Cross-linked polyethylene Rehau: selection of pipes for heating, tools and installation of pipes

Characteristics and types of pipes

Cross-linked polyethylene pipes are subdivided into four groups according to the type of production:

PEX-a - peroxide;
PEX-b - silane;
PEX-c - processed by fast electrons;
PEX-d - nitrogen.

They are produced in diameters from 10 to 110 mm, working pressure from 8 to 25 bar. They are designed to work in the temperature range from 0 to 95 ° C and do not react with acids and alkalis.

They are used in devices:

warm floors;
heating of household and industrial premises;
cold or hot water supply;
piping of air conditioners.

They withstand the freezing of the coolant without breaking the connections, quickly restore their previous dimensions after defrosting the water.

RAUTITAN pink

These are specially designed PEX-a pipes for creating heating systems in private houses and industrial premises. To protect against dissolved oxygen in water, an intermediate layer of ethylene vinyl alcohol is used.

RAUTITAN pink is used in pipelines with a working pressure of up to 9 bar and a maximum temperature of up to 95 ° C. For a short time, polyethylene pipelines will withstand an increase in the temperature of the coolant up to 110 ° C. Pipes with nominal bore diameters from 16 to 63 mm are produced, supplied in coils or in separate six-meter pieces.

RAUTITAN his

Rehau Rautitan His 311

Rehau RAUTITAN cross-linked polyethylene pipe is used to supply hot or cold water to residential and industrial premises, to tie technological pipelines. It is produced from cross-linked polyethylene of the RAU-PE-Xa brand with the addition of peroxides under pressure. It is produced with nominal bore from 16 to 63 mm in coils or in separate pieces up to 6 meters long and with wall thickness from 2.2 to 8.6 mm.

The use of this grade of polyethylene ensures the stable operation of pipelines at an operating temperature of the coolant up to 90˚С. It has a small temperature elongation of 0.15, has flexibility (bending radius is 8 diameters), wear resistance, and a service life of more than 50 years.

RAUTITAN stabil

These pipes are used in heating and water supply systems. RAUTITAN stabil is a multi-purpose tube with several layers. An intermediate protective aluminum layer is located between the inner and outer shells. It acts as an insulator of the outer layer of uncrosslinked polyethylene from the diffusion of oxygen from water into it.

In drinking water mains, the pipes must be designed for an operating pressure of up to 10 bar. In heating systems, RAUTITAN stabil pipelines are installed on mains with operating pressure up to 10 bar and coolant temperature up to 95˚С.

During emergencies, it can withstand a short rise in water temperature up to 100 degrees Celsius.

RAUTITAN flex

Rehau rautitan flex

RAUTITAN flex pipes supply hot and cold water, arrange underfloor heating, are used in rooms for heating with cast-iron batteries or bimetallic radiators.

The intermediate protective aluminum layer not only prevents the penetration of oxygen from the water into the inner layers of the XLPE, but also promotes better heat transfer. Therefore, these pipes are recommended to be used when installing underfloor heating under: ceramic tiles, laminate, porcelain stoneware.

RAUTHERM S

The RAUTHERM S pipe is used for underfloor heating. Due to its low price, the most popular among consumers was a cross-linked polyethylene pipe with a diameter of 17 × 2.0 mm.

The pipeline is protected against the penetration of dissolved oxygen from the intermediate layer of ethylene vinyl alcohol copolymer. Due to the three-dimensional internal structure, products made of cross-linked polyethylene are tear-resistant, do not form cracks throughout the entire period of operation.

The guarantee for the use of pipelines without rupture of connections against exceeding the working pressure of no more than seven times is 10 years.

In XLPE pipes, antifreeze or ethylene glycol can be used instead of water. The flexibility of the pipelines allows you to use different layouts in one piece, which eliminates the leakage of the coolant by 100%.

Rehau heating pipes

The Rehau company, in its richest assortment, presents a line of universal Rautitan pipes, of which three types are suitable for heating systems:

RAUTITAN stabil pipes

These pipes are versatile and can be used in heating and water supply systems. Available in diameters from 16 to 40 mm (16, 20, 25, 32, 40). Pipes 16, 20 mm are produced in coils of 100 meters, and with a diameter of 25 mm in coils of 50 meters. Diameters 25, 32 and 40 mm are supplied in lengths of 5 meters.

The pipe structure is a three-layer structure:

PEX-c inner layer.
The middle layer is butt-welded aluminum foil, which acts as an oxygen barrier.
The outer layer is made of PE polyethylene, which gives the pipe an attractive appearance.

It is advisable to use the RAUTITAN stabil pipe for supply lines in heating systems at temperatures up to 90 ° C and operating pressures up to 10 bar.

RAUTITAN flex pipes

These pipes are also universal for heating and water supply systems. Available in diameters from 16 to 63 mm (16, 20, 25, 32, 40, 50, 63). Small diameters (16, 20, 25) are supplied in coils, medium and large diameters in 5 or 6 meter lengths (25, 32, 40, 50, 63).

The RAUTITAN flex pipe is made of PEX-a cross-linked polyethylene, and the outer thin layer to prevent oxygen diffusion is made of a special material - ethyl vinyl alcohol (EVAL). These pipes are easy to bend, therefore they can be used for flexible installation, as well as in highways.

Pipes RAUTITAN pink

These pipes are intended exclusively for heating systems, they are produced in diameters from 16 to 63 mm with the same standard sizes as other pipes of the RAUTITAN system from Rehau. The main material is PEX-a polyethylene cross-linked by a peroxide method and an outer oxygen barrier made of EVAL.

These pipes can be used both in supply lines and in the "warm floor" system (diameters 16 and 20 mm). RAUTITAN pink resistant to high temperatures: 95 ° C at a pressure of 9 bar. They are very elastic and bend easily, which is important when laying underfloor heating heating circuits.

Rehau pipe fittings

What are the briquettes for the firebox

Rehau fittings are guaranteed to connect parts of the pipelines while maintaining complete tightness. The method of pressing pipes and fittings with sliding sleeves forms a non-separable unit during the warranty period. The main feature of non-separable joints:

they do not have rubber gaskets and O-rings;
they do not need a hydraulic pressure test to determine a possible leak;
the inner section is the same along the entire length, there are no narrowings and burrs from the material;
fittings in drinking water pipes are made of bronze or brass;
installation of connections takes place using proprietary tools that exclude the appearance of defects;

Attention: the technical conditions prohibit the use of RAUTITAN MX brass fittings in conjunction with stainless RAUTITAN SX. ... The diameters of fittings and sliding sleeves for hot water supply and water pipelines range from 16-63 mm

The diameters of fittings and sliding sleeves for hot water supply and water pipelines range from 16 to 63 mm.

Installation of a cross-linked polyethylene pipe

Materials (edit)

Before starting work, prepare the necessary tools and consumables. You will need:

Vise.
Fittings: couplings, adapters, elbows, tees, sliding sleeves (when installing a sliding sleeve, you do not need to use rubber gaskets, which increases the reliability of the structure).
Expansion device.
Roulette.
Pipe cutting tool.

Rehau pipe - construction

Classification

What are the screens for the heating battery

What does Rehau offer today? The scope of the pipes it produces is wide enough. In construction, these are heating, plumbing, hot water supply and sewerage systems.

Sewerage

They are made from polypropylene. Brand - RAU-PP1221. From the technical characteristics, it is necessary to note a long service life, products can withstand heavy loads and temperatures. Let's add simplicity of installation here.

Elements are connected using fittings and fittings. The company offers sewer pipes that can be used for both indoor and outdoor networks.

Cold and hot water supply

For these systems, the company manufactures cross-linked polyethylene products.

This variety is gradually replacing metal-plastic counterparts due to its high technical and operational characteristics and ease of the installation process.

Heating

This life support system uses two types:

Reinforced plastic.
Made of XLPE.

Gradually, pipes from the second group are replacing the first type. This is due to new requirements for heating systems, where the water temperature sometimes reaches +100 ° C. Reinforced-plastic products can only withstand +95 ° C.

PEX Specifications and Applications

Due to the unique molecular structure of PEX, pipes made of this material have enhanced capabilities compared to other types of polyethylene. The most common applications are the following utility lines:

Heating system;
Water pipes;
Snow melting;
Warm floor.

Underfloor heating with XLPE pipes

The use for heating, as well as hot water supply, determined the main technical characteristics of the PEX pipe. The most important qualities are:

Nominal diameter - 10-110 mm;
Running meter weight - 0.10-0.15 kg;
The nominal pressure is 8-25 bar.

Cross-linked polyethylene is produced by the world's largest polymer companies. The most famous manufacturers of PEX pipes today are the following companies:

Rehau;
Uponor (Uponor);
Birpex (BIR PEX)
Valtec.

A hand tool is required to install the pipeline. The basic kit, which is supplied with the tubular products, or purchased separately, includes the following tool:

Nozzles for crimping fittings of various diameters;
Reamer with handles;
Expansion nozzles;
Cutting scissors;
Surface cleaning brush.

XLPE pipe hand tool

Hand tools are used to connect piping elements to fittings and help to reduce installation time to a minimum. Also, due to the simplicity of the system, the installation can be performed by anyone, even without special skills.

Advantages and disadvantages

How to choose a water heater what are the water heaters, the features of each type

Just like any product has its own advantages and disadvantages, they also have Rehau products.

Benefits:

easy and quick to assemble;
do not transmit noise from moving water to monolithic structures of the house;
long service life - 50 years;
versatility;
do not corrode;
do not form a coating of calcium and iron salts on the inner surface;

Thanks to the wide variety of fittings, it is easy to cut into the water supply or heating system.

Disadvantages:

relatively high cost;
expensive equipment for installation;
require the installation of "P" or "L" shaped temperature compensators on long sections of pipelines;
the flexibility of polyethylene requires auxiliary fixing elements.

Rehau-PEX pipes, despite their high cost, are confidently conquering the market, crowding out competitors.

Benefits

All Rehau pipe products have the following advantages when compared with analogues from other manufacturers:

the material is resistant to corrosion;
low thermal conductivity;
high operating temperature and the possibility of operating temperature fluctuations without losing the original characteristics;
absolute tightness of the connection is ensured by the shape memory of the material;
good sound insulation characteristics;
resistance to various influences of a mechanical and chemical nature, as well as ultraviolet radiation;
long service life, which is 50 years.

Advantages and disadvantages

Rehau Rautitan products are made from high quality polymer compounds using the most modern technologies, which ensures their amazing performance.

Rehau pipes have undeniable advantages.

Unique connection system. Sliding sleeves allow high-quality installation even for people without special skills, while the chance of incorrect joining is about 2%. And also it provides the following: installation of the pipeline without welding, soldering or other special means;
high reliability and tightness of the joint, and therefore pipes can be sewn into walls without fear of leaks;
minimum terms of work.

Unique inner surface. The inner walls of Rehau pipes do not form deposits of salts, scale and other problems typical of metal pipelines and other plastic pipes.

High operating temperature. Its indicators fluctuate depending on the type in the range of + 90–95 ° C.

Excellent elasticity and flexibility, no kinks.
High resistance to abrasive materials, mechanical shock, vibration.
The polymer is excellent at absorbing noise.
Pipes do not corrode, do not shrink, do not rot.
The polymer is completely resistant to the freeze and thaw cycle.
Pipes are made from inert substances that are not harmful to health.
Excellent material memory. After bending, the pipe regains its shape. When stretched, the shape is restored if the elongation did not exceed 300%.
The service life depends on the conditions and ranges from 5 years (under the most severe) to 50 years (under normal conditions).

In addition to positive qualities, Rehau products have their weaknesses, such as:

water pipes are very strong and resilient; tools will be needed to bend products with a diameter of more than 32 mm;
push-in fittings are not cheap, and with an increase in the diameter of the pipe, their price rises;
the pipe material is vulnerable to direct sunlight.

The approximate cost of pipes depends on the type, namely:

Rehau Rautitan Stabil with a diameter of 16–32 mm costs about 110–375 rubles per 1 m;
Rehau Rautitan Flex with a diameter of 32 mm will cost 305-310 rubles per 1 m, and with a diameter of 50 mm - 620 rubles;
the price for 1 meter of Rehau Rautitan His with a diameter of 16 mm will be about 115 rubles, with a diameter of 32 mm - 445 rubles, and the widest version of 63 mm - about 1170 rubles.

What is XLPE

Why Choose XLPE

The cross-linked polyethylene pipe is a building material of the modern generation. The origins of its creation lie in the last century. It was then that the first PEX, cross-linked polyethylene, was produced. But today this material has a completely new image with many advantages and possibilities.

Crosslinked polyethylene is based on high pressure processing and the creation of special bridges between the layers. This process is called "stitching". Hence the name of the material itself follows - Rehau pipes made of cross-linked polyethylene.

There are several technologies for stitching pipes:

Peroxide technology (PEXa).
Gas treatment (PEXb).
Creation of an electromagnetic field and irradiation of the material with electrons (PEXc).
Treatment due to nitrogen compound (PEXd).

For example, Valtec cross-linked polyethylene pipe is created using PEXb technology, and Rehau products are created using PEXa and PEXc technologies.

Diagram of a cross-linked polyethylene pipe

Where is XLPE used?

Cross-linked polyethylene technology is used in the arrangement of hot and cold water supply, as well as for heating systems in homes, offices and apartments. Rehau polyethylene pipes are also used for arranging a warm water floor. In this case, the owner of the house may not be afraid for the integrity of the pipe, even at high temperatures.

Rehau products can significantly increase the service life of the communication system. During production, this material loses its crystalline form, which makes it flexible and practical. With it, you can create heat and water supply systems with a large number of bends.

The service life of pipes depends on the operating temperature. In conditions of temperature conditions up to 75 º and pressures up to 9 bar, Rehau polyethylene pipes will last up to 50 years. If the operating temperature in the pipes reaches 95 º, then the service life is reduced to 15 years. Rehau polyethylene pipes more easily tolerate low temperature conditions due to the existence of cross-links. But the Valtec cross-linked polyethylene pipe can be operated at a temperature of no more than 80 º and a pressure of 6 bar. Temperature rise up to 95 º is possible only for short periods. In this case, the design life is 50 years.

System of warm walls made of cross-linked polypropylene

Advantages of the material

The advantages of this material are as follows:

Reliability and long service life.
Resistant to chemical processes, including oxidation.
The presence of a diffuse barrier, which avoids the penetration of oxygen from the outside.
High resistance to hydrodynamic and mechanical pressure.
There are practically no cracks on the pipe surface.
Stable operation at high and low temperatures from -200 to + 200 °.
The ability to recover, that is, to acquire the previous indicators when receiving damage in the form of deformation.
Absence of manifestations of the corrosion process - the appearance of rust on the surface of the pipes.
High shrinkage rates.
No emission of harmful substances even when working at high temperatures.
Lack of heavy metals.
Saving time during installation.
Affordable material cost.

Pricing

The cost of Rehau products depends on the series of channels and their sizes.

To see the average price per meter of these products, see the table below.

Pipe type	vendor code	Packing size	Price (€)
2,2x16 mm	136042-120	120 m	2,12
2,2x16 mm	136042-006	60 m (6 m each)	2,42
2.8x20 mm	136052-120	120 m	2,76
2.8x20 mm	136052-006	60 m (6 m each)	2,97
3.5x25 mm	136062-050	50 m	4,13
3.5x25 mm	136062-006	30 m (6 m each)	4,47
4.4x32 mm	136072-050	50 m	5,74
4.4x32 mm	136072-006	30 m (6 m each)	6,21
5.5x40 mm	136082-006	12 m (6 m each)	9,64
6.9x50 mm	136092-006	6 m	12,63
8.7x63 mm	136102-006	6 m	18,25

More detailed information on the prices of the products in question can be found on the websites of the official dealers of the company. There you will find comprehensive information on this matter. We strongly do not recommend purchasing products from resellers or firms with a dubious reputation. There are quite a few fakes on the market. Therefore, you should not risk it for the sake of saving. It is better to buy quality materials once, than to spend money, time and energy on correcting mistakes later.

The cost of installing Rehau pipes depends on the size of the project. For a small one-room apartment, this figure in Moscow and St. Petersburg can be from five thousand rubles. In Kiev, these works will cost less. The cost of installing Rehau pipes in the Ukrainian capital can be as low as about one thousand hryvnia.

Below you can watch a video clip in which you will learn a lot of interesting information about the products of the German concern Rehau.

Differences from polypropylene pipes

The products of the manufacturer in question are made of cross-linked polyethylene. Products made from this material greatly outperform PP ducts.

The key difference between Rehau's channels from the aforementioned analogs is:

scratch resistance;
effective sound insulation;
stronger resistance to high temperatures;
resistance to sunlight.

Polypropylene products are cheaper. However, they are not as flexible as Rehau channels. Therefore, the low cost of polypropylene is leveled by the cost of its installation. This procedure is much more complicated than installing Rehau pipes.

Polypropylene has poor resistance to sunlight. Therefore, it is not recommended to mount it in an open way. In addition, Rehau channels have a shape memory effect. This creates an almost absolute tightness.

In general, we can make an unambiguous conclusion that Rehau pipes are more resistant, reliable and durable. Installation of the products in question is simpler and more convenient. Therefore, apart from the low cost, polypropylene has no advantages over the products of the German manufacturer Rehau.

Types of Rehau fittings

Conventionally, all connections can be divided into three groups: couplings, tees and elbows. Distribution manifolds and manifolds can be classified in a separate category.

By the type of installation, there are three main methods:

compressor;
compression;
welded.

Rehau manufactures fittings of all types.

Compression (adjustable)

The compression type of installation is also called serviceable, since such a fitting can be dismantled at any time without damaging the parts. This may be necessary, for example, to replace the seals.

This fitting consists of:

couplings;
crimp collet ring;
crimp nut;
seals;
gaskets.

A ring and a nut are put on the pipe. There are two O-rings and a gasket on the coupling nipple. Then the sleeve is inserted into the pipe and crimped. The coupling has both special ribs for retaining the seals and a thread for connecting to the nut.

The advantages of such a fitting include the fact that only two adjustable wrenches are required for its installation, and wrenches may also be suitable.

Crimp

Such a fitting consists of only two elements - a sleeve and a ferrule. For installation, you will need special equipment - an expander and a tool for axial pressing. The sleeve is put on the pipe with a chamfer towards the connection. The pipe itself is expanded by an expander to a size that allows the coupling fitting to be inserted into it. Then the sleeve is pushed under pressure over the area where the union is located. Dismantling of such a fitting is impossible. You will have to cut the sleeve, which is quite difficult. Such a fitting is mounted very quickly and reliably.

Welded

As an alternative, the electro-diffusion welding method is used, but it is unlikely to be possible to carry out it on your own. Firstly, even in the instructions of the company, this method of connection is not clearly described and it is separately stipulated that such work can only be carried out by specialists. Secondly, for this method of fastening, you will need rather specific equipment, which is problematic to get. In addition, the order of prices for such an instrument is quite high.

According to the technology, the sleeve is put on over the joint. There is a wire inside the sleeve, which acts as a heating coil, to which current is supplied. The surfaces to be welded are heated to the melting temperature and subsequent joining.

Features of the installation of a pipeline from Rehau products

Installation of Rehau pipes has its own characteristics, the manufacturer recommends using certain fittings depending on the application. For example, threaded ones require periodic monitoring, so it is highly undesirable to use them for hidden pipelines.

Required materials and tools

Pipeline assembly may require specific equipment, therefore Rehau offers an assembly tool for all types of fittings.

The scope of delivery for a compression fitting includes:

basic tool M1;
2 fixing pins;
pipe cutters;
expander;
tube with grease;
brush for cleaning the tool;
suitcase and instructions.

In addition, spare parts and accessories are included in the form of expansion tips and press vices. Only two adjustable wrenches are required to mount the compression fitting.

Installation of a press fitting on a XLPE pipe

A special tool is required to mount the press-on fitting, but this is the only inconvenience.If the need is one-time, it makes sense to rent it.

The installation process for a compression fitting is quite simple:

The pipe is cut with scissors (you can also use a regular saw, in which case the cut must be cleaned). The incision must be made at right angles.
A movable sleeve is put on the pipe. The chamfer must point towards the joint.
The end of the pipe is expanded with an expander. This is done in two steps, after the first time the pipe is turned 30 degrees, and the operation is repeated.
The fitting is inserted into the pipe until it stops (up to the last rib).
The sleeve is pressed onto the fitting. The connection of the sleeve and the sleeve is completely gripped by the press clamp. The tool is installed at a right angle; it must not be skewed. A special lever on the tool is moved to the press-in position, the expander handles are brought together, the sleeve is pushed up to the fitting flange.

XLPE

What it is

Rehau Rautherm XLPE can only be red.

Polyethylene pipes have been used for a long time. Products made from this polymer have proven themselves excellently as pipes for cold water supply and drainage, as well as for transporting other substances that do not cause chemical destruction of polyethylene. However, this option is not suitable for hot water, since it has a low resistance to heating.

Pipes made of ordinary dense polyethylene are most often used for water supply.

Given the excellent characteristics of polyethylene pipes, the scientists decided to modify this polymer so that it could withstand the stresses inherent in hot water systems.

Molecularly cross-linked polyethylene: bonds between molecules.

Soon, a solution was found: the developers of a new plastic saw that the strands of molecules could be stitched together, forming spatial bonds between carbon atoms. Moreover, four different stitching methods have been found:

Peroxide. The material is designated as PE-Xa. The most expensive and most efficient stitching method. By adding hydrogen peroxide to the high-density polyethylene melt, the maximum possible at the moment degree of crosslinking of the material is achieved - 75%.

Rehau XLPE PE-Xa pipe.

Silane. The result is a polymer designated PE-Xb. The polyethylene melt is treated with moisture containing organosilanide and a special chemical catalyst. The result is 65% crosslinking and lower material costs.

Silane crosslinking also gives good results.

Electronic. The resulting material is referred to as PE-Xc. The method consists in bombarding solid polyethylene with charged electrons. As a result, crosslinking is achieved, the degree of which does not exceed 60%. This is the cheapest way, although the material is somewhat different in quality and features.

Electronic stitching is cheap and durable enough.

Nitric. The least common way to give PE-Xd. The reaction of treating polyethylene with nitrogen compounds is rather complicated technologically, therefore it is practically not used today. Gives stitching up to 70%.

Crosslinked polyethylene is a polymer whose strands are interconnected in space to form a three-dimensional molecular lattice, similar to that created by the atoms of solids. The material is different:

increased strength;
heat resistance;
resistance to corrosion and chemicals.

Differences between Rehau products

Rehau Rautitan pipe with flex and stabil grades.

The Rehau company is the world leader in the production of cross-linked polyethylene PE-Xa and products from it. The high popularity is due to the fact that the company has created a complete system, which is distinguished by a completely thought out and unified installation process - from cutting the pipe to the final installation of the system and putting it into operation.

This is what the assembled heating system looks like.

The water underfloor heating system is characterized by increased requirements for the quality of the pipeline and connections. To independently understand where you can save money, and where you should spend money, you must have sufficient experience in working with warm floors.

Moreover, you will still spend time and money on the selection, search and purchase of all the necessary fittings, tools, etc.

The connection with fittings of different configurations is the same.

Rehau offers a completely sophisticated system with several pipe types, tools and a complete set of parts. Installation of Rehau pipes is unified and does not depend on the scope of application.

This allows us to characterize the product as the most reliable and suitable for those who are used to getting the expected result instead of playing roulette.

A pipe connection consists of three main elements: pipes, sleeves and fittings.

Rehau polyethylene pipes

Rehau XLPE piping systems are the most popular today. The closest competitors are Uponor, Polish manufacturer KAN, Israeli Golan and others.

If we compare XLPE pipes with other piping systems (for example, polypropylene and steel pipelines), then XLPE pipes will be much more expensive, nevertheless, there is a consistently high demand for them.

They are easy and quick enough to mount. After having cut it off with scissors, inserted the fitting into the pipe, tightened the connection with a turnbuckle. The turnbuckle connection can be poured safely into the screed.
The installers do not put the usual threaded strong connections into the tie. Because a leak through a detachable connection after years of operation is quite possible and the damage that this leak can cause, being laid under the finished floor, can have very serious financial consequences.
They can be safely bent and pinched, and at the same time the pipe does not deteriorate, unlike metal-plastic, polypropylene, not to mention steel.
Soundproofing properties of high molecular weight polyethylene, which gives a quieter operation, these pipes are characterized by the highest durability. The manufacturer guarantees work for at least 50 years.
Compared to others, XLPE pipes do not corrode, and they do not form scale deposits on the inner surface.
Produced in Germany, which in itself adds a few points to karma.

Among the shortcomings, we can note the high cost. The Rehau piping system can be especially expensive if there are many bends and tees in it, because the cost of the fittings is quite high, compared to polypropylene fittings. The difference in cost is much higher.
Also, the disadvantages can be attributed to the low elasticity of the pipes, that is, aligning it in a line can be false enough, therefore, additional fasteners are required.
The high cost of the installation tool. If the cost of a tool for installing pipes up to 32 diameters costs $ 400, then the cost of a set of hydraulic tools for installation with a diameter of 40 mm and above will cost $ 2000 and more.

In other matters, the Rehau tool, both standard and hydraulic, is easier to rent from a pipeline supplier and it is not difficult to save money on this.

Rehau pipes for water supply

This series is focused on medium temperature radiator heating. It is not used for arranging a warm floor. It holds its shape perfectly, has high strength and the ability to withstand high pressure.

The German company Rehau has been producing pipes and various fittings since 1948. The company's products are recognized all over the world. For manufacturing, the latest material is used - cross-linked polyethylene, which ensures the durability and reliability of the products.

In addition, experts note that not only professionals, but also ordinary people can perform the installation of Rehau pipes. What is required for this? Read on.

Increased noise insulation.XLPE is capable of absorbing sounds produced by the flow of water.
Installation of Rehau pipes is carried out using a unique method that allows you to create the most durable connection.
The material from which the pipes are made is versatile. From pipes, you can create systems for hot and cold water supply, heating, and use for arranging a warm floor. The maximum fluid temperature in such systems is 95 ° C.
Pipes are practically not susceptible to cracking and deformation during mechanical damage, so they can be laid under plaster or covered with other structures.
High degree of thermal insulation, which helps conserve natural resources.
Any pipe is capable of withstanding differences in fluid temperature and internal pressure.
Complete safety for humans. The company's products are certified.
The special coating of the inner walls of the pipes prevents the formation of deposits and the reduction of the throughput.

Rehau pipes and various fittings can be used to design pipelines of any complexity and purpose. The only drawback of Rehau systems is the high cost of products and fittings.

What Kinds of Rehau XLPE Pipes Are There

Rehau Rautitan pink;
Rehau Rautitan his;
Rehau Rautitan flex;
Rehau Rautherm S;
Rehau Rautitan stabil;
Rehau Rautitan basic.

The Rehau Rautitan his pipe is used for cold and hot water supply with temperatures up to 70 degrees. The Rehau Rautitan flex is a versatile pipe for both water supply and heating.

Rehau Rautitan stabil, like the previous type, can be used for both heating and water supply. It has several advantages: it has an aluminum stabilizing layer that reduces linear expansion, the pipe itself is stiffer, which allows it to be made more straight sections.

The Rehau Rautitan stabil withstands short term high temperatures better than the Rehau Rautitan flex.

Rehau Rautitan basic is an outdated technology that is no longer used. On older, previously executed systems, it can be found. This pipe differs not in axial fittings, as in Rehau Rautitan, but in radial compression fittings.

Rehau Rautitan pink is used for heating systems. Although it is recommended to use the Rehau Rautitan flex instead of the Rehau Rautitan pink due to the small cost difference and the slightly better performance of the Rehau flex.

Cross-linked polyethylene Rehau for heating

Rehau Flex cross-linked polyethylene pipes are designed for universal use, both in water supply systems and in radiator and underfloor heating systems (hot water floor), in apartments, houses, storey buildings and other premises.

Rehau Rautitan Flex is a cross-linked polyethylene pipe made in Germany. Rehau is the world leader in water supply systems. Rehau Flex is designed for heating and water supply systems, meets all the requirements of today.

The highly efficient assembly system with Rehau press fittings makes this pipe easy to use and durable. Connection errors with fittings are 98% excluded.

Rehau Flex are universal pipes made of high pressure peroxide crosslinked polyethylene (PE-Xa) with an oxygen protective layer, which determines the absolute strength of their self-supporting layer.

Thanks to this technology, during operation, Rehau Rautitan Flex pipes are odorless, do not emit harmful substances, and maintain the quality of drinking water.

long-term operation at high coolant temperatures up to 90С;
low temperature elongation;
high rigidity and durability;
excellent shape memory;
flexibility, corrosion resistance and absence of deposits;
quick and high-quality installation with a slip-on sleeve connection system;
compliance with the highest European quality standards and sanitary requirements.

Rehau Flex pipes are connected using a unique slip-on sleeve fitting system and the Rehau Rautool universal assembly tool, allowing simple,fast and high-quality installation in water supply and heating systems of any complexity and on any area, and also makes any projects easy to implement.

Installation of heating systems Rehau

The assembly of Rehau metal-plastic and plastic heating systems is carried out in the same way as in the case of using polypropylene products.

There are very few differences, there are only a few of them:

Installation is carried out using the Rautool tool, which is used to connect products with a diameter of 14-110 millimeters. The drive for it can be manual, electric or battery.
When arranging heating, it is necessary to use special polymer fittings of different diameters.
The company's own development is the installation of elements with a movable sleeve, thanks to which it is possible to install the pipeline without revisions.

Installation of the heating system Rehau

Installing the channels of the manufacturer in question is quite simple. To solve this problem, you need to buy the appropriate tool and carefully read the instructions for assembling the pipeline.

The step-by-step execution of the task is as follows. Purchase the required number of pipes and fittings. Make a diagram of the future system. Prepare tools that are useful for the job.

You'll need:

Expander with a set of special attachments for channels with different cross-sections.
Press clamp. The set should also include nozzles for working with structures of different diameters.
Pipe cutter for working with plastic products.
Yardstick.

The assembly of the pipeline must begin with the preparatory stage.

It includes two points:

Cutting structures into the required sections.
Preparation of connecting components for the creation of various sections of the pipeline.

To create a heating circuit from Rehau products, prepare different places in the circuit in advance and check the correctness of the circuit used.

To carry out the verification step, the fittings and pipes used must be folded in the order specified in the project. Particular attention should be paid to slicing products. Mistakes made can lead to serious consequences.

The connection of channels and fittings is carried out by means of sleeves.

A nozzle is selected to match the expander. It must be exactly the same size. It is important that the handle of the tool at this point is 100% dilated. The ends of the handle should be positioned strictly at an angle of ninety degrees.

Make sure that the nozzle on the expander is firmly attached and sits against the stop on the pin. A sleeve is put on the part of the channel connected to the shaped part. Moreover, its diameter must fully correspond to the dimensions of the structure used. The chamfer of the sleeve must be directed towards the future connection.

A pipe is put on the second part of the expander nozzle. When the instrument is brought together, its structure will expand. At this moment, it must be docked with the shaped part. The installed sleeve is brought to the fitting.

It is pushed into the connecting element by means of a press clamp. This must be done all the way. This is the only way to get a reliable and durable joint.

Try to avoid the occurrence of various distortions of channels and fittings to them. It is important that all components are connected strictly horizontally in relation to each other. Otherwise, in the near future there may be problems with the operation of the system.

In order for the installation of the water supply and heating system to go through correctly, all existing norms and rules must be strictly observed. Be sure to wear protective masks that will reliably protect your eyes. Also, be sure to use gloves.

Almost any person can cope with the installation of Rehau structures. Installation of this equipment does not require special knowledge and skills.The main thing is to carry out each stage correctly.

Assembly tool

The Rehau company made sure that the installation of its pipelines was carried out as correctly as possible, and for this purpose it released the special tool RehauRAUTOOL. The simplest basic tool kit Rehau RAUTOOL M1 consists of several tools required for mounting:

Pipe shears 40 RAUTITAN Stabil.
Expander for pipe expansion manual Rehau RAUTOOL RO system.
A set of interchangeable attachments for expander of different diameters.
Manual press for crimping a slip-on sleeve, called the "basic tool M1", with a set of attachments for various sleeve diameters and fixing pins.
Tube lubricant.
Tool cleaning brush.
Suitcase for transportation.

It should be noted that the set of tools is quite expensive, but in any construction market it can be rented for the duration of the work.

Heat-resistant polyethylene pipes PERT

This is a new modern material, which is not known to everyone in the construction market, especially to ordinary buyers. There are Pert pipes of types 1 and 2:

- type 1 pipe is standardized, has temperature limits up to 70 degrees, so the main purpose is low-temperature heating systems (for example, installation of warm floors); applies up to 4 classes of operation; pipe diameter and wall 16x2.0, 20x2.0, therefore, compatible with radial crimping systems;

- pipes of the 2nd type - a material that in its characteristics is practically close to PEX, or even ahead of them in some way. There is no memory effect inherent in many PEX materials, but it is better to refrain from restoring the kink. Has an oxygen protective layer.

Features of Valtec cross-linked polyethylene

The world-renowned manufacturer Valtec offers PEX-b cross-linked polyethylene for the consumer. According to the manufacturer, this is the optimal piercing method, which combines low cost and uniformity of the pipeline wall. Valtec pipes belong to the 4th class of operation according to GOST and have the following characteristic features:

Resistance to temperature effects, which allows the use of products for heating systems and hot water connections;
UV resistance;
Simple installation, which does not require a special tool for laying the pipeline;
No abrasive wear;
Low weight of products;
Possibility of using pipes in coils of considerable length;
Hygienic and non-toxic;
Chemical resistance;
Are not afraid of aggressive work environment;
Electrical inertia.

Valtec XLPE pipe

Valtec products can withstand short-term heating up to 95 ° C and a constant operating temperature of 80 ° C.

However, there are minor shortcomings in the Valtec pipeline. The main negative qualities are:

Lack of shape memory (Valtec pipes must be additionally secured with clamps);
Sufficiently high coefficient of linear expansion of Valtec products;
Deformation due to prolonged exposure to sunlight on the Valtec pipeline.

These features have led to the use of the Valtec pipeline, preferably for hidden installation - in grooves, under a concrete screed, in boxes. Valtec cross-linked polyethylene is actively used:

For built-in heating and cooling systems (warm walls, warm floor, warm ceiling);
For heating open areas;
For heating panel structures.

Varieties of pipes

By purpose, the products can be divided into two types: for water supply and heating.

Also separates internal engineering systems and radiant heating and cooling systems. The former can be used for both water supply and heating, the latter only for heating / cooling.

Heat supply systems are placed in a separate category.

Rehau also produces polypropylene domestic sewage pipes.

Special pipes RAUTITAN his and RAUTITAN pink are used for internal engineering systems. The former are intended for cold and hot water supply, the latter are used for heating systems.

All Rehau products are manufactured using the RE-Xa method, i.e. the peroxide crosslinking method. The suggested diameters are from 16 to 63 mm.

RAUTITAN stabil can be used as universal pipes, however, their maximum diameter is 40 mm, or RAUTITAN flex with a diameter of up to 63 mm.

A novelty are insulated pipes of these brands, which have a layer of extruded insulation made of foamed polyethylene. They are intended for thermal insulation of the heating system on load-bearing ceilings.

Insulation allows:

enhance the water-repellent effect;
increase resistance to aging;
protect from heat generation, condensation;
protect against sound transmission through building structures.

For radiant heating and cooling systems (such systems also include underfloor heating) RAUTHERM S and RAUTHERM SPEED are offered. The second feature is the presence of adhesive tape on the surface for attachment to the laying mats.

In addition to floor systems, both wall and ceiling systems can be equipped. At the same time, ceiling tiles are offered in the form of gypsum boards with an already built-in pipe.

RAUVITHERM UNO (with one insulated pipe) and RAUVITHERM DUO (with two) are used as heating systems.

They find applications in the following areas:

centralized and local water supply;
drinking and hot water supply;
pool equipment;
refrigeration equipment;
industry and agriculture;
air-water pump connections;
heat pumps using the heat of the earth.

The sound-absorbing internal sewerage system is represented by RAUPIANO PLUS. The diameter of these products is from 40 to 200 mm. These are polymer multilayer pipes with reinforcements in the cornering zones. Special clamps are also used to absorb noise. Polypropylene is more expensive than HDPE pipes, but it is lighter, stronger and has a smoother surface, so it is more resistant to dirt.

Warm floor

Practice shows that the main direction of using pipes from the Rehau company is a heating system underfloor heating

Here it is important to correctly carry out the calculations and choose the right installation scheme.

Wiring types

The rehau pipe routing can be done with a snake or a spiral.

The first option is the simplest, but it has one drawback - the coolant at the end of the circuit is very cooled, which leads to uneven heating of the entire floor. Therefore, experts advise using a spiral as a piping.

Payment

As for the quantity, here it is necessary to take into account the heat transfer rate in linear form. For example, a pipe with a diameter of 16 mm distributes heat well at a distance of 15 cm from both sides.

That is, its total coverage is 30 cm.This means that a space of 30-35 cm can be installed between the branches of the contour.

Calculating the number of branches, knowing the size of the room, is not difficult. This indicator is multiplied by the length of the room, but it must be borne in mind that the distance from the walls to the pipes should be 20 cm.

The main types and their features

Rehau manufactures pipes designed for use in pipelines for various purposes. It is advisable to choose products that have positive reviews and good technical characteristics. The wiring can be assembled by hand, if you take into account the recommendations of experts. All products of the Rautitan line are divided into types, each of which is focused on performing specific tasks: supplying hot and cold water, heating and arranging a heated floor. For these purposes, several types of pipes have been created.

Stabil

These are pipes for functional purposes, which are produced on the basis of a metallized polymer and are painted in silver.Structurally, they have an aluminum interlayer, and the inner layer is cross-linked polyethylene (PE-X / AI / PE). They can be used in any type of water supply: cold and hot water, low-temperature heating.

The performance characteristics of Stabil pipes are as follows:

working temperature up to + 95 ° С, can withstand surges up to + 110 ° С;
section diameter is 16–63 mm;
differ in elasticity and have high strength indicators;
working pressure - up to 10 atm.

The pipe is realized equipped with a coupling and sleeve for optimal sealing of joints. In addition, the installation process is simplified and accelerated. There is no need for a sealant for installation; immediately after its completion, you can begin to operate the pipeline. If necessary, you can create a branching of the pipeline, use the rotary elements supplied with the pipe in the kit.

The Stabil series is realized with the following dimensional parameters of pipes, where the first value is the outer diameter of the pipe, and the second is the wall thickness:

16 / 2.6 mm;
20 / 2.9 mm;
25 / 3.7 mm;
32 / 4.7 mm;
40/6 mm.

At the same time, the length of the manufactured products is 5, 50 and 100 meters, the second and third options can be cut into 10 meters. Its duration varies depending on the operating conditions. The following relationship, where the first is the operating temperature in ºС, the second is the operating pressure in bar, and the third is the guaranteed operating life in years, shows illustrative options:

20/35/50;
70/20/50;
95/15/5.

It can be seen from this that operation at maximum temperature conditions significantly reduces the service life.

Flex

Flex is a versatile pipe type. Unlike the Stabil type, it can be used in any type of heating, not just low temperature. The inside of the product is made with stitched PEX-Xa polyethylene, which is covered with ethylene vinyl alcohol, which protects from oxygen. This is the main difference between Flex and Stabil. Its task is to protect liquids from air penetration, otherwise the structure of the products is almost identical. Flex pipes are connected by means of special sleeves.

The Flex series is available with the following pipe dimensions, where the first value is the outer diameter of the pipe and the second is the wall thickness:

16 / 2.2 mm;
20 / 2.8 mm;
25 / 3.5 mm;
32 / 4.4 mm;
40 / 5.5 mm;
50 / 6.9 mm;
63 / 8.6 mm.

They are sold in lengths of 6 meters and in bays of 50 and 100 meters with the possibility of cutting into pieces of 10 meters. Operating conditions affect pipe life. What can be seen in practice, the approximate parameters are as follows, where the first is the temperature of the liquid in the system (degrees), the second is its pressure (bar), and the third is the warranty period under such conditions (years):

20/18,2/50;
70/10/50;
95/9/10.

His

The His line of pipes has a universal purpose, it is made of cross-linked peroxide polyethylene PEX-Xa. The pipes are painted white. They can be used in drinking water, hot and cold water pipelines, as well as in heating systems. His pipes are connected by means of sliding sleeves, which ensure a strong and tight connection.

The characteristic features of this type of product are as follows:

working temperature up to + 90ºС;
long service life;
minimum thermal expansion;
good memory of the material;
excellent strength and durability;
elasticity and flexibility;
inner coating prevents deposits;
simple and quick installation.

Rehau Rautitan His are sold in dimensional variations with an outer diameter of 16–63 mm in 6 meter segments, in bays of 50–100 meters with a diameter of up to 32 mm.

Target and universal pipes REHAU RAUTITAN for water supply, gas supply and heating systems

The line of innovative pipes REHAU RAUTITAN with the patented REHAU technology of connecting push-in sleeves and fittings made of polymer materials was launched by the production and commercial group REHAU AG + Co into serial production in 2009, focused on internal engineering systems of cold and hot water supply, including drinking and heating , and was immediately recognized by the jury at the international Design Plus 2009 competition at the Messe Frankfurt exhibition center for the level of design, usefulness, technical quality, environmental safety and sustainability.

For two years of development, the basic line of REHAU RAUTITAN was expanded with RAUTITAN gas stabil pipes for internal gas supply systems, in fact, allowing REHAU AG + Co to cover almost all engineering and technical support systems with RAUTITAN products (cold, hot water supply, heating, gas supply), to bring the brand RAUTITAN to the brand level and receive the prestigious Plus X Award in the categories "Innovation", "High quality" and "Functionality" at the ceremony in Cologne.

As of mid-2013, the REHAU RAUTITAN line is formed by the basic series of pipes - universal RAUTITAN stabil and RAUTITAN flex for cold (and drinking) / hot water supply and heating, target RAUTITAN gas stabil for gas supply systems, target RAUTHERM S for low-temperature panel heating systems, as well as RAUTITAN his target pipes for cold (and potable) water supply and RAUTITAN pink for high and low temperature heating produced by REHAU subsidiaries / factories in different countries.

Key features of REHAU RAUTITAN pipes.

In fact, REHAU RAUTITAN is a line of system solutions for fast and high-quality installation of water supply, heating and gas supply networks from universal and targeted pipes, RAUTITAN PX fittings from PPSU (polyphenylsulfone), RAUTITAN MX from brass, RAUTITAN RX from bronze, RAUTITAN SX from stainless steel , sliding sleeves RAUTITAN PX made of PVDF (polyvinylidene fluoride) and RAUTITAN MX made of brass, special fittings and accessories (see more details about fittings, fittings and sliding sleeve connections in this material). REHAU RAUTITAN pipes made of polyethylene cross-linked with peroxides (see here and this material) with a degree of binding of the molecular chain of more than 70%, due to the specificity of the molecular lattice, acquired a number of properties of thermosetting resins (the ability to self-heal after thermal and mechanical deformation, elasticity and high impact strength at low temperatures ) and therefore withstand the impact of a pile driver when tested at temperatures up to - 10 degrees Celsius, while polypropylene pipes fail, as well as short-term operating pressures up to 70 bar. At the same time, PPSU and PVDF fittings and push-in sleeves demonstrate impressive resistance to destruction, are convenient to work with and are absolutely safe for human health, which allows the use of PVDF sliding sleeve operative connections in drinking water supply networks, which significantly less affect the throughput and hydraulic resistance. piping than traditional press fittings, butt welding, welding or socket welding, typical (respectively) of HDPE pipes, polypropylene pipes (see this material), or PVC pipes (see gluing PVC pipes here).

Important: All REHAU RAUTITAN pipes for water supply systems (RAUTITAN stabil, RAUTITAN flex, RAUTITAN his) and RAUTITAN PX fittings from PPSU and PVDF are manufactured in accordance with the KTW recommendations for the content of impurities in drinking water, the German Federal Office for the Environment (Umweltbundesamt - Umweltbundesamt - Umweltbundesamt ), meet the requirements of the DVGW 270 standard (reproduction of microorganisms on materials for transporting and storing drinking water) and can be used in water supply networks of houses / premises / buildings with special hygienic requirements. Pipes of all diameters RAUTITAN stabil, RAUTITAN flex, RAUTITAN his, RAUTITAN gas stabil, RAUTITAN pink, RAUTHERM S and connection technology are registered in DVGW (Deutscher Verein des Gas- und Wasserfaches eV - German scientific and technical association for the gas and water industry), pipes are certified in accordance with the norms and requirements of German and international technical regulations, as well as the norms and requirements of national standards of different countries by well-known independent certification bodies.

Main characteristics of pipes RAUTITAN stabil, RAUTITAN flex, RAUTITAN his, RAUTITAN gas stabil, RAUTITAN pink and RAUTHERM S.

Characteristic	RAUTITAN stabil	RAUTITAN gas stabil	RAUTITAN flex	RAUTITAN pink	RAUTITAN his	RAUTHERM S
Material	PE-X / AI / PE	PE-X / AI / PE	PE-Xa in EVAL sheath	PE-Xa in EVAL sheath	PE-Xa	PE-Xa in EVAL sheath
Color (surface)	Silver	Yellow	Silver	Pink	Milky white	Red
Impact strength at 20 ° C	No kinks	No kinks	No kinks	No kinks	No kinks	No kinks
Impact strength at -20 ° C	No kinks	No kinks	No kinks	No kinks	No kinks	No kinks
Average coefficient of thermal elongation a, mm / (m * K)	0.026	0.026	0.15	0.15	0.15	0.15
a (mm / (m * K) when laying with a fixing groove for D 16 - 40 mm	—	—	0.04	0.04	0.04	—
a (mm / (m * K) when laying with a fixing groove for D 50 and 63 mm	—	—	0.1	0.1	0.1	—
Thermal conductivity, W / (m * K)	0.43	0.43	0.35	0.35	0.35	0.35
Roughness of pipes, mm	0.007	0.007	0.007	0.007	0.007	0.007
Working pressure (max.), Bar	10	0.1 (100 mbar)	10	10	10	6
Operating temperature (max.), ° C	95	70 Min. - twenty	90	90	90	90
Short-term maximum temperature, ° C	100	—	100	100	100	100
Oxygen diffusion according to DIN 4726	Protection	Protection	Protection	Protection	Not	Protection
Material constant C	33	33	12	12	12	12
Building material class	AT 2	AT 2	AT 2	AT 2	AT 2	AT 2
Maximum / minimum installation temperature, ° C	+45 / -10	+45 / -10	+45 / -10	+45 / -10	+45 / -10	+45 / -10
Minimum bending radius without aids (d = pipe diameter)	5 x d	5 x d	8 x d	8 x d	8 x d	5 x d
Minimum bending radius with spring liner / with tube bender (d = pipe diameter)	3 x d	3 x d	—	—	—	—
Minimum bending radius with pipe pivots (d = pipe diameter)	—	—	3–4 x d cold water supply 5 x d hot water supply and heating	5 x d	3–4 x d cold water supply 5 x d hot water supply and heating	5 x d
Available diameters, mm	16-40	20–40	16-63	16-63	16-63	10-32

Universal pipes REHAU RAUTITAN stabil.

RAUTITAN stabil pipes are constructed according to the PE-Xа / AI / PE scheme with a working inner tube made of HDPE cross-linked polyethylene with a degree of molecular chain binding of more than 70% according to DIN EN ISO 15875 and DIN 16892, an intermediate reinforcing aluminum layer, additionally acting as a barrier against oxygen diffusion, and an outer protective layer made of HDPE in RAL 9006 (silver) with laser marking of barcodes according to ISO 12176, traditional for REHAU AG + Co.

Delivery forms of pipes REHAU RAUTITAN stabil.

D [mm]	S [mm]	Volume [l / m]	Delivery form
16.2	2.6	0.095	Box / bay
20	2.9	0.158	Box / bay
25	3.7	0.243	Box / bay
32	4.7	0.401	Box
40	6.0	0.616	Box

RAUTITAN stabil pipes are focused on cold and hot water supply systems, including drinking, high-temperature and low-temperature radiator heating and fully meet the requirements of DIN EN 806-2, DIN 1988-200 and DIN EN ISO 15875-1, are registered with Deutscher Verein des Gas- und Wasserfaches eV in DVGW-Arbeitsblatt W 534 and DVGW-Arbeitsblatt W 270.

The requirements of DIN EN 806-2, DIN 1988-200 and DIN EN ISO 15875-1 for pipelines of hot water supply systems with a temperature of the transported medium of 70 ° C at a network pressure of 1 MPa (10 bar).

Operating temperature / operating time	70 ° C / 49 years
Maximum temperature / operating time	80 ° C / 1 year
Emergency temperature / operating time	95 ° C / 100 hours
In total	50 years

Due to the reinforcement, the thermal expansion of REHAU RAUTITAN stabil pipes is almost 5 times less than the thermal expansion of single-layer PE-Xa pipes, the pipes are fully adapted to connections with fittings and push-in sleeves made of polymers, fittings made of bronze / stainless steel and push-in sleeves made of brass using REHAU technology.

Important: For connections of REHAU RAUTITAN stabil pipes with diameters from 20 to 40 mm, it is possible to use alternatively brass and stainless steel fittings, marked in red or yellow (for heating and gas supply, respectively), as well as push-in sleeves made of brass with yellow marking (for gas supply) in combinations shown in the figure below.

Universal pipes REHAU RAUTITAN flex.

Universal pipes REHAU RAUTITAN flex two-layer made of working pipe PE-Xa (peroxide-crosslinked high-density polyethylene HDPE with a degree of molecular chain binding of more than 70% according to DIN EN ISO 15875 and DIN 16892) and an oxygen-tight outer layer according to DIN 4726 made of polyvinylethylene (EVOH) in RAL color 9006 (silver) laser-coded ISO 12176 barcodes.

Delivery forms for REHAU RAUTITAN flex pipes.

D [mm]	S [mm]	DN	Volume [l / m]	Delivery form
16	2.2	12	0.106	Box / bay
20	2.8	15	0.163	Box / bay
25	3.5	20	0.254	Box / bay
32	4.4	25	0.423	Box / bay
40	5.5	32	0.661	Box
50	6.9	40	1.029	Box
63	8.6	50	1.633	Box

REHAU RAUTITAN flex pipes are designed for cold and hot water supply systems, including potable, high-temperature and low-temperature radiator heating, meet the requirements of DIN EN 806-2, DIN 1988-200 and DIN EN ISO 15875-1, are registered with Deutscher Verein des Gas- und Wasserfaches eV in DVGW-Arbeitsblatt W 534 and DVGW-Arbeitsblatt W 270, fully adapted to fittings / push-in sleeves made of polymer, bronze / stainless steel fittings and push-in sleeves made of PVDF (polyvinylidene fluoride) up to diameters of 40 mm, bronze fittings and push-in sleeves made of brass in diameters of 50 and 63 mm according to the REHAU technology.

Important: For REHAU RAUTITAN flex pipe connections with diameters from 20 to 40 mm, it is possible to alternatively use stainless steel fittings marked in red (for heating), fittings and push-in sleeves made of brass marked in yellow (for gas supply) in the combinations shown in the figure below, as well as various trimming and flaring tools. Connections of REHAU RAUTITAN flex pipes with diameters of 50 and 63 mm are made only with bronze fittings and brass slip-on sleeves.

Target pipes REHAU RAUTITAN gas stabil for gas supply systems.

Target pipes REHAU RAUTITAN gas stabil - PE-Xa / AI / PE systems with a working inner tube made of peroxide-crosslinked high density polyethylene HDPE with a degree of molecular chain binding of more than 70% according to DIN EN ISO 15875 and DIN 16892, an intermediate reinforcing aluminum layer, additionally performing as a barrier against oxygen diffusion, and an outer protective layer made of HDPE in RAL 1018 (yellow) with laser-marked barcodes according to ISO 12176

Delivery forms of pipes REHAU RAUTITAN gas stabil.

D [mm]	S [mm]	Volume [l / m]	Delivery form
20	2.9	0.158	Box / bay
25	3.7	0.243	Box / bay
32	4.7	0.401	Box
40	6.0	0.616	Box

REHAU RAUTITAN gas stabil pipes are used for the formation of internal systems and inter-house distribution of gas supply networks, registered with Deutscher Verein des Gas- und Wasserfaches e.V. (DVGW approval certificate DG-8505BO0415) and are connected exclusively with fittings and push-in sleeves made of special brass with yellow marking.

Target pipes REHAU RAUTHERM S for low temperature surface heating / cooling systems.

Target pipes REHAU RAUTHERM S two-layer made of working pipe PE-Xa (peroxide-crosslinked high density polyethylene HDPE with a degree of molecular chain binding of more than 70% according to DIN EN ISO 15875 and DIN 16892) and an oxygen-tight outer layer according to DIN 4726 made of polyvinylethylene (EVOH) in RAL color 3020 (red) with laser-coded ISO 12176 barcodes.

Delivery forms of pipes REHAU RAUTHERM S.

D [mm]	S [mm]	Volume [l / m]	Delivery form
10.1	1.1	0.049	Bay
12	2.0	0.050	Bay
14	1.5	0.095	Bay
16	2.0	0.113	Bay
17	2.0	0.133	Box / bay
20	2.0	0.201	Box / bay
25	2.3	0.327	Box / bay
32	2.9	0.539	Box

REHAU RAUTHERM S pipes are designed to form panel heating systems (warm floors, walls) and / or cooling (floor, walls, ceiling) when connected to air-to-water, water-to-water, brine (or antifreeze) -water systems or systems reservation of thermal energy REHAU. Connections of REHAU RAUTHERM S pipes are made only with fittings and push-in sleeves made of stainless steel, although push-in sleeves made of special REHAU brass can be used in diameters of 12 mm.

Important: REHAU AG + Co recommends using:

special branded pruning tool (scissors and cutters);

special tools and nozzles for flaring, selected for a specific series of pipes of the RAUTITAN range of certain diameters;

proprietary tool kits RAUTOOL M1, RAUTOOL A3, RAUTOOL H2, RAUTOOL A-light2, RAUTOOL E3, RAUTOOL G2 for pipe connections RAUTITAN stabil, RAUTITAN flex, RAUTITAN his, RAUTITAN gas stabil, RAUTITAN pink, as well as kits RAUTOOL K10 x 1.1 or RAUTOOL K14 x 1.5 for RAUTHERM S pipe connections.

Rehau branded tool kits for sliding sleeve connections of RAUTITAN stabil, RAUTITAN flex, RAUTITAN his, RAUTITAN gas stabil, RAUTITAN pink - (from left to right) RAUTOOL M1, RAUTOOL A3 and RAUTOOL H2.

REHAU branded tool kits for sliding sleeve connections of RAUTITAN stabil, RAUTITAN flex, RAUTITAN his, RAUTITAN gas stabil, RAUTITAN pink - (from left to right) RAUTOOL A-light2, RAUTOOL E3 and RAUTOOL G2.

Kits of the original REHAU tool for connecting the RAUTHERM S slip-on sleeve - RAUTOOL K10 x 1.1 (left) and RAUTOOL K14 x 1.5 (right).

Target pipes REHAU RAUTITAN his for drinking water systems.

REHAU RAUTITAN his target pipes for drinking water systems, single-layer made of peroxide-crosslinked high-density polyethylene HDPE with a molecular chain bonding degree of more than 70% according to DIN EN ISO 15875 and DIN 16892, RAL 9010 color (milky white) with laser barcode marking according to ISO 12176.

Delivery forms of pipes REHAU RAUTITAN his.

D [mm]	S [mm]	DN	Volume [l / m]	Delivery form
16	2.2	12	0.106	Box / bay
20	2.8	15	0.163	Box / bay
25	3.5	20	0.254	Box / bay
32	4.4	25	0.423	Box / bay
40	5.5	32	0.661	Box
50	6.9	40	1.029	Box
63	8.6	50	1.633	Box

REHAU RAUTITAN his pipes are used only in drinking water supply systems, they have a DVGW DW-8511AP3133 permit for operation, certificates of conformity to DIN EN ISO 15875, DIN 16892, national GOST R and a hygienic certificate.

Target pipes REHAU RAUTITAN pink for low temperature surface heating systems.

REHAU RAUTITAN pink two-layer target pipes made of PE-Xa working pipe (peroxide-crosslinked high-density polyethylene HDPE with a molecular chain bonding degree of more than 70% according to DIN EN ISO 15875 and DIN 16892) and an oxygen-tight outer layer according to DIN 4726 made of polyvinylethylene (EVOH) in RAL color 4003 (purple heather) laser-coded ISO 12176 barcodes.

Delivery forms of pipes RAUTITAN pink

D [mm]	S [mm]	DN	Volume [l / m]	Delivery form
16	2.2	12	0.106	Box / bay
20	2.8	15	0.163	Box / bay
25	3.5	20	0.254	Box / bay
32	4.4	25	0.423	Box / bay
40	5.5	32	0.661	Box
50	6.9	40	1.029	Box
63	8.6	50	1.633	Box

REHAU RAUTITAN pink pipes are used only in radiator or panel heating systems, as well as in panel cooling systems (floor, walls, ceiling) when connected to air-to-water, water-to-water, brine (or antifreeze) -water heat pumps or redundancy systems thermal energy REHAU.

See the technique of connecting REHAU RAUTITAN sliding sleeve pipes, as well as fittings, sleeves, fittings and accessories for the installation of technical support systems from REHAU RAUTITAN pipes in this material.

Types of fittings for XLPE

Depending on the performance properties and design features, all fittings for cross-linked polyethylene are divided into groups according to the material from which they are made, according to design features and according to the method of installation. When choosing fittings, it is imperative to take into account the features of the piping system.

To Work With a XLPE Fitting

The material used to make such connections:

polyethylene;
polypropylene;
polyvinyl chloride;
from combined materials.

Manufactured designs of connecting elements:

couplings - used for on a straight section of the pipeline, they can connect pipes of both the same diameter and different ones;
elbows - used for corner joints or, if necessary, change the direction of flow in the pipeline;
plugs - needed to close the final section of the pipeline, if no further movement is envisaged;
tees - are used to connect three pipes or when it is necessary to branch the main flow of the pipeline;
bends are used to connect a new pipe section to an already installed pipeline.

According to the type of installation, the connections for cross-linked polyethylene are divided into:

for cross-linked polyethylene;
pressed fittings.

Features of the XLPE fitting

Compression elements made of sewn polyethylene are produced in a collapsible design. A good sealing of the structure is created by a plastic gasket and a union nut.

Press fittings are used where a permanent connection with high tightness is required. They are often used in high pressure pipelines.

Crosslinked polyethylene production method

Rehau cross-linked polyethylene is produced in two ways: using chemical reactions and hard radiation. The chemical method uses low density polyethylene plus foam catalysts, stabilizers and other chemical additives. After mixing in an extruder under high pressure and temperature, polyethylene molecules break and crosslink.

Irradiation of polyethylene with fast electrons leads to a modification of the internal molecular structure. During irradiation, the chemical formula of the substance remains unchanged, but cross-links are formed between neighboring molecules. As a result, the tensile strength is increased compared to conventional polyethylene.