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Advanced Radiant Design

For this purpose we prepared samples as indicators of varying degrees of purity were on the canvas within the requirements of technical conditions, that is no more than 2 vkl./mm2, Plastic and other options that are installed in existing PEX systems during the heating season in 2004 and 2005 in Chicago. After the end of this period will be investigated samples, including Cross-linked polyethylene tubing analysis and evaluation of corrosion properties of Plastics. According to test results may clarify technical requirements for high corrosion resistance of the pipes for PEX systems of heating networks, in particular, clarification of the minimum allowable density of the canvas. It can be assumed that commercial production of tubes of high corrosion resistance of new technical terms is an important step towards improving the durability and reliability of the heat network PEX systems. This is one of the first types of Cross-linked polyethylene pipe, manufactured with a guarantee of purity on the canvas, which is essential today for ensuring satisfactory resistance to corrosion of PEX systems, to prevent their failure in an abnormally short period of time. Further improvement of production technology and Plastic pipes, aimed at optimizing the chemical composition and microstructure of the Plastic, providing an even greater degree of purity of non-Cross-linked polyethylenelic inclusions, will further improve the corrosion resistance of the heat network PEX systems, will enable a greater degree of confidence to predict the timing of their safe operation. Conclusions: We show that the main factor determining the high rate of corrosion of Plastic in aqueous environments containing chlorides and sulfates, is the presence of a special type of Cross-linked polyethylene inclusions containing calcium, known as corrosion-active nonCross-linked polyethylenelic inclusions (Canvas).
Material properties change b / a Pipe

From the above data that the material properties of tubes is not so much change and, in spite of the huge pipe lifetime.

We know that the methods of inspection show a relatively high in terms of market b / y pipe percentage of defect-free pipes in PEX systems, even after prolonged use. Here we present excerpts from the published site article, which presents the results of investigations of changes in material properties of pipes for oil PEX system 25 years.

As the test material were selected structural Plastic 17G1S and 19d, which were used for the manufacture of pipes for PEX systems.
Samples of the same size for testing Plastics 17G1S and 19g were cut from the pipe diameter of 720 mm and 10 mm thick emergency reserve (baseline) and pipes, which are exploited in the PEX system for 25 years.


PEX connection radiant heating PEX pipe with oxygen barrier

Analysis of new technical requirements on the chemical composition of Plastics show their compliance with existing regulatory documents on the main elements (C; Mn; Si), while on the harmful impurities (S; P) in Plastics provide more stringent requirements. Since the sulfur content is reduced to 3 times for carbon Plastic and almost twice for low-alloy Plastics, twice reduced the phosphorus content in all the Plastics. In 2004, OAO “Vyksa” according to the TU 14-3R-71-2003 was made the first batch of longitudinal welded pipes size 530h8 mm of Plastic 20 for heating networks of “Wisbro PEX“. Melting of Cross-linked polyethylene produced at JSC “Severstal” in view of technological recommendations, providing production of Plastic with a minimum content of the canvas. In the Cross-linked polyethylene pipe study of specimens of Plastic melting was observed relatively high levels of purity are on the canvas: oxides, calcium, were absent and a density of inclusions containing calcium sulfide, averaged 1.8 vkl/mm2. The resulting density values ​​Canvas comply with specifications for Plastic pipe. Mechanical properties of Plastic tubes of this heat were:? A = 46,5-47,5 kgf/mm2? M = 26,5-27,5 kgf/mm2,? = 32-33%, KCU-40 = 10,5-11,4 kgsm/sm2, which corresponds to the requirements of construction norms and regulations TU 14-3R-71-2003. Continued work on development of the technology of Plastic production allowed in subsequent batches to reduce the density of inclusions containing calcium sulfide (KANV2), to values ​​of 0.5-0.7 vkl/mm2, with zero density of oxides of calcium (KANV1). In 2004 and 2005. conducted corrosion tests on samples of Plastic 20 with a low density of Canvas in operating conditions. PEX Tubing for use in radiant floor heating systems


Polypropylene Pipes and Fittings

Pipes and fittings made of polypropylene (PEX)

As a result, the polymerization of propylene and ethylene in certain proportions, as well as chains of molecules of ethylene in the mixed form of a material that defines the basic physical and chemical properties of pipes and fittings made from it. Pipelines, mounted in polypropylene, no rust, no rot, do not change the taste and chemical properties of the flowing fluid. Estimated length of service pipe is 50 years (cold water) and 25 (hot water). Depending on the operating pressure of the coolant temperature can reach 95 ° C. Perhaps short-term increase in temperature to 100 ° C.

High chemical resistance allows you to use polypropylene tubes for installation of technological pipelines and water treatment systems.

The main physical and mechanical properties of the material PPR-C (Type 3):

Pipes and fittings made of polypropylene PPR-C (Type 3) are used in cold and hot water in residential, office and industrial buildings, heating systems, water treatment, Air line and process pipelines.
Types of pipes

Polypropylene pipes PPR-C (Type 3) are available in three basic types:

PN 10 – for cold water pipes with a pressure of 1 MPa.
PN 20 – piping hot and cold water with the pressure at t = 20 ° C – 2.0 MPa at t = 75 ° C – 0.6 MPa.
PN 25 (Reinforced) – Piping hot and cold water and heating with the pressure at t = 20 ° C – 2.5 MPa
at t = 90 ° C – 1.0 MPa.

Lifetime of polypropylene pipes PPR-C in cold water is at least 50 years old, and hot water systems and heating systems at least 25 years.

Plumbing System Benefits
The main advantages of this system are:

· Reliability and durability. Properties that meet the requirements of SNIP 2.04.01-85 *.

• Full absence of corrosion and fouling of the pipe during operation.

• Large range of composite parts, valves and fasteners allows you to mount any wiring diagram.

Easy to increase the speed and pipeline installation is 5-7 times compared with metal, the lack of supplies and the need for preliminary preparations.

• Complete tightness of welded joints.

• High chemical resistance of pipes.

· Smaller (compared to metal pipes), the noise level of flow.

· Pipes do not require painting.

• System can withstand multiple cycles of freezing in the presence of pressure.

· Material meets the requirements of environmental safety and does not emit any harmful substances in the pipeline installation, or during operation.

PEX Piping

Design of piping systems connected to the choice of type of pipe, fittings and valves, hydraulic calculations, the choice of lining and conditions for compensation of thermal changes in length of the tube without the surge material and the joints of the pipeline.
Tube type

Select the type of pipe is subject to the conditions of the pipeline pressure, temperature, required service life and aggressiveness of the transported fluid. When transporting corrosive liquids should be used coefficients condition of the pipeline.

More information: Launches PEX-Al-PEX Tubing Product Line


Installation of a PEX water floor heating system

1. Subfloor is thoroughly cleaned of debris and gross irregularities and, if necessary, is aligned with the pouring of concrete or liquid sex.

2. On the prepared subfloor to lay the PEX tubing with slots for the heat pipe. Stacking plates made of PEX on the principle of mosaic and strictly on the project, it allows you to subsequently avoid the effects of convexity and concavity of the floor. Step placement of the heat pipe is also calculated at the design stage based on numerous factors such as general building heat loss, the presence and size of window openings, number of storeys of the building, etc. The total thickness of insulation layer (PEX + PEX additional grazing system) must be calculated thermal resistance, which is calculated during the design for a given object and is usually 40-80mm.

3. Stacking plates are also produced according to project into the grooves of PEX tubing . For uniform heating of the entire floor surface heat distribution plates should be covered at least 80% of the area.

4. Further, the aluminum plate falls so-called substrate of polyethylene foam or cardboard, it allows to smooth bumps formed between sites occupied by the plates and free from them.

5. Finally, this completes the system layer of gypsum fiber board or plywood, for which there is, consequences, and lays Finish coating.

This system of warm water sex is universal and can be mounted as a concrete base, and on the wooden floor, laid on wooden joists.

Wooden PEX heating System

There are two types of wooden grazing system:

wooden modular system
wooden rack type system

Universal property for both types is that they are used mainly in the construction of wood (timber frame) homes, ie, system laid directly on wooden joists or on rough ground. The main difference between the two types of wood systems: a modular type used ready-made elements (modules) of chipboard 22 mm is milled channels for plates and tubes of warm water floor, and in the rack type of conductive plate and pipe fit contours of floor heating between the strips or planks CPD .

Wooden water floor heating system of modular type

1. Strips 22 mm thick chipboard, their main purpose – fixing aluminum plates and the creation of a rigid surface. Heat insulator in the floor construction shall be provided in the overlap.

Band DSP fit in strict accordance with the draft heating system “PEX heating, with a gap of 20 mm.

In accordance with a specific step laying pipes (wide aluminum plates) are used chipboard strip width of 130, 180, and 280 mm.

2. Aluminum plates. The plate is teplosemnym and heat distribution element in the grazing system and has a special profile through which the plate is closely adjacent to the heat pipe and heat transfer is carried out more efficiently. Mounted in the gaps between the strips CPD.

Used aluminum plate width of 150, 200 and 300 mm

3. Pipe water floor heating. Snaps into grooves aluminum plates.

4. One layer GVLV (gypsum fibrous sheet, waterproof). GVLV to create a smooth surface on the aluminum plates and particleboard.

In the case of use as a finish coating or laminate flooring is not permitted to use gypsum fiber, pack finish coating directly on aluminum plates.

Wooden water floor heating system rack type

Unlike wooden modular system is used not ready elements (modules) with the grooves and the grooves are formed by laying strips (plates) with a thickness of at least 28mm distance (desynchronization) 20mm between them. The system is mounted directly on the joists (floor beams) with a maximum pitch lags 600mm (300mm when using ceramic tiles). The thermal insulation (mineral or basalt wool, PEX, etc.) is placed between the beams. In a system of wooden rack type thermal insulation layer is much thinner, so it is advisable to mount such as on the second floor of 2 storey cottage.

Apply heat distribution aluminum plates for step placement 150, 200 and 300 mm. In areas of greatest heat loss (the exterior walls, large windows, etc.) is applied, as a rule, step 150mm.

For every object is a project with the calculation load on the system of water heating, indicating the step size stacking units of water floor heating, the number of units, placement of reservoirs and distribution automation, with the table of balancing and tuning circuits and systems in general.


PEX Tubing for small warm floor project

Flow tubes for 1 m2 floor surface with a step of 20 cm is approximately 5 absorption. m. Due to the fact that, due to hydraulic losses in the system of floor heating water, the contour of the loop length over 100 m stack is not recommended, it is easy to calculate that for step placement of 20 cm can lay pipe on the area of ​​20 m2. Lots more space to heat several loops, each of which, in turn, connects to the distribution manifolds. Under a system of PEX heating, unlike electric, does not necessarily take into account the location of furniture. The fact that the power cord under furniture can overheat and fail, the coolant tubes of this dangerous deficiency deprived.

In the fourth phase installation of warm water floor, after the pipe installation (units) produce crimp PEX tubing heating system – this is a hydraulic test systems, pipelines, boilers and vessels leak. Pressing heating systems – a mandatory event, which takes place after the installation works, it allows you to make sure no damage pipes, which can be obtained in parallel work on repair facilities, elementary might break her or drop her something heavy … crimping is performed directly before pouring the concrete screed. Pouring the concrete screed is at room temperature, while the system is usually under pressure from 3-4 bar for 24 hours. It is recommended to leave the heating system under pressure to complete all installation of floor heating.

Screed in the warm water floor heat distribution is material. For the production of concrete ties are usually applied cement-sand mortar or peskobeton, recommended grade of concrete not less than the M-300 (B-22, 5). The thickness of the ties of warm water floor must be at least 30mm above the pipe. When the thickness of screed over 150mm require separate calculations of thermal conditions of heating panels with the introduction of special correction factors.

For reference: the weight of 1 sq. m. ties at a thickness of 50 mm is 250-300 kg.

Include a system of floor heating water can only after a full gestation solution (for compositions based on cement, this process takes at least 28 days). It was only after the solution was completely pick up strength, should be gradually and smoothly increase the temperature of water in the system – with a gradual release of the operating mode for three days.

At the final stage Finish coating is placed over concrete screed. Particular attention should be given material that should have the coefficient of heat transfer resistance is not more than 0,15 m2 • K / watt. With ceramic plates and other similar materials no problems, and materials such as flooring, carpet and resilient coatings must have a special designation, designed for floor heating systems, ie, underfloor water.

If the use of concrete (sand-cement screed) is not acceptable, due to limited height space, wet process, critical periods of work and / or unacceptable significant increase in load on the floor, there will grazing system of water tepplogo sex.

Grazing system of water floor heating – the main difference between grazing systems on the concrete, is the absence of wet-process, which significantly reduces the installation time and provides immediate system ready for operation after installation. Slub system suitable for all types of buildings (supporting structures), including for wooden houses. Grazing system, in turn, is divided into two systems, polystyrene and wood.

Polystyrene system of water floor heating – the easiest (by weight) The current system of warm water floor. The system is based polystyrene plates 30h300h1000 with grooves (straight and turning), in which are embedded aluminum heat distribution plate. To evenly distribute heat from the pipes all over the floor in the grazing systems used aluminum plates for the stacking step 150 and 300 mm. They are metal plates with a slot for a heat pipe made of aluminum 0.5 (0.4), h270 (130) h1200mm. The plates have a special profile for a snug fit to the pipe. Aluminum plates stacked (without glue) to polystyrene plates with grooves. On the flatness of the floor slab is placed “Finish” flooring. Parquet (plain or laminated) 9-22 mm thick is placed directly on the aluminum plate through a moisture-absorbing pad of paper or polyethylene foam. If you use linoleum coverings, ceramic tiles or tiles of PVC should be first on the aluminum plate to put plate GVLV (elements of sex) with a minimum thickness of 10 mm.

Components of polystyrene heating system:

  • base (ground) floor
  • plastic film
  • polystyrene plate with grooves for the pipes are designed to prevent heat loss down
  • pipe for hot water floor heating
  • aluminum heat distribution plates
  • gypsum fiber layer (gypsum fiber sheet, moisture resistant) or plywood

Noteworthy properties of polystyrene:

  • There is no wet process, in contrast to concrete systems
  • The system is ready for operation right after installation
  • The minimum height of 50 mm
  • Load of 30 kg / m ²

Floor heating system with PEX tubing

Pouring concrete is carried out after mounting the contours of water floor heating and testing activities. The thickness of the screed must be at least 30mm above the pipe, grade of concrete is not recommended below the M-300 (B-22, 5). In special cases (big weight and / or thermal loads on the heating plate, etc.), the thickness and grade of concrete ties is calculated by designers based on the properties of the object (in this case required separate calculations of heating panels). The minimum thickness of screed (30mm above the pipe) is due primarily not the strength characteristics, and to achieve uniformity of temperature distribution on the surface of the heating panel.

When the thickness of screed over 150mm require separate calculations of thermal conditions of heating panels with the introduction of special correction factors.

For reference: the weight of 1 square ties with a thickness of 50 mm is 250-300 kg.

The greater the thickness of the tie the more time is required to display it on a stable heating regime from power on.

The thicker screed the more innertsionnost system PEX tubing.

The lower the thermal conductivity of the tie, the higher the required flow temperature.

If expansion joints, in connection with long heating panel, it is divided (every 15 meters) on the areas of compensation joints, the pipes crossing the back-seam, laid in a protective corrugated tube (at 300 mm left and right of the seam extension). Recommended to lay heating circuits intact within a single area of compensation, ie, expansion joints should intersect only pressure and return lines of the contour.

Radiant system PEX tubing permits the use of any of plasticizers in the concrete. Widely used in modern construction has received a device with a plastic tie fiber.

To speed up the drying process of concrete slab, which usually takes about 3-4 weeks, and reach an acceptable level of relative humidity, you can connect the Radiant floor to the heat source (including the interim scheme). Recommended coolant temperature in this case should not exceed 30 ° C. The practice of applying water floor heating system PEX tubing using mode “drying” has shown many examples of reducing construction time, especially at sites with large areas.

Relative humidity of the concrete should not exceed 85%. In the case of parquet or other wooden cover, relative humidity must not exceed 60%. Anyway, you should follow the instructions of manufacturers and suppliers of materials, as well as to comply with construction technology and production work. Thus, generally requires 2-4 weeks from the time of pouring concrete screed before laying finishing coating.

23 90% Daily 2010-11-22 16:34

BOW plumbings PEX  accessories complete a full cycle of production at the company: starting with the design and ending with strict quality finished products. 90% Daily 2010-11-17 16:47

Unlike other companies engaged in the production of BOW plumbings, the company specializes only in PEX watering can shower and bath accessories.

That is why they are leaders in their industry, since the constant improvement of product quality and the desire to seek new forms of production allowed to bring to perfection. 90% Daily 2010-11-02 19:57

This is confirmed by annual external examination: once a year in production is in full control to confirm the certificate UNI EN ISO 9001/2000. Today, the BOW plumbing brand PEX is synonymous with quality, not only in Canada but throughout Europe. 90% Daily 2010-11-22 16:28

Attention to detail and hand built in watering cans, racks, shower columns and systems have a great sense of style, and are intended to give, including aesthetic enjoyment. 90% Daily 2010-11-02 18:56

This is the main distinguishing feature of the BOW plumbing PEX. 90% Daily 2010-11-17 16:57

When it comes to Italian design PEX have in mind a refined and sophisticated watering for the soul and bathroom accessories.

If you want to turn your bathroom into a relaxing resort area, you will help the Italian plumbing firm PEX.

Attention to detail and hand built in watering cans, racks, shower columns and systems have a great sense of style, and are intended to give, including aesthetic enjoyment.

This is the main distinguishing feature of the BOW plumbing PEX. 90% Daily 2010-10-06 18:48 90% Daily 2010-10-06 18:41

Company PEX , founded in 1960 by brothers Leonardo and Massimo today represented in 75 countries. In USA, the BOW plumbing PEX  brand came in 1998. 90% Daily 2010-10-11 14:43 90% Daily 2010-10-11 14:39

PEX currently consists of six production sites in Canada and commercial association in Spain on an aggregate area of 60.000 m2. 90% Daily 2010-10-22 21:37 90% Daily 2010-10-22 21:35

In addition to the beautiful appearance of the PEX plumbing is of high quality. Sometimes it happens, sanitary ware that can crack, but not the Italian sanitary ware plumbing. PEX plumbing is not covered by small cracks in the force strength of the material. It is this special concern for the master of PEX plumbings and use only the best varieties of ceramics and glass. 90% Daily
PEX plumbing is of high quality 90% Daily 2010-10-06 18:36
PEX plumbing is of high quality

Only a master of Italian design guarantees quality for years to come. To this end, the PEX plumbing is constantly exposed to various studies and tests. And it only after checking the production of Italian design goes to the shops.


Why is it so popular with the PEX plumbing? It is considered that the PEX plumbing – a measure of good taste, as an PEX plumbing, is usually produced in hand-creative people. In the Italian masters desire for beauty and perfection in everything we traced at all times. PEX plumbing Daily 2010-10-06 18:25 PEX plumbing Daily 2010-10-06 18:08 PEX plumbing Daily 2010-10-06 18:06 90% Daily 2010-10-06 18:04 PEX plumbing Monthly 2010-10-06 14:51 PEX plumbing Monthly 2010-10-06 14:47 PEX plumbing Daily 2010-10-04 22:08 90% PEX plumbing 2010-10-04 21:56 PEX plumbing Daily 2010-10-04 PEX plumbing 90% PEX plumbing PEX plumbing -10-04 21:51

Today, when the facility has ceased to be a small closed space apartments, the designers the opportunity to work on this room, namely, to apply the PEX plumbing. All know that the most important thing in the bathroom – a toilet, bidet and washbasin and leadership on this issue is an PEX plumbing. With a sleight of Italian masters manages to combine in their products with the necessary practicality with creative design solutions.