Metallo plastic pipes(MPT) are used to replace damaged steel pipes and laying water pipes in a house or apartment.

From the article you will learn about the advantages and disadvantages of this material, the design of pipes and methods of their installation.

How does a metal-plastic pipe work?

MPT consists of 5 layers:

1. Inner plastic layer made of polypropylene or cross-linked polyethylene.
2. Adhesive connection.
3. Aluminum foil.
4. Second adhesive connection.
5. Outer plastic layer made of polypropylene or cross-linked polyethylene.

Characteristics of MPT

Polypropylene, polybutene and cross-linked polyethylene are used for the inner and outer plastic layers. These materials can withstand temperatures up to 95 degrees, are resistant to aggressive substances dissolved in water, and do not corrode or oxidize.

The smooth inner surface of the pipe reduces the likelihood of salt and dirt deposits forming. The aluminum layer protects the inner plastic layer from destruction due to contact with oxygen or ultraviolet radiation. The strength and maximum pressure of the pipe depend on the material and workmanship of the inner layer.

Pipes that are produced in Russia or officially supplied from abroad have a certificate of conformity. Before you buy pipes, ask to see it. If the pipe does not have a certificate, it was made in violation of technology or was imported illegally. Such pipes are less reliable.

The pipe is marked with the following information:

1. Manufacturer.
2. Outer diameter and wall thickness. The pipe size must correspond to the table of diameters specified in GOST R 52134-2003 and be 16, 20, 25, 32 mm.
3. Pipe material: PP-R – low-temperature polypropylene (up to 60 degrees); PE-R – polyethylene (up to 40 degrees); PE-RT – high-temperature polyethylene (up to 60 degrees); PE-X – cross-linked polyethylene (up to 95 degrees); PE-X a,b,c,d – type of cross-linking of polyethylene. Does not affect performance.
4. Nominal pressure. It is indicated after the letters (PN) in atmospheres (bars). By nominal we mean the highest pressure at which the service life of the pipe corresponds to the declared one and the pipe does not collapse.
5. Production standards, GOST, TU, EN ISO or DIN number.
6. Badge of compliance with Russian standards (for pipes produced in Russia).
7. Date of manufacture.

Well-known and popular manufacturers receive a certificate for their products and mark the pipes with a symbol of compliance with Russian Federation standards or an indication of a specific GOST or TU. If the marking of a pipe from a well-known manufacturer does not indicate this, then the pipe is either a fake, or a product for another country, which for some reason was not put on sale there.

How to choose an MPT for water supply to a house or apartment

First, decide whether you will make cold and hot water supply (DHW) from the same type and size of pipes or purchase pipes for cold water supply (CWS) at a lower price. At water temperatures up to 40 degrees and pressure up to 5 atmospheres, the operational properties of any MPT are the same. In these conditions, an inexpensive pipe made of low-temperature polyethylene is as reliable and efficient as a pipe made of cross-linked polyethylene or polypropylene. For DHW use pipes marked PE-X.

Determine the required inner diameter each section of the water pipeline. After this, look at the dimensions of the pipes at your nearest store and determine their internal diameter. To do this, subtract double the wall thickness from the pipe diameter. If the inside diameter is 15 to 20 percent smaller, use the next size pipe.

This calculation is inaccurate, so it is possible that the water pressure in the tap may decrease or you may overpay for the material. For an accurate calculation taking into account all factors, contact a water supply engineer.

If you calculate the pipe diameter yourself, use the following rules:

1. To connect from the collector to the tap, use a pipe with a diameter of 16 mm.
2. For a collector to which 2-3 taps are connected, use a pipe with a diameter of 20 mm.
3. For a riser or pipe to which 2-3 collectors are connected, use a 26 mm pipe.
4. To supply water to 2-3 apartments or houses, use a pipe with a diameter of 32 mm.

Determine the type of fittings. If you have the equipment to install press fittings, use them. If you don't have the equipment, use compression fittings.

Buy pipe and fittings from the same manufacturer.

Features of installation of metal-plastic pipes

Do not use pipes made of low temperature material for hot water supply. They will sag, the tightness of the connections will be broken, and the water supply will fail in 2-3 years. On the lower floors multi-storey buildings water pressure reaches 5 atmospheres (bar). If you live on the lower floors of a multi-story building, use MPT high pressure(over 10 atmospheres).

Before installation, check that the fittings are complete. Do not use fittings if at least one is missing rubber compressor. When installing fittings, do not use sealants - tow or FUM.

If the connection leaks, it was not assembled correctly or was not tightened enough. When compression fittings leak, tighten the nut half a turn. If the leak continues, remove the fitting and check the presence of rubber O-rings and the smoothness of the pipe end. If necessary, cut 0.5-1 cm of pipe or replace the fitting. If it flows compression fitting, crimp it again, turning the pliers 90 degrees.

When designing a hot water supply system, do not forget about the thermal expansion of the MPT. To avoid sagging pipes and damage to connections, fasten pipes to the wall every 30-40 cm and arrange expansion loops to reduce the effect of thermal expansion.

Pros and cons of using metal-plastic pipes

Compared to steel pipes, MPT is easier to install and repair, cheaper and more reliable. For connections, they do not use welding and threading, but ready-made fittings. Compared to plastic pipes (PVC, polypropylene, ordinary and cross-linked polyethylene), they are less sensitive to oxygen and ultraviolet radiation. Unlike polyethylene and polypropylene pipes, are afraid of sub-zero temperatures.

After 3-5 cycles of freezing/thawing of water, the pipe bursts. Compared to copper and corrugated pipes of stainless steel, MPTs are cheaper and easier to install, but less reliable.

At making the right choice pipes, compliance with installation technology and operating conditions, MPTs operate without damage for thirty years.

The right choice of MPT – required condition for reliable water supply. From the article you learned how high-quality pipes differ from fakes and counterfeits, what temperatures they can withstand, and how to determine the quality of a pipe by marking. Now you can choose for yourself the necessary pipe with the required technical characteristics and accessories for it.

Coated steel pipe design:
They are steel pipes or sections of welded steel pipes with an outer polyethylene (2 or 3 layer) coating, lined inside polyethylene pipe, secured with corrosion-resistant steel lugs. When constructing pipelines, the tips allow making welded connections according to traditional technology– using electric arc welding.

Range of products:
MPT range from 89 mm to 325 mm;
Possibility of manufacturing MPT with a length from 1 to 33 m.

Application area:
MPT pipes are intended for the construction of the following pipelines:

• pipelines for transporting reservoir, product and fresh water in reservoir pressure maintenance systems (RPM);
• pipelines for transporting aggressive media in the chemical, petrochemical, and oil refining industries, to which polyethylene is chemically resistant.

Advantages:
The advantage of using metal-plastic pipes in oil field pipelines compared to steel pipes without internal covering, is as follows:

• service life increases several times;
• the increased reliability of a pipeline constructed from metal-plastic pipes can significantly reduce the pipeline accident rate;
• the throughput of pipelines does not change over the years of operation;
• pipes are protected from the corrosive effects of the atmosphere at the stages of transportation, storage and installation without any additional measures.

Specifications:
TU 1394-002-05608841-2002; TU 1390-175-00147588-2008
For the manufacture of MPT, steel pipes are used from steel grades 20, 10 group B according to GOST 8731-74, 10705-80 and 20295-85. By agreement with the customer, pipes made of other steel grades and manufactured to other standards can be used.
Maximum permissible temperature transported medium no more than +60°C.
Climatic modification UHL, placement category during operation 5 according to GOST 15150.
The working pressure of the MPT is determined by the accepted calculation method as for uncoated steel pipes according to SNiP 2.04.12.86 “Strength calculation steel pipelines", but without corrosion additives - this is at least 2 mm.

MPT (MPT-K) are a section of steel pipes, including an internal lined shell made of high-density polyethylene or polyethylene low pressure, external polymer anti-corrosion insulation.

Steel pipes or sections of steel pipes lined with a polyethylene sheath are intended:

• for the construction of technological pipelines;
• development of oil fields;
• transportation of oil, aggressive Wastewater and mixtures thereof;
• transportation of fresh water in water supply systems;
• transportation of various media from the chemical, petrochemical, and oil refining industries, to which polyethylene is chemically resistant.

List of MPT products manufactured

Metal-plastic pipes from 1 to 33 m long:

• MPT 89x4, MPT 89x7;
• MPT 11x4.5, MPT 114x9;
• MPT 114x10, MPT 114x12;
• MPT 159x6, MPT 159x12;
• MPT 168x14, MPT 168x16;
• MPT 219x8, MPT 219x20;
• MPT 273x9.

External insulation of pipes D from 89 to 325 mm, length from 1 to 33 m.

Steel and metal-plastic bends:

• 89x7;
• 114x9, 114x10;
• 114x12, 159x12.

Polymer-protected tees:

• 89x4, 89x7;
• 114x10, 114x12;
• 159x6, 159x12.

See also:

MPT production technologies

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Instructions for the construction, operation and repair of pipelines from MPT

These pipes first appeared in England in the 70s. last century, where they were invented for the needs of the Royal Navy. On ships and submarines there are a large number of pipelines for various purposes, the placement of which in confined spaces required enormous amounts of labor and time. The jewelry work of a ship's plumber required the highest level of experience and skill.

In the phantasmagoric interweaving of pipes, cables, ducts and structural elements, the plumber first had to bend an incredible trajectory of the pipe axis from a piece of aluminum wire, and then use this template to make the workpiece itself. The slightest inaccuracy and all the work goes down the drain.

Attempts to use pipes made of ordinary cross-linked polyethylene (PEX) were unsuccessful: bending such a pipe required the use of a construction hair dryer; the pipe did not hold its given shape and sagged greatly when the temperature changed; besides, plastic was to the taste of ship rodents... Appearance metal-plastic pipes, in which a layer of aluminum enclosed between layers of cross-linked polyethylene eliminated all of these disadvantages from plastic, was a true breakthrough in the industry.

For some time the British kept their invention in top secret, but rumors about the “wonderful” pipe and its samples leaked into the bowels of the Navy Department, and the inventors had no choice but to sell their patent to Germany, Israel and a number of other countries. Thus began the triumphal march of metal-plastic pipes around the world. Thanks to your unique properties and availability, these pipes are inexorably replacing other types pipeline systems from the internal arsenal engineering equipment buildings.

Avalanche-like growth in demand for metal-plastic systems, naturally gives rise to the appearance large quantity manufacturers of elements for these systems. Already on the Russian market there are about 60 brands of metal-plastic pipes and about 40 types of fittings. At the same time, a single state standard there is no price for these products, so pipes may vary in wall thickness and thickness of individual layers, layer material and their temperature and mechanical resistance. Under these conditions, it is difficult even for a specialist to answer the question of which fitting will fit which pipe, if these products are made by different manufacturers.

And it’s easy to miss the tool during installation: there are about 20 press attachments for making press connections (G, H, HA, M, U, S, V, SV, TH, HE, etc.). Of course, you can rejoice in abundance and freedom of choice, but in this motley “carnival of metal-plastic systems” in Lately Alarming symptoms began to appear.

Products appear with distorted initial information about the temperature and mechanical resistance of the pipe and the material of its layers. But first, it is advisable to find out what information should be printed on a metal-plastic pipe and what it should mean. In the absence of a Russian GOST for metal-plastic pipes, GOST R 52134-2003 “Thermoplastic pressure pipes and connecting parts for them for water supply and heating systems” is used.

In accordance with clause 4.5 of this GOST symbol pipes should include the following information - see table. 1. This table requires some explanation.

M.R.S.(MPa) is the minimum long-term strength, numerically equal to the stress in the pipe wall, arising under the action of constant internal pressure, which the pipe can withstand for 50 years at a temperature of 20°C. The value ≫ given in the table shows that the stress in the pipe wall is 10 MPa.

SDR- standard dimensional ratio, numerically equal to the ratio of the nominal outer diameter of the pipe to the nominal wall thickness. The result is rounded to the nearest standard value(5; 6; 7.4; 9; 11; 13.6; 17; 17.6; 21; 26; 33; 41). The service class shows under what standard conditions the pipe can be operated. Each class corresponds to a certain combination of time periods with different temperatures of the transported medium (Fig. 1).

Operating mode is a combination of time periods and temperatures determined by the application. It is these parameters that set one of six operating classes:

• HV— cold water supply;
• Class 1— hot water supply up to 60°C;
• Class 2— hot water supply up to 70°C;
• Class 3- low temperature underfloor heating With maximum temperature up to 50°C;
• Class 4– high temperature underfloor heating and low temperature radiator heating with temperatures up to 70°C;
• Class 5— high-temperature radiator heating with temperatures up to 90°C.

Maximum operating mode strictly limited in time. For heating systems, this mode is usually calculated. This can be explained with an example. For St. Petersburg, the estimated outside air temperature for heating is -26°C. The duration of this calculation period in accordance with SNiP 23-01-99* “Building Climatology” is five days a year, or 250 days in 50 years.

At average temperature heating season-1.8°C and its duration is 220 days per year, it can be calculated that at a coolant temperature of 60°C the pipe will last for about 30 years over 50 years of operation. These conditions correspond to the 5th class of operation.

Emergency mode provides for short-term (no more than 100 hours in 50 years) exposure to the indicated in Fig. 1 temperature, which may be caused by some technical problems in system temperature control. Let us remind you once again that all of the above follows from the standards for plastic pipes, since there are no current standards for metal-plastic systems, except for two sets of rules (SP 41-102-98 “Design and installation of pipelines for heating systems using metal-polymer pipes” and SP 40 -103-98 ≪Design and installation of pipelines for cold and hot water supply systems using metal-polymer pipes≫).

In Europe the situation is approximately the same. There is a standard for the installation of composite (PEX-AL-PEX and PE-AL-PE pipes IS 28-2003 (Installation Standard), but there is no standard for metal-plastic pipes themselves. Most European and Asian manufacturers are guided by the American standards ASTM F 1281 and F 1282 It is in accordance with these standards that the maximum operating pressure and maximum temperature.

Thus, if 10 bar and 95°C are written on a metal-plastic pipe, this does not mean that the pipe is capable of being at this pressure and temperature for 50 years. In the general case, we can guarantee that the pipeline will be able to be operated continuously without problems for a year at the specified parameters, and its further fate depends on the relaxation schedules (Fig. 2).

These graphs are calculated using the Kessel formula for most composite pipe materials used and show how the reference tangential stress in the pipe wall, which occurs under the influence of internal pressure, decreases over time (Fig. 2). Using these graphs, it is possible to calculate with a sufficient degree of accuracy what overpressure this or that pipe will withstand after a certain period of time.

For example, a PEX-AL-PE metal-plastic pipe with an outer diameter Dn = 16 mm, with a wall thickness d = 2 mm, transporting liquid with a temperature of 95°C, can withstand excess pressure during the initial period of operation:

After 50 years of constant operation in this mode, the maximum excess pressure will drop to the following value:

In the formula used σ the tangential stress value in MPa, taken from the relaxation graph (ordinate axis). I would especially like to focus on composite pipes using heat-resistant polyethylene PERT. PERT-ALPERT pipes are cheaper than PEX-ALPEX pipes and this alone immediately found their ardent followers. But the consumer should take into account the following subtleties: PERT, despite the increased (compared to conventional polyethylene) thermal resistance and strength, remains a thermoplastic material.

This means that the material begins to soften at a temperature below the destruction temperature. Thanks to the lateral octene “branches,” the macromolecules are closely “intertwined” with each other, but chemical bond there is no interaction between these macromolecules. One can say about this material: “No longer polyethylene, but not yet PEX.” The relaxation graphs show that all thermoplastic materials (HDPE, PP, PB, PERT) have a “breaking point” in the graph, after which the process of reducing the strength of the material begins to accelerate.

The use of thermoplastic materials for heating systems is not recommended, i.e. they can only be used in operation classes 4 and below. Individual technical specifications are developed for pipes manufactured in Russia. Thus, VALTEC metal-plastic pipes are produced according to TU 2248096-00284581-2005; Liral pipe - according to TU 2248-03600203536-97, pipes from the Metallopolymer plant - according to TU 2248-036-0761418-2003.

The technical specifications clearly stipulate the requirements for labeling and quality control of the manufactured product. In the last year or two Russian market is experiencing an influx of metal-plastic pipes and fittings produced in Asia. Along with products of good quality, there are pipes that will certainly upset their customers. Troubles may not arise immediately after installing the system, but they cannot be avoided.

The fact is that often the information indicated in the marking on the pipe is blindly copied from a product from a completely different manufacturer and often does not correspond to the actual materials used and operating conditions. In the laboratory of complex testing of elements engineering systems Valtek LLC (LaKIELIS) ​​conducted studies of several samples of metal-plastic pipes for compliance with the characteristics stated on the marking.

The results of these studies are tabulated without indicating brands. As can be seen from table. 2, for only one sample out of six, the information printed on the pipe was completely true. But even for this sample, the degree of cross-linking of polyethylene was only 20% instead of the required 65%. This means that the pipe is not finished product, but a semi-finished product.

Of course, after lying in a warehouse for 2-3 months, such a pipe will “reach” the required degree of cross-linking, but if it is installed before this period, then leaks in the connections are inevitable, because As the degree of crosslinking increases, the density of PEX decreases slightly. Reputable suppliers do not allow this kind of attitude towards consumers. For example, at Valtek LLC (St. Petersburg), the extrusion line ends with a hydration section, where water at a temperature of 90°C is pumped through the finished pipe for 5-12 hours (depending on the diameter).

And only after laboratory testing of all indicators provided for technical specifications, the product is sent for sale. Of course, it is impossible for the average consumer to assess how well the information indicated on a metal-plastic pipe corresponds to real data. However, there is a not very difficult way to determine at least the actual material of the pipe layers.

To do this, cut pipe fragments (rings 1-1.5 cm wide) must be placed in a muffle furnace or oven and kept at a temperature of 130°C for 15 minutes. If geometric parameters layers will remain unchanged, then this is cross-linked polyethylene (PEX).PERT decreases somewhat in volume, as evidenced by the “melted” end surfaces of the layer. Non-crosslinked polyethylene (PE) will shrink significantly in volume.

The samples shown show the behavior of PEX-AL-PEX pipe samples during high-temperature heating (Fig. 3); PERTALPERT (Fig. 4) and PEX-AL-PE (Fig. 5). The samples shown in Fig. 3 and 5 can be safely used for heating systems, and the pipe shown in Fig. 4, will not last long in such systems. Due to the fact that the outer layer in a metal-plastic pipe is protective (it protects aluminum from exposure alkaline environment mortar mixtures), then the use of PEX in it is considered inappropriate.

A pipe with an outer layer of non-crosslinked PE bends much easier and has better resistance to ultraviolet radiation than PEX. In conclusion, I would like to remind you once again that you do not need to buy a pipe, but a system that also includes connectors and the necessary installation tools. Only in this case will you be sure that the installed system will last for many years.

Polyethylene couplings MPT-1, MPT-3 are used in construction cable duct for joining non-pressure asbestos-cement pipes using the tension method.

• MPT-1 coupling for free-flow asbestos-cement pipe Ø100
• MPT-3 coupling for free-flow asbestos-cement pipe Ø150

MPT polyethylene connecting couplings with diameters Ø200; Ø300; Ø400 are used for connecting free-flow asbestos-cement pipes during the construction of storm sewers.

Mode of application. The MPT coupling is a heat-shrinkable coupling. Therefore, for the tightest connection of free-flow asbestos-cement pipes, before joining, couplings For softening, MPT is heated in hot water at a temperature of up to 90-100 degrees Celsius for one to two minutes. It is also permissible to warm up the MPT couplings blowtorch at least a minute. After connecting the pipes, the polyethylene coupling MPT is compressed and, due to elastic deformation, tightly joins the asbestos-cement pipes. The average service life of an MPT coupling is 15 years.

The MPT-1 Ø100 coupling, as well as the MPT-3 Ø150 coupling, in some cases can be used for joining technical HDPE pipes with Ø110 and Ø160 mm diameters; shrinkage of MPT couplings occurs according to the method of asbestos-cement pipes.

Name		Price including VAT rub. per piece OPT	Price including VAT rub. per piece RETAIL
POLYETHYLENE HEAT-SHRINKABLE COUPLINGS (MPT)
	Coupling MPT-1 Ø100	30,00	40,00
	Clutch MPT-3 Ø150	35,00	50,00
	MPT coupling Ø200	95,00	150,00
	MPT coupling Ø300	150,00	250,00
	MPT coupling Ø400	220,00	330,00

When ordering MPT couplings from 1000 pieces at a time, special prices apply.

Metal-plastic pipe "Liral" (information about the manufacturer, specifications, prices)

The Liral metal-plastic pipe (MPT) is a successful five-layer combination that combines everything best characteristics metal and cross-linked polyethylene (PE-Xb). The central layer (MPT) of the pipe is aluminum foil, welded with an overlapping longitudinal seam, which gives additional benefits in terms of strength before butt welding previously used foil. The purpose of aluminum is to give the pipe dimensional stability and reduce the coefficient of thermal expansion, the high value of which is negative quality for all polymers. Thanks to the aluminum layer, the walls (MPT) are not subject to oxygen diffusion, which occurs in pipes made of any plastic. The aluminum and plastic layers are bonded together with a special heat-resistant adhesive material, which prevents delamination of the combination when high temperatures due to the difference in linear elongations of system elements. The hardness and strength of metal are combined in (MPT) with the flexibility of plastic hoses. They are not afraid of corrosion or frost; they can be bent by hand and fixed in any position.
The smooth polyethylene surface inside (MPS) has a reduced coefficient of friction, which eliminates various types of deposits on the walls and creates conditions for liquid flow that are close to laminar. Therefore (MPT) is capable of passing 20% ​​more liquid than a metal one of the same cross-section. Walls (MPT) absorb noise arising in water supply systems. External surface(MPT) is little susceptible to the formation of condensation characteristic of metal pipes, therefore they can be used in contact with wooden or plasterboard structures, in internal spaces buildings and even under false streams.
The service life (MPT) is 30% longer than that of copper, the inner walls of which are susceptible to various types of deposits. At the same time (MPT) is an order of magnitude lighter in weight and very compact for transportation.
The pipes are resistant to aggressive environment and many chemicals, can be used to transport some acids, alkalis, etc.

The Liral pipe is produced using German technology on the equipment of Unicor (Germany), a world leader in the production of metal-plastic pipes, using only imported materials (England, Canada, USA, Italy).
The quality of our products is confirmed by all necessary certificates.
The production is equipped with a complete laboratory from IPT Germany. Pipes are produced according to specifications that fully comply with German DIN and DVGW standards.
In December 2004, we passed the international quality certification ISO 9001-2000 from the British Standards Institute BSI.
MPT-Plastik LLC has been producing and selling metal-plastic pipes for more than eight years, and during this time we have not received a single complaint about our products, because We put quality first.
We produce pipes in four diameters: 16, 20, 25, 26 millimeters.
16 - used for wiring around the apartment hot water, For heated floors, for a single connection to batteries.
20 - mainly used for heating systems, where a cascade of batteries is installed, and it is necessary to ensure better water permeability.
25, 26 - are used for risers and, in addition, are used where allowed increased consumption water.
The quality of our pipes is also constantly checked by our foreign partners, incl. suppliers of raw materials. The latest inspection was carried out by the supplier of cross-linked polyethylene, the Italian company SOLVEY PADANAPLAST, part of BP (England). Check confirmed high quality Liral pipes.
Together with GOSSTROY of the Russian Federation (now the federal agency for housing and communal services) and the Mosstroy Research Institute, we are completing a three-year inspection of our pipes according to international system ISO to determine pipe service life (minimum 50 years).
Unfortunately, the Russian market for metal-plastic pipes is now filled with very low-quality Chinese and Korean products manufactured under the names of well-known European companies.
We constantly monitor the quality of these “products” both in our laboratory and in the accredited laboratory of our Institute MIPP-NPO “Plastic”, which is part of our group of companies.
We are also ready to offer you fittings made in Canada, both compression and press fittings.
When buying a Liral pipe, you buy quality product reasonably priced. We are the only one Russian manufacturer, which produces metal-plastic pipes of European quality.

Material Specifications

Polyethylene - cross-linked, melting point - 220C, degree of cross-linking - 75%, thermoplastic, working temperature conditions 50-95C, high resistance to chemical reagents, corrosion resistance, non-toxic, non-flammable (decomposition temperature -400C).
Aluminum tape 0.2-0.3 mm thick (depending on the diameter of the pipe), tensile strength across the tape 17-2100 N. FIVE-LAYER pipe: polyethylene-glue-aluminum-glue-polyethylene.

Technical characteristics of the Liral pipe

Pipe outer diameter 16 mm 20 mm 25 mm 26 mm
Wall thickness 2.0 mm 2.25 mm 2.5 mm 3.0 mm
Aluminum layer thickness 0.2 mm 0.25 mm 0.3 mm 0.3 mm
Weight 1 l.m. 105 g 150 g 204 g 250 g
Minimum bending radius From 80 to 40 mm From 80 to 40 mm From 80 to 40 mm From 80 to 40 mm
Thermal conductivity coefficient 0.45 W/K 0.45 W/K 0.45 W/K 0.45 W/K
Linear expansion coefficient 0.000025 1/K 0.000025 1/K 0.000025 1/K 0.000025 1/K
Application temperature range From -40 to +95 C From -40 to +95 C From -40 to +95 C From -40 to +95 C
Permissible short-term temperatures of use Up to 110 C Up to 110 C Up to 110 C Up to 110 C
Oxygen diffusion 0 mg/l 0 mg/l 0 mg/l 0 mg/l
Roughness inner surface 0.003-0.005 mm 0.003-0.005 mm 0.003-0.005 mm 0.003-0.005 mm

Fitting

SUPER PIPE INTERCOMPANY (Canada)

FITTINGS FOR EVERY NEED

In 1998, SPI introduced a press fitting system that is more efficient, economical and easy to use.
SPI press fittings provide strength, tightness and reliability of the connection. A wide range of connectors and accessories allows you to quickly and easily install pipe systems inside and outside the house. Used for plumbing, heating, pneumatic systems, etc. Press fittings can be connected to any existing system.

Completely sealed

After the press fitting is inserted into the pipe, the crimp sleeve is pressed onto the pipe with a special pressing tool. This guarantees the strength and tightness of the connection when used in hot and cold water supply and heating systems. The crimp sleeve is made of annealed copper, which increases the reliability of the connection and improves appearance pipes, whether it is mounted inside a wall or on open place. Additional benefits:
- a copper bushing has an advantage over steel ones, since it does not have “memory”, thus no reverse pressing occurs;
- the plasticity of a copper bushing allows pressing to be done over the entire plane, and not just in a ring manner, as with steel bushings. For this reason, the crimping area increases tenfold.

THREADED CONNECTIONS

Over twenty years of operation, the threaded fitting system has successfully proven itself.
Threaded connections ensure complete sealing of the system of pipes and fittings when installing any industrial or private pipeline systems, both closed and open. These are systems such as plumbing, heating, compressed air and much more.
Threaded connections allow optimal combination and efficient operation with other systems and meet all requirements related to the installation of pipe systems for their successful operation.

VALVEX CONNECTING FITTINGS FOR MULTILAYER PIPES AND VESTOL TYPE CONNECTIONS

This system allows the installation of installations in industry, e.g. compressed air, liquids. The pipe clamp, located on the mandrel of the connection body, is made using a flare nut, which clamps and at the same time seals the ring. After fitting the nut and inserting the connector onto the pipe, the nut is tightened with a wrench to the mating part and, with its internal cone, rolls the connector insert onto the pipe, while outside diameter the insert is pressed into the calibrated hole of the mating part. This ensures a strong connection suitable technical parameters systems.
When dismantling the system, the connector insert remains rolled on the pipe and can be used with other VALVEX fittings without losing the strength of the connection. This type connections designed specifically for metal-plastic pipes. It combines the advantages of press fittings, ease of installation and the absence of special tools.