Polypropylene pipes due to operational parameters, aesthetic external view And the convenience of the assembly is often used in the installation of engineering communications. Thanks to the reinforcement technology increases the reliability and durability of pipes while maintaining all the technological characteristics of polypropylene, the pipes on their qualities are not only comparable to metal, but also exceed them.
However, for long-term and reliable operation of the pipeline system, proper processing is required, stripping ends when connected.
The reinforced pipe is a product with three layers: two polypropylene and one reinforcing. A constructive reinforcing shell provides storage of strength in the event of sudden temperature changes.
Such an indicator is as a coefficient of temperature elongation by 6% higher in pipes with aluminum reinforcement, which increases the durability and reliability of the pipeline in which reinforced pipes are used.
The presence of an aluminum layer in the polymer tube allows you to maintain high temperatures and prevents breaking the communications in the system. Tempera tour jumps are compensated by the flexibility of the reinforcing base. Reinforcement is performed in two ways:
Reinforced products are produced both with a solid web aluminum foil and in the form of grid with perforations. A viscous polymer flows through aluminum holes, and creates a solid adhesion with a protective layer, increasing the reliability of pipe products even with increased high-temperature loads.
If the reinforcement of fiberglass does not require additional stripping of the ends of the pipes, then when installing aluminum, it is required to remove and clean it.
When installing, the melted aluminum does not give a hermetic connection with propylene, and it is necessary to eliminate the contact of the metal with water in places of pipes and fittings, and avoid corrosive processes.
Attention! In the process of stripping, the oxidized layer and all sorts of pollution from the surface is removed from the surface. polypropylene pipes. Thus, the edge of the pipeline is prepared for the performance of a reliable welding joint.
Starting mounting reinforced pipes, It is necessary to pre-pick up a stripping tool. It can be both manual and mechanical devices.
Quite often with people occur ridiculous situations. For example, the stole repair of the pipeline in the house, the owner causes installers. Of course, specialists take a certain amount of money for their work. The final price is formed from the amount of materials spent, as well as the actions that they performed. Starting to understand, the customer does not always understand that for actions and for which they were committed by experts, as a result of the clock dispute.
Undoubtedly, in this situation, the customer looks ridiculous, as, without silent, challenges the final cost. In order to avoid such a situation, especially regarding the replacement of old pipes to new, polypropylene, it should be independently understood that the carrier for polypropylene pipes represents and why it is necessary.
Undoubtedly, today are the most sought-after, as it is endowed with a number of advantages. However, in addition to a large number of advantages, polypropylene has a number of features that should be considered when choosing this material. You should not forget two very important factors when choosing data of pipes:
Reinforcement allows you to some extent to solve both problems. By itself, reinforcement copes well with thermal expansion, in addition, it also does not give plastic soften and deform when high temperatures Heating. but correct installation The pipeline from requires some knowledge, including how to use the carrier.
To date, there are two versions of the polypropylene tube:
Not many know, especially when taking care of an independent shift and installing the pipeline, that before installation, it is necessary to carry out the reinforcement. But it is very important!
What is it needed for?
It is a simple process consisting of several stages. Each stage involves the use of a special tool, without which the stripping cannot be produced. One such tool is a carrier for polypropylene pipes. It is worth noting that under fiberglass reinforcement, the stripping is not required, since the grid is reliably hidden between the polypropylene layers, which rescues it from contact with water.
In the case of external or internal aluminum reinforcement, the stripping is required at mandatory. So, in the first version of the foil covers the top surface of the pipe. The installation of the pipeline involves the connection of its individual elements by fitting or gluing. In this case, it takes a slight melting of both surfaces of the pipe. Of course, the polypropylene alloy in some way is welded with aluminum, which will negatively affect the reliability of the structure, and it will eventually crumble. Avoid this easy, doing foil stripping.
The second option when the foil is conveniently located inside the pipe, implies the carriage of polypropylene pipes, since aluminum will be in direct contact with water. If you lower the coaling procedure, the slightest potential difference will result in the destruction of the structure as a result of electrochemical processes.
Most simple to remove foil with external reinforcement. Simple tools will help in this case - couplings with steel blades inside. It is easy to use them, it is only necessary to insert the coupling pipe into the cavity and turn the blades, the blades will make their work quickly and clearly. It is very convenient to use double-sided couplings with which it is easy to produce with different diameter from each other.
The internal stripper is carried out by means of a carrier. Externally, the design of the carrier is practically no different from the couplor design. So, this tool is a flour, the blades in which are located on the side of the inner end of the device. As in the first version, you need to insert a pipe into the cavity of the device and make several turns.
Universal tool with which you can remove reinforcement, both internal and external, is a drill with special nozzles. Externally, they differ from the same carrier by the presence of a steel rod, which is necessary for installation in a drill nest.
Above mentioned a few words about the carrier and about what the pipes need to be traced. It is worth carefully to stay on this instrument and understand its device. Quite often you can hear another name of the carrier - a slid tool for stripping the middle layer. This name is fully justified by the specialization of the tool, with which it is easy to clean internal reinforcement Pipes.
The device for the polypropylene pipes allows in two accounts to clean the pipe from the foil to the depth required to connect it with the fitting. Inside the tool there are steel knives that, when turning to the tool, gently cut foil to the required level.
It is worth noting that modern carriers are equipped with a system of adjustable knives. Due to this, the possibility of one-time acquisition of the tool appeared, which is suitable for working with pipes of different manufacturers. Using the regulator, you can quickly customize knives to any level of foil. In addition, there are carriers on sale, on both sides of which there are cavities intended for pipes of various diameters. This approach also avoids the waste of funds for the purchase of an additional tool.
When carrying out permanent enrollment work, it is recommended to purchase a drill nozzle in the form of a carrier. In this case, a person will not need to clean the pipe with a manual way. Drill allows you to process a large number of pipes in a short period of time without the use of physical strength.
It is worth saying that automatic cleaning is suitable solely for large and regular amounts of work. One-time carrying should be made manually. It is important to remember that polypropylene - soft Material, and the slightest deviation will damage the pipe. Manual torching is unable to harm the product.
Today, you can find a large number of instruments varieties, not an exception to the carrier. The cost of this tool varies from 300 rubles and up to 1000. Of course, you can find the goods and at a higher price. Choosing a tool, you need to carefully inspect its condition. There should be no damage and burrs. Any flaw can damage the pipe when it is placed in the carrier, or the pipe may not fit into it at all. No less carefully belong to the state of the blades. It is important that they are made of steel, the softer material may be damaged by contact with aluminum or do not cut it out.
You can find and replacement blades for the tool. Of course, with time and with frequent use, they may come into disrepair. Replace the blades much easier than buying a new tool. The greatest popularity today are the carriers intended for pipes of the following dimensions:
The cost of goods directly depends on its size. Thus, the carrier for small pipes will cost much cheaper than an analogue designed for pipes with dimensions of 50/63 mm.
The use of pipes in the composite metal structures is very profitable: the pipes give the compounds increased strength and rigidity, at the same time reducing the mass of the node. However, the pairing of pipes with each other is laborious, and requires special training of ends. This work can be facilitated using special fixtures - tubes for pipes.
The task of the tube transporter is minimizing the gaps that are inevitably obtained when the ends are fitted manually, as well as to give a welded compound sufficient aesthetics.
It is known that when connecting and inserting steel pipesDepending on the corner of their mutual inclination and diameter, the mutual conjugation curve can be parabola, arc or even straight. Therefore, the analytical calculation to perform a successful conjugation is very difficult. The problem can be solved by spatial 3D-modeling using well-known compass programs or AutoCAD, but in practice they come differently.
In mass production, tubing pipes are produced using milling machine, equipped with a dividing head. The method is accurate, however, it requires the availability of appropriate equipment that is not always available homemade Masters. At the same time, having a powerful metal drill (from 1000 W) and a crown cutter, you can quickly complicate the end of any pipe.
Industrial options for such devices in special literature are referred to in Tube Notcher (groove cutters, although curvilinear contours are capable of performing.
The pipe carrier includes:
With the help of the transporters under consideration, it is possible to compile pipes with a diameter of 6 ... 75 mm, which in most cases is quite enough. The range of changes in the conjugation angles is from 45 to 210 0. It should be noted that the crown cutter is not included in the device kit.
For the processing of long pipes, manual tubes with a chain clamp are used, and for short products, the reference and guide parts of the device are combined in one node. Safety of work is ensured by the presence of locking rings that limit the longitudinal movement of the shaft.
The shaft is the most structurally complex element of the carrier. First, it should receive a longitudinal movement as the cutter is introduced into the metal pipe. Secondly, vibrations are created during milling, which are caused by a sharp fluctuation of the torque of the base power tool. Therefore, the shaft is made polished, has a sliding landing of high qualitate accuracy, and the used bearing - needle-type, which allow axial and radial loads compensation.
The price of such devices from 8,000 to 50,000 rubles. At the same time, all transcers for the pipes of the dimension line TT are quite compact devices that are fixed in the cartridge turning machine. Similarly, the electric drill is fixed. When processing pipes of a small diameter, the device can be leaving right in the floor of the workshop.
With the mass production of shaped profiled pipes (for example, in sports car and motor, or on plumbing repair areas), the hand-made pipes can be made independently. For this, the source scheme of the carrier, which is shown in the figure, is done under the available homemaster of the workpiece.
The design consists of the following details:
For the manufacture of the shaft, you can use the front rack of the passenger car shock absorber (for example, the VAZ - it is easier to get them in the car service). In addition, the brand has become a shock absorber rack according to its strength and performance characteristics It fully complies with the requirements of the rigidity for high-quality steel (and, moreover, aluminum) pipes. For the direction of the shaft, the guides of the rack itself are suitable: they have a surface wear-resistant coating based on antifriction alloys. The ends of the rack are naturally subject to additional processing - under the fastening in the cartridge drill, and under the installation of the crown cutter.
Needle bearings should be selected into the guides, the size of which is selected by the gaps of the guides. Two bearing mounted in the cylinder guide of the recovered hydropress stroke will provide the desired rigidity and parallelism of the main operating unit of the carrier. Bearings are installed simultaneously with both ends of the housing.
The existing advice regarding the installation of fluoroplastic guides should be skeptical because the bearing capacity of fluoroplast is significantly lower than bearings.
For the manufacture of other elements of the homemade trailer for pipes, it is possible to use profile rental - corners or chapels of the appropriate size. Profiling and manufacturing the grooves is best done on the coordinate milling machine, thereby ensuring their accuracy and parallelism. It will not be difficult to make a clamping device, for which a new clamp is suitable with a necessary diameter and length.
The swivel lever must have sufficient hardness, so it is necessary to use a thickness strip with a thickness of at least 12 ... 16 mm. On that part of the case where the rotary lever is installed, it is worth applying angular risks for which it is easier to position the pipe.
The need for the processing of end elements of such pipes is due to the following:
A carrier for polypropylene pipes that have reinforcement includes:
Sheer is necessary for external tube transportation. It consists of two parts - a guide that is made of durable duralumin of the brand D16T and the hardwly, cutting part. When introducing into the pipe, the latter rests on the guide, after which the drill is turned on (the perforator can also be used) and cut parts of the reinforcing pipe layer. Since the shaver has a definite length, then the transportation for different pipes Always produced on the same length that facilitates their subsequent connection.
The price of the carrier-nozzle for polypropylene pipes depends on the diameter, and is 400 ... 2000 rubles. Manual type coals Cheaper: from 250 to 800 rubles.
Market building materials Offer big choice Polymeric materials.
The successes of organic synthesis made it possible to create materials showing excellent performance.
Polypropylene products are popular - each second apartment or a private house They have water pipe or heating from such pipes.
Modern technologies made it possible to create a durable, lightweight material that is not subject to corrosion, has good strength characteristics, does not react with aggressive media.
Small price, low weight, ease of installation cause the widespread use of polypropylene pipes (what is).
Industry produces several types of products, one of which contain the reinforcing layer outside or inside the pipe.
High-quality spike Such models are possible only in case of stripping ends from aluminum foil.
Two types of shavers are used in the work:
The first, apply when performing one-time operations, the second, is able to clean the pipe in large volumes, which is characteristic, for large construction companies ().
Water pipe or heating system Of the polypropylene, in addition to merit, there are several significant drawbacks.
Despite the ability to transfer water with a temperature of 90-95 degrees and to withstand short-term heating to 100 degrees, the polymer has a large thermal expansion coefficient (about metal installation technology plastic pipes Read in the article).
Flexible structure Let the product restore the form when the temperature decreases.
But this situation can become critical with a hidden gasket of the pipeline in the walls or under the floor.
Adding a fiberglass or aluminum foil layer to the composition will reduce thermal expansion and avoid deformation when heated.
Reinforcement helps on linear areas of the pipelineBut there is no foil connections. This leads to the softening of the polymer at temperatures above 100 degrees.
In such places there is a breakthrough of communications, therefore the use of reinforced products is not recommended for industrial pipelines.
To enhance pipes use:
In the process of stripping the reinforced product is removed metal layer At the place of the future connection with a coupling or fitting.
The need for external stripping It occurs when using reinforced pipes with the outer layer of foil. Without removal of reinforcement, unwind pipes is impossible.
To remove metal from the surface, a special tool is used (which is needed for mounting pipes from stitched polyethylene, written), which determine the product to the depth needed for welding.
Shooting for a drill Move for one diameter of pipes.
To work with such a tool, you need to prepare the necessary nozzles in advance.
The use of a drill will increase the speed of stripping, the number of processed pipes and labor productivity.
The nozzle is capable of working, both with external reinforcement and internal.
How to choose
The product is chosen, in accordance with the type of pipes, and is clamped into the cartridge. IN high speed Rotation lies lack - it is necessary, constantly, to control the process. Otherwise, you can damage the pipe.
Want to learn how to impeccably clean the front end of the pipe before welding, look at the video.
