In the arrangement of water supply and sewage systems, plastic pipes, which are distinguished by their durability and good thermal and physical properties, are becoming more and more common, which makes it possible to use them in any system with hot water supply. One of the factors that ensured the popularity of plastic pipes, the ease of their installation through an uncomplicated device; Therefore, it is important to know how to choose a welding machine for polypropylene pipes, if you plan to install them yourself.
The device of the welding machine for polypropylene pipes.
Features of welding of polypropylene pipes
Installation can be done in several ways: by means of butt, socket and socket welding. The first connection is the most common, because does not require the use of additional parts and is the most economical, unlike the two following, when couplings and fittings are necessary. Polypropylene pipes are connected through a special apparatus, on the principle of action resembling a soldering iron or iron. The surfaces are heated, and the finished ends of the parts are joined under pressure; the result is a seam that is not inferior in strength to the pipe itself. The welding equipment offered for today by manufacturers is classified into two types:
Table welding time of polypropylene pipes.
- Mechanical welding device for polypropylene pipes: is produced in the form of a metal frame, combined with a hydraulic unit and a block of control devices. It is used for welding large diameter pipes, when serious effort is required to align the joints.
- Manual welding machine: small in size, well suited for welding elements up to 125 mm in diameter, well suited for everyday use.
Since the mechanical device belongs to the professional equipment and is used when welding long lines, it makes sense to consider the criteria for selecting a manual device for connecting polypropylene pipes, which is successfully used when installing small diameter pipes used in the construction of water pipes, sewage systems, heating systems in residential buildings.Back to table of contents
Manual welding device
Connection scheme of polypropylene pipes.
The design of the device includes a heating element (TEH), mounted in a metal plate, a thermostat and a handle. The plate has a pair of holes (sometimes more), in which welded parts with different diameters are installed. When buying a device, pay attention to the inner coating - it must be Teflon, otherwise the elements to be welded will simply stick to the metal.
One of the main technical parameters of the device is the temperature, depending on the power of the device. From the last value depends on the speed of work. Power can be:
- from 1.5 to 2 kW: for installation of pipes having a diameter of not more than 100 mm;
- 850-1,2 kW: for welding elements 18-75 mm in diameter.
In addition to technical parameters, it is important to complete the instrument, which is supposed to weld polypropylene pipes. Usually the machine itself is included in the basic package, plus keys for attaching nozzles. Such a kit will help to connect pipes of one or two sizes. In the average package additionally include several nozzles for the most common pipes: 20, 25, 32, 40 mm while the device itself and nozzles are packed in a metal case. The complete set belongs to the category of professional; here, in addition to a large number of nozzles, extras are included (for example, for processing edges), which greatly facilitate the soldering process. The last configuration option is most beneficial if you have to use the device more than once.
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Manufacturers and cost
The main requirement for devices of this kind is the accuracy of installation and maintaining the temperature at a given level - 260 degrees (the melting point of polypropylene), which depends on the quality of the apparatus, i.e. from its manufacturer. The difference in cost between professional devices and intended for use in everyday life can be up to 4 times the value. For example, a home appliance can be purchased for $ 50, while the price of a professional often exceeds $ 200.
Such companies as Candan (line of devices with power from 1.5 kW to 2.4 kW), Eral (from 750 to 2000 W), Dincer, German Sturm, and Dytron are considered to be reliable, reliable manufacturers.
When buying, look not only at the brand of the manufacturer, but also at where the device was assembled.
- Chinese assembly has a low reliability, low cost;
- Czech soldering irons are characterized by high quality and the same price;
- Turkish devices occupy an intermediate position.
From the Russian devices for welding polypropylene pipes can be noted welding machine company "Energomash" (1700 W basic power, complete - nozzles 20-63 mm, gloves, tape measure, scissors, screwdriver). Approximate cost - 1320-1500 rubles, depending on the configuration and power.