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.
Getting Started with the installation of reinforced pipes, you must first select a stripping tool. It can be both manual and mechanical devices.
Cleaning and reinforcement of polypropylene pipes are not the most difficult tasks, but they have many nuances. This will be discussed in the article.
One of the advantages of polypropylene pipes is a long service life. They can be used at times longer products made of metal. But the service life largely depends on the quality of the mounting work. It is possible to maximize it in the event that a cleaning of reinforced polypropylene pipes was performed correctly.
It plays such a high role due to the fact that the presence of various irregularities and burrs will prevent a reliable connection. Even during the planning of the installation of the polypropylene pipeline, it is necessary to delve into what is required by this procedure. It is also worth dealing with which existing tools for stripping polypropylene pipes (read: ""). Separate attention should be paid to products with a reinforcing layer.
High operational properties Polypropylene pipes are achieved due to their coating with a protective layer. If we are talking about products intended for household use, It is usually its thickness no more than 0.1 mm.
Advantages of reinforced pipes:
However, reinforcement has one essential disadvantage. It complicates the welding of polypropylene connections to some extent. For this reason, it is predetermined for pipes. The procedure is extremely simple: removal of the upper thin layer of aluminum from the product. If this is not done, the quality of welding will decrease, which will lead to a decrease in the life of the entire pipeline.
It is important to perform work gently, understanding general principle. To better figure it out, read technological process, and also slow down required tools. Detailed information on these issues will be set forth later in the article.
There are several ways of stripping, each of them is intended for a specific reinforcing layer.
Outer layer. If the reinforcement is applied as the top layer of the polypropylene tube, it will be an interference when the design with the fitting is connected. Then the pipe part of the pipe melts during the installation. If you fail, the melted aluminum will not be able to rest on the molten polymer. In this case, nothing will ensure the tightness of the connection. It will break immediately after starting the system.
Inner layer. Despite the fact that aluminum is not used between polypropylene layers, it is not used when welding, it still needs high-quality stripping. It is necessary in order to prevent the interaction of aluminum and water. If the pipeline occurs in the pipeline of potentials, that is, the risk of electrochemical processes. They can completely destroy the aluminum layer.
Prompt! It is possible to impose a reinforcing layer of aluminum or with holes. If there is a choice, the second option is much more preferable. The perforated aluminum layer is characterized by a good clutch, also does not need glue for it. In addition, stripping pipes with perforated aluminum is produced much faster.
Reinforcement fiberglass. In this option, cleaning for polypropylene pipes do it yourself. A thin wall of fiberglass is located between the polypropylene layers. It does not contact with the fitting, also does not experience the effect of fluid. One of the advantages of this method is that reliable fastening of pipes is achieved without additional work. But hence the following drawbacks - on such products, sharp temperature differences have a greater impact than the options with aluminum reinforcement.
There are manual and mechanical enrollment tools for polypropylene pipes. Manual devices are excellent for performing work at home. If a more voluminous task is to be needed, then mechanical tools will be required.
Tools for stripping tools:
An important nuance! It is worth understanding the difference between the cleaning of pipes before welding with the cleaning of metal products. These are two different types Work. For each of them, various equipment applies. In addition, they have different technological processes, which should also be taken into account.
Also, for stripping polymer pipes, you will need: a roulette, the desired enrollment tool, a building pencil for applying marks, a soldering iron, and scissors, pipe cutters or hacksaw. These are in-demand tools, they can be found in almost every home.
To get the perfect cut of the pipe, you should use high-alloy steel tools. It is preferable to choose bilateral solutions. Such a tool is effective when working with products of different diameters.
Perform sweep for polypropylene pipes is not particularly difficult. One person can cope with the task, no special knowledge for this. Also not required expensive tools. Simple machines will completely cope. Even with their help, the sweep will be able to produce quite well and neatly. It is enough just to prepare everything in advance, carefully studying the technological process of this task.
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.
Processing of reinforced, polypropylene, plastic and profile pipes Before welding is a mandatory procedure. It allows you to achieve a high-quality and reliable compound that can not be completely physically and mechanical effects. The welded zone will not crack and disconnect when stretching.
Due to cleaning and removing the oxide layer from the pipe, it is possible to create the most suitable surface that will be familiar to electrometer food Welding in domestic and production conditions.
All enrollment elements are divided into two categories. - Manual and electric. TO hand tools Believe:
To electric:
Each tool has its own features of the application that are based on the criteria such as - Size and type of pipe, product manufacturing material, functionality of fixture, model and manufacturer.
Among the best brands are Reed, Virax, Ritmo, Adr Tech, Rothenberger, RidgiD and Rems. Stripping for plastic pipes of all these companies is implemented in online storeProftekhsnab.
Not in every store is going to have such an extensive collection of enrollment inventory for pipes. of different types. This directory presents tools that perform sweeping and processing of surface surfaces in front of them directly welding.
If this is a reinforced pipe and you need to remove the plastic and partially aluminum layer from it, then the chambers from Ritmo are perfect on the site.
If the preparation of the pipe with the elimination of the burrs and the oxide layer is required, then products from REED, REMS, ADR Tech, etc. will be suitable.
All products complies with high quality standards and has the necessary certification documents from the manufacturer.
The company offers only reliable tools for different diameters of pipes and types of welding. All of them possess the following qualities:
Stripping for plastic pipes - This is an important event that cannot be passed during welding. Otherwise, the compounds will not be reliable and can be deformed at the very first loads of the coolant (if it is a pipeline for water supply and heating of the house), mechanical effects (if it is planned to carry out fiber, electrical wires and communication cables) and chemical influences (when hazardous substances are allowed in the pipeline, Liquid and liquid type).
Metal in domestic communications gradually replace various materials from polymers. Especially attractive to the consumer properties of polypropylene, allowing you to use it for all household communications.
Polypropylene is resistant to corrosion and sediments, does not change properties under the influence of aggressive chemistry. Water transported through systems from this material does not lose its properties. It is important for a large bandwidth, due to a completely smooth inner surface.
Types of reinforcement
Non-reinforced polypropylene differs in low thermal conductivity and resistance to high temperatures. Over time, he changes the form. This property is called fluidity, which requires the installation of fasteners every 50 cm of the pipeline.
Especially bright fluidity is manifested at elevated internal medium. The main purpose of reinforcement is to reduce this particular quality. After the reinforcement, the polypropylene material becomes more rigid, it helps less when laying in a horizontal position, which makes the system more stable.
Aluminum tape reduces linear expansion coefficient to a level that comparable to this indicator of metal products. In addition, aluminum contributes to a decrease in the conductivity of oxygen. Yet better quality When reinforcing fiberglass. This material makes the installation easier than the aluminum tape, as it disappears the need for stripping before soldering. It is also important that products with fiberglass cheaper than products with aluminum ribbon.
In reinforcement, a solid or perforated aluminum foil can be used. It can be located near the outer shell or in the middle of the wall. The solid foil is connected to the polypropylene with a thermoclaus. The use in the production of poor-quality raw materials entails separation during operation.
This phenomenon is impossible if the reinforce is used perforated aluminum. The foil holes make it possible to create a monolithic compound of plastic with aluminum without using glue.
When choosing products from polypropylene, it should be borne in mind that some manufacturers in order to reduce costs use low-quality raw materials and make too thin walls from pipes. It entails separation and instability to internal pressure. According to external signs, it is quite difficult to distinguish a high-quality product from poor quality. It is necessary to purchase a material with the most thick walls (that is, the one that has a heavier running meter).
Recently, polypropylene tubes reinforced with fiberglass appeared on the market. Sometimes they are called fiberglass. If the product, aluminum reinforcedIn fact, consists of five layers, the use of fiberglass makes it possible to obtain a material with a monolithic structure, since the middle layer is the same polypropylene, but mixed with fiberglass. All three layers are not glued, and welded, which completely eliminates the bundle.
However, one disadvantage of fiberglass reinforced products is still - their linear extension by 6% more than when using aluminum. Why do you need stripping for polypropylene pipes before soldering. Some reinforced products before soldering must be cleaned to remove the outer layer of polypropylene and aluminum foil, which prevents the creation of a durable compound with the fitting.
The stripping of reinforced polypropylene pipes is always required when aluminum is used for reinforcement, and, regardless of where the foil is located. Difference only in the tool used. If aluminum is located in the middle of the wall, the carrier is used. Material reinforced with fiberglass, stripping does not require, as it consists of polypropylene.
Tool for stripping
The enrollment tool for polypropylene pipes makes it possible to work with products with a diameter of 16 to 110 mm. For diameters up to 63 mm, double-sided couplings are performed, which allows you to clean the ends with two different diameters if the aluminum layer is located at the outer surface. Knives of this tool are made of inoperative steel.
If the foil is located in the middle of the wall, a carrier for polypropylene tubes is needed, equipped with regulated knives, which makes it possible to adjust the tool for any diameter. Just like the coupling, the carrier has a bilateral design (under two different diameters).
Torching of polypropylene pipes is the cutting of foil from the end to the depth of welding. If this procedure is incorrect, aluminum will prevent reliable connection Between the elements of the system, that is, the welding seam will not be high enough. During operation of the system, water will interact with aluminum, which can lead to leak and formation of rust in heating devices.
Another way to solve the problem "How to clean the polypropylene tube" is the nozzle on the drill (Shaiver). This method is used with a large amount of work for stripping the outer layer of polypropylene and removing the reinforcing aluminum layer, if it is located at the outer surface. The case of the shawl is made of aluminum, knives from instrumental steel.
Thanks to the seventur, the stripping for polypropylene pipes is automated, alleviating and accelerating installation with a large amount of work.
