, where the temperature often does not exceed 20ᵒС, pipes from the “eleventh” to the “sixteenth” brand are used.



Important installation details

PP pipes are connected using threaded/non-threaded fittings. In turn, threaded products can be:

  • one-piece;
  • detachable.

It is worth noting that the installation is primarily affected by operating conditions.


After becoming familiar with all necessary information you can get to work.

Stage one. Drafting a project

Installation work should begin with the drafting of the future highway. An important criterion here is ergonomics, as a result of which the number of turns and connecting elements should be minimal.


When arranging the heating system, a well-designed project is especially important, in which the location of such elements as:

  • couplings;
  • adapters;
  • fasteners;
  • corners;
  • heating equipment.

The line is connected to the radiators in a one- or two-pipe way, from the side or from the bottom.


Attention! Not less than important point when designing, there is also a possible thermal expansion of polypropylene - this should also be taken into account.

Plumbing


Here, the main is connected to a centralized system in order to supply the necessary plumbing fixtures- toilets, sinks, boilers, etc. There are two ways to perform wiring.

Method number 1. Open option. Horizontal pipes are installed slightly above the floor level, and vertical pipes are installed exclusively at the corners. All this makes the pipeline less noticeable.

Method number 2. Closed option. It is extremely difficult to perform, since it involves preliminary carrying out the most accurate calculations. Pipes (necessarily solid) are immured into the walls, and each joint should have free access.


In addition, plumbing can be:

  • sequential type (the most budgetary and easiest option to implement);
  • collector type (a collector is used when supplying water);
  • with through sockets (little popular).

Stage two. Welding of polypropylene pipes


This procedure will require electric jigsaw(cutting polypropylene) and special welding equipment.


Attention! Before starting work, sleeves (nozzles) of the desired diameter are put on. Then, using the thermostat, the appropriate temperature is set (about 260-265ᵒС), after which the device warms up (you can learn about the warm-up time from the manufacturer's instructions).

Step one. While the apparatus is warming up, the necessary measurements are taken, the pipes are marked and cut.


Step two. The ends of the products that are planned to be interconnected are carefully cleaned and degreased.

Step three. Using a pencil, the depth of entry of each product into the sleeve is marked. It is characteristic that at the same time there should be at least a millimeter gap, so the pipes do not abut against the coupling of the fitting.


Step four. A PP pipe with a fitting is put on the sleeve in accordance with the marks made, and the heating of all elements must occur simultaneously.

Attention! In the case of a bad nozzle (or vice versa - too loose) of one of the elements, it is immediately rejected.

The duration of heating depends not only on the diameter of the products, but also on the depth of welding (this can be found in the table below).


Step five. After a certain period of time, the products are removed and connected, with little effort, sitting on top of each other. It is forbidden to rotate the elements along the axial line.

Step six. Within a few seconds after the connection, the primary adjustment is performed, then the elements are finally fixed.

Attention! The assembly sequence is determined in advance.

If there are no gaps left at the junction, then it (the connection) can be considered of high quality.

Video - Welding PP pipes

Welding Machine Manufacturing

In view of the fact that a more or less good one costs over a thousand rubles, it is cheaper to rent it or make it yourself. If the latter was chosen, then for work you should prepare:


The sequence of actions should be as follows.

Step one. In order to improve heat transfer, the sole of the iron is treated with thermal paste, then a Teflon sleeve is fixed. The location of the latter is determined in advance - the wide part up or down.

Step two. A sharp “nose” is sawn off for more convenient work near the walls.

Step three. The heating of the iron is carried out until the device switches off a second time.

Step four. It is good if the iron is equipped with a temperature sensor - this will allow you to accurately determine the heating temperature. But there is an easier way - through lead. This metal melts at 230ᵒС and higher, which approximately coincides with the temperature required for welding.

Further technology is identical to that described above.

Stage three. Pipeline installation


When laying the highway you will need:

  • pipes;
  • tees;
  • Ball Valves;
  • plugs;
  • adapters;
  • bends;
  • couplings;
  • detachable connecting elements;
  • threaded fittings;
  • plastic clamps.

First of all, the installation of the main elements of the system (plumbing, radiators, boilers, etc.) is carried out, after which, in accordance with the drafted project, the future highway is marked. The elements of the pipeline are interconnected by means of couplings.

Attention! Hard-to-reach parts of the system are assembled separately.

If we are talking about heating or hot water, then thermal expansion is taken into account. To compensate for the latter, it is desirable to use mobile connections. When installing a closed pipeline, the walls are first ditched (in appropriate places, a groove is made two pipe diameters wide).

The pipeline may only be filled with liquid after one hour has elapsed from the end of installation. Hydraulic test can be carried out only in a day.




Sewer system from PP pipes

As noted earlier, polypropylene pipes are actively used today in the arrangement. The installation procedure in this case has its own nuances.


Internal sewerage

There are a number of rules that must be observed when installing sewerage in the house.

  1. The pipeline is laid at an angle in the direction sewer riser(about 3 cm per linear meter).
  2. If the room is not heated, then the pipes are additionally insulated with mineral wool.
  3. Do not make sharp turns at an angle of 90ᵒ, so-called half-bends are used instead.
  4. Fan-type ventilation is a mandatory component of the sewer system, which will prevent penetration bad smell in a dwelling.
  5. The toilet is connected only after the sink, otherwise the water seal will break.

Outdoor sewerage

Step one. The diameter of the pipes is determined, depending mainly on the number of people living in the house.

Step two. From the sewer riser, a trench is dug to the septic tank or cesspool. At the same time, a slope is observed, depending on the soil freezing line, or the pipeline is insulated with mineral wool.



Step three. The bottom is covered with a "pillow" of sand. Its thickness should be at least 20 cm.

Step four. A pipeline is being laid. It is important to avoid possible sagging, otherwise the connections will soon collapse.

Attention! The seams do not need to be sealed, since the PP pipes for external use already have rubber seals.

Horizontal drilling of a trench for the pipeline is carried out using special equipment with pressure-action jack-pumps. Drilling takes place using a steel cone-shaped tip. Similar technology is used in the construction of:

  • auto and railway roads;
  • pipelines to basements;
  • highways to working wells.

Do-it-yourself installation of a PP pipeline will help save a lot, but only if it is done correctly.

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Mounting polypropylene pipeline so simple that you can easily do it even in between watching your favorite TV shows or series. The main thing is to stick to some general rules and understand the basic principles of joining plastic pipes. I will tell you all this from my own experience.

Installation work

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

  • The low price allowed me, without much abuse of family budget purchase all necessary plastic products, including connecting fittings, with some margin. After all, even having the appropriate experience, no one is immune from making mistakes, and it is better to have replacement parts at hand in case of an unsuccessful operation, and not run after them to the store, leaving an unfinished pipeline and an unfinished series;

  • A simple connection instruction including "hot" and "cold" methods. But simplicity does not preclude the need for the presence of a special tool for each of the options. Next, I will describe in detail both of them, since in different areas I used both soldering and compression fittings. It is better for you to make a choice in advance in order to take care of the availability of appropriate equipment. You can do it right after reading the article;
  • No corrosive processes. plastic surface is not subject to either internal corrosion, which can be provoked by the transported liquid, or external, which usually occurs after laying the pipeline in the ground. Thus, when laying underground water supply, 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 foregoing, I purchased materials with a margin, took out the right 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 the connection method: only soldering. The melting point of propylene is only 260 degrees Celsius, and after solidification are formed fully sealed seams. In addition, the process itself is quite fast. The impossibility of dismantling me in this case did not bother me at all.

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

If you have a one-time installation planned, then not cheap welding machine for plastic pipes it is not necessary to purchase, it would be more rational to rent it.

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 really will have time to install small sections during the period of scrolling commercials on TV:

If this is your first time trying to solder plastic pipes, then I recommend that you first practice on a couple of products that will not be included in the system being installed.
So you "fill your hand" and can avoid typical mistakes when performing "finishing" work.

  1. Training:
    • I took out a soldering iron from a suitcase where he was, and placed it on a level and stable oak table. You can put the device on the floor or on the asphalt, the main thing is that it has a reliable position, because you have to deal with high temperatures;

    • Then inserted nozzles corresponding to the diameters of the elements to be soldered. At the same time, a product is installed under the pipe in the form of a kind of “bowl”, which wraps around its edge with outside, and under the tubular 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 automatically heat up to the specified temperature;

  1. Markup. Here I have already moved on to work with the pipes themselves. With a tape measure and a pencil marked out the necessary segments for the formation of the pipeline. In addition, measured the depth heating elements and, adding a couple of millimeters, applied it to the soldering points. This can be done after cutting products. This technique will help you control the immersion of the edge of the cut into the nozzle, since excessive melting can lead to the formation of a bulge in the seam that prevents the passage of liquid;

  1. Cutting. The main thing here is to observe a right angle. Thanks to some experience, I have no problems with this, that is, evenly brought the scissors to the line and made a clear cut with one smooth strong movement. Try also, without excitement, with the necessary efforts to complete the cutting. Otherwise, if you make oblique cuts, you will have to level them with a hacksaw or knife. It is also worth noting that when using reinforced pipes, you must first remove the upper layer plastic and foil laid under it;

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

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

In no case do not turn the connected products at the time of solidification, as this may provoke a violation of the tightness of the seam.

  1. Control. I let water through the finished pipeline and checked all joints for leaks. If you suddenly find one in yourself, then cut it out problem area and weld a new piece in its place.

cold method

Compression fittings allow you to connect polypropylene pipes without soldering. All you need besides the connectors themselves is crimp key, which, as a rule, is sold with them.

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

  1. Measured and cut off the desired pipe fragment;

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

  1. Put on the edge of the pipe ferrule;

  1. Then I inserted the fitting itself inside;

  1. Crimped the clutch with a special key, securely fixing it on the pipe;

  1. I checked the coupling for the presence of characteristic recesses, indicating a quality connection.

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

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

And a bit of "tar in the ointment": despite some versatility of the "cold" connection method, it takes much more time to implement. So, if you have to install a long pipeline, then during the time of advertising on TV you may not have time to cope with the task.

Conclusion

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

The video in this article will allow you to familiarize yourself with some of the 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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