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When installing a highway from PE, for their docking between themselves or to install fittings, flanges are used for polyethylene pipes.

This item can provide the most reliable, durable and hermetic flange compound.

Building articles

Features of details

Fixing fitting for PE and PVC pipe - This is a flat disk with equidistant bolts. This product is installed along with boom or sleeve.

Types of products

The main parameters for which flange products for PE and PVC pipes are characterized, is an internal diameter, external dimensions, weight and working pressure.

Depending on which tasks are performed by these parts, there are the following types of adapters:

• adapter with special welded bushings;
• caid metal flange;
• flange free type adapter based on direct or taper bourge.

The best way to which can be combined with light and middle PE pipes with a diameter of no more than 150 mm and light pipes with a diameter of up to 300 mm is a free flange based on a straight bourge. The free flange with cone bore is used for reinforcement having a diameter of more than 200 mm.

Characteristics of the fixing flange for polyethylene pipes (video)

Advantages and disadvantages of the flange for PE and PVC pipes

The clamping steel free flange adapter has several advantages over other details, which makes it more popular in use. The mains are as follows:

1. The adapter allows you to install PE and in the metal highway, it makes the repair of such systems more affordable.
2. To mount the flange there is no need to use some special tools and spend a lot of time: wrench and small skills allow you to install the item without any problems.
3. Also, the clamping flange adapter has the ability to compensate for the process of compression and stretching the axis and it glautoes to facilitate the process of installation and operation, and reduce installation time.

As for the shortcomings, the most significant is the fact that the gasket is destroyed, which ensures the density of the adjacent. This is due to the fact that they are plugged as much as possible, and this leads to exceeding the strength of the material.

Structurally most failed in this regard, as it cannot protect the laying from the deformation.

Those models of products in which gaskets are provided in some recesses are considered more protected from the rupture of the gasket, however they do not provide protection in full, especially with a long service life of the part.

When installing the flange, it should be considered the fact that Under the influence of heat, the metal can expand. This leads to the fact that the fasteners elements are extended more than the adapter itself, and this can disrupt the hermetic flange compound.

The clamping flanges are ordinary flat fastening rings (PND flanges) manufactured according to GOST 12820-80, the inner diameter of which is crushed to the required size. The fastening holes are uniformly located along the flange circle. The main application of the clamping flanges were found in polyethylene (PE) pipelines, where they are used to connect PND pipes to each other, as well as to attach polymer pipes to metallic, connecting to pipes of industrial equipment, shock reinforcement, etc.

Initially, all clamping flanges are manufactured according to a single standard, but then they are reassigned, acquiring different inner diameters. The amount of the required diameter is determined depending on the size of the polyethylene sleeve, which will be used together with this flange. The spreading flange is put on the sleeve, the end of which is welded to the end of the pipe. Installation carried out in this way allows you to achieve a particularly high strength of the compounds. In this case, the flange is perfectly attached to the pipe of any size, and all other parameters are the number of holes and their diameter, the intercentricular distance - fully match the flat welded flanges, made in accordance with GOST 12820-80. Putting boring flanges for PND pipes are several types - for pipes with maximum operating pressure in 6, 10, 16 and 25 atmospheres. The clamping flanges presented in our catalog are made of high-grade steel of St20 (steel 20) with an anti-corrosion coating applied to it, which ensures the durability of products and resistance to the external environment.

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Price list "Flanges clamps for polyethylene (PE) pipes RU 10"

With arrangement modern Systems Sewerage, heating, water supply is often combined with polyethylene pipes fittings. Also, when laying household communications, flanges are used, allowing you to collect pipe products from different materials.

Polyethylene pipes (PE) in recent years actively displaced traditional cast iron and steel products from the construction market. Plastic structures for a number of indicators are superior to metal. Therefore, such a process has a completely logical explanation - everyone wants to have reliable in its dwelling in operation and inexpensive at cost, heating, sewage, collected without welding. When installing, it is necessary to deal with one problem. It lies in the fact that many elements of household pipelines in apartments are made of metal products.

Compound of plastic and metal pipes

And here it is important to correctly comply with PE pipes with steel (cast-iron). You can do this in two ways: with the help of flanges and by means of fittings. The flange compound of polyethylene (polypropylene) pipes with steel is recommended for cases when systems are equipped with a cross-section of more than 50 mm. But pipelines with a diameter of up to 50 mm better to connect fittings. They are special elements with a smooth coupling for connecting PE pipes and carvings for metal pipes.

The flange is made in the form of a threaded part. It is most often used to connect metal and polyethylene water pipes, as well as gas communications without welding. Flanges for assembling household networks from different materials have not only threads on one side, but also a mandatory seal. The latter is located at the second end of the element described. The sealer guarantees the preparation of hermetic and truly durable compound, which, if necessary, can always be disassembled.

Example of flange compound

To lay the communications you can use:

1. metal flanges;
2. flanges for special sleeves (they are called Barts).

Homemade craftsmen are advised to connect PE pipes on the second of these techniques. In this case, the compound is obtained as high quality as possible. The flanges under the sleeve are made of steel 20. Flanges for polyethylene pipes are designed for operating pressure to 1.6 MPa. These parts are made by a cross section from 20 to 1200 mm. Therefore, problems with the selection of suitable elements to create detachable connections never occurs. There are several subtleties of assembling communications using flanges. We give them further:

• flanges with a support for a conical sleeve need to be used when working with pipes in cross section above 200 mm;
• light pipe products from PE with a diameter of 150-300 mm, as well as a heavy cross section of less than 150 mm best connect using flanges with direct boom;
• to increase the strength indicators of the connection of pipes from different materials, you can use straight-shaped sleeves with a special conical transition.

When choosing flanges to create detachable connections, pay special attention to the quality of the fasteners. They are not allowed to have burrs and sharp faces. Such defects can cause damage to PE pipes. Flange compound of polyethylene pipes with a cross section of more than 50 mm is made according to a simple scheme. You need to smoothly cut the pipe product in a place where it will be docked on another part of communication. After that, you carefully pull the flange on the pipe and put on top of the rubber gasket.

Such a sealing element may go for a maximum of 1 cm maximum, no more. Then you ignore the flange on the laying and perform its docking (using the bolts) with the response flange. Bolts need to tighten very carefully. If you make excessive efforts when performing this procedure, a polyethylene tube can crack.

Separate elements of communications (heating, water supply) in an apartment or house are often connected by fittings. These elements are indispensable for connecting polyethylene pipe products to metal filters, counters, mixers, pipes and other parts of the modern pipeline. Fittings are cut out the outer or internal thread. Structurally, they were noted above, are special adapters with thread and coupling.

Fittings for connecting pipes

When choosing fittings, you must consider the diameter metal pipeon which they will cut.

Adapters are ideal for cases when the pipeline has a lot of bends and turns. System assembly (steel or cast iron pipes Plus polyethylene) with the help of fittings are performed as follows:

1. Remove the clutch of the metal pipe product. If the place of the PE and steel pipe It falls on another site, it will be necessary to cut the old metal product. And then you need to lubricate the cut edge of the oil or solidol and through threads of making a new carving under the fitting. Operation for a more or less experienced craftfish is simple.
2. Carefully wipe the thread on the pipe, wind her fum-ribbon or ordinary pacles. After that, apply from above Silicone. The tape or the pass wound quite a bit. It is enough to perform a couple of turns. At the same time, the edge of the wound material should be necessarily directed along the thread.
3. Hands (Do not use the key or other tool) gently screw the connecting fitting on the thread. With severe pressure on the adapter, the likelihood of its cracking is high.
4. In the coupling, which is available at the second end of the fitting, insert the PE tube and solder it.
5. Treat a sealant connection.

In principle, all. You have compiled a polyethylene (or polypropylene) pipe with steel. Turn on the water (if the water supply system was made) and check the fitting location for leakage. If there is such a thing, simply slightly twist the adapter. The finals of work - processing with a sealant of the compound made. It is possible to fully use the pipeline after 3-4. During this time, the sealant is completely dried.

Flange adapter is a special device for creating a hermetic connection in pipelines. The part performs the function of the adapter for a durable joint of the pipeline parts or a flange to attach the lock-controling reinforcement and other parts of the system. The flange adapter for polyethylene pipes differs from other varieties by the restrictions on temperature indicators and pressure indicators in the system, and can not be used in highways with an aggressive working medium.

The design is a device consisting of a coupling and a flange. You need to combine the adapter with the flange of the pipeline using the bolts, and the clutch with the smooth end of the pipe.

When the bolts are tightened, the clamping rings are shifted towards each other, the seal is deformed, tightly pressed against the outer surface of the pipe, thereby creating a strong joint of the parts of the pipeline.

Advantages and disadvantages of the device

The adapter performs the role of a compression compensator and stretching the axis and smoothes minor deviations from initial project in the process mounting work and operation.

The part allows you to install pipes from polyethylene and polyvinyl chloride into a metal highway. The device is resistant to vibrations, elevated temperatures and jumps of pressure.

Thanks to the gasket-seal, the part can be used, including in systems with an aggressive working environment.

To fulfill the connection, no special tools are required, except for a wrench and any special skills and skills, which allows you to save both time and means.

Note! The only drawback can be called that due to the too strong clamp with the gasket, providing a dense fit, collapsed.

Types of adapters and scope of application

The flange adapter is used in shipbuilding systems, automotive industry, in construction and housing, oil and gas industry.

There are several types of flange adapters:

• cast iron pipe adapter;
• for mounting PVC pipes;
• for PE pipelines;
• for AVK (used for PE and PVC pipe products).

Note! A device for polyethylene pipes is used only in systems operating with standard values \u200b\u200bof pressure and limit temperature of 700 per only for the transportation of water and other neutral fluids.

Flange PE Pipe Adapter: Specifications

The PE tube adapter is characterized by an epoxy coating that is applied by an electrostatic method.

When laying a pipeline from polyethylene pipes to solve problems related to connecting them between themselves or with reinforcing elements, a flange for PE pipes is used. What is a flange fittings, as well as the features of the installation of such a compound are discussed in this article.

Flange - as an element of pipe fittings

Features of the product

A structural flange fixing for PE pipes is a flat ring, and rather a disk in which holes are located at the same removal. These holes are used to fix connections using bolts (studs). Flanges are installed along with boom or sleeve.

The sleeve under the PE flange immediately in front of the boom has a special expansion to strengthen, due to which the flange is leavingly adjacent to the flange. Building flanges are applied to solve this problem. Such products differ from standard products in that they have an increased (boring) inner diameter to the required value so that the flange is tightly sat down on the sleeve. All other parameters, such as the number of holes for the bolts, their diameter, the intercentrose distance fully correspond to the standard, flat, steel flange.

Application of flanges

Steel flanges are used to connect polyethylene pipes:

• pressure, as well as non-patories;
• systems designed to remove atmospheric precipitation;
• storm sewage;
• technical (industrial) pipelines, etc.

Thanks to the flanges, it is possible to create a reliable, split connection of pipe products with different valves, cranes (valves) and other pipe fittings. If necessary, such a connection can be quickly disassembled for repairing or cleaning pipeline products.

Varieties of flanges

Geometric standard dimensionsAs well as the manufacturing technology of these products fully complies with the requirements of state standards. For organization of compound different pipes With the reinforcement and devices, the industry produced a large range of products. All flanges for polyethylene pipes are characterized by:

• internal diameter;
• external dimensions;
• diameter of the bolts;
• weight;
• working pressure.

Depending on the tasks performed, the following varieties of flanges are distinguished:

1. With special welded bushings.
2. Metal cape.
3. Free type based on the brights that can be straight and taper.

To connect polyethylene pipelines laid by medium and severe PE pipes having a diameter of no more than 150.0 mm as well as light tubesbut large diameter (up to 300.0 mm) optimal option There will be free flanges that are based on a straight bourge. Flanges of free type, but with a support for cone barts are used for pipes with a diameter of 200.0 mm and more.

Flange compound installation order

This type of connection due to the simplicity and efficiency of the installation is very common when laying pipelines from polyethylene. To obtain a flange connection with welded bushings, it is necessary:

1. Cut the pipe in the location of the planned docking. Ensure that the slice is perfectly smooth.
2. On the end of the pipe to welcome the flange adapter for PE pipes (special sleeve).
3. On the welded sleeve using a threaded connection to install the flange itself.

Flanges should always be carefully examined before installing for sizards and sharp elements that can easily cause damage to tubular products and fittings.

1. On another section of the pipe or other element of pipeline fittings, in the same way to establish a response flange.
2. After docking, the flanges are bonded with each other with bolted connections.

To use the free type of precipitated metal flange:

In both cases, it is very important at the last stage evenly crossly delay the flange bolts. The effort must comply with the technical documentation.

Thus, the steel flange for PE pipes is a reliable and durable element of pipeline fittings, with which it is possible to mount a hermetic, detachable connection of parts (nodes) of the pipeline line of polyethylene.