Ventilation pipe plastic hoods: calculation and features of installation

In the duct pipe for ventilation are the basic element. In their manufacture is used the insulation, and the profile can be very different. As optimal solutions are the vent pipes for the hood, which have a rectangular or round cross section.

Settlements

To ensure normal operation of ventilation, initially you must determine the purpose of each part of the system. Fittings, varieties cross-section of the pipe and the material for the duct or hood should be selected individually. Purchase and installation work is always carried out after the preparation of the project. The master must consider the characteristics of the installation, location and operation of the system. This should include temperature regimes, the square footage, performance elements, humidity and acoustic discomfort. Only in this way will be able to ensure normal functioning of the person. If the calculations must take into account that rectangular and round pipe of minor diameter capable to make a more impressive noise than the generalist.

Definition of the cross-sectional area

If you will use the plastic vent pipe to exhaust, as the most suitable cross-sectional area of the duct need to take the value that is calculated by the formula a = 25s. The flow rate should be equivalent to 3 meters per second. Under the letter "a" is the cross-sectional area, expressed in square centimeters, while s is the rate of air flow. These two values relate to the constant (25). This indicates that the most appropriate cross-sectional area are 75 square centimeters. If you use a course in school geometry and a formula (a =π x r²), then you can easily calculate the necessary dimensions. Selecting the ventilation pipe plastic for the hood, should be preferred those that have a diameter equal to 2.8 cm For this indicator is chosen and a certain length. When using rectangular pipes the calculation is performed by a similar method. If you have to install a vent pipe on the roof and do the calculations yourself there is no way, or desire, data manipulation it is recommended to trust the experts.

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Installation

It is Worth considering that polymers do not possess the qualities of fire resistance. In this case use the technology of combined installation and also install centrifugal fans that contribute to forced acceleration of the movement of air. Professionals who are engaged in installation works of ventilation systems, typically use a method of a combination of galvanized metal and plastic. It is possible to combine rectangular, round and other cross sections. Such solutions are used in the installation of extended systems that go from the technical premises and pass through places where in large numbers marked accumulation of people.

This could include restaurants, fitness centers and clubs. If they installed the vent pipe on the roof, you should use the experience of consumers. Thus, the most popular sections are those that belong to the range, which is equal to the limit from 55 to 110 millimeters. While the most frequently purchased pipes are those that have a length of 0.5 to 1.5 m.

Expert Advice on installation

If in the process of cleaning the duct system will be used in ventilation pipe, plastic, for drawing, you should bear in mind that the greatest efficiency will be achieved at the maximum straight line layout. In the presence of turns will increase the cost of hardware and the total amount of repairs will be very impressive. Choosing the form of tubes, it is necessary to consider that the rectangular cross-section capable of resisting in a greater degree to air flow compared to round. And the process of fixing docking involves more hassle.

Factors in favor of abandoning the plastic pipes before mounting

If you want to use a plastic pipe, the price of which is not as impressive compared to analog solutions, before you start repairing, you should be familiar with all the pluses of the described material. Among the disadvantages include low resistance, which is a major minus. This characteristic significantly limits the scope of use. In the end, the ventilation system may not be accepted by the fire service in the inspection report. This is why plastic pipe is rarely used on production facilities. The use of this material impractical for transporting steam or excessively hot air. Not to mention quite time consuming installation, astechnology implies master the necessary skills and knowledge. In addition, plastic pipes are mounted in tandem with the special fittings and hardware. However, the most beneficial is the pipe plastic. Pipes for the exhaust, the size of which you can calculate from the above formula, in accordance with budget decision and reduce the cost of construction, without damaging the aesthetics of the building both inside and out.

The Nuances of the installation

Plastic pipes for the hood in the kitchen are used quite often. They can be painted in any color, and make-it-yourself installation. With regard to the overall duct system, the output provides installation of steel pipe, whose diameter shall be 160 mm. This part needs to be supplemented with bends for pipelines. Before you connect the plastic pipe, you must consider some recommendations for the work. In accordance with the rules of fire and sanitary norms of the system can be equipped with blowing and suction blower, which is capable of forcibly stretching the air mass. The use of a pipe whose diameter is 225 millimeters or more is only useful when non-standard solutions. Here you can highlight the need to consider technical or architectural features of a building, object, or a particular room. When solving such problems can be identified engineering flaws and miscalculations, but experts capable of quickly and at a reasonable cost to solve these issues.

Selecting the design features of the pipe before installation system

If you will use the pipe sections are plastic, then you need to find the correct diameter, which must not be less in comparison with the hole of the extrusion output. Otherwise, the performance of the instrument will be reduced, the noise level can be higher, and will also increase the load on the engine. It is possible that the failure of the hood. If the vent construction has a diameter that is smaller than a characteristic inherent in the holes of the hood, it will be lost the whole point of the installation duct diameter more impressive. Installing the pipe for the exhaust, remember that it should not be too curved and long. In the presence of a right angle performance is reduced by 10%.

Conclusion

More impressive bending can be provoked by improper air flow and motor overload. Plastic tube, price may start from 40 rubles per meter, an optimal solution for a system of duct, not in all cases.