Or the main sewage cannot be performed using a solid piece of material. To date, many methods have been developed, with which the connection of individual segments is made. The most advanced is the electrofold welding of pipes.

The essence of the method is that the connecting fitting has an electric spiral. It can be fully open, partially swallowed or hidden. The heating element has two outgoing contacts to which the welding machine is connected. At a given period of time, the specified voltage value is supplied. The inner part of the connector and the inserted segment of the pipe under the action of temperature goes into a liquid state. The outer wall is not warming up to such an extent and retains the elasticity, which causes the substance to move down, as a result of which the monolithic design is formed.

Couplings are made of three types of plastic: polyethylene, polypropylene, polybutene. For the installation of gas highways, only the first option is usually used.

Note! A marking is applied to fittings, which informs the operator about how voltage and at what period is served. Also indicates the cooling time of the finished joint. In addition, the design includes special indicators that signal the completed process.

This technological method carries a lot of positive parties:

• During welding, the inner diameter of pipes does not decrease. This means that it can be applied not only in cases where there is a pressure with constant pressure in the system. Drainage and storm systems will not be an exception.
• Thanks to a thought-out tool base, the human factor is minimized when performing all required operations.
• This method is more acceptable if you need to clutch two large diameter pipes.
• Elektromofold welding will be indispensable when the maintenance of the line is required, and shifting the pipes in the horizontal plane is not possible.
• An obstacle to the articulation will also be the case when both or one of the pipes are enhanced by reinforcing inclusions. With butt welding, there is no guarantee of such strength of the seam.
• Stitched polyethylene tubes are usually connected by a mechanical manner. ZN welding makes it possible to affect molecular ties, providing high-quality seams.
• Assembling the pipeline with a multitude of taps can be made directly at the place, without the need for a preliminary connection and installation of the finished design.
• Electrical savings compared to other types.
• The advantage of welding products from different grades of polyethylene, as well as various diameters.

In order for the whole process to be without a mark, you must have a specific tool with you:

• Welding machine. For this type of welding, a unique unit was developed. It is based on semiconductors technology, therefore consumes an order of magnitude less electricity than its other analogues. Typically, such aggregates indicate the maximum and minimum welded diameters. A barcode scanner is provided, which automatically enters data on the specific form of the connection, it can also be done manually. Data on each traveled junction is entered into memory so that the operator or control group can get information. Perhaps the presence of a built-in serial or USB port, you can connect a flash drive to the launch or data transfer. The front panel usually contains a display that displays current parameters. Included with some units there are tips of various sections.
• Positioner. A small metal device in the form of a plank that has several clips. This tool makes it possible to locate nozzles in one plane to perform welding. It is also intended to correct ovality. Separate claw can also be applied for these purposes.
• Truborez. Usually use disk. It is he who makes it possible to perform a smooth cut, which is a requirement.
• Scraper. Small handle with blade. It can also be a device with multiple modules. One of them is placed in the pipe, the second on which the cutting head is located, is connected and the top layer takes off when rotating. This procedure is not necessary in order to create a rough surface, but to remove the oxidized part of the nozzle.
• Roulette or ruler.
• Cleaner. It is necessary to remove dirt and fat. You need to use specially designed for a specific type of pipes. It is impossible to use ordinary alcohol or acetone.
• Marker. It uses waterproof white or bright color to apply not only marking, but also some data in the place of the spike.

Note! For sedlons, a special car, as well as a hex key and a screwdriver for retainers, is additionally used.

The spike process is not very complicated, but requires certain accuracy, attention and perfection.

• If there is time before work, it is desirable to straighten the pipe during the day, winding out of the bay, it will help partially correct ovality.
• The first thing to be done is to cut the edge of the pipe. For these purposes, it is possible, but undesirable, applying hacksaw. The end is derived. Use the disk pipeline, it will provide the correct plane.
• Next is the markup. It is necessary to apply the line to which the fitting will be put. From it to make a stock for another 1-2 cm and designate.
• Using a scraper or mechanical oxide cleaner, remove the top layer. For pipes, the diameter of which does not exceed 63 mm, it is 0.1 mm. If the outer diameter is greater, then you need to take 0.2 mm.
• Now the pipe is processed by a solvent and placed in a positioner. It needs to be well fixed and corrected ovality. The fitting should not be loaded on the break. The positioner must compensate for it.
• A coupling is worn (it should also be treated with a solution from the inside). If the diameter of the pipe is very large, then the coupling is stretched on its full size. The second nozzle is supplied and the fitting is knocked up to half of its depth. The mortgage spiral must be all its area on the pipe area to provide the right alloy.
• After connecting two pipes, the welding machine is connected. The necessary parameters of the scanner are read or are entered manually. The process starts. It is important to remember that the full cycle also includes the cooling time. If you replace the clamp ahead of time, then the tightness will be broken.
• When all tasks are completed, data and date data are applied to the connection, as well as the operator.
• The mounting of the saddle rush has a similar algorithm. Cleaning is made at the place of installation, but not throughout the circumference, but only the spike area, which will be blocked by a spiral. After stripping, a saddle is put on and firmly clamped. It is welded. Then with the help of an additional tool is performed. Using the plug, the technological hole is closed and the label is applied.

Note! To remove the oxide, do not use emery paper or unbelievable scrapers. You just scratch the surface, but do not achieve the desired result.

In some cases, the connection is deployed. This can be detected already upon completion of complete installation. This happens for the following reasons:

• The operator did not compensate for ovality. This can lead to the fact that the molten plastic will not fill all the space.
• Cleaning was not made with a scraper. The result will be that the coupling and the pipe do not form a monolithic spike.
• The pipe was at an angle to fitting. The consequence will flow liquid plastic.
• The fitting was not completely. The mortgage helix does not melt a sufficient amount of the articulated surface.
• No degreasing was made or after it, the cleaning site was touched by their hands. The connection will not be sealed.

This instruction is also applicable to connect PND pipes. This method is much better using fittings with a mechanical clamp that cannot provide perfect tightness.

Video

In the provided video materials showing the technological process of electrical welding of pipes:

Low pressure polyethylene in the rating of popularity among materials used to assemble pipelines occupies the primary positions. The secret of such a demand is easily explained by the universality of the use and simplicity of installation of polyethylene pipes.

But as when working with any other polymer, the high-quality installation of PND pipes can be performed only under the condition for strict technology compliance. We will tell which nuances to take into account, performing the pile of elements. Explain how to properly perform their flexion and straightening.

Technologically combined the PND pipes can be two main methods - in detrimental and detachable.

The first implies the use, the second is implemented without using it.

Each method of fastening has its advantages and disadvantages, and therefore the optimal version of the pillars of polymer pipes is chosen based on specific conditions.

Welded in-point compounds allow maximum sealing, which is particularly relevant in arrangement. Connecting connections are easy to install and make it possible to disassemble the pipeline at any time in order to change the configuration of the highway or to supplement it with new outlaps.

Dear connection methods

For pinds of PND pipes, two permanent means of compound are used: by welding the jack and by installing the electric welding clutch.

In any case, when implementing these methods, these requirements are subject to compounds:

• The maximum displacement angle of the welded segments should be no more than 10% relative to the wall thickness of the cut-down pipes.
• The docking seams should be made above the appearance of the surface of the adjacent segments.
• The height of the roller of a qualitatively performed seam should vary in the range of 2.5-5 mm.

The optimal value of the height of the roller depends on the thickness of the walls of the melted product. On thin-walled pipes (up to 5 mm), it should be no more than 2.5 mm. If the thickness of the pipe walls varies in the range of 6-20 mm, then the height of the roller must be no more than 5 mm.

By welding pipes online

The creation of an in-view connection is carried out by softening the material to the state of the tight substance so that the diffuse combination of its parts has occurred. It is used for pipes having a wall thickness over 5 mm.

The connection of the jack using the welding machine is used in the arrangement of the pipelines for which liquid is to be transported under high pressure conditions

The method of compounding with welding is used on direct plots of water supply, which is supposed to be operated under pressure. Only it allows to obtain a hermetic compound when diameters over 200 mm, because it does not create a loss of pipe stiffness leading to deformation.

Durable PND pipe welding is carried out using a special tool. The essence of the method consists in heating the ends of the knocked elements to a viscous state with a heating nozzle. The softened ends simply connect with each other under pressure, after which the connection site is simply allowed to cool.

The main difficulty in working with equipment is the need to control not only the degree of heating the elements, but also its own television in order not to spoil the seam and not disrupt the integrity of the pipes

When performing welding works, it is important to withstand the temperature of the heating elements.

The parameters of the time and temperature of the heating elements are determined by taking three factors into account:

1. Pipeline wall thickness.
2. Diameter of taps.
3. Technical parameters of the soldering device.

The pipe connection by welding is the most reliable and durable option. With it, it is possible to create a delicate fastening that can withstand the pressure of both non-pressure and pressure.

The main advantage of welding fasteners is reliability, which is impossible to achieve when using the cold pressing method. By the number of "minuses" of the welding method should only be attributed to the inability to disassemble the connection for preventive work and clean the same pipe

Welding is performed in such a sequence:

1. Communication is cut to a specified size. Miffinate parallelism of the ends plane. The ends are cleaned with a cut of sandpaper.
2. From the ends remove the champper width of 2-3 mm. The welding place is carefully cleaned and treated with a degreasing composition.
3. The soldering iron is installed on the heating mark of 260 °. While it warms it, rip the welding nozzles and are waiting until their degree of heating reaches a given temperature.
4. With the help of a centering mechanism in the cavity of the nozzle, the fitting and the tube end are plugged. If a centering mechanism is not provided in the soldering iron, the alignment will have to check "on the eye", making a dusting as accurate as possible.
5. The centeried elements are lined up to the specified mark, connecting under pressure, and withstand the time specified in the instruction for reflow.
6. After the operation is completed, the devices move to the side and disconnect from the network. The welding portion without offset and turn is fixed in a given position until the surface is fully cooling.

When performing welding, it is important not to reap. This can provoke the formation of polyethylene influx on the inner diameter of the product.

Video # 3. Pipe straightening option:

When choosing a method of compound and equalizing polyethylene pipes, it is necessary to take into account the level of pressure of the working medium. This one will minimize the negative impact of the manipulated manipulations with the pipeline on its technical characteristics.

The operational and technological properties of polyethylene pipes are largely similar to the properties of polypropylene pipes - the incompleteness of corrosion, the inactivity of the inner surface, chemical resistance, environmental friendliness, long service life at proper operation. However, there are also differences - both positive properties and negative. The relatively low heat resistance of polyethylene does not allow the use of pipes from it to transport media with a temperature above 40-50 ° C. They are used mainly for cold water supply, gas pipelines, ventilation systems, etc. The exception is crosslinked polyethylene (PE-X, XLPE, PE-C), which can be operated at temperatures up to + 95 ° C. High frost resistance of polyethylene pipes (up to -70 ° C) makes them an excellent material for the construction of external pipelines.

Methods for welding polyethylene pipes

Polyethylene refers to a group of well-weldable materials due to the wide temperature range of viscous state (more than 70 ° C) and relatively low melt viscosity.

Polyethylene pipes are welded by three methods - butt, fuse-roll and electric (with mortgage heaters) welding.

Welding of Russer

Welding of polyethylene pipes The driver did not receive such widespread, like fuse-glass welding of polypropylene pipes, although this method itself is as technically simple in the implementation and reliable, as in relation to polypropylene pipes. This is most likely due to the fact that polyethylene pipes are used mainly for laying outdoor pipelines with a large length of lines and a small number of turns. And the flaring welding, as is known, the maximum shows its advantages when installing the internal pipelines performed from the pipes of a small diameter and laid in rooms with an abundance of turns in all sorts of directions.

Nevertheless, the fuse-glass welding of polyethylene pipes is a technological and reliable connection method. The parameters of its mode are practically not different from the parameters of the welding of polypropylene pipes (see welding polypropylene pipes). The equipment used, all the main techniques, the values \u200b\u200bof the heating temperature of the soldering iron and the time intervals of operations remain the same (or almost the same), as well as for welding polypropylene pipes.

Welding with the use of mortgage heaters (electrical welding) is convenient for use in places with limited space, where the equipment for butt welding equipment is difficult or impossible. For it, there are no restrictions on the minimum diameter of the connected pipes. It can be used, starting from the smallest diameters - 20 mm.

When welding pipes with fittings with mortgage heaters, heating the place of the joint and the melting of the material is carried out by a spiral made of metal wire, sealed in the fitting, which passes the electrical current. The pressure in the welding zone and sealing of the connection is created due to the thermal expansion of the pipe. To carry out electromobate welding, it is necessary to have the electrospass coupling itself and the device for welding polyethylene pipes, with which the voltage to the heating wire is supplied.

Welding jack

As in the case of ventilating welding, the technology of welding of polyethylene pipes with a butt method is mainly not different from the welding of pipes from polypropylene. The difference lies only in the fact that several smaller pressure values \u200b\u200bare used for polyethylene (with heating and sediment) and time (when heated and cooling) than for polypropylene. Comparative data of these parameters are shown in the table below.

The welding of the jack is the main way of inconphigrate installation of polyethylene pipes, starting with a diameter of 50 mm. The choice of this value as an initial reason is due to the fact that the thickness of the wall of 50 millimeter pipes reaches 5 mm - just the value at which a reliable connection is guaranteed. The use of butt welding for pipes of smaller diameters is impractical and because the internal graph forms the method is too strongly narrowing and without that small passage.

The butt welding is recommended to weld pipes with the same wall thickness. Sometimes of this rule makes exceptions. In this case, the pipe with a larger wall thickness is removed at an angle of 15 ± 3 ° to the axis of the pipe, thus providing the same area of \u200b\u200bcontact surfaces.

The essence of the butt welding of polyethylene pipes is that melted with a heated tool, to the state of viscosity, the ends of the pipes are connected to each other under pressure and are withstanding in this position until the compound is completely cooling.

The resulting butt compound has strength higher than the strength of the pipe itself. When testing the sample with a fragment of the butt connection on the discontinuous machine, its gap occurs at the place of the whole material, and not along the weld (1 is a whole sample, 2 and 3 of stretching stage).

As an equipment for butt welding of polyethylene pipes, welding machines consisting of several nodes are used, each of which performs certain functions.

The centralist with four or two movable and fixed clamps is used for clamping, centering and information of pipes. The carrier (planer) is designed to process their ends. With the help of a heating tool (welding mirror), heating pipes. The device has a device that creates an effort, pressing pipes to the welding mirror (when heated) and to each other (during crimping). Power and control blocks provide voltage to nodes and maintain all parameters in the required interval.

The apparatus for butt welding of plastic pipes: 1 - a carrier with knives on both sides, 2 - heater.

Trubores are used for cutting pipes.

For butt welding, all sorts of fittings are produced.

The main parameters of butt welding. The main parameters of the butt welding include: the temperature of the tool heating, the force of pressing the pipes to the welding mirror and each other and the duration of operations. Changing the pressure is conveniently represented as a cyclogram.

The cyclogram of butt welding of polymer pipes: T op - the melting time of the ends, T n is the heating time (heated), T TP - the time of the technological pause to remove the heater, T d is the raising pressure of the precipitate, T OKH - the cooling time of the welded compound under pressure, T SV is the total welding time, P OP is the pressure of the heating tool to the ends of the pipes when placing, r - the pressure of the heating tool to the ends of the pipes during heating (heating), p OS is the pressure on the ends of the pipes during sediment.

Pressure control is carried out using a hydraulic pump pressure gauge that creates a compression force. If the pressure is generated manually or a device without a pressure gauge, control is carried out visually in the form and size of the resulting rollers of graphs. Operation time is monitored by a stopwatch.

Sequence of welding operations. The butt welding is carried out in the following order.

• Clean and degrease the ends of the connected pipes.
• Purchase pipes in the central of the welding device and process their ends with a cutter (carry out carriage) in order to ensure their perpendicularity of the axis. After moving the blanks, drive each other to check the absence of the gap. For pipes with a diameter of less than 110 mm, the presence of gaps are allowed not more than 0.3 mm.
• Between the ends of the pipes, the welding mirror is installed, heated to the operating temperature - according to the instructions on the equipment and material of the pipes. For all stamps of polyethylene, the heating temperature of the tool is placed in the interval 205-230 ° C.
• Press the tubes to the mirror with an efftive P OP, creating a pressure of 4-6 kg / cm 2, - before the appearance of a 0.5-2.0 mm tights with a height of 0.5-2.0 mm. After that, the pressure is reduced to a value of 0.2-0.5 kg / cm 2 and support it for the entire heating time. The exact pressure values \u200b\u200band duration of heating are contained in the instructions for equipment and pipes. Approximate values \u200b\u200bare shown in the table above. Welding PE pipes under cold weather may require an increase in time to warm them (increase the tool temperature is unacceptable). The optimal value of heating duration for various external conditions is best determined by producing test welding on unnecessary pipe cutting.
• After the expiration of the heating time, the movable clamp of the central tube with the pipe is removed to a distance of 5-6 cm, remove the welding mirror from the welding zone and reduce the pipes to contact, creating the pressure of the precipitation P OS 1-3 kg / cm 2. At the same time, visually control the size and configuration of the generated graph. The pressure of the precipitate is withstanding during the entire cooling time of the connection.
• Remove pipes from central clamps.

Requirements for the quality of welded connections

The appearance and parameters of a properly executed welded connection must meet certain requirements, including the following.

• Graft rollers must match the values \u200b\u200bshown in the figure below.

• The graph must be evenly and symmetrically distributed around the circumference of the joint.
• The mutual displacement of the walls of the welded pipes in the radial direction should not exceed 10% of their thickness.
• Wpadina (a) between rollers of graph (fusion line) should not be located below the outer surface of the pipes.
• The color of the graph should be identical to the flower of pipes. The presence of cracks, pores and foreign inclusions is not allowed.

The figure below shows the welded seam, made in compliance with all technological parameters. It is distinguished by smooth, symmetric rollers with rounded shapes and dimensions that do not go beyond the fixed values.

And this is how the seams made with violations of technology look like.

Too small dimensions of the rollers of Grata speak of underestimated pressure when cutting pipes or insufficient warm-up time.

Excessively large roller sizes indicate an overwhelmed time of warming up or too high heater temperatures.

Displacement of pipe ends to each other occurs with a bad center or lack of fixing pipes in the centralist.

The poor-quality transportation (the presence of a gap between the pieces of tubes) leads to uneven distribution of graphs around the perimeter of pipes.

Some features of installation of polyethylene pipes

Like all materials, polyethylene pipes are subject to temperature expansion and compression. Pipes, laid in trenches and soaked, change the dimensions to a lesser extent than laid on the surface. To compensate for temperature extensions when installing pipes in trenches, use the "snake" laying.

Installation of polyethylene pipes must be made, taking into account the reduction of their flexibility at low temperatures. It is impossible to allow too small bend radii. The table below shows the values \u200b\u200bof the minimum permissible bending radii, depending on the outer diameter of the pipe and the ambient temperature.

With the arrangement of plastic pipelines, it is very important to ensure the reliability of the connection of its component elements. Polyethylene pipes can be shrinkable in two ways - welding or using electrical products; As for the mechanical method, it is not able to ensure proper indicators of reliability and tightness.

Features of butt welding

The welding of polyethylene pipes of jack is a simple heating of the ends of the plastic pipeline. The goal is set by all the welded parts of the state of viscosity and fluidity, within certain limits. After that, there is a compound of polyethylene products under pressure.

So that this work was carried out qualitatively, it is important to securely fix the product. In the course of the compound, any shift or other kind of shift of the position of the pipes is invalid. The same mode must accompany the cooling procedure of cooked blanks.

For this technology, simplicity is characterized, but it is not always used to apply it. Butter welding is possible only in cases where the connected pipes have identical diameter and manufactured with a similar brand of polyethylene. It is strictly forbidden to weld the plastic products that have different characteristics.

Welding PND jack can be implemented under the following conditions:

1. Pipes should have a wall thickness of at least 4.5 mm.
2. Temperature range of welding - from -15 to +45 degrees.
3. This method of compound is characterized by a minor energy consumption.
4. The welding of polyethylene pipes does not provide for complex devices.
5. The implementation of the method is possible only if it is possible to reliably fix the ends of the cooked pipes.

Complex, hard-to-reach areas are not suitable for butt welding: in this case, it is necessary to use the electromocular welding of the PND pipes. In a similar way, the bubbling in the PND is performed, but there are their nuances.

Strengths of the use of electromaphs

Usually, the electromaphs are used in cases where it is not convenient to welding polyethylene pipes or not practical. Most often it happens in sewer wells, narrow and uncomfortable channels, mounting shurts at the base and walls of houses. Strictly speaking, the electromaphs come to the revenue in cases where the butt welding cannot be used.

Another advantage of this method of docking polyethylene pipes is its convenience in the event of an accident or damage to the pipeline. As a rule, such situations require very quick troubleshooting. Welding PND pipes by electromotivers is characterized by significant simplicity of implementation - some special knowledge in this case will not be needed.

The ease of installation of the device is ensured by the presence of special holes on it. To determine the optimal temperature of the temperature mode on modern welding machines, the function of reading the required information is provided directly from the barcode, which are equipped with electrical products. The compound procedure is implemented by the simplest tools - the device for stripping the tubes, the electrical flow and the welding machine.

The procedure for performing electrical welding of pipes PND

Technology welding polyethylene pipes with electric type couplings:

1. In the process of implementing preparatory activities, it will be necessary to clean the surface of the shocking blanks. They remove the oxide layer and dirt. To do this, you can use a knife, scraper or special mechanized device. Its cost is quite significant, however, when it is required to connect the pipes of a large diameter, it is quite problematic to manage with one knife.
2. Dress up with a coupling using a special positioner, which guarantees the correct position of all parts connected. For smoothing some ovality, the product is used by a special rounding overlay.
3. Degreasing procedure is mandatory for all welded surfaces. This applies to both internal and external cavities of the pipe.
4. In the event of a rain or snow on the street you need to move all the components, pipes and couplings under a canopy, then continue welding work already in shelter. This rule is mandatory for execution: otherwise, it is unlikely to achieve a reliable connection.
5. At the end of the preparatory activities begin welding of polyethylene pipes. ElectromoFUT should be placed on the end of one blank: an ordinary hammer is used to align the tubes of the pipe and the coupling. Next, the end of the second pipe is equipped with a note, until its half. When combining the ends of the connected pipes, the alignment is observed. The coupling should be put to the wrong mark. To clamp the wiring of the welding machine on the coupling there are terminals. The welding process itself is automatically implemented. On modern welding machines for welding pipes from plastic, a special function of setting the temperature mode of operation through the reading of the barcode contained on the label of the electric clutch is provided.
6. For the simplicity of determining that the welding procedure is completed, the electromotive is equipped with a series of identical holes. When polyethylene begins to flow out of them, this testifies to the readiness of the connection. After that, you must definitely pull the wires of the welding machine from the clutch terminals.
7. The final stage of the docking of polyethylene pipes is the complete cooling of the finished area. While this happens, it is very important not to touch it and not to move the pipes, otherwise the whole procedure will go to the pump. In cases where by negligence, the offset still happened, it will be necessary to trim the cooked blanks at a distance of 10-20 mm from the molten ends, and conduct all the procedures first.

Due to the simplicity of the implementation of this method for the docking of PVD polyethylene pipelines, the connection of the electromotive and welding has gained considerable popularity. It takes not only homemade masters, but also professional plumbing.

For compounds of this type, a high level of strength and reliability is characterized - leaks and other defects at the place of docking usually do not occur. The polyethylene pipeline mounted in a similar way is able to effectively be used for almost a hundred years. However, in order to achieve such a result, in the process of work, it is necessary to strictly comply with all the recommendations for ensuring a qualitative connection.

Electromofold welding - one of the main types compounds of polyethylene pipes (PND), the feature of which is the use of a special heating element - electrical facility. This welding method is more expensive than the use of online welding, but sometimes without this method can not do. In this article, we will consider, in which cases the electrofold welding and what the principle of its work is used.

Today electromete welding PND Used for pipes of different wall thicknesses and different diameters, when installing the non-per-first pipeline - drainage and samotane sewage systems, inserting into a valid pipeline and repair already existing pipelines. When connecting the electromobate, the speed of work is very high and a little free space is required.

Usually, electromofold welding of polyethylene pipes It is carried out using special equipment equipped with microprocessor control. Due to this, coupling welding ensures control of the process parameters, automatic adjustment of the welding time, which depends on the parameters of the shaped element and air temperature.

Polyethylene tube coupling technology

Welding of polyethylene pipes with this method of welding makes special requirements for work. Before starting welding, it is necessary to clean the surface to be welded, following the way there is no dirt or oxide film. In case of welding of a branch saddle, properly selected clamps should be applied. When electrical welding is carried out, the pipe and the shaped element must remain absolutely fixed, and not only during the connection, but also during the cooling process.

The process of welding pipes using mortgm windows is performed in the following sequence:

• the ends of the combined polyethylene pipes must be cleaned of contamination and degreased.
• the electrospate is put on the end of one of the pipes, to the combination of the cover of the coupling and PND pipes. If necessary, the pipe is clamped in a positioner. The second pipe is aligned with the first "end to the end", after which the coupling comes in the opposite direction on 1/2 of the coupling length.
• wires from the welding machine are connected to the terminals of the electromaphs.
• the heating process is started in the "automatic" mode. The welding of the pipes is complete when the molten polyethylene spoke out of the fitting control holes.
• the last stage of the process is the natural cooling of the welded knot until completely immobility.

The main advantages of electrical welding:

• Universal use with respect to polyethylene and thickness of its wall. The properties of molten polyethylene make it possible to use this method to connect pipes with different diameters.
• Practicality and convenience when installing. For the Welding of the PND, this method is sufficient to simply move together the ends of the pipes and connect them to the heating element, after which it is necessary to heat them, simply by submitting an electric current to the clutch conclusions. After that, the process will occur offline.
• Reliability. A distinctive feature of this method is the reliability and durability of the final result. Materials in the joints penetrate each other, so the seam density is the same as in the rest of the pipe.
• Economical and efficient use. Apparatuses for electrical welding Different with a compact size, low mass and relatively low power consumption.

Based on the above, we can conclude that the electrofold welding has proven itself as a reliable, economical and convenient technology for connecting pipelines in gas and water supply, as well as for sewage. The pipeline collected from polyethylene pipes with a qualitatively performed welding process will serve several decades, without requiring additional maintenance and repair. However, the specialists of the Volzhanin plant note that a mandatory part of the procedure welding polyethylene pipes is to control the quality of compounds performed. Continue the processing of pipes in the future can only be inspected by all compounds performed. The seds performed exactly must comply with the established technical requirements, only then the compound can be confidently recognized as high-quality.

If you plan to connect pipes to the VOLZhanin brand apparatus and you have any questions in the process of using the equipment, you can get round-the-clock technical support by phone hotline 8-800-200-17-45 (a call to Russia is free).