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Mounting polypropylene pipes in Russia it is regulated by the provisions of GOST R 52134-2003 "Pressure pipes made of thermoplastics and connecting parts for them for water supply and heating systems", SNiP 41-01-2003 "Heating, ventilation and air conditioning", SNIP 3.05.01-85 "Internal sanitary technical systems”, SNiP 2.04.01-85 “ Internal plumbing and sewerage of buildings" and SP 40-101-96 "Code of rules for the design and installation of pipelines made of polypropylene "Random copolymer"". In the European Union, the requirements for the installation of polypropylene pipes establish a number technical regulations- standards, a detailed list of which is given in this material.
The main purpose of installing polypropylene pipes, regardless of the source material (PP-N polypropylene homopolymer, PP-B polypropylene block copolymer, PPRC polypropylene random copolymer) and its modifications (Polypropylen-Homopolymer PP-H-s fire-resistant, Polypropylen-Randomcopolymer PP-R-el electrically conductive, Polypropylen -Randomcopolymer PP-R-s-el electrically conductive and flame retardant) (see details) as well as reinforcement aluminum foil or fiberglass is to provide operating conditions under which the pressure and temperature of the transported liquid, and the temperature environment will not cause internal stresses in the pipeline and its individual nodes that can lead to a violation of the integrity or residual deformations in pipes, fittings and connections. The primary task of installing polypropylene pipes is to compensate for linear temperature changes in the pipeline by changing the direction of the route and without the use of special compensators.
Unlike pipes made of galvanized or stainless steel (see), all pipes made of thermoplastic polymers (see this material) have a high coefficient of linear thermal expansion, which is especially significant in hot water and heating systems.
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To solve this problem, the pipeline route is conditionally divided by fixed supports into sections that autonomously respond to changes in temperature (or pressure) in the pipeline. Fixed supports (BUT) direct the extension along the axis to sliding supports (SO) installed in places where the direction of the route changes, which, in fact, are compensating devices.
The relative temperature elongation of the pipeline section, limited by fixed supports for polypropylene pipes, is calculated by the formula ∆l = 0.15*l*∆t, where:
- Δl- change in the linear size of the pipeline section along the axis of the route, mm;
- l- length of the pipeline section, limited by fixed supports, m;
- Δt- temperature difference of the pipeline during operation and during the installation of polypropylene pipes, ° С;
- 0.15 - coefficient of linear thermal expansion of pipes made of polypropylene, mm/m °C.
Important: Polypropylene pipes reinforced with aluminum foil have a linear temperature expansion that is 2/3 less than pipes made of polypropylene without reinforcement. Polypropylene pipes reinforced with glass fiber have a linear temperature expansion that is 3/5 less than pipes made of polypropylene without reinforcement.
Linear thermal expansion pipes PN 10,16,20 from polypropylene random copolymer and polypropylene reinforced with aluminum foil pipes PP-R for hot water supply and heating systems, depending on the temperature of the transported medium, can be determined from nomograms (see below).
Rice. Nomogram of linear thermal expansion of pipes PN 10,16,20 from polypropylene random copolymer depending on the temperature of the transported medium 
Rice. Nomogram of linear thermal expansion of PN 20 pipes made of polypropylene random copolymer, reinforced with aluminum foil, depending on the temperature of the transported medium
Sliding supports during the installation of polypropylene pipes, as a rule, are made of clips, single or double, corresponding to the diameter DN of the nominal diameter of the polypropylene pipe.
Rice. Single and double clips for sliding bearings of polypropylene pipelines
SP 40-101-96 categorically prohibits rigid fixation of the pipeline during the installation of polypropylene pipes by compressing the pipeline. Therefore, fixed supports can be made on the basis of sliding supports with axial movement limited by two couplings or a coupling and a tee.
Rice. Fixed support for the installation of polypropylene pipes according to the recommendations of SP 40-101-96
Most often, when installing polypropylene pipes, compensating changes in the direction of the route are used:
The possibilities of loop compensating elements depending on the nominal diameter of polypropylene pipes are presented in the table below.
| d, mm | 16 | 20 | 25 | 32 | 40 |
| Δl, mm | 85-90 | 80 | 65-70 | 55 | 45 |
Important: Loop compensating elements have disadvantages - when installed on horizontal and vertical pipeline routes, it is extremely difficult to remove water from them, and when installed in horizontal routes - air.
When installing polypropylene pipes, sliding supports are installed on the sides of bends, tees and bends, and all types of compensating devices can be used in the piping system for cold / hot water supply and heating.
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SP 40-101-96 imposes stringent requirements on:
| Nominal outside diameter, mm | Temperature of the transported medium, degrees Celsius | ||
| 20 | 30 | 40 | |
| 16 | 500 | 450 | 400 |
| 20 | 550 | 500 | 450 |
| 25 | 650 | 550 | 500 |
| 32 | 750 | 650 | 600 |
| 40 | 850 | 800 | 700 |
| 50 | 1000 | 900 | 800 |
| 63 | 1150 | 1050 | 900 |
| 75 | 1300 | 1200 | 1000 |
| 90 | 1500 | 1350 | 1200 |
| 110 | 1700 | 1500 | 1300 |
| 125 | 1800 | 1700 | 1450 |
Connections made during the installation of polypropylene pipes
The main types of connections in the route during the installation of polypropylene pipes include.
The pipeline is fixed to various surfaces(floor, wall, ceiling) by means of special fasteners. They are clamps that wrap around the pipe in diameter. hallmark This device is considered to be securely attached to the wall. In addition to it, bolts with nuts are needed.
Mounting types
Fasteners have several varieties:
- crimp;
- safety;
- guides;
- support.
They are needed to fully attach the fixture to the pipeline in different places.
The clamp is made of steel or plastic. There are mounts with a rubber seal. The device can be dismantled if it is provided for by its design. Such a clamp is called detachable.
Important Points
- The deviation of pipes in a vertical position should not exceed 2 mm (per 1 m of length).
- The clamp must not be placed in the area where the pipelines are connected to each other.
- When sealing fasteners, it is strictly forbidden to use corks made of wood and welding.
- Pipe risers in industrial buildings fastened every 3 m (according to SNiP). SNiP is a set of regulations on construction.
- Riser pipes in residential buildings are fixed if the height of one floor is over 3 m. This applies to steel pipelines.
- Plastic sewer pipes should be strengthened, while not forgetting the slope.
Before finally installing the clamps, it is necessary to calculate the connections with branch pipes, with the exception of soft types fixation. For socket joints, rubber rings are used. Compensation pipes are used only once.
The gap between the fasteners of polypropylene pipes is calculated during design. This step, coupled with a rigid fixation, provides a longer operation. In this situation, mounts, in the design of which there is a rubber gasket, will come in handy.
The distance between the fastenings of polypropylene pipes according to SNIP directly depends on:
- temperature regime distilled substance;
- content in the pipe wall of aluminum or fiberglass;
- coefficient of linear expansion in a polypropylene pipeline;
- thickness, diameter and material of the pipe;
- additional loads.
Ignoring these factors will adversely affect the life and throughput of the pipeline. When too long distance between the fasteners, pinching of the supports and bending of the polypropylene pipes will occur, which will lead to the destruction of the entire system.
It is quite difficult to independently calculate the distance between clamps for PVC pipes. To facilitate this task, manufacturers of building materials attach to their products (polypropylene pipes) instructions for use, which contain an explanatory table (calculation depending on the diameter of the pipe and the temperature regime of the fluid being driven). An example in the photo.
If the firm is reliable, then the technical catalog is publicly available. In the absence of information about the distance between the fasteners, professionals advise making small gaps between the clamps.
This method has two disadvantages:
- Installation of polypropylene pipes will take longer than previously envisaged.
- You will have to purchase some additional clamps.
The design of a pipeline for sewerage is carried out taking into account the relevant regulatory documents (SNiP). Fixings will be required, without them sewer system will not function normally, as its alignment will be lost. AT this case not only a clamp is used, but also a plastic clip.
In the first case, the material from which the pipe is made does not matter (iron or PVC). In the second, in addition to the clip itself, you will need a dowel. If the sewer pipeline has composition of PVC, then its diameter will not be large. The reason for this is that plastic is not designed to carry too much load. The size of the clip varies between 16-50 mm. It is not used for fixing the pipe to the floor.
Steel or iron sewer pipes do not change under the influence of high temperature, which cannot be said about those made of PVC. A similar process is compensated by a clamp. In this case, both rigid and floating methods are used.
Distance between fasteners sewer pipes PVC is determined by the sewer system plan. Fasteners are carried out using the minimum gap. The frequency is 40 cm with a diameter of 50 mm. Further indicators increase proportionally, for example, if the diameter is 100 mm, then the distance from one mount to another is 80 cm.
In the same way, the installation of the pipeline on the ceiling is carried out, usually it is carried out in the basement. Fasteners in the form of clamps are not allowed to be used on bends; there should be a distance of 1.5 dm. It is imperative to fix the connection between the fitting and the pipe.
Steel pipeline fastening
Distance between fasteners steel pipes according to SNiP depend on the diameter. If a conditional pass reaches no more than 20 mm, then the gap between the clamps should not exceed 2.5 m. With a diameter of up to 32 mm - 3 m.
For a hole with a radius of 40 mm, you need a distance of 4 m. When laying a steel pipeline openly, the master will need clamps and brackets. The use of welding (gas or electric) is strictly prohibited. Steel pipelines laid in a trenchless way are not considered operational.
The quality of the work performed is influenced by the selected materials and the exact adherence to the developed pipeline plan. If necessary, you can consult with professionals. Their recommendations will help you choose fasteners suitable for pipes and produce them. competent installation. The experience of specialists should not be neglected.
The appearance of polypropylene pipes on Russian market turned out to be very timely when in most houses built during Soviet power, metal plumbing and heating pipes began to fall into disrepair, as they had completely served their time.
The period of some distrust of new plastic pipes did not last long. Consumers appreciated the quality, aesthetics and operational benefits polypropylene pipes.
Today, we can already state with confidence that the test of polypropylene pipes over time has been exceptionally successful, and they have become a more advantageous alternative to pipes made of other materials. What are the requirements for regulatory documents for these products, and how to do it right?
Overview of state standards for polypropylene pipes
Most products around the world are subject to various control systems governing their production and use.
Main normative documents in Russia are SP, SNiP, GOST: polypropylene pipes fall under the requirements of SP 40-101-96, SNiP 2.04.01-85, GOST R 52134-2003 and others.
Basic GOST requirements for polypropylene pipes
GOST R 52134-2003 "Pressure pipes made of thermoplastics ... General specifications» regulates:
- Scope: pipes from thermoplastics of round section and are used for transportation of drinking and technical water, are intended for arrangement of cold water and hot water systems, heating of residential and non-residential buildings.
- The main parameters and dimensions are given in the document in tabular form, this paragraph contains data on which, according to GOST 52134 2003, a polypropylene pipe should have outer and inner diameters, wall thickness, tolerances etc.
- Technical requirements: a large paragraph contains characteristics, requirements for reliability, raw materials, materials, components, recommendations for completeness, packaging.
- Requirements for safety and environmental protection: this section specifies the hazard classes in the production of pipes, contains reference requirements.
- Acceptance Rules: This refers to test methods, lot sizes, how pipes and fittings are to be sampled for testing, etc.
- Methods of control: the section regulates the procedure for testing products.
Large and important sections are also: transportation, storage conditions, pipe installation. In addition, various calculation tables are attached to GOST.
What is regulated by the joint venture, SNiPs
Rulebooks, building codes and the rules establish regulations for the design, installation and operation of systems, including those made of polypropylene pipes. Polypropylene pipes assembled in accordance with the requirements of SP and SNiP will work most efficiently and for a long time.
How to choose polypropylene pipes?
There are no prohibitions on independent in your home, therefore, in principle, a person who knows the installation skills and has an idea about the design of plumbing systems can purchase pipes and accessories for them himself and carry out the laying.
Piping installers themselves purchase necessary accessories and provide a comprehensive guarantee for the work performed (materials + installation).
In order not to be mistaken and purchase pipes with desired characteristics, necessary:
- carefully study the certificate for polypropylene pipes in the store, it must contain information about the class of operation of the product according to the State Standard, there are 6 classes of PP pipes:
- evaluate the quality of pipes and fittings: the outer and inner surfaces of the pipes must be smooth, the cross section must be ideal round shape; the presence of shells, cracks, burrs and bubbles in the material is not allowed; color models must have a uniform color;
- inquire about the guarantee for products, any pipe and accessories for it must be endowed with a supplier's guarantee.
It is important to consider that the permissible storage temperature of polypropylene pipes is not lower than -20 0 C. Therefore, you should not buy products in the winter on the street or in unheated stores.
Polypropylene pipes are easy to install, reliable, aesthetic. They have a long service life of 50 years. But it must be remembered that the long-term trouble-free use of pipeline systems installed in compliance with the standards is possible only under normal conditions.
Polypropylene is by far the most demanded material in the arrangement of pipelines for hot / cold water. One of essential conditions, ensuring reliable operation of the system - correct fastening polypropylene pipes. It can be performed in several ways, which are divided into two main groups: outdoor installation and internal.
Regardless of the chosen installation option, for its implementation you will need special fasteners and "consumables". This review provides up-to-date information that will be useful when choosing fasteners and consumables necessary for arranging polypropylene highways.
What are the standards for fastening polypropylene pipes
The laying of pipelines made of polypropylene must be carried out in accordance with the standards specified in GOST 52134-2003. This standard covers all necessary requirements by fastening pressure pipes from polypropylene. Compliance with this standard guarantees reliable operation of systems and the absence of leaks at normal operating parameters (temperature / pressure) in the system.
Pipes must be fastened in such a way as to compensate for their thermal expansion. To solve this problem, fixed sliding fastening elements are used that are able to respond to temperature changes (single \ double clips).
Code building regulations 40-101-96 indicates the inadmissibility of rigid fastening of polypropylene pipes. Therefore, it is necessary to use fixed sliding fastening elements that compensate for linear expansions.
How polypropylene pipes are fastened
For the installation of highways using polypropylene pipes, you will need:
- dowels.
plastic clips (or clamps) of the right size;
2.Tools:
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shaped screwdriver;
knife\scissors for cutting polypropylene pipes;
yardstick;
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pencil or marker.
Fasteners for polypropylene pipes must be carried out taking into account the risk of mechanical deformation and thermal expansion of the line. Experts recommend laying pipes in strobes, suspended ceiling structures, in walls, in screeds, along walls under skirting boards or in an open way.
Installation of propylene pipes must be carried out at an ambient temperature not lower than + 5 °C.
Pipes with an outer diameter ranging from 16 to 32 mm should be bent with a radius that is at least 8 outer diameters. Perform such operations at an air temperature of more than 15 ° C.
Propylene pipes must be protected from open flames.
If during the wiring process it becomes necessary to cross pipelines, then it is necessary to use special parts cross fasteners.
When connecting pipes with a thread, special fittings of the right size are used. Threading on a polypropylene pipe is prohibited.
If there are sections of polypropylene in the pipeline from metal pipes, then the connection must be made without the use of soldering or welding, as this can lead to overheating of the polypropylene fasteners.
Pipelines are laid with a slope of at least 0.5%. At the lowest point of the pipeline, it is necessary to provide for the installation of a drain cock or drain valve. Long pipelines should be divided into individual elements, which can be closed using ball valves or straight stop valves. This is necessary to facilitate maintenance and repair work. polypropylene pipeline. At the points where it is planned to install mixers and other plumbing equipment, a universal wall mount with axis adjustment from 10 to 15 cm.
Distance between fasteners
The maximum step for fastening polypropylene pipes PN 10 for horizontal lines:
Distance between fixings of polypropylene pipes PN 16 for horizontal laying, it should not exceed the values indicated in the table:
Mounting distance of polypropylene pipes PN 20(maximum spacing between supports) for horizontal mounting must not exceed the following values:
At vertical mount the values presented in the table must be multiplied by 1.3.
For polypropylene pipes STABI PN 20 with reinforcement:
Ways of fastening polypropylene pipes:
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At points where it is necessary to make a branch line
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At the attachment points of reinforcement
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With clamps
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Fastening next to the fitting
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When fastening polypropylene pipes, the operating conditions (temperature / pressure), permissible linear expansion, as well as connection options should be taken into account. There are two main mounting options:
fixed (there is no possibility of moving the fastener along the axis of the polypropylene pipe);
movable (compression / extension of the line is provided without changing the position of the axis).
When is it better to use clips for fastening polypropylene pipes
For the installation of pipelines made of polypropylene, nylon clips are used. These parts have the necessary resistance to high temperatures and strength. The size of the clip should be selected based on the diameter of the pipe (outer). Fastening of polypropylene pipes is carried out in accordance with installation requirements. The advantage of installing pipelines with clips:
- If the installation requirements (intervals for installing clips) are observed, the absence of bending of the line during operation is guaranteed.
Fast and reliable piping. Clips are fastened to a wall or other surface with self-tapping screws.
This mounting option can be used for laying highways from polypropylene pipes for various purposes that operate over a wide temperature range.
Fastening polypropylene pipes with clips provides an aesthetic appearance of the pipeline without additional closing structures.
Mounting can be carried out without special fixtures and tools.
Clips for pipes made of polypropylene are used for fastening water and heating mains. With their help, you can fasten the highway to surfaces made of wood, drywall, concrete or brick. Manufacturers' catalogs include single and double clips. With parallel fastening of pipelines, depending on the distance between the lines, two single or one double clips are used. Single fasteners are easily attached to each other without special tools. So you can install several parallel branches of polypropylene pipes.
Clip sets can be equipped with straps that prevent the pipe from falling out of the mount.
When installing a line from polypropylene pipes, it is necessary to observe the fastening interval. If clips are installed at an excessively large distance between the supports, sagging of the pipeline may occur. Optimum fixing intervals for pipes different size presented in the table:
Table 1
Before performing work on fixing polypropylene pipes, they must be connected to each other. For this, butt, polyfusion welding or connection with an electrofitting is used. In order to quickly and efficiently perform the installation of the pipeline, experts recommend following the following algorithm of actions:
Before execution installation work it is necessary to mark the future highway around the perimeter. It is necessary to provide a slight slope of the pipeline.
At the attachment points of the line, you need to drill holes for the dowels.
Install the clips into the holes.
Using a hammer and screwdriver, install the dowels.
Install clips.
When it is advisable to use clamps for fastening polypropylene pipes
For fixing polypropylene pipes, the price depends on the fasteners used and the weight of the pipe. For heavy pipes of large diameter, fixing clamps must be used. These elements have a rubber gasket that dampens vibration and screw ties for a secure fit. Clamps firmly fix even very heavy pipes with strong vibrations. AT comes with pin and dowel. There are plastic or metal clamps on the market. Experts recommend using for laying polypropylene pipes plastic fastener, which will provide the same strength characteristics of the structure. The pipeline is fixed in the form of a rigid or floating structure:
- Floating fastening involves loose tightening of the clamp. At the same time, a gap remains between the fastener and the polypropylene pipe. This provides the necessary mobility of the line with temperature linear expansions.
For rigid installation, the clamps must be tightened as much as possible on the pipes. Such fastening is used at points located below the socket. This installation excludes any displacement of the line.
In specialized stores, clamps for polypropylene pipes are available with or without a rubber gasket. Availability rubber seal provides sound insulation during the operation of the line and protects it from vibrations.
When performing floating fastening of polypropylene pipes to the wall, the distance between the clamps must be selected based on the diameter of the pipe. Regulatory values for pipelines for various purposes are shown in Table 2.
table 2
How is the fastening of polypropylene pipes for heating and plumbing in a hidden way
To solve design problems, there is often a need for hidden laying of communications. When using polypropylene pipes, customers have doubts about how reliable the pipeline will be and what technology it is necessary to carry out installation work.
Polypropylene products are resistant to corrosion processes and chemical active substances. Knowing these characteristics, we can say that pipes made of this material are quite suitable for concealed installation in the wall or concrete screed. Taking into account thermal expansion, when laying in a hidden way hot water pipelines around the polypropylene pipe, an air gap must be left. To ensure the operational reliability of the pipeline, it is necessary to minimize the number of pipeline connections. In addition, it is necessary to provide thermal insulation of the line. For this, special heaters, cardboard, mineral wool, etc. can be used. This will prevent the formation of condensate on the surface of polypropylene pipes. For maintenance of the system, it is necessary to provide easy access to the closing valve. To do this, hatches are mounted in the places of its installation, which, in a wide range presented in plumbing stores.
The first stage of work on laying pipelines involves marking the line, which can be applied with a marker or pencil. Further operations are performed in the following sequence:
According to the markings applied with a grinder or a puncher, parallel recesses are shredded. When working with a grinder, it is recommended to use discs for processing stone or diamond-coated discs.
The gap between the strobes is removed using a perforator or chisel so that a wide recess is obtained.
A pipeline is laid in the prepared recess, which is sealed from above with a cement-based mortar.
The place of installation is finished with decorative material.
After the pipe laying is completed, the line is tested in an hour. To do this, it is filled with water and examined for leaks. When performing flush mounting in the wall, the pipes are fastened using plastic fasteners. For pipelines of large diameter, metal fasteners can be used.
Polypropylene pipes and consumable for their fastening, it is better to purchase only from trusted suppliers. We offer you the help of specialists from the SantekhStandard company, which has been a supplier of engineering plumbing in Russia since 2004.
Working with SantekhStandard you get the following benefits:
quality products at reasonable prices;
constant availability of products in stock in any quantities;
conveniently located warehouse complexes in St. Petersburg, Moscow, Novosibirsk and Samara;
free delivery in St. Petersburg, Moscow, Novosibirsk, Samara, including to transport companies;
delivery of goods to the regions through any transport companies;
individual approach and flexible work with each client;
discounts and various promotions for regular customers;
certified and insured products;
registered in Russia trade marks, That is additional protection from low-quality fakes.
The specialists of our company "SantekhStandart" are ready to help you choose plumbing equipment both individuals and companies. All you need to do is call:
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