Every year there is an increasing demand for work related to installation, restoration of communications, if necessary. Especially often, such work is carried out in premises that are used for cooking.
What is air duct
By themselves, air ducts simply do not exist. They become part of the whole system installed at a particular facility. These can be systems:
- Removing hot air from the boiler room.
- Pneumatic transport. Used in factories when supplying hot air.
- Aspiration is a type of dust-free ventilation.
- Smoke extraction.
- Air conditioning.
- Heating.
- Ventilation.
Each of the available systems has its own requirements for the cross-section of the ducts. For example, it can be round or square. Its own set of requirements is imposed on the materials that are used for manufacturing. These may include plastic, metal, stainless steel, and other options. Air duct installation should take these factors into account.
Causes of system malfunction
- If the repair or installation of air ducts was carried out by persons without proper qualifications.
- With natural wear and tear of the equipment.
Most often, there are situations described in the first paragraph. Installation and restoration of the ventilation duct is a whole complex of works, all the nuances of which are familiar only to real professionals. Therefore, it is better to immediately trust them after purchasing suitable types of equipment. And contact them when ventilation restoration is required.
Important rules
- The so-called "sleeves" of the pipes must be stretched sufficiently. Then sagging will be eliminated. That will prevent losses in air pressure and pressure.
- For bends, it is recommended to choose the largest possible radius. If the turns are too sharp, we will again lose pressure in terms of pressure.
- The earthing of the line must be organized. During the transport of air, static electricity can build up, as the air contains various organic components. This makes cleaning the air ducts more difficult.
- Protective metal adapters are installed where the channels pierce the walls. It is through these adapters that the air ducts are pulled in this situation. Otherwise, the possibility of damage to the sleeve increases due to the fact that it will come into contact with sharp corners belonging to stone surfaces. Then the restoration of the duct will not give the desired result.
- There should be no more than 40 cm between the elements responsible for the fasteners. Channel vibration will be too strong if the distance is greater. It also contributes to increased sagging. It is recommended to comply with this norm, even if after these actions the cost of installation will slightly increase.
About the features of fastening air ducts
When fixing the air ducts, all masters must adhere to SNiPs. Some of them must be observed regardless of what kind of materials were used for the production of air ducts. And regardless of whether the restoration of the air ducts in the kitchen was carried out.
It is necessary to create a separate label on the diagrams, on which only the fasteners themselves are applied. Otherwise, it will be impossible to evenly distribute the loads, taking into account the routing.
Modern construction is distinguished by the presence of a typical floor height of up to 4.5 meters. Fastenings are allowed only in the interfloor overlap, unless other types of parts are indicated in the design documentation. The interfloor floor has its own characteristics: it requires a tight girth of the duct along its entire length. Rectangular air ducts are clasped with traverses, and round ones - with clamps. In this case, the level of fire resistance of the fasteners should be no lower than that of the floors themselves. This must also be taken into account when restoring the air duct in the kitchen.
Testing and commissioning of the facility
According to SNiPs, there are only 4 stages in this process. But they also need to be observed.
- First, hidden works are subject to examination.
- Then they move on to conducting individual tests.
- Then - carrying out works of the commissioning type.
- Finally, at the last stage, the facility is put into operation.
There is also the fifth stage of this work, in which the fire safety systems at the facility are involved.
Conducting individual tests
In total, three representatives are selected for testing:
- From the installer.
- From the general contractor.
- From technical supervision.
Tests are carried out to check the performance of each electric motor. It is important to look for defects in parts and parts that rotate. This is especially important for bulky equipment supplied to difficult installation locations. If the equipment is defective, preliminary individual tests can be performed to avoid additional costs. Even if later the restoration of the duct is still required.
Much controversy has to do with how long tests should take. SNiPs stipulate that their duration should not exceed 72 hours. For air conditioning and heating equipment, tests are carried out in connection with the recommendations from the manufacturers themselves.
Installation rules for horizontal ducts
The sequence of work in this case will be as follows:
- Installation elements are installed by welding to the embedded parts. To do this, you can use a construction and assembly gun.
- After that, they move on to creating markings for installing mechanisms that have become indispensable when lifting nodes. At the same stage, towers, scaffolding and scaffolding are prepared.
- Individual parts of the air ducts are brought to the overall structure. On inventory stands, parts of the system are assembled into a single whole. Parts belonging to large air ducts are assembled on the floor.
- Proceed to the installation of fasteners, clamps.
Air ducts are laid in several most common ways. For example, in an inter-truss space, on an overpass or an outer wall. The restoration of the ventilation duct is carried out in the same areas.
Additional installation features
- According to the material used in the manufacture.
- By the presence of additional devices.
- By form.
All these factors are subject to mandatory consideration when organizing the production of air ducts. The ideal design option can be selected for almost every room, regardless of the characteristics.The consumer receives guarantees of safety and quality only if the manufacturer and installers comply with GOST, this is their primary task. This also applies to such works as the restoration of the ventilation duct.
One of the first places in this market segment is occupied by the so-called galvanized air ducts. An excellent combination of performance characteristics provides a wide range of applications.
- High wear resistance.
- Lack of complex solutions in the design.
- Corrosion protection.
It is galvanized air ducts that are distinguished by the most attractive price. What are galvanized air ducts? The thickness of the sheet, which became the basis for the creation of the equipment, is at least 0.5-1.25 millimeters. The strength of the material is quite high, but the weight remains low. This makes it easy to clean the ventilation systems.
If it is necessary to install ventilation in office premises, rectangular ducts are often preferred. They are also galvanized. They have a smaller cross-section than their closest circle-shaped counterparts. Which makes it easier to restore ventilation.
But the round air ducts themselves are more often used for installation inside industrial premises. Thanks to this shape, the aerodynamic characteristics are noticeably increased. Semi-rigid structures are required where there are hard-to-reach places. The main thing is to take into account not only the shape, but also the thickness of the material used. The calculation is based on the characteristics of the air passing through the system.
