Soldering iron diagram for polypropylene pipes. How to choose a soldering iron for plastic pipes. Soldering iron for soldering polypropylene pipes: price. Soldering equipment design

Choosing a soldering iron for polypropylene pipes

Polypropylene pipes today have almost completely replaced the previously used metal pipes. However, if the latter were connected exclusively through threaded connections, today special equipment and tools are used to connect plastic parts. One of them is a soldering iron for polypropylene pipes (it is sometimes called an iron).

This device is especially popular among craftsmen who independently install heating systems and plumbing without assistance. specialized companies. What characterizes this popular instrument today?

Types of soldering irons

The design of the machine for soldering polypropylene pipes is quite simple. It consists of a heating element that transfers heat metal plate having holes for nozzles.

The main task of the soldering iron is to maintain the desired temperature at a constant level. The main difference between these devices is the method of attaching the nozzle to the heating surface.

In Russia, sword-shaped soldering irons and corresponding nozzle designs are more common. This is due to the relatively low price and large assortment. However, among professional tools increasingly you can find cylindrical heating devices.

Soldering iron for soldering sword-shaped polypropylene pipes

Another main criterion when choosing a soldering iron is constant temperature. The reliability of the pipe connection depends on this characteristic. On sale you can usually see a whole set for soldering pipes. It includes the soldering iron itself, several attachments, and sometimes the kit is supplemented with scissors for cutting pipes.

Soldering iron power for polypropylene pipes

The heating speed depends on its value. All tools of this kind are designed to use a 220 volt network. For installing pipes at home, a soldering iron with a power of 700 to 1200 watts is suitable.

The minimum power is sufficient for soldering pipes with a diameter of 16-63 mm. When connecting pipes with a diameter of 75 mm, you will need a soldering iron with an output of at least 850 W. And 1.2 kW must be used when soldering products with a diameter of up to 125 mm. In any case, if you are connecting yourself, you will need a soldering iron for soldering polypropylene pipes with a power of no more than 1.5 kW.

Any soldering machine is equipped with a thermostat located directly on the body.

The optimal temperature for soldering is +260C. At a lower temperature, the pipe fits into the nozzle for too long and too tightly, which does not ensure a good connection between the fitting and the pipe.

The thermostat automatically turns off the tool when the set temperature is reached (this is indicated by a light bulb or LED).

Iron attachments

Most efficient use soldering iron is possible only if several attachments are installed on it at the same time. And indeed, change them when the soldering iron is hot #8212; a very dubious pleasure. Available nozzles for soldering irons of polypropylene pipes allow you to connect products of different diameters.

Welding machine complete with nozzles

In the manufacture of nozzles, various coatings are used to increase their strength and durability. Most often this is Teflon (or metallized Teflon, which is a more durable option).

To extend their service life, before starting soldering, be sure to remove any melt residue remaining from previous work.

Cost of the device and fittings

All manufacturers recommend using a soldering iron for plastic pipes with a diameter of 16-63 mm, with a power of 680 W. If it is necessary to connect pipes with a diameter of up to 75 mm, then the power should be greater - up to 850 W. When working with large diameters, up to approximately 125 mm, experts recommend using soldering irons with a power of 1200 W.

Soldering iron attachments

Soldering iron attachments for pipes. The size of the nozzle depends on the diameter of the plastic pipe

As a rule, when connecting polypropylene pipes in large volumes, ready-made blocks are attached. But this is not always beneficial for the home; there may be a need to install just a few separate pipes, so when choosing a soldering iron specifically for home use It is necessary to pay attention to the presence of all attachments.

You also need to pay attention to the material of manufacture; it can be metallized Teflon or regular Teflon. At the same time, the first one is higher, it requires a careful, careful attitude. They must be wiped before use. isopropyl alcohol.

Temperature level adjustment

When choosing a soldering iron for installing plastic polypropylene pipes, you need to pay close attention to the ability to adjust the temperature level. Adjustment accuracy from one to five degrees can be achieved using only a professional soldering iron, but it will be needed when the volume of work is very large. At home, you can often get by with cheaper models, but you should still choose them carefully.

The temperature when connecting parts should not be equal to or greater than 270 degrees, since at this value the thermal degradation of polypropylene pipes begins. Optimal value is to support a temperature value of 260 degrees, so when choosing, make sure that the rhythm of the difference is not too large.

When choosing, remember that attention should be paid to the temperature not on the soldering iron regulator, but on the nozzle. Experts recommend purchasing an additional special thermometer, which will allow you to accurately determine the temperature value so that the soldering is of high quality and the pipe itself is not damaged. In addition, modern instrument models have sound alarm: When a certain value is reached, an alarm will sound. Such devices allow you to monitor the condition in three modes (for heating, for connecting polypropylene pipes, for fixing).

When buying a soldering iron for plastic pipes, you need to pay attention to every little detail, since the quality of installation and the pipe itself often depends on them. A soldering iron for plastic pipes must not only be reliable, but also have the ability to control temperature, be easy to use, and have all the necessary attachments.

Soldering iron for plastic pipes

Quite often, when carrying out repairs or during the construction of buildings, it is necessary to carry out pipelines. Modern technologies allow the use of plastic pipes in almost all communications. made from durable polymers. Water supply plastic pipes, despite their high strength, have a low price, are not afraid of corrosion and do not become overgrown inside with deposits of salts and lime.

Hot and cold water supply in the apartment, laying water supply on summer cottage and installation of pipelines when installing heating systems - plastic pipes are used everywhere. Special soldering irons are used to work with polymer pipes. which perform heating of pipes and other pipeline elements (angles, tees, crosses). The connected heated parts of the pipeline are soldered into a single whole and do not allow water to pass through, which is what is required from the plumbing or heating system.

A soldering iron for plastic pipes is sold in almost any hardware or construction store. Their cost is relatively low, especially when you compare their price and the cost of work on laying water lines in an apartment or house, which the craftsmen will require from you. Of course, if you need to add a tee to install a washing machine, then there is no point in purchasing a soldering iron - it’s easier to call a mechanic from the housing office. But if the renovation of an apartment or house is major, then a soldering iron for plastic pipes will pay for itself quite quickly.

The principle of operation of a soldering iron for plastic pipes is simple - inside it there is a heating element, which heats up from a voltage of 220 V, and from it the nozzles for pipes and other elements heat up. The nozzles, which are sold as a set along with the soldering iron, have a diameter of #189; up to 2 inches and allow you to perform necessary work with various pipes. The nozzles are screwed onto the soldering iron from different sides, which allows you to simultaneously heat the pipe from the outside, and connecting element from the inside.

However, it is best to work with a soldering iron with a partner, when one holds the soldering iron, and the second heats up the necessary sections of the pipeline. But if there is no partner, then you can do it yourself, but this will require skill and work gloves - so as not to get burned. Special scissors are included with the soldering iron. which allow high-quality cutting of plastic pipes of various sizes. Of course, you can cut the pipe with a hacksaw, but scissors will do it much faster.

When buying a soldering iron for plastic pipes, you need to pay attention to the presence of a rheostat on the soldering iron, which serves as a temperature regulator. At the maximum temperature level, a soldering iron when turned on will not only generate extra kilowatts for you, but can also unnecessarily melt plastic pipes. This usually happens in hard-to-reach places, where it is not possible to work comfortably and excessive use of a soldering iron strongly melts the pipe or the joining element (tee, angle, cross, joining barrels). During operation, it is better to regulate the set temperature than to redo a certain section of the pipeline several times.

Of course, when carrying out repair work Other power tools will also be required. and the tools. But a soldering iron for polymer pipes will come in very handy when carrying out plumbing work or installing a heating system.

Welding machines for plastic pipes

Are you looking for where to buy a soldering iron for plastic pipes inexpensively in Moscow? We're cheap!

In this catalog you will find a soldering iron for plastic pipes, characterized by excellent functional and technical characteristics. The presented equipment corresponds to the most modern requirements for equipment of this class, has proven itself excellently in practice and is used in great demand in Moscow and throughout Russia in general. Indeed, the soldering irons for plastic pipes presented in the catalog are designed taking into account many years of experience in operating pipe welding equipment in practice. The developers have made every effort to ensure that each soldering iron for plastic pipes meets the requirements for it and gives excellent results when using it. If we evaluate the characteristics of the proposed models, we can note that the soldering irons have a wide welding range, are easy to use, light in weight and economical in operation. All this allows you to successfully use this equipment for performing work on welding plastic pipes. An additional advantage of the presented models of soldering irons is their small sizes and the availability of a variety of attachments for pipe welding work various diameters.

According to reviews of experts working in the market for equipment of this class, in terms of price/quality ratio, these models are among the best on the market. You can take advantage of the offered equipment right now by choosing the soldering iron for plastic pipes you are interested in and placing an order from our company.

We offer affordable prices

The most important advantage of our company is the affordable price of the supplied equipment. We supply soldering irons directly from the manufacturer, which means that you will not overpay to intermediaries and will receive a high-quality product at an affordable price. In addition, well-functioning and modern supply logistics can significantly reduce the costs of delivery and storage of equipment; all this, naturally, allows us to offer equipment in Moscow at lower prices than on the market. If you want to buy high quality soldering iron for plastic pipes at an affordable price, our offer is one of the best in Moscow.

We offer a long warranty period

Experts know how important it is for the equipment to be reliable and return the investment on it. The models presented in the catalog have been checked and tested at the factory, developed taking into account operating experience, and are also made of quality materials. This ensures a long service life and gives great guarantee period for each product. If you are looking for equipment with a long warranty period and reliable operation, take advantage of our offer.

We give free consultation on the selection and operation of equipment

Situations often arise when customers do not know which soldering iron for plastic pipes is best to buy, they need Additional Information and consultation. To simplify the process of choosing the model you are interested in, we offer a free consultation related to the choice of a soldering iron, the features of its use in practice, etc. Take advantage of this unique opportunity to ask questions to experts and make right choice.

Section tags: buy soldering iron for plastic pipes, soldering iron for plastic pipes price

DIY soldering iron for polypropylene pipes.

Description:
To solder summer water pipes, buying a soldering iron for 1,500 rubles is somehow expensive. I found this way out of the situation.

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Polypropylene products are very popular among consumers, and this is due to their technical indicators and ease of installation. As practice has shown, having a soldering iron for polypropylene pipes, even a novice plumber will be able to install water supply into the house or replace metal pipes heating circuit to plastic ones. The main thing is to choose the right tool and attachments for it.

Types of devices

At its core, a device for soldering polypropylene pipes is a heating device capable of heating up to a temperature of +270°C. Its main function is to heat polypropylene pipes and fittings made from the same material until they melt easily. During this process, their walls are tightly soldered, and upon cooling they become one, which provides an extremely reliable type of connection.

The soldering iron circuit for polypropylene pipes is extremely simple. It is based on:

• Housing mounted on a stable stand.
• Inside the device there are heating device and electrical parts that provide it with heating.
• The heating part of the body is equipped with special holes onto which nozzles are attached.

Principle of operation of this instrument for soldering polypropylene pipes is based on the fact that electrical parts, when heated, transfer their heat to the entire surface. This, in turn, heats the nozzles onto which the pipe section and fitting are placed. As a rule, the required temperature of the soldering iron for polypropylene pipes is set on the thermostat. Once it is reached, the device turns off until it cools down by 2-4°C, and then the heating process begins again.

How to choose a soldering iron

The choice of soldering iron for polypropylene pipes directly depends on the type work surface. There are two types of devices:

1. The working surface has a cylindrical shape, and the attachments are simply put on it like clamps. Craftsmen recommend using a similar device when soldering is required in hard-to-reach places, since the nozzles for polypropylene pipes are put on the very end of the heating element.
2. The heating surface has a flat shape, reminiscent of an iron. There are holes in it into which nozzles are inserted.

When deciding how to choose a soldering iron for polypropylene pipes, you need to rely on the type of work that it must perform. There is no big difference in the principle of their operation, you just need to pay attention to the power of the device, since it is this that indicates what diameter of pipes this device can work with.

Sometimes consumers believe that the more powerful the tool for soldering polypropylene pipes, the better. It won’t be superfluous, of course, but why overpay if you need a device for connecting small-diameter pipes when wiring household communications. According to thermal power, they are distinguished:

• Soldering iron for polypropylene pipes with a power of 680 - 700 W, suitable for products with a diameter from 16 mm to 63 mm.
• Devices with an indicator of 850 W are suitable for pipelines with a diameter from 16 mm to 75 mm.
• A soldering iron with parameters of 1200 W works with pipes with a diameter of 125 mm.

As a rule, pipes with a diameter higher than 50 mm are rarely used in household communications, so it is quite possible to get by with a device for soldering polypropylene pipes with a thermal power of 700 W.

If you have to carry out the work yourself, then as manufacturers you can choose tools made in Russia or China, since they are the cheapest. As experts say, they are able to connect 2-3 pipelines when laying household communications.

For large volumes of work, Turkish-made devices are better suited; they are slightly more expensive, but have higher productivity.

When you need a professional soldering iron for polypropylene pipes, it is better to give preference to products from Europe.

Auxiliary elements for a soldering iron

As a rule, several attachments are included with this tool, but if necessary, they can be purchased separately.

The kit for soldering polypropylene pipes includes 3 elements of the most common diameters - 20 mm, 25 mm and 32 mm. There are also more expensive kits on sale, which contain not only nozzles of different diameters, but also a knife for cutting polypropylene pipes, a tape measure and gloves.

Teflon nozzles for polypropylene pipes are actually made of aluminum alloy, while more expensive versions are made of copper, and only have a Teflon coating. This layer protects the nozzle from softened polypropylene sticking to it. The thicker it is, the more expensive the product, and the longer it will last.

When choosing nozzles, you should not skimp on them. If the Teflon layer is too thin, then it will be able to make only a few solders, after which polypropylene will stick to its surface, and the pipe and fitting will be extremely difficult to pull out.

Thermostat value

Without this element, a soldering machine for polypropylene pipes would not be able to perform its job efficiently. This is due to the fact that for each pipe diameter and the thickness of its walls there is a specific heating time for the device. If you do not adhere to it, then either the polypropylene will melt or will not be heated enough to be properly welded to the fitting.

The table below shows what time needs to be entered into the thermostat for soldering iron polypropylene pipes:

This is the heating time for work at air temperatures of +15°C and above. If the air is colder, then the heating parameters need to be increased by 2-4 seconds. At temperatures below +5°C, working with polypropylene is generally prohibited.

By entering these parameters into the thermostat, you can be sure that the soldering will be done correctly. The device will turn off at the right time and heat up again when it cools down.

Conclusion

There is nothing complicated about how to use a soldering iron for polypropylene pipes:

• Prepare the pipes, why they need to be cut special knife, and degrease the sections with alcohol. The same treatment must be carried out with the fittings, wiping the inside of the wall with an alcohol solution.
• Attach nozzles of the required diameter to the iron for soldering polypropylene pipes, pull the end of the polypropylene pipe onto one of them (it is slightly larger), and the fitting onto the other.
• Plug in the device and wait until it heats up to a temperature of 260°C.
• After waiting the time indicated in the table, the pipe and fitting are removed, firmly soldered to each other.

As a rule, the instructions for a polypropylene pipe soldering iron provide a complete explanation of how to use it and what precautions should be taken when working with it.

Until recently, a conventional welding machine was used to form connections in pipelines. In some cases, plumbers limited themselves to threaded fasteners, but this method does not solve all problems. The use of traditional welding is determined by the pipe material itself - stainless steel, cast iron, copper, etc. However, the widespread use of plastic models has forced us to turn to new types of soldering, the creation of which uses a special apparatus.

Types of soldering

Before you go buy a soldering iron, you need to know what types of welding operations it will need to perform. So, there is coupling soldering, socket connection and butt technology. The coupling method provides the highest quality and most durable results. The disadvantages of this technology include its limited application: it is not capable of serving a full welding process, which is why it is used in combination with socket soldering. Separately, sleeve welding can be implemented in the repair of pipelines.

Socket welding allows you to connect pipes with a diameter of up to 4.9 cm. During the operation, a soldering iron for plastic pipes heats the couplings and polypropylene to the desired degree, after which the molten edges are set. The butt technique makes it possible to make connections in pipes with a diameter of more than 5 cm. It also requires the presence of a centering device in the apparatus. In order to ensure sufficient compression force, mechanical drives of the device are used.

General design of soldering irons

Almost all machines for soldering polypropylene pipes are equipped with a heating element and a thermostat, through which the degree of heating is regulated. Depending on the nature of use, a soldering iron for soldering plastic pipes may have special attachments. They are typically required for fittings and couplings, so select an appropriately sized accessory component before welding. Heating plates are usually designed to hold up to three interchangeable attachments at a time. The operation of the devices is provided by a 220 V network.

Classification by operating principle

Models for making coupling connections involve the use of fittings with a spiral. The heated working element melts the edges of the pipe, as a result of which the plastic changes in density. Coupled soldering iron for plastic pipes in latest versions equipped with electronic filling, which allows you to monitor the properties of materials and ensure high precision welding. Devices for bells are distinguished by the presence of special holes for diametrical nozzles. In terms of functionality, such models resemble an iron.

There are also soldering irons with hydraulic and mechanical drives. In the first case, the devices automatically connect the melted ends - the pipe convergence zones are smooth and sealed. Mechanical drive provides hand soldering. Such models have the simplest design, including a trimmer and two heating elements.

Welding process

First, nozzles should be installed on the soldering iron for plastic pipes - they are easily inserted into special grooves. The following is a simple procedure. The working plates heat up, after which, as a result of contact with the future joints in the pipes, the plastic begins to melt. All that remains is to connect the two sides so that the joint is as smooth as possible - that is, the axes of the pipes must be on the same plane. For greater accuracy, it is recommended that two people perform the procedure: one holds the elements to be joined, and the second directly performs the welding. It is important to remember that the formed seam does not imply dismantling.

Selecting a soldering iron by power

Employees of utility services and specialized organizations usually have a soldering iron for plastic pipes with an average power of 2 kW in their arsenal. Such devices are suitable for connecting pipes with a diameter of 10-15 cm, but their capabilities are not needed in everyday life. For private craftsmen who plan to solder pipes with diameters of 1.5-6 cm, it is advisable to choose devices with a power of 600-800 watts. For pipes whose circumference exceeds 7 cm, it is worth purchasing a model with a power of 800 W or more. And so on in increasing order.

Today there are models for both 1.2 kW and 1.5 kW, but their purchase is justified only when working with large diameters. To models medium power For example, the Proton 1200 series soldering iron for plastic pipes is capable of heating the material up to 300 °C in just 12 minutes.

Soldering iron attachments

The standard set of soldering irons for plastic pipes contains a basic set of nozzles, but can also be supplemented with special components. It is important to note that the nozzles are supplied in pairs in each diameter - for simultaneous work with two pipes of the same size. Manufacturers use Teflon as a material for nozzles - there are regular and metallized options. If large volumes of soldering or regular welding operations are planned, then metallized versions should be preferred. Their cost is higher, but the quality of the connection will ensure a longer service life of the pipeline.

Manufacturers and prices

The soldering iron segment on the Russian market is diverse, but only a few brands enjoy stable success. Foreign brands are represented mainly by Czech and Turkish manufacturers. In the line of the Eastern European brand Dytron you can find a high-quality soldering iron for plastic pipes, the price of which is 5-7 thousand rubles. At the same time, it will have wide functionality and rich equipment. But this applies to “home” versions - professional ones cost about 10 thousand. Turkish Candan models are budget and are supplied in different options power up to 2400 W.

Domestic devices are no less in demand. These are primarily the “Proton” and “Temp” models. Their power varies from 600 to 2000 W, which allows you to find best option both for small-format soldering and for specialized work with large diameters. In terms of cost, a soldering iron for plastic pipes "Temp" is cheaper - for example, a device with a power of 1.5 kW can be purchased for 2.4 thousand. In this case, the kit will include nozzles and all the necessary accessories for soldering.

The welded connection of polypropylene pipes is characterized by higher reliability compared to other methods of combining products with each other. This connection technology does not have any differences when working with polypropylene. The only exception is reinforced products: their installation requires some specific features.

This technique is quite simple. Welding can be carried out in living conditions, observing the requirements of the technological process and having the entire arsenal of necessary tools.
There are several options for connecting polypropylene pipes:

• diffusion soldering;
• soldering with electrical fittings;
• cold welding.

In this article we will talk about each method of combining cylindrical products in more detail, consider their advantages and disadvantages, and also learn how to properly solder polypropylene pipes.

Before you begin, you need to prepare the installation tool. To create a reliable joint between the structures and all additional parts, you will need a special soldering iron.

It is worth noting that sometimes the connection of products made of polypropylene is called welding. However, this process has many varieties, so it is important to remember that polypropylene pipes are connected in only one way - soldering. For the installation of such a system, threaded fittings and metal-plastic are not used.

Soldering polypropylene pipes requires the use of welding machines. There are several types of devices on sale:

• heater with a round cross-section;
• flat unit.

The second type of soldering machine is popularly called an iron, which is largely due to its appearance. Such devices differ only in their design.

For the first model, Teflon nozzles are put on the heater and fixed with parts similar to clamps. In the second device, the same nozzles are screwed to the heater on both sides. The rest of the design elements are no different. The main function of the device is to perform high-quality and reliable soldering of polypropylene products.

The set of soldering devices must include nozzles. The most inexpensive device, the set of which includes a minimum number of elements, is considered to be a Chinese soldering iron. Its power does not exceed 800 W. It is presented for sale together with a stand, as well as attachments that allow soldering of PP pipes with a cross-section of 20-32 mm.

When the heating system of a private house is made of cylindrical products of this diameter, this kit will be quite sufficient. But if more is expected professional work soldering related problems, you'll need a better device.

For pipes with a cross-section of 40-63 mm, a different soldering kit is required. It will have to be purchased separately. The most expensive sets, characterized by increased reliability, are manufactured in large European countries. Their kit includes the following parts:

• soldering iron;
• stand;
• Teflon nozzles of different diameters;
• scissors that allow you to cut pipes at 90 degrees;
• hexagon;
• Phillips screwdriver;
• roulette;
• gloves.

Since you have to work with hot equipment to solder polypropylene pipes, you must wear gloves when performing the operation. Beginners often get burned when touching the heating element.

The design of any soldering iron is designed so that it is possible to install several nozzles at once for connecting small-diameter pipes, which saves time, especially when working with products with a cross-section of 20-40 mm.

Soldering machine power

To evenly and quickly heat a pipe with a diameter of 63 mm, greater system power is required. For domestic purposes, a device with a value that determines the amount of energy not exceeding 0.7-1 kW will be sufficient.

If the power of the iron is more than 1 kW, it becomes professional. Its cost is much higher than the price of an ordinary soldering iron.

Method one

For the manufacture of homemade soldering iron you will need:

• a broken old iron that still has a heating element;
• children's metal construction set;
• rubber handle;
• toggle switch;
• asbestos cord;
• duralumin;
• insulating tape.

Manufacturing technology

• use a grinder to cut off all unnecessary parts from the bottom of the iron;

• an aluminum cover is made;
• a box is assembled from the construction set; a light bulb and a rubber handle are installed in it;
• a toggle switch and a soldering iron regulator are connected to the wire;

• all parts are combined into one whole;
• cables are soldered;
• The heating element is bolted to the body, having previously placed an asbestos gasket.

Thus, after spending a little time using available material, you become the owner of a homemade soldering iron for welding PP pipes.

Method two

To make the tool you will need a pair of attachments costing 215 rubles. and a discarded, set fire iron. It takes approximately two hours to assemble.

First, the heating device is installed vertically. The fitting is placed on the heating nozzles simultaneously with the pipe. To make it possible to carry out operations on the wall, the iron needs to be slightly modernized: cut off the “sting” of the sole and slightly round it. It would be a good idea to use thermal paste.

It is known that such homemade device several pipelines were welded. The quality of work turned out to be quite high.

After heating the iron, holding it by the handle, remove the pipe first. There is no need to remove the fitting immediately, since its thickness prevents it from melting quickly. All that remains is to hold the pipe with the iron with your hand and remove the fitting.

To connect the products, you need to apply little force until an even flash is formed around the entire perimeter of the fastener.

You need to hold the connection in this position for about 15-20 seconds until polymerization begins. Welding on the wall is simple: hold the heating device with one hand, and the pipe with the other.

Method three

We manufacture an iron equipped with a temperature controller, which will act as a special power control device assembled on a thyristor. For soldering work, a voltage of 170V is supplied. Aluminum or copper plates are used to create the device. The photograph shows a part with a thickness of 0.8 mm, but the value of this value may vary upward.

Flat elements are needed so that the heater does not begin to cool the moment the pipe is put on. For operation, a heating element (1 kW) from an outdated Mechta stove is used. Since the radiator hardly heats up, it can be reduced. No spacers are required to install the thyristor and diode. The design of the iron itself can have any shape, it all depends on your imagination.

Below is power regulator circuit.

On each side of the spiral you can install aluminum spacers in the form of round pancakes. A handle with a regulator and a fixed toggle switch is attached to the body. In other words, you can do tuning.

The principle of all devices is always the same: to solder PP pipes, you need to maintain a certain temperature.

How to choose nozzles

When selecting heating nozzles, it is necessary to take into account the diameter of the pipes being connected and other important points:

• strength;
• how well the shape is retained after temperature changes;
• thermal conductivity.

Almost all welding machines are suitable for various attachments. This is very convenient when you need to install a complex highway.

Each wearable element has two ends. On one it heats up outer side details, on the other - its internal part. All nozzles are coated with Teflon, which protects the surface from the adhesion of molten material. The dimensions of the parts are in the range of 2-6 cm, which corresponds to the common diameters of cylindrical products.

Normal temperature for soldering

For durable welding of structures, the soldering temperature of polypropylene pipes should not exceed 260 °C. Otherwise, this will lead to loss of stability of the plastic base, as a result of which the pipe simply will not be able to connect to the fitting. Moreover, the heated connecting element will begin to stick to all the parts surrounding it. However, a lower temperature is also not suitable for soldering.

It is important to remember that the viscosity and plasticity of the polypropylene structure must have certain values, otherwise diffusion processes will not begin and the connection will lose its reliability. The service life of such pipelines will be minimal. You will have to forget about the 50-year warranty. It is better to look at the table at what temperature to connect the products.

Pipe soldering time

If you correctly comply with the technology requirements for the duration of the process of connecting structures using special tool, you can get a fairly tight joint. Polypropylene will not begin to spread after overheating. Heating time depends on certain parameters. The main ones are:

• pipe section;
• welding belt seam width;
• ambient temperature.

Below is a special table that shows the recommended soldering time for PP products, taking into account all the values ​​​​mentioned above:

Socket welding of polypropylene pipes

The main method of installing plastic, when it is necessary to connect small cylindrical products of different sections, is the use of a socket. When welding a PP structure, additional parts must be used:

• corners;
• tees;
• bends.

They are all made from the same material from which the pipes were made. Application additional elements to create a high-quality connection is not considered a disadvantage of this method. The parts in question, in addition to the connecting function, help change the direction of the pipeline.

This process consists of several operations:

• the mating surfaces are melted: the outer wall of the cylindrical product with internal part fitting;
• special heating parts are used;
• The assembled elements are cooled.

According to professionals, socket joints are considered much more reliable than butt welding. Due to the fact that when combined, the pipe enters the fitting with force, high strength is created. In this case, alignment does not require the use of a special tool. Even a beginner can combine cylindrical structures in this way.

Socket welding machine

Devices designed for connecting PP products into sockets are called soldering irons or irons. The main element of such a device was the heating head. All replacement parts are attached to it:

• couplings;
• dorns.

The first elements are designed to heat outer surface pipes, the second - the inside of the fittings. The shape of the heater in most soldering irons remains a triangular plate. Devices of other designs can be found on sale.

The size of the nozzles depends on the dimensions of the flat part. In other words, a pipe section is selected that will be freely soldered. In addition, you need to take care of the right amount heating couples for simultaneous installation. To work with a large plate you will need a powerful unit.

Additional parts (couplings, mandrels) must be secured so that their supporting surface tightly touches the plate.

With good contact, the desired temperature (260 °C) will be achieved. In this case, the power of the soldering iron does not matter much.

Today, devices are produced equipped with a heating head in the form of a rod. Their main advantage can be called compactness. On technical specifications The shape of the head does not affect it.

For quality work iron, the accuracy of the functioning of the temperature sensor that supports required temperature. If its fluctuations become minimal, this indicates high quality soldering iron

The most advanced to date are electronic thermostats. These thermistors are capable of displaying an accurate temperature value even on the working surface of the coupling.

The use of such parts makes it possible to reduce the temperature inertia of the iron. As a result, the true readings of the heating head will be displayed on the device scale.

Bimetallic relays work more roughly, as well as capillary thermostats, whose values ​​​​are inaccurate. If compared with the data from thermistors, the discrepancies will be quite large. Whatever the thermostat, when the device reaches operating mode (judging by the indicator data), you must wait a few minutes. During this time, the temperature of the nozzles will be compared with the one shown by the device.

Now you can start welding. Manufacturers also produce soldering irons that have two heating elements of different power. Each part is equipped with a separate switch.

These products are able to independently achieve the desired temperature. The master himself selects the required power.

The second part becomes a spare in case the first one fails.

The device provides the ability to simultaneously turn on both heaters in order to quickly achieve operating mode.

The equipment can be equipped with auxiliary tools, including:

• chamfer;
• calibrator;
• trimmer;
• pipe cutting scissors.

In some kits you can even find a special cleaning liquid. However, not all of the listed parts are included in the basic package. Often they have to be purchased separately. It is important that the welding machine comes with everything necessary tools for working with any pipe diameters and materials.

Technological process of socket welding

The outer diameter of a cylindrical product is always slightly larger than the nominal cross-section. The fitting, on the contrary, has an internal diameter less than the nominal cross-section of the pipeline.

Take, for example, a 20 mm pipe. The actual size of its outer diameter will be in the range of 20.3-20.5 mm. A fitting designed to work with a 20 mm product will have an internal cross-section of 19.5-19.7 mm.

Moreover, the middle part of the coupling surface will exactly correspond to the nominal diameter. For a conical plane, 5 degrees are taken.

It becomes clear that if the fittings are not heated, they will not be able to be connected to the coupling.

When the pipe is combined with a hot coupling, melting of the outer part occurs. All excess is squeezed out to the top, creating a kind of roller. Next, the inner layers are heated. They begin to compress, and the pipe is able to get into the hot sleeve. A similar effect can be achieved when the fastener element is connected to a hot mandrel.

When the pipe is combined with the fitting, it is elastically compressed, and the connecting element begins to stretch. Heated surfaces are compressed, displacing air. The result is uniform mixing of the molten material.

General technological process Connecting PP pipes into a socket has several sequential operations:

• cutting of products;
• preparatory activities;
• installation of a welding machine;
• achieving operating mode;
• warming up parts;
• assembly;
• line cooling.

Manually possible without special effort connect the pipe to a heated tool if small parts are welded, the cross-section of which is in the range of 40-50 mm. To combine cylindrical structures with a diameter exceeding 50 mm, you must use a special centralizer designed for socket welding.

Since soldering polypropylene pipes is not particularly difficult, the work can be done alone.

To cut cylindrical products, special scissors are used that do not allow the pipe walls to wrinkle.

Before starting to solder polypropylene products, the surfaces of the parts are thoroughly cleaned and degreased. Reinforced structures are subjected to special training. Workers installing such products must remember this.

Composite pipes made of PP, which are reinforced with aluminum, are characterized by low thermal expansion. Therefore, a heating system made from such products does not require the installation of additional temperature compensators. Only in such products reinforced with aluminum is oxygen diffusion possible. After air enters the system, the water is actively saturated with oxygen. As a result, the process of cavitation of valves, as well as other parts of the structure from cylindrical structures, begins.

In the absence of a reinforcing layer, there is no need to carry out additional special preparation.

Technological map for socket welding of polyethylene pipes

How to solder reinforced polypropylene pipes

In this case, contact of aluminum with liquid is strictly prohibited. This alloy begins to deteriorate, and buying new products is unprofitable. The appearance of small internal distortions in the joints is difficult to notice with the naked eye, however, it is these zones that are the weak point of the entire system. Here it is possible for water to get on the metal surface.

To prevent this, clean thoroughly reinforced layer. Such an operation is mandatory if the surface of the pipes is wrapped in foil.

For removing metal sheet used special device- the so-called shaver. It has to be purchased separately.

The end is inserted into the device, similar to sharpening a pencil, and they begin to turn.

When working, do not forget about cleaning the aluminum layer. Welding will occur without this procedure, but the reliability of the resulting connection will be quite low.

You can get rid of this human factor by installing fiberglass-reinforced pipes.

If the aluminum reinforcing layer is located in the center of the wall, the surface is trimmed using a special tool. It helps remove the edges of aluminum that cover the end of the pipe. If such an operation is not carried out, water can get into the center of the wall, moving along microcracks in the reinforcing layer, which will inevitably lead to swelling.

In the photograph you can see the soldered connections of the cuts: the incorrect execution in the picture without trimming and the correct one - with trimming.

To achieve the best results, special couplings are used. They seem to “brick up” the ends of the reinforcing layer, which helps to avoid contact of the metal with the liquid.

Some manufacturers give own recommendations how to prepare pipes before welding. Even if there is no reinforcing layer, it is necessary to calibrate the outer diameter and then remove the chamfer.

The sizing operation removes the ellipse of the pipe, making it completely round. The removed chamfer facilitates the work of connecting to the coupling. Unfortunately, when PP pipes are soldered independently, these operations are completely ignored.

How to prepare a soldering iron for use

First, the welding machine must be firmly secured. When heating begins, the parts are subjected to pressure, which is transferred to the soldering iron. To make it more convenient to work, it is important to ensure that the device remains stationary.

A heating couple is placed on the instrument. Next, the desired heating temperature is set and voltage is applied. When PP pipes are socket welded, the heating temperature should be within 260±10 °C, which exceeds the values ​​at which polypropylene becomes viscous and fluid.

In this way, the top layer of the pipe together with the fitting quickly melts. As a result, the part can be easily removed without heating the entire wall thickness. At a different temperature, when the elements become soft, the connection will not be possible.

We put the parts to warm up

When the welding machine reaches operating mode, the light will light up. The pipe is inserted into the coupling, and the fitting is inserted into the mandrel. If it is quite difficult to carry out such work at the same time, a heavy connecting element is installed first.

Welding parts necessarily have a small allowance, which begins to squeeze out during their installation. This creates a ring-shaped roller (burr). To move such a ring, you need to make some effort, but this should be done smoothly and slowly so that the burr becomes correct form. A fitting that fits loosely onto the mandrel and does not form an annular bead is considered defective.

When installing the part, be sure to monitor the installation depth. As soon as the element rests against the top of the mandrel, the pressure must be stopped, otherwise the end of the pipe can be damaged and the fitting stop can be dented. To control the depth of immersion of the part into the coupling, a corresponding mark is made at a certain distance from the end. However, this procedure is not necessary since the fitting is basically inserted into the mandrel until it touches the stop.

After the parts have been installed in the apparatus coupling and its mandrel, you need to wait a few seconds until the surfaces are well melted. It is important to determine the heating duration correctly. This time should be enough to obtain a viscous and fluid state of polypropylene.

If the heating period is too long, the parts will become very soft. Manufacturers of plastic pipes have developed special tables that indicate the heating time for a specific brand of polypropylene. In this case, the wall thickness and cross-section of the pipe are also taken into account.

When fittings are combined with cylindrical products, the angle of rotation of the parts should not exceed 5 degrees. If the joint is made correctly, the flash will have the same thickness on all sides.

Cooling the connection

If it is necessary to correct the work performed, the technology allows this to be done within a few seconds. The parts should not be subjected to any pressure until the material has completely hardened, which lasts approximately 2-4 minutes.

Approximate parameters for the duration of welding operations can be viewed in a special table. More exact values indicated by manufacturers of fittings and PP products.

When soldering PP products end-to-end, the ends of the parts are heated with a hot tool until they melt. Then the elements are pressed with force until the seam cools. This technology is distinguished by its simplicity.

In this case, there is no need to use additional devices. If everything is done correctly, the result is a fairly reliable seam, not inferior to the strength of the pipe. The technological operation is performed in a certain sequence:

For all its simplicity, butt welding only seems so accessible. In practice, this requires solving several problems, which is almost impossible to do in everyday conditions.

The pipes must align exactly along their axis, with only a 10% deviation from the wall thickness allowed. Pressure on parts pressing cylindrical products to the plane of the heating mirror when exposed to high temperature, should only be available for a certain time. This is the only way to achieve a high-quality connection. When performing trimming, it is necessary that the end has perfect perpendicularity.

The conditions listed above are quite difficult to follow without an additional device - a special centralizer. It is equipped with an electric drive that creates a certain compression force. In addition, this device is equipped with a trimmer.

In other words, to carry out butt welding of small-diameter polypropylene pipes, you will need a larger amount of special equipment compared to the previous joining method. Considering the fact that when socket welding, a better joint is obtained due to lock connection, home craftsmen prefer to use this particular method of combining pipes.

Butt welding of PP products is mainly used in production, when it is necessary to connect structures of large cross-section when installing a straight section engineering structure from cylindrical products.

Polypropylene pipes, due to their low cost and ease of connection, are used by many owners when installing water supply in an apartment or house. There are many tools for soldering pipes, but not everyone can afford them, so I made a soldering iron from an old electric iron.

On the “sole” of the iron (heating element) (photo 1, item 1) in a pre-drilled hole, using a bolt on both sides, I attached a heating element for the outer (7) and inner (see photo 2) diameters of the pipes. The heat-insulating casing (photo 1, item 2) and the temperature controller module (3), mounted on a textolite plate (4), were connected to the heating element and installed on a stand (5). PTFE insulators (6) were placed between the casing and the plate.

The aluminum stand securely holds the structure, and the protruding part of the textolite plate is freely inserted into its groove (8) and easily removed, which allows you to conveniently store the device. I attached the wooden handle with self-tapping screws to the textolite. The temperature controller module was assembled according to the diagram...

When installing a water pipeline, I turn on the soldering iron and set desired temperature. I insert 25 mm diameter pipes into the heating element on both sides for no more than 5 seconds, take them out and solder them together, connecting the heated ends.

Diagram of a homemade soldering iron for plastic pipes

1. Variable 500 kOhm (R 1)

2. Resistor 4.7 kOhm 0.5 w (R2)

3. Resistor 1 mOhm, 0.25 w(R3)

4. Dinistor DB-3(VS 1)

5. Triac TS 25-4 (VS 2)

6. Thermal electric heater 1000w(T3H)

7. Capacitor 0.1 uF, 400 v(C 1)

8. Neon lamp HL 1 (network indicator)

The temperature controller is mounted in aluminum housing measuring 130x60x90 mm on a board made of foil fiberglass. The control knob is located outside and has divisions. When the device is turned on, the red lamp lights up.

DIY soldering iron for plastic pipes - photo

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