Today, when arranging a kitchen hood, corrugated pipes are often used. They are easy to install, and also have a lot of positive characteristics during operation. Today, a large selection of pipes for connecting kitchen equipment with a central duct is on sale. They differ in a number of characteristics. Existing varieties of corrugated tubes for drawing will be discussed later.
general characteristics
A corrugated pipe is a product that has metal rings in its structure. They are covered in several layers with a special material. Rings fold in the form of an accordion, clinging to each other. If necessary, the pipe can be stretched. Its length in this case will increase several times.
According to GOST, the corrugated pipe for ventilation and exhaust must have smooth inner walls. Its diameter must comply with established standards. The safety of the operation of the system depends on the correct selection and installation of the corrugated pipe. Proper ventilation allows you to maintain the right indoor climate. Through it, moist, dusty air masses, gases are removed from the room.
The durability and correct operation of ventilation, gas equipment depends on the correct choice of a corrugated pipe. Therefore, high demands are put forward on such products. Corrugated pipes are manufactured using special technology. GOST 50827-95 regulates the basic characteristics that ducts should have.
An advantage of a corrugated pipe is its ability to bend at different angles. Therefore, for its installation does not require many connections. The design does not have a rigid frame. Therefore, if desired, you can bend it in the most bizarre form. In this case, the product is plastic. It allows you to perform installation quickly even in hard-to-reach places.
Smoke and ventilation ducts are widely available in various variations. They can be made of different materials, differ in diameter and installation features. You need to choose these channels carefully. You should also know a few rules for their installation. Otherwise, the duct will not be able to carry out the functions assigned to it.
The benefits of corrugated pipe
Exhaust pipes for gas boilers and ventilation, made in the form of corrugations, have a lot of positive characteristics. Therefore, they are in demand today by customers.
Among the main advantages it should be noted:
- Quick, easy installation. The pipe bends at any angle.
- You can shorten the length of the channel with conventional scissors. This does not require a special tool.
- The length of the pipe itself can vary from 1 m to 3 m. Simply pull on one of its edges. In this case, a channel of the required length will be obtained. This allows you to compensate for errors in the calculation. The length of the channel is easily adjusted.
- Pipe diameters can be selected according to system capacity. On sale are several standard sizes of the cross section of the channel. For any element of the exhaust system, you can choose the appropriate option. If a duct of suitable diameter was not on sale, you can purchase a wider product. During installation, it is crimped around the nozzle. For this, a clamp is used, which makes the connection reliable.
- Light weight. The design is very light. This allows you to mount the channel with minimal effort and time.
- Additional adapters are not needed. To bring the system into proper form, it is enough to fix the ends of the pipe in the corresponding grooves.
- Pipe for hood, gas water heater is inexpensive.
- Long term of operation. The materials used in the manufacture of ducts are resistant to various adverse effects. They do not collect dirt and dust inside. Also, materials are not susceptible to corrosion, temperature changes.
Thanks to these qualities, corrugated channels displace other types of pipes for ventilation. However, they also have disadvantages. This should be remembered, wishing to purchase a similar product.
disadvantages
Corrugated exhaust pipe has several disadvantages. It should be noted that such products are quickly covered with soot, grease and dust from the outside. Moreover, it will be difficult to wash such contaminants. The outer surface of such products is ribbed. Various irregularities accumulate in these irregularities. Therefore, physical effort will be required to flush away grease and dust. At this moment, the hostess can easily damage the exhaust system, the integrity of its fixation points.
If the tightness of the pipe is violated (which is quite possible during the washing process), it will not fulfill the functions assigned to it.
It is also worth noting that the corrugated pipe for drawing is problematically assembled in its former position. Therefore, it must be stretched carefully. Otherwise, you will have to work hard to give the channel the required length. It is also worth considering that lightweight material is easy to damage, violate the integrity. Therefore, you need to handle it carefully. It is not difficult to cross the corrugated pipe. If a bend, a dent appears on it, this negatively affects its operational characteristics.
Compared to smooth pipes, the air inside the corrugated duct moves worse. The flow collides with wall irregularities. Because of this, its speed is gradually reduced. Therefore, such communications cannot be of great length. They are more suitable for household systems that do not require high performance.
Some varieties of corrugated tubes do not withstand the effects of high temperatures. Therefore, they can not be installed even on the hood in the kitchen, not to mention the gas equipment. Therefore, when choosing a product you need to be extremely careful. The channel material must meet the operational requirements of the system.
Of course, corrugated pipes are cheap. However, before buying, you need to find out for what purpose this or that type of channel is used. Otherwise, you have to buy another pipe. This is an extra cost.
Materials
Corrugated pipes made of different materials are on sale. The two most common varieties are plastic and aluminum. Galvanized pipes are made in the form of a direct, rigid channel. Corrugated varieties, in contrast to this material, are elastic.
Aluminum is considered a more reliable material. He is not afraid of high heat, temperature difference. It is also a non-combustible material that does not melt and does not release toxic components into the environment. Aluminum corrugation can be operated at temperatures from -30 º to +250 º.
In addition, it is a fairly durable material. It is not exposed to moisture, chemicals. At the same time, aluminum corrugation is characterized by high aerodynamic performance. Therefore, the air in it moves quieter. When installing hoods or gas equipment today, it is aluminum corrugated channels that are used. They are practical, durable and have a wide range of applications.
Plastic corrugated pipe for hoods has a neat appearance. It is made of special heat-resistant PVC. The service life of such pipes is up to 50 years. The product, like aluminum channels, has a low weight. In addition, plastic is absolutely not susceptible to corrosion. The material from which such pipes are made does not collapse under the influence of aggressive chemicals. The disadvantage of plastic channels is their increased noise.
It is worth noting that, depending on the application, plastic ducts must have the appropriate characteristics. So, a corrugated pipe made of plastic, which is mounted to move air, should be two-layer. Its outer edge will be ribbed. In this case, the internal space should be smooth. In this case, the maximum air velocity in the system should not exceed 30 m / s.
It is worth noting that experienced builders recommend choosing aluminum corrugated pipes. Such channels are practical, not afraid of high temperatures. They are stronger than plastic varieties, easier to install. Aluminum products are installed on hoods even at industrial facilities. Aerodynamics are higher than plastic channels.
Diameter and length
It is worth noting that the galvanized and plastic pipe is most often made not in the form of corrugations, but in the form of an even hard channel. It must not be bent. When it comes to corrugation, it is just the aluminum pipe that comes to mind. This material is considered the best for such a duct.
However, it is not enough to choose the right type of product. It is also necessary to choose the right diameter of the pipe. The correct operation of the entire system and its durability depend on this indicator. If the diameter is not selected correctly, the load on the channel increases. Sometimes she goes beyond the permissible limits. This reduces the efficiency of the hood, and also leads to an increase in noise level.
An incorrectly selected pipe diameter leads to a quick failure of the equipment. Therefore, his choice should be taken as responsibly as possible. The choice of the channel cross-section depends on the extraction power. A narrow pipe cannot be purchased for high-performance equipment, and vice versa.
To choose the right diameter of the channel, you just need to measure the outlet on the hood. This characteristic is also indicated in the equipment data sheet. You just need to remember that it is impossible to use adapters with which the channel is narrowed.
On sale is a household corrugated pipe 110, 125, 150, 200 mm. In some cases, a product with a cross section of 100, 120 mm may be used. If the duct is wider, it is designed for hoods in public places of use (for example, in a cafe, dining room, food workshop, etc.). Corrugated pipe 110 mm is suitable for drawing small capacity (in a small kitchen). If you want to mount an air duct for powerful equipment, the widest household corrugated pipe is used.
The right choice of duct length is also noteworthy. To purchase a product suitable in a particular case, you need to measure the distance from the exhaust outlet, pre-installed in the appropriate place in the kitchen, to the ventilation shaft with a tape measure. You also need to consider the route configuration. It should be noted that the minimum possible number of turns should be provided. The pipe should not bend too much. This will decrease system performance.
After the measurements, you need to add another 10% of the margin to the resulting length. Extra length can be cut. If necessary, the corrugation is stretched, creating a channel of the required length.
Cost
Corrugation for hoods can be purchased relatively inexpensively. It is an order of magnitude cheaper than a stainless steel pipe for hoods. Corrugated ducts are now sold almost universally. It can be ordered through an online store or purchased in specialized construction or hardware stores. The cost depends on the diameter.
Most often on sale are sleeves that, after stretching, reach a length of 3 m. This is the most popular channel size. The minimum cost of such a product is 200 rubles. This is a pipe with a diameter of 100 mm. It is suitable for a small kitchen, in which a hood with a low power is installed.
Corrugated pipe for drawing 120 mm is a bit more expensive. Such ducts are sold at a price of 230 rubles. If the design has improved components (for example, reinforced rings), the price may be even higher. Also, the price depends on the manufacturer and the pricing policy of the store.
A corrugated pipe for drawing 150 mm in diameter costs from 350 rubles. and higher.
It is also worth considering that for such ventilation ducts fittings and adapters are not required. You may need to purchase a clamp to secure the ends of the pipe in the seats. However, such structural elements are inexpensive. But for the installation of rigid systems made of stainless, galvanized steel and other similar materials, it is necessary to additionally purchase fittings, adapters. This further increases the final installation cost.
When buying, it is advisable to request from the seller the relevant technical documentation for the air ducts on sale. Poor quality products quickly become unusable. Therefore, it is better to give preference to products that have sufficient rigidity, and are also manufactured in accordance with the requirements of the standards.
What to consider before installation?
Wanting to mount an aluminum corrugation, you need to familiarize yourself with a few recommendations from experienced craftsmen. So to make a mistake will be almost impossible. Before buying a corrugated pipe, you need to consider its location in the room. The fewer bends ventilation will have, the better. Turns increase the load on the hood motor. According to the established rules, the number of bends should not be more than three.
It is also worth avoiding turns at an angle of 90º or even less. Turns need to be done smoothly, at an obtuse angle.
Professional installers of hoods and ventilation equipment note that it is strictly forbidden to reduce the diameter of the pipe. The channel must be selected the same size as the outlet of the equipment. Otherwise, the efficiency of the equipment will decrease.
When choosing the length of the duct is definitely worth making a margin. To remove the extra length is much easier than to build up the channel later. However, too long a pipe should not be installed in the system. It should be fully extended. Otherwise, the number of ribs increases. In these places, dirt accumulates more. The patency of the interior will decrease faster. Therefore, it is better to choose the pipe size after careful measurement.
It is also worth noting that the length of the channel should not exceed 3 m. If it is longer, air will not be vented from the room effectively. Its speed of movement along the pipe will decrease.
Sometimes novice masters make mistakes when calculating the length of the duct. Because of this, they have to decide how to connect two corrugated pipes for drawing. This can be done with aluminum tape. However, at the junction, the permeability of the pipe will be worse. Therefore, such a technique is resorted to only as a last resort. The cost of the pipe is small. Better to buy a new duct.
When choosing the necessary elements for connection, it is worth giving preference to the shield for the ventilation shaft, in which there is a hole for connecting the channel, as well as a grille for natural ventilation. If the hood is turned off, the air will still be gradually updated.
What is needed for installation?
Wanting to mount rigid corrugated pipes with your own hands, you need to prepare the necessary materials and tools. You will need to purchase a ventilation duct with the appropriate dimensions.
In addition, to connect the corrugated pipe to the hood and ventilation shaft, clamps are required. They will help to clearly fix the ends on the flanges. This prevents depressurization of the system.
For the vent, you will need to purchase a return trap. It must be integrated into the protective grill. This element will not let the cold air from the street into the house. You will also need to purchase aluminum tape, silicone sealant.
If the hole in the hood for connecting the pipe is not round, but rectangular or square, you need to purchase the appropriate adapters. However, they should not reduce channel capacity.
No special tools will be used during installation. Therefore, the whole procedure can be done even by a novice master, in whose arsenal there is not a large number of special tools.
Installation procedure
To complete the installation of a corrugated aluminum pipe for drawing, you need to adhere to a certain sequence of actions.
First, the duct is stretched to its full length. If it turned out to be more than necessary, cut off the excess with conventional scissors. The exhaust outlet is treated with sealant. A corrugated pipe is installed on it. She put on until it stops, to the very edge of the pipe. If the diameter of the duct is larger than the exhaust outlet, an adapter can be used. However, its narrow end should not be less than the cross section of the equipment nozzle.
Next, the sleeve must be fixed. This will require a clamp.They grasp the pipe and exhaust outlet pipe. Then the clamp is tightened. After that, you can install the same clamps along the entire length of the ventilation duct in increments of 1 m. These clamps will help attach the corrugation to the wall or ceiling.
When the channel is mounted along its entire length, its second end must be attached to the grate. Her pipe is also treated with sealant. The procedure is the same as for the hood. The grill is mounted on the intended opening of the ventilation shaft. It is fixed with sealant or with self-tapping screws.
Installation completion
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Many owners hide ventilation ducts. To do this, you can purchase a special decorative box. It will also perform the function of soundproofing. In some cases, the owners mount a similar box of drywall. This is a rather complicated procedure. You will need to create a frame from profiles on which you will need to mount drywall.
If the arrangement of furniture in the kitchen allows, the corrugation is hidden in the headset cabinet. If there is free space above the furniture, a canal is laid right here. In this case, the ventilation pipe will not be visible.
Having considered the features of corrugated pipes for hoods, you can choose the appropriate type of duct, as well as mount it yourself in accordance with existing rules and regulations.