Solder plastic pipes at home. Soldering polypropylene pipes with your own hands

If you have made a decision on our own make plumbing for your home, then know that the best material There will be plastic pipes for this. In order to unified system, you need to understand how plastic is welded. However, don’t let this scare you, since the soldering process itself plastic pipes is not particularly complicated and does not require any large number special tools.

To carry out welding work you will need:

roulette;
marker;
building level;
scissors for cutting plastic pipes;
welding device for plastic pipes.

Almost every craftsman has all the tools, except the last one. You may need the latter only once in your life, so it is much more advisable not to buy it, but to borrow or rent it.

Briefly about the welding machine

Before you start soldering, you should briefly become familiar with the device you are about to use.

An important element is the sole, equipped with heating elements. Convenience of work is ensured by the fact that there are holes on the base that allow you to attach special soldering attachments. The temperature is adjusted using a thermostat located on the body.

Pipe soldering process

When starting soldering, the device must be installed in the desired position and nozzles of the appropriate size must be secured to it. Using the thermostat, set the required temperature:

260°C for polypropylene pipes;
220°C for polyethylene pipes.

Allow the device to warm up for 10-20 minutes until the indicator goes out.

When performing soldering, you must proceed from the following data:

External pipe size, mm
Interval to mark, mm
Heating duration, sec
Maximum duration of technological pause, sec
Cooling duration, min

The soldering process boils down to the following operations:

Using special scissors, cut the pipe to the required length, using an alcohol solution, clean the joints from dirt and grease;
Place the pipe and counter socket in the nozzle and heat for the time indicated in the table;
Connect the heated elements together by inserting the pipe into the socket. This operation must be performed during the time called a technological pause in the table;
After completing the operation, check the quality of the resulting welded joint, which will be noticeable in the form of plastic rings.

We have just outlined the essence of the soldering process. However, to ensure reliable operation of the pipeline, attention should be paid to the following details:

The first welding operation should be performed five minutes after the soldering iron has warmed up.
Cook if necessary reinforced pipes You should use a special tool called a shaver to remove the aluminum and polypropylene, which form the top two layers, from the pipe. After this, the pipes are joined according to the method already described.
Welding work should only be carried out when the temperature environment above zero.
After welding, allow the connected pipes to cool, avoiding their rotation or mutual movement. In the case where the connecting seam turns out to be of poor quality, the assembly must be cut and the welding process must be repeated.

When working with, it is necessary to observe certain precautions, failure to comply with which may affect the quality welded joints. In particular, it must be remembered that the nozzles are coated with Teflon, which prevents the formation of carbon deposits. At the end of each operation, melted residues must be removed from them using a wooden spatula. It is strictly forbidden to remove any remaining material after the attachments have cooled, as this could damage the coating and cause a malfunction of the entire device.

Replacement modern systems heating and repair of water supply lines, the basis for which are plastic pipes, are problematic to carry out without the use of soldering. And therefore, the question of how to solder plastic pipes in order to connect them into a single system is relevant for many owners who decide to do the work themselves without involving craftsmen.

Selecting the necessary tools

Plastic pipes are an indispensable element both in construction and repair. They are easy to install and differ chemical resistance and are able to withstand operating pressures up to 2 bar at temperatures up to 95°C.

But fulfill high-quality installation systems and correctly soldering plastic pipes is impossible without the use of special equipment.

Due to the ease of installation and environmental friendliness of the material, plastic pipes are widely used in water supply and heating. residential buildings

In addition to pipes and fittings the right size For welding work you will need:

soldering iron with nozzles;
building level;
roulette;
pipe cutting scissors;
rags made of thick fabrics.

The soldering iron comes with tips of different diameters with non-stick Teflon coating. When heated, they melt the outer surface of the ends of the pipes and inner side connecting elements.

Advice: in order to save time on replacing nozzles during work, it is better to choose a device with the ability to install two or three heating sleeves at the same time.

For use in living conditions To solder plastic pipes with a diameter of 16-63 mm, a unit with a power of up to 1200 kW is quite suitable

When planning to solder plastic pipes yourself, you should adhere to a number of basic recommendations:

The soldering iron is placed on the sole and secured with the legs on a flat surface. Nozzles of the required diameter are moved closer to the edge.
They start working with the unit only after it has completely warmed up, which occurs 10 minutes after switching on. The readiness of the device will be indicated by the indicator light on the case.
The parts to be connected are heated in parallel. Welding work can only be carried out if the ambient temperature is above 0°C.
Remains of plastic from heated sleeves are removed immediately after each soldering stage, using pieces of thick fabric for this purpose. Cleaning cooled attachments is not permitted, as this may damage the Teflon coating and cause damage to the device.

You can avoid overheating by connecting plastic pipes with a soldering iron to the regulator

During operation, it is important not to exceed the heating temperature of the sleeve, the upper limit of which is 260°C. If the heating is insufficient, the plastic will not acquire viscous plasticity, which will cause an unreliable connection. And at an elevated temperature of 270°C, the material loses stability and sticks, preventing the pipe from fitting tightly into the fitting.

Tip: when working with a unit that does not have the function electronic adjustment temperature, capable of controlling heating with an accuracy of one degree; you can use a special thermometer to measure it.

Plastic pipe soldering technology

Work on connecting plastic elements by soldering includes a number of main stages. Without experience in soldering plastic pipes, it is advisable to make two or three test connections in advance. To control the correctness of welding, it is advisable to cut the cooled sample along the axis, making sure that the joints are solid.

When preparing connecting elements, it should be taken into account that inner diameter the fitting should be slightly smaller than the outer diameter of the pipe combined with it

Preparing elements

Using a cutter or scissors, cut the pipes to the required length, maintaining the angle of inclination of the cuts within 35-45°. If it is necessary to solder metal-plastic pipes, the cut ends must be cleaned with a shaver.

Sections and working parts of the surface are degreased with a soap or alcohol solution. Markers are placed along the edges of the sections with a marker, which will act as a guide when joining the elements.

Performing soldering

Heating a soldering iron with a nozzle until required temperature, the end of the pipe is inserted onto the sleeve to the full welding depth, and the socket of the fitting is threaded onto the mandrel. The soldering operation occurs very quickly and lasts no more than 10 seconds. The countdown begins from the moment the ends are inserted.

The holding time and temperature at which plastic pipes are soldered are determined from the table

If you need to solder metal-plastic pipe with a connecting element, a fitting is first put on the heating sleeve, which takes more time to warm up the inner walls. Tight fit of the fitting on the sleeve – required condition high-quality heating.

When heating plastic elements, any rotation should be avoided. The maximum permissible rotation angle should not exceed 10°C.

Tip: for safety reasons, it is better to solder plastic pipes while wearing safety glasses and gloves.

Assembly of the structure

The melted ends of the heated elements are removed from the soldering iron and connected to each other, focusing on the marks marked with a marker. When connecting parts, no axial rotations to the full depth of the fitting socket are allowed under mechanical loads.

The process of how to solder plastic pipes is clearly presented in the video:

When plastic pipes are sealed correctly, a continuous bead is formed around the edge of the socket, which looks like a small ring.

Combining the details Special attention pay correct position taps and tees. IN assembled structure The faucet handle should be easy to rotate to any position.

The connected parts are left to cool completely, preventing them from turning. If the connecting seam turns out to be of poor quality, the knot is cut off and the operation is repeated.

Polypropylene is a popular material that is widely used in many construction and installation fields. And the water supply was no exception. Polypropylene lines are characterized by corrosion resistance, long service life, good thermal conductivity and tightness. The last criterion depends entirely on how correctly the soldering of plastic pipes is carried out. And you heard right. Polypropylene, unlike polyvinyl chloride, is necessary and can simply be soldered into a single structure using a special welding machine for polymers.

On how to use an iron (as a soldering iron for plastic is called in craftsman circles) and how to properly solder a plumbing system, see our material below with detailed video instructions.

Important: before deciding to install a water supply system made of polypropylene pipes, you should find out that this material is subject to high temperatures prone to stretching. That is, if you use polypropylene pipes for the DHW main, then such communication may simply sag over time. Therefore for hot water Only aluminum-reinforced polypropylene pipes should be used.

In order to, following the instructions, solder the entire water supply system with its long-term operation, it is advisable to understand what type of pipes the master is working with. After all, polypropylene is divided into four categories, each of which is intended for use in certain conditions. Failure to follow operating instructions will negate all the efforts of the technician, and the water supply will ultimately fail.

So, polypropylene pipes come in four types:

Tubes marked PN 10. Thin-walled material of small diameter, intended for use at temperatures up to 45 degrees. Can be used in a cold water system or underfloor heating.
Tubes marked PN 16. You should be extremely careful here. Polypropylene of this category can be used either in conditions of high pressure in communications, but for cold water, or at low pressure in the hot water network.
The PN 20 marking allows the use of plastic pipes for the construction of any pipeline operating at a temperature not exceeding +80 degrees.
PN 25 tubes are the same tubes reinforced with aluminum or fiberglass, suitable for installing a hot water supply system. Here the material can be used in conditions temperature regime up to 95 degrees Celsius.

In addition, it is worth understanding that all polypropylene pipes of any category can be sold different color. Color doesn't matter, other than black. This color of the pipes indicates that the PP tube is highly protected from UV radiation.

Important: all polypropylene pipes will be properly operated only if the operating pressure and temperature ranges in the network are observed. The higher the water temperature in the water supply, the lower the pressure should be, and vice versa.

Pipe soldering machine

Plastic pipes can only be soldered using special tool- soldering iron. The household unit is shaped like a kind of iron on a stand. Its heating base (mirror) is capable of warming up to temperatures above 260 degrees, which allows you to melt (solder) the polymer for a high-quality connection.

The heating base has places for attaching attachments. As a rule, in household appliance 2-3 attachments can be attached to the sole at the same time. Their diameter depends on the configuration that the purchased tool originally had. But most often these are nozzles with a diameter of 16-32 mm.

Important: you can only solder pipes with your own hands at home, the diameter of which does not exceed 63 mm. In this case, they are connected exclusively using couplings and fittings. Larger diameter pipes are soldered using professional equipment and most often end-to-end.

You can solder plastic pipes with your own hands using either a sword-shaped apparatus or a cylindrical one. The quality of soldering will be unchanged and equally good if you follow the instructions.

Important: DIY work with a soldering iron should only be carried out in a room heated to above-zero temperatures. It is important to know that the cooler it is in the room, the longer the heating time for plastic and metal-plastic (in the case of a reinforced pipe) should be.

Preparatory stage

First of all, you should prepare a pipe cutter, a marker and a tape measure. Using such tools, the tube will be marked and cut into individual elements.
After all the metal-plastic and PVC parts of the future system have been cut, it is necessary to thoroughly clean with alcohol all places of intended connections, including couplings and fittings.

Important: aluminum-reinforced pipe is cut using a shaver. In this case, before soldering, you should first remove upper layer polypropylene and aluminum. This will improve the quality of the connection. Tubes, fiberglass reinforced, are soldered in the same way as standard polypropylene.

For those who do not know how to properly solder plastic pipes (metal-plastic/PVC) at home with their own hands, you should adhere to the following recommendations when performing work:

The soldering process begins no earlier than 5-10 minutes after turning on the soldering iron. It should warm up to the set temperature.
Polypropylene pipes with a diameter of up to 40 mm can be successfully soldered using a sword-shaped apparatus. For larger diameter tubes it is better to use a more professional centering unit.
After heating the polymer (PVC or metal-plastic), pieces of soft plastic will remain on the Teflon coating of the nozzles. It is advisable to remove them immediately with a wooden spatula. It is impossible to clean off polymer residues on a cooled nozzle or using metal devices. There is a risk of damaging the Teflon coating and, as a result, damaging the part.

Important: timely cleaning of the nozzle from polymer residues allows you to obtain a guaranteed even and smooth connection.

Soldering process

So, solder polypropylene (PVC) elements of the water supply system with your own hands in several stages:

A soldering iron is installed on the platform and securely fixed. The device is asked desired temperature. For polypropylene it is 260 degrees, for polyethylene - 220.
Before turning on the soldering iron, put attachments on the platform required diameter.
As soon as the device warms up, you can take a piece of tube and a fitting under it and put it on the nozzle. We maintain the parts in accordance with the diameter of the elements (see recommendations below).
As soon as all parts of the pipeline are thoroughly heated, stand firmly and slowly join the parts until they fit tightly. Leave the communication section until it cools completely. All parts of the communication need to be soldered in this way.

Important: once the pipe is inserted into the fitting, it is prohibited to move it or rotate it in any way. The polymer (PVC) in the lumen of the pipe may shrink and the connection will depressurize.

After the pipes are soldered and cooled, you can blow water or air through them to check the tightness of the connection.

For tubes with a cross-section of 16 mm - hold for 5 s;
For tubes with a diameter of 20 mm - heating for 6 seconds;
Pipes 25 mm - heat for 7 seconds;
Elements 32 mm - solder 8 sec;
Pipes with a diameter of 40 mm - heating for 12 seconds;
Tubes diameter 50 mm - 24 sec;
Pipe 63 mm - 40 sec.

Important advice: if the master is soldering polypropylene (PVC) pipes with his own hands for the first time, you can first practice on unnecessary pieces of polypropylene elements. In addition, if flaws were made in the connection during the soldering process, then you can simply cut off this section of the pipeline and solder a new one.

Advice: buying a soldering iron for a one-time DIY job is not financially feasible. In this case, it is better to take the device for PVC pipes for rent in a specialized hardware store.

The range of construction products is growing every year. appear on the market modern materials, which facilitate the construction stages and increase the productivity of workers. Consumers tend to use when planning internal systems in houses there are pipelines with a long service life. A suitable alternative that meets consumer needs is plastic internal communications branches. How to solder plastic pipes?

Another advantage of such technologies is the ability to independently repair or replace water supply and heating networks. How to solder plastic pipes for water supply?

Let's understand the types

Metal-plastic

Polyethylene

Such communications are divided into subtypes:

Polyethylene - used for laying wiring inside buildings and external routes. It is possible to use them on pipe connections high blood pressure and at low ambient temperatures.
PVC is used to reduce the cost of repairs.
Metal-plastic - the most practical products, for a period of time beneficial use more than 50 years. Perfect option to replace hot water supply.

The widespread use of this material is due to a number of reasons. Positive properties of such structures, in contrast to metal ones:

Long term operation.
Low corrosivity.
Easy to install.
Does not require special skills.
Ecologically pure material.
Economical and easy to use.
Lightweight and easy to transport.
They don't give in harmful effects microorganisms.

Your water supply

Coupling assembly

Polyethylene models are mounted using the welded method or using couplings/fittings (coupling assembly). How to solder plastic pipes for water supply?

For new water supply networks, products made of PVC and polyethylene without reinforcement or reinforcement are suitable. Preparation requires creating a diagram of the future water supply indicating the lengths of the branches, its position and all the fittings necessary for installing the structure. Correct calculation of the lengths and number of bends will simplify the technology, increase the speed of task completion and prevent rework.

Soldering iron

Pipe cutter

To solder polyethylene connections you will need:

Soldering iron.
Pipe cutter
A trimmer for cutting pipes and trimming the edges of cut ends.
Fine sandpaper for cleaning edges
Connecting coupling (if coupling assembly)

The heating device is a special device with a sole with special nozzles of various diameters attached to it. There are devices that include two or more attachments at the same time.

The stages of technology for laying hydraulic communications will tell you how to learn to solder:

We measure the required length with a tape measure.
Use a pipe cutter to cut the measured length.
Trim the cut ends. This important stage when soldering. The cuts must be smoothly sanded and cleaned. To be more sure, you can additionally degrease it with an alcohol solution.
We solder the ends. If a coupling connection is used when installing life support networks, then we install a coupling/fitting at one end of the structure and heat it together with the future return in a soldering iron nozzle of the required diameter. After warming up, immediately connect the ends and wait for the assembly to cool completely. The quality of welding is indicated by the presence of a shoulder.

Attention! When installing heat and water supply using a soldered seam, it is strictly forbidden for water or moisture to fall into the cavity or onto the surface. When heated, water, turning into steam, deforms the plastic structure, as a result of which it loses its strength.

What to pay attention to

Temperature conditions for soldering are described in the instructions for the tool. On modern products An automatic heating mode is set depending on the size of the mounted network and the welding depth. On previous brands, the heating strength was selected manually.

At what temperature should plastic pipes be soldered? When soldering polyethylene risers, we set the temperature regulator at around 220 ° C, for polypropylene risers - 260 ° C. There is an indicator on the heating mechanism that shows the device is ready for use. The indicator lights up only in heating mode.

The duration of soldering depends on the circumferential radius of the pipeline, and can range from 5 to 40 seconds. The ends should not be overheated. This can cause a blockage to form at the adhesion site.

If you need to install a water supply of the same size, you should not overpay for the number of nozzles and the presence of a temperature mechanism.

If you plan a large volume of long-term production using networks of various sizes around the circumference, then we purchase a universal device for connecting to the latter technical capabilities and characteristics.

Soldering nuances

Knowing the technology for connecting autonomous communications is not enough. For quality installation you need to know a number of features of laying and soldering housing branches. How to solder plastic pipes correctly? To ensure professional assembly of technological buildings, it is necessary to remember some connection nuances:

A warm-up time is provided for soldering assembly. This time ranges from 5 to 20 minutes.
The production of in-house life support should be carried out at temperatures above zero.
After soldering the ends, it is necessary to prevent them from scrolling or moving; it is enough to smoothly eliminate distortions. You need to let them cool. Turning the weld seam may cause a leak in the future. It takes the same amount of time to cool down as it does to solder it.
Required power soldering tool – 1200 W.
Home soldering irons are designed for soldering wires with a diameter of up to 32 cm. If you need to assemble products large diameter, then we buy professional device for soldering.
Between the edge of the pipeline and internal thread there should be no gaps in the fitting. Gaps may leak when high blood pressure water. Excessive force when compressing elements can lead to a decrease in the clearance in the cavity and impair the performance of the entire structure.
Residues of material from the nozzles should be removed after each pack produced. Since the nozzles have a special coating, carbon deposits should be removed wooden device so as not to damage the integrity of the surface. Scratches on the surface of the nozzle will worsen technological characteristics the device and will render it unusable for further use.

Thinking about how to make heating?

Installation of heat supply has a number of difficulties. Heating models can be installed in rooms with low temperatures, which complicates the soldering process. For heat supply, systems are developed depending on the temperature of the water supplied to the system and the operating pressure. The use of plastic in construction has increased productivity and reduced construction costs. required material.

Heating pipes are reinforced with fiberglass, which makes this material strong and durable.

Health protection and working conditions

When carrying out work related to heating heating main joints, we follow safety rules to prevent injuries and burns:

We solder using special protective gloves.
We monitor the cleanliness of the floor in the room. Dirt will negatively affect welding quality and appearance the entire structure.
The soldering iron is installed on a flat horizontal surface.
It is necessary to start working after the device has completely warmed up and after the readiness indicator has turned off.
We don’t turn off the flashlight electrical network throughout the installation.

Soldering plastic pipes with your own hands is not difficult. The soldering process does not require professional skills or experience. Install life support networks in own home everyone can. The mandatory composition of the required tool includes only a soldering device. Rest auxiliary tools can be replaced with improvised means, a pipe cutter - sharp knife. A pipeline made of polyethylene structures and PVC is a reliable, durable and environmentally friendly system for supplying water and heating.

Good day, dear reader! Assembly or repair of heating, water supply, sewerage systems from modern species The production of polymer products is carried out easily and quickly, thanks to the sealing technology used to connect parts. You can do this work yourself if you know and prepare in advance necessary tools and devices.

You can solder the following types pipes

polyvinyl chloride (PVC);
polypropylene;
copper pipes;
polybutene;
made of polyethylene with increased heat resistance;
reinforced plastic products.

Necessary tools and materials for soldering

To work at home, you will need to prepare in advance all the necessary tools and materials:

electric soldering iron;
nozzles and stands for a soldering iron of the appropriate size;
a file or sharp knife for removing burrs;
measuring ruler or tape measure;
marker;
pipe cutting scissors;
shaver - a device for removing the reinforcing layer;
special tool for chamfering;
solder for soldering;
fluxes and fittings;
alcohol composition for degreasing.

Solder for soldering

Solder comes in the form of wire, foil, rod, etc. It is necessary to obtain a stronger weld on copper structures. It is made on the basis of tin, silver, zinc, lead, antimony or copper.

Depending on the melting point it is divided into:

fusible;
medium fusible;
high fusible solder.

Fluxes and fittings

Fluxes are used in soldering to protect the parts being joined. metal surfaces from oxidation. They are available in liquid, dry mix or paste form and vary in chemical composition, properties and purpose. For example, to clean the surface of rolled copper and increase the fluidity of solder, it is used boric acid, zinc chloride, hydrochloric acid.

A protective film can be created using rosin, wax, and various resins.

Fittings are small size products placed on the ends of pipes that are connected by soldering. These include couplings, tees, crosses, contours, plugs, corners, etc. They must be made of the same material as the pipes themselves. And of course, it’s no secret that you can buy fittings at any plumbing store.

Cutting scissors

This type of tool has other names - pipe cutter, pipe shears or. It is designed for fast cutting of plastic products, providing a burr-free cutting edge, which simplifies preparation for the welding process.

There are 4 types of pipe shears, differing in design and price:

precision pipe cutter with ratchet mechanism. The device is used for cutting pipes with a diameter of no more than 75 mm;
roller shears;
automatic pipe cutter in the shape of a pistol;
pipe cutter - guillotine.

Tips for choosing and using a pipe soldering iron

Its technical parameters should be taken into account:

power. Powerful devices needed for welding large-diameter pipes; for domestic systems in which the diameter of the products does not exceed 50 mm, you can purchase a device with a power of 0.6 - 0.8 kW;
quality of coating of nozzles and technology of their use. The products to be welded can be easily removed from Teflon-coated nozzles, so it is advisable to choose a soldering iron equipped with just such nozzles. In addition, you should pay attention to the possibility of heating not only one, but two or three nozzles at the same time. This will significantly speed up the work;
type of temperature controller. The soldering iron can be equipped with an electronic, capillary or bimetallic thermostat. It is better to choose a model with electronic regulator temperature, since the other two have too large a discrepancy between the set and actual heating temperature of the products.

The essence of the process and soldering methods

Soldering is used for hermetically connecting pipeline sections to each other, installing shut-off valves, instrumentation and safety devices.

For connecting the ends of pipes and pipes pipeline fittings Three soldering technologies are used:

diffusion method. Welding is carried out by heating and squeezing the connecting elements without melting the base material of the parts and the use of additional substances;
soldering using electrical fittings. For connection, special fittings with heating element. The soldering process occurs due to partial melting of the internal part of the electrical fitting under the influence of electric current;
cold way. The heat pipe elements are connected using additional material- solder.

Step-by-step instructions for soldering plastic pipes

It consists of three main phases - heating, docking, fixing and cooling of elements, the implementation of which requires certain preparation, compliance with temperature conditions and safety rules.

Security measures

During the soldering process, you need to follow basic safety precautions for working with power tools:

the soldering iron must be protected from precipitation, dirt and splashes;
Before connecting the device to the network, you must make sure that it is in working order and that the power cord and plug are intact;
During work, you should ventilate the room and use thermal gloves;
don't touch open areas skin to heated surfaces.

Preparation of elements and parts

At this stage you need to do:

cutting products into pieces of the required length;
cleaning the cuts from burrs and thoroughly polishing them;
degreasing the sections with an alcohol solution;
drawing a notch by which it will be possible to control the depth of insertion of pipes into the apparatus;

Preparing the soldering iron

The device must be connected to the network in advance, the thermostat must be set to the desired position and the product must be heated to operating temperatures, depending on the type of plastic.

Typically, the heating time of the soldering iron is 30 minutes until the light goes out. The device will be ready for operation 10 minutes after reaching the set temperature.

When preparing the apparatus, it is also advisable to additionally control the temperature of the fittings and sleeves with a surface electric thermometer.

At what temperature should plastic pipes be soldered?

For soldering polyethylene products, the temperature regulator on the device is set to 220ºС, for polypropylene products - to 260ºС. If there is no regulator, you can adhere to the heating parameters of the parts from Table 1.

Table 1.

Docking rules

When assembling joints, it is necessary to ensure that the edges are aligned so that the surfaces of both products coincide and the axis of the pipeline does not shift. The gap between the edges should be uniform over the entire diameter with a size of 2 - 3 mm.

Pipe connection

The heated parts are removed from the soldering iron nozzles and connected to each other, lightly pressing with their ends. The polymer will harden in 2-3 minutes.

Cleaning and cooling connections

The connection point must remain stationary until the plastic cools to a temperature of 38 - 42 degrees. To do this, the connected parts are fixed in a clamp or clip until cooling.

Cleaning of the deposits is carried out with a sharp knife after the joint area has completely cooled.

Checking the connection quality

Upon completion of welding, all joints must be visual inspection. A high-quality weld should have a smooth surface, without traces of porosity, cracks, folds and excessive shine that occur when overheated. The bead in the weld area must be continuous and uniform along the entire circumference of the joint and rise above the outer surface by no more than 2 mm - for products with a wall thickness of up to 10 mm.

The maximum bead height for pipes with larger wall thicknesses is 4 mm.

Soldering video

How to solder a pipeline on a wall can be seen in the video:

Common mistakes

Soldering plastic pipes does not require special skills, but if you do not adhere to established standards and the rules, it is still possible to ruin the connection. Typical mistakes novice masters are:

using dirty attachments. If drops of molten polymer remain on the nozzles, then during the next welding they can wedge between the edges of the products and sharply weaken the connecting seam;
residual water and dirt on outer surface. They will prevent close contact of the surfaces of parts over the entire area;
applying excessive force when combining parts. Part of the melt at excess pressure can be squeezed inside the pipe and reduce its permeability;
an attempt to clean up the sagging of molten plastic before the joint has completely cooled, which inevitably leads to deformation of the pipe;
insufficient heating or overheating of the joint.

To ensure maximum reliability of pipeline connections, experts advise adhering to the following requirements:

start right welding work 10 minutes after the soldering iron warms up;
perform welding or soldering operations only at above-zero ambient temperatures;
sections of pipes connected by welding must be allowed to cool, preventing them from moving relative to each other or twisting;
For wall thicknesses greater than 6 mm, butt welding of products is performed using a double seam. With a smaller wall thickness, the joint can be sealed with one seam;
all structural elements fixed by soldering must be from the same manufacturer, since they may differ in the composition of the ingredients in the raw materials, which will negatively affect the quality of the weld.

Soldering in hard-to-reach places and corners

When soldering pipes located in hard to reach places, for example, close to the surface of walls or ceilings, a special technique is used, which consists of sequential heating of the direct and mating sections of the connection with a soldering machine. It is necessary to warm up the flange of the straight section for a longer period of time so that it does not have time to cool down while the counter part of the workpiece is in operation.

A smooth line at corner joints of pipes can be achieved by using special corner adapters and fittings. In this case, it is important to very accurately mark in advance on the supply pipes the depth of their entry into the body of the corner piece.

Connecting plastic pipes without soldering

Plastic pipes do not have to be welded; they can be joined using a special adhesive. It is applied to the entire pre-degreased surface of the pipe section that will be inserted into the socket. In the bell, the inner surface is also degreased and covered with glue, but only 2/3. For better adhesion, the surfaces of the pipes under the adhesive joint are treated with sandpaper before degreasing.

The prepared part of the pipe is inserted into the socket until it stops and rotated 90 degrees. In this position, the parts to be glued should be held for 1 - 1.5 minutes until the glue sets.

The adhesive will dry completely within a few hours.

Plastic sewer pipes leading to the Tank septic tank can be connected using compression fitting. With this method, the process of connecting pipes consists of the following steps:

cleaning the top layer of the pipe from contaminants;
chamfering at the end;
loosening the union nut on the fitting and installing the end of the pipe into it;
tightening the nut in the reverse position, at this moment the pipe is clamped (compressed) by the ferrule ring.

Fittings are fixed manually or using an open-end wrench. The applied force should not be excessive, otherwise the pipes may burst.

The socket method involves the use of a highly elastic sealing ring. The tightness of the connection is ensured by compression of the gasket between the walls of the socket and the smooth end of the pipe.

Welding large diameter plastic pipes

To connect pipes with a diameter of more than 50 mm and a wall thickness of 4 mm or more, butt soldering technology is used, which consists of simultaneously welding the ends of 2 segments along the entire plane. The most difficult thing in this welding method is to correctly align the joints and ensure the required length of the gap between the parts.