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Connecting fittings for polyethylene pipes low pressure

PND (low pressure polyethylene pipes) are one of the most modern and popular products for the construction of various destination pipelines. In turn, each of them has an entrance and exit, and almost everyone has different shut-off valves and branches, respectively, for this we need and fittings for PND pipes.

Types of polyethylene pipes depending on the destination.

There are a large set for PND pipes, which can be divided according to the principle of dusting with the product. How to understand this manifold and how is the correctly selected by one or another shut-off fittings?

All types of PND connections are divided:

• by hardness: rigid and non-rigid (elastic) compound;
• on the unit: detachable and inline connection;
• by the method of performing the connection.

When installing fittings for PND pipes, including shut-off valves, can be docked with pipeline in various ways.

Incomponable connection

Welding is the main type of connection. Exist various methods Welding products. Some of these methods are more common, some are applied less often.

Scheme of butt welding.

Welding methods:

1. Butter welding is the most common way when the product end and fitting is melted with a special device and they are pressed together, a monolithic seam is formed as a result of the melt, which is similar in its properties of the pipe material. For this method, fittings and PND pipes must have the same diameter. Jump welding is very often used when building internal water supply and heat supply networks, while "manual irons" apply. If the product is fixed in the welding machine with a special accuracy relative to the place of dusting, then when performing work manually, it is necessary to pay special attention to the mutual location of the products, and the best thing is to froze the seam to fix them with any devices.
2. Nest welding - has the same principle, except that the fittings for PND pipes with an inner diameter are used in this method, which is equal to the outer diameter of the product. If in the first method (welding of the jack) the soldering iron is made in the form of a disk, then with the nesting welding one side of the soldering iron is flat and equal to the diameter of the pipe, the other side has a view of the rod, the diameter of which is equal to the inner feeding diameter.
3. Edge (Pressing) Welding - is used mainly to weld the product with the inputs of wells, etc., where it is necessary to weld the pipe to the plane, which in its size exceeds its diameter. For this, special PE electrodes are used. This method is applied only in a non-pressure system that does not require absolute tightness.
4. Electrical welding - the process of welding consists in melting polyethylene, while fittings and PND pipes should also have the same diameter. However, this method requires the use of a special coupling. The coupling has a heating grid and two contacts in production. Each such coupling has a barcode. If an automatic welding machine is used, it reads the data independently and sets the optimal parameters of the welding. Otherwise, these parameters need to be set manually.

Scheme of electrical welding.

Connect connection

Based on the fact that all welded fittings belong to all-in-disposal compounds, the shut-off valves and control devices are not installed with their use. Since in the case of the release of these devices, with a deline connection, their replacement requires considerable effort.

The next type of connection is. They are used, as a rule, on external networks and the principle of their action is the same. The compression fitting has a ring (cut) and a protracted nut.

Flange compound - used, as a rule, for with a large diameter, in places where the shut-off and other fittings are installed.

Nut, then we dress the ring on the product, after which we tighten the nut. After it is tightened, this compound ensures the impossibility of slipping the ends of the product during stretching effects. In today's market, manufacturers offer both brass and compression type. As a rule, it is used in the threat of shock loads to this compound.

Based on these manufacturers, compression fittings are designed for the pressure of the working medium to 20 atmospheres, that is, they are suitable for applying them in pressure networks.

Flange compound - used, as a rule, for piping pipes with a large diameter, in places where the shut-off and other fittings are installed, or when the pipeline is connected from polyethylene with metal sections. At the same time, the flanges are usually used in polyethylene networks, and, if necessary, the transition to metal is brass fittings equipped with a plastic tap, which is designed for a welded compound with a polymer product.

The threaded connection is used outdoor, which is cast on one of the end of the pipe, and internal - on another pipe connections or fitting. This compound is considered not particularly reliable. Based on this, it is used for the installation of non-pressure fluid transportation systems or in the cable communications laying.

The pipe compound is based on fixing the end with the standard diameter of one product, inside the expansion at the end of another product or fitting. As a rule, this compound is applied when installing a non-pressure drainage system (sewage) or when laying a cable.

Varieties of fittings

For laying a pipeline from, fittings are applied in the following cases (by material and type):

Variety of fittings for detachable pipe connections PND

1. Coupling Equipment - produced with the same diameter from both ends. Used to dust individual pieces of pipe or with other elements with the same diameter size as the pipe.
2. Compensation clutch - It is used to possibly change the diameters of the pipeline or installing an element with a large / smaller size
3. Compound carving plastic. When docked, for example, polymer and metal reinforcement, a combined fitting is performed. A mortgage element with an external or internal thread is mounted in the plastic sleeve, it is usually made from brass.
4. Flanges are used for mounting removable reinforcement or dusting with pipes from other materials. There are combined and PE. Flange couplings They are their variety.
5. Tires. Of course, polyethylene is pretty flexible material, but still it is impossible to allow too sharp bends. The use of taps allows the pipeline to significantly change the direction. According to the standard there are bends for taps at 45 °, 66 ° and 90 °.
6. Crosses and tees - with the use of such fittings, the pipeline can be counted with the necessary number of other sections of the network. Branch can be both with the same and characterized diameter.
7. Plugs. This variety Fitting allows you to preserve the "deaf" PND pipes. Such a situation may be, for example,, if necessary, to derive a certain section of the water supply, or you can apply in places where the new connection will be organized later, etc.

In general, and fittings to it allows you to create a combination that will make it possible to build a pipeline for any task and in any conditions. Along with a relatively low price and high operational properties PND products, it provides a polymeric material well-deserved high popularity, both in private consumers and in assembly organizations.

Polyethylene compression fittings are crimped connecting details Compression type for installation of polyethylene pipe pipes PE 80 and PE 100. Compression fittings for injection molding from polypropylene copolymer. Polyethylene compression fittings are made with internal and external threads of various forms: compression couplings, compression tees, compression taps of ionized compression taps, compression plugs and flange compression compression compression connections.

PND compression fittings are made with a diameter of 16 mm to 110 mm and with a working pressure from 10 to 16 atmospheres (BAR): for diameter from 16 to 63 mm to 16 bar, for diameter from 75 to 110 mm to 12.5 Bar. PND compression fittings are connected to PE pipes using a crimp fitting ring, which is pressed on a pipe. Compression fitting for polyethylene pipes is a collapsible design, which consists of modular components.

Areas of use

PND compression fittings are designed to connect and install polyethylene PE80 and PE100 brands in place changes: turns and branching, in places change the diameter of the pipeline, in places of connection with pipeline reinforcement, as well as for switching from polyethylene pipes to pipes from other materials. Compression fittings for applied when installing and repairing PE80 and PE100 brands, which are used in drinking and technical water supply systems (pipelines transporting drinking and edible water, technical Water in irrigation systems, etc.), as sealed cable channels. Also, these fittings can be used in any pipelines with a working medium, with respect to which the chemical resistance of the compression fittings themselves is provided. Very widespread polyethylene compression fittings are used in automatic irrigation systems.

The use of compression fittings made of low-pressure polyethylene provides complete tightness between the mounted items. Installation of compression fittings of PND small diameters is made in manual without the use of special tools, large diameters with a special compression key. Use compression fittings for PE polyethylene pipes in any weather conditions and negative temperatures. Store compression is needed in rooms, protecting against direct sunlight.

COMPRESSION FITTING FITTING PND

Compression fitting for polyethylene pipes consists of five elements:

1 -Gay-cover is made from polypropylene copolymer, designed for fixation and crimping, has an internal thread and external grooves for convenient screwing.

2 -Ampressive folding ring is made of polyoxymetiline, prevents movement and squeezing the fixed pipe, as well as spontaneous development.

3 A compressive function is made of polypropylene copolymer, fixes the sealing gasket in the correct steady position and limits its limit compression and the deformation of the pipe.

4 - The laying ring - the gasket is made of nitrile rubber, ensures reliable tightness of the connection with the pipe, even with its beggars.

5 -Corpus compression fitting, is made of polypropylene copolymer, has a trapezoidal thread for nuts and a pipe introduction limiter.

Main advantages

• Easy installation: Installation occurs quickly and without prior preparation of the pipe, since the fittings are supplied ready for installation and do not require special skills and additional equipment.
• Ease of repair: When repairing compression fittings, special skills are not required, additional equipment and welding machine, only a plastic or metal compression key is needed, and the repair itself occurs by replacing the internal components of the compression fitting.
• Multiple disassembly assembly: assembly and disassembly of compression fittings for PND pipes can be carried out repeatedly up to 10 times.
• Corrosion resistance: There are no metal elements in the PND compression fittings
• Hygienicity: All parts of compression fittings are made from materials that are suitable for transportation. drinking water and food liquids
• Connection with elements from other materials: PND compression fittings have standard inner and outer threads, so you can mount the prefabricated elements for connecting pipes and fittings from various materials.

Properties and characteristics

Compression fittings for polyethylene PE pipes have high resistance to temperature differences and high resistance to various chemicals. Compression fittings for PND pipes have high wear resistance during the transportation of various liquids and have a service life for more than 50 years.

Fittings for pipes from low-pressure polyethylene are an indispensable element in professional worksassociated with conducting a pipeline for heating or water supply. They are a transition to a threaded connection. Fittings are quite universal and well suited during the use of a polyethylene, steel or other pipe. Choosing a high-quality product, you guarantee the protection of the pipeline from leaks, as well as other similar problems. The company offers products of such brands: ITAP, Tiemme, Unidelta.

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Tee crimping TIEMME 40 - necessary elementused to connect polyethylene and pex pipes of one diameter when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying technological pipelines, Pneumatic pipelines transporting substances to which polypropylene is chemically racks. Type of connection of the tee - crimping. The TIME material is crimped TIEMME 40 - brass CW617N (resistant to washing zinc). Termination conditions of the tee Crimping TIEMME 40: working pressure up to 30 bar, maximum working temperature +110 degrees Celsius, working medium - non-aggressive fluids such as hot and cold water, oil, compressed air and TP. Compression connection does not require any additional devices For mounting, except wrench.

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Discount price: 1 973.07 rub

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Shipment Norm: 1 pc.

Number of units:

1 +1

Amount: 1 973,07 rub

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The tee crimping-n Tiemme 25x3 / 4 "x25 is a necessary element used in the transition from the crimp part to the threaded compound of polyethylene and pex pipes when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, Pneumatic conductors transporting substances to which polypropylene chemically racks. Type of conjunction of the tee crimping-n Tiemme 25x3 / 4 "x25 - crimping and exterior thread. TIME Material crimping-H Tiemme 25x3 / 4 "x25 - brass CW617N (resistant to zinc-leaching). Terms of operation of the tee crimping-n Tiemme 25x3 / 4" x25: Working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working temperature Wednesday - non-aggressive fluids, such as hot and cold water, oil, compressed air and TP.

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Discount price: 459.00 rub

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Shipment Norm: 1 pc.

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Amount: 459,00 rub

Tee crimping-n Tiemme 40x1 "1 / 4x40

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The tee crimping-H Tiemme 40x1 "1 / 4x40 is the necessary element used in the transition from the crimp part to the threaded compound of polyethylene and pex pipes when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, Pneumatic pipelines transporting substances to which polypropylene chemically racks. Type of conjunction of the tee crimping-n Tiemme 40x1 "1 / 4x40- crimping and exterior thread. TIME Material Crimping-H Tiemme 40x1 "1 / 4x40 - brass CW617N (resistant to zinc-leaching). Terms of operation of the tee crimping-n Tiemme 40x1" 1 / 4x40: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working temperature Wednesday - non-aggressive fluids, such as hot and cold water, oil, compressed air and TP.

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Discount price: 1 737,89 rub

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Shipment Norm: 1 pc.

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Amount: 1 737,89 rub

Tee crimping-n Tiemme 50x1 "1 / 2x50

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The tee crimson-n Tiemme 50x1 "1 / 2x50 is a necessary element used in the transition from the crimp part to the threaded compound of polyethylene and pex pipes when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, Pneumatic wires transporting substances to which polypropylene is chemically racks. Type of connection of the tee crimping-n Tiemme 50x1 "1 / 2x50- crimping and exterior thread. TIME Material Crimp-H Tiemme 50x1 "1 / 2x50 - brass CW617N (resistant to zinc-leaching). Terms of operation of the tee crimping-n Tiemme 50x1" 1 / 2x50: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working temperature Wednesday - non-aggressive fluids, such as hot and cold water, oil, compressed air and TP.

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Discount price: 1 699.00 rub

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Shipment Norm: 1 pc.

Number of units:

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Amount: 1 699.00 rub

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The tee crimson-n Tiemme 63x2 "x63 is a necessary element used in the transition from the crimp part to the threaded compound of polyethylene and pex pipes when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, pneumatic pipelines, Transporting substances to which polypropylene chemical racks. Type of conjunction of the tee crimping-n Tiemme 63x2 "x63- crimping and exterior thread. TIME Material Crimp-H Tiemme 63x2 "x63 - brass CW617N (resistant to washing zinc). Terms of operation of the tee crimping-n TIEMME 63x2" x63: working pressure up to 30 bar, maximum working temperature +110 degrees Celsius, working medium - non-aggressive fluids such as hot and cold water, oil, compressed air and TP.

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Shipment Norm: 1 pc.

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Amount: 2 699,00 rub

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The tee crimping-in Tiemme 25x3 / 4 "x25 is a necessary element used in the transition from the crimp part to the threaded compound of polyethylene and pex pipes when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, Pneumatic pipelines transporting substances to which polypropylene chemical racks. Type of connection of the tee crimping-in Tiemme 25x3 / 4 "x25 - crimping and internal thread. TIME-in TIEMME 25x3 / 4 "X25 - brass CW617N (resistant to zinc-leaching). Operating conditions of the tee crimping-in TIEMME 25x3 / 4" x25: working pressure up to 30 bar, maximum operating temperature +110 degrees Celsius, working temperature Wednesday - non-aggressive fluids, such as hot and cold water, oil, compressed air and TP.

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Discount price: 385.00 rub

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Shipment Norm: 1 pc.

Number of units:

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Amount: 385.00 rub

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The tee crimping-in Tiemme 63x2 "x63 is a necessary element used in the transition from the crimp part to the threaded compound of polyethylene and pex pipes when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, pneumatic pipelines, Transporting substances to which polypropylene chemical racks. Type of connection of the tee crimping-in TIEMME 63x2 "x63- crimping and internal thread. TIMMME 63x2 coniferment material "X63 - brass CW617N (resistant to zinc-leaching). Operating conditions of the tee crimping-in TIEMME 63x2" x63: working pressure up to 30 bar, maximum working temperature +110 degrees Celsius, working medium - non-aggressive fluids such as hot and cold water, oil, compressed air and TP.

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Discount price: 2 699.00 rub

In stock

Shipment Norm: 1 pc.

Number of units:

1 +1

Amount: 2 699,00 rub

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The clutch crimping the elongated TIEMME 63 is a necessary element used to connect polyethylene and pex-pipes of one diameter when installing cold and hot water systems, heating in residential, administrative, industrial buildings, when laying process pipelines, pneumatic pipelines, transporting substances to which polypropylene chemical racks . Type of coupling connection - crimping.

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Discount price: 1 995.26 rub

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Shipment Norm: 1 pc.

Number of units:

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Amount: 1 995.26 rub

Fittings for PND pipes (low-pressure polyethylene) are in demand in residential and private construction, they are used as connecting fittings For cold water supply, sewage systems and gas pipelines. As a rule, they can withstand the pressure of the working stream to the 10thm for the gas or the 16thm, if water is transported.

Fittings provide reliable and quality mounting NAP pipes that does not occupy a lot of time and does not require special efforts, for example, compression clutches can be installed using only the key.

Sale of these products has been established in almost any city, so there will be no problems with the acquisition. The cost of connecting reinforcement is influenced by type, sizes as well as different kinds technical parameters.

The fittings used in the installation of pipes made from the PND are made classified by type of compound, the following options are currently practiced:

• the use of electrical welding;
• crimping (collet) connection method;
• welding jack;
• flange connections.

Accordingly, for each method you need to use your type of connecting tubular reinforcement. Consider in detail each of them.

Video: PND compression fittings, couplings, taps

Welding jack

For this method, the connecting reinforcement will not need, since the pipes are equipped directly to jack. Welding allows you to provide almost any constructive solution.

The figure shows all stages of this process:

• a - centers of pipes relative to each other;
• b - the headset is removed from the end of the pipes, the width of it from two to three millimeters. After that, the ends are cleaned and degrease;
• c - ends are checked for alignment;
• d, E - using the heater, fixed between the ends, is melted polyethylene;
• f - pipes are connected, during this process, it is necessary to prevent their rotation and displacement.

The cooled connection is immediately ready for operation.

Main advantages:

• low cost;
• quick installation.

Disadvantages:

• connect pipes without welding equipment is not possible;
• welding is permissible only when the thickness of the pipes is more than 5mm.

Connection of electromophobous welding

This technology will help in cases if it is impossible to apply conventional welding, for example, when welding equipment cannot be installed on the connection site. The connecting reinforcement for pipes from the PND is electric welded fittings (clutches), which is installed open electric heating spiral.

To connect the pipes by this method, a welding machine is needed equipped with a barcode scanner, a photo of such a device is shown in the figure below.

The compound process is performed according to the following algorithm:

• the preparatory stage, it lies in the fact that before welding of polyethylene pipes, their ends are cleaned and degrease;
• the pipes are shred into the clutch slurry, and the mortar-element is connected to the welding machine;

• using the scanner, the barcode applied to the connecting fittings body is read, this is required to install the required mode;
• after switching on, the layer of polyethylene is melted, while the pipe is expanded from heating, as a result of which it presses to the coupling;
• the device is automatically disabled, according to the selected mode, after the natural cooling, the connection is ready for operation.

This method is good because it does not require special skills, it is absolutely easy to learn. But there is a significant drawback of such a tube connection technology from PND - high prices for welding equipment and fittings.

Crimp (collet) method

Threaded (collet) compounds of pipes made from PND are greater popularity than other ways, this is due to the fact that there is no need to resort to the help of expensive specialized equipment.

Everything mounting work You can make a conventional tool, in rare exceptions you may need a key (when crimp nuts with a diameter of from 63 to 110mm).

Note that in addition to the connecting tube reinforcement for the crimping connection, both shut-off, that is, the cranes are installed, which significantly expands the scope of its use when carrying out a water supply.

Using compression fittings for connecting pipes made from PND material, diameter 20, 32, 50mm, etc., you can independently assemble a reliable and durable water supply system of the house or apartment. It is easy to do if adhere to the following recommendations:

• choose pipe reinforcement of well-known manufacturers, such as Tiemme or Unidelta, this will avoid numerous problems during operation;
• connection Make a standard thread that is desirable to pre-clean and calibrate;
• do not tighten the threads until you stop, always leave free one or two turns;
• for compaction, you can use a special teflon tape, sealant, or, as a last resort, linen pass. Remember that plastic fittings, and not metallic, so you do not need to apply a lot of effort to them when twisting;
• it is recommended to install the connecting elements on the direct plot, in this case the risk that the pipe will turn or flat down is minimal;
• to reliably fix the pipes of a large diameter when tightening the nut, use the key.

To combine the pipes made from PND material, an crimson method, you can use brass fittings, which, although it is much more expensive, but have many advantages, namely:

• couplings are more reliable and durable than polyethylene analogues;
• they have a higher pressure threshold, which ensures resistance to the hydrodar;
• the material is not affected by corrosion;
• when tightening the nut, you can not worry that the thread is torn.

The only drawback, as mentioned above, is a high cost, but if you can afford not to save on quality, we recommend using this type of connecting tubular reinforcement.

Flange compounds (adapters for metal and metal-plastic pipes)

Without this type of pipe reinforcement, it is impossible to do, if it is necessary to ensure the transition from pipes made from PND, to a metal, for example, to connect to a riser.

Approximate price level

We give the price level in various cities of Russia for the most common type of connecting elements for PND pipes, namely, compression fittings, this information may be useful if you are going to buy them, but there is no time to make a comparative analysis.

The average level of fittings for PND pipes in various regions of Russia is approximately the same, the cost of the device in Nizhny Novgorod, Samara, Chelyabinsk and Moscow approximately at the same level. The review was conducted for retail prices, respectively, the wholesale price will be lower.