The conditions for the use of steel radiators.
The vehicle rusted and flowed a steel radiator. She asked what to replace him with.
“Professionals” immediately began to advise the radiators “Purmo”. I am entirely for the puro, but everything is limits. As they say, you can break with a fool.
There are a lot of everything, but there are only four main theses:
The heating system should be independent and closed.
Pipes should be with an oxygen barrier.
I would add another fifth point about the lack of electrical potential so that there is no electrical corrosion.
Judging by the pipes and the words of the vehicle, this is an old panel house. And in old houses, the heating system in the vast majority of cases is made dependent, then, connected to the heating system through the hydraulic elevator, or pumping mixing. Poorly prepared thermal grid enters the heating system, and the oxygen dissolved in it destroys everything that can rust, in this case. Steel radiator. In modern heating systems, heat exchangers are used to connect to the heating system, heat and water water and house water are not mixed, and there are no problems of oxygen corrosion. Thus, in a dependent heating system with poorly prepared water with oxygen, instead of a flowing steel radiator, which is afraid of oxygen, “professionals” recommend a steel radiator that is afraid of oxygen. Absurd.
Pipes without an oxygen barrier. This does not apply to that post anymore. This is for lovers of polypropylene reinforced with fiberglass. Plastic pipes pass through themselves oxygen through diffusion. Http: // www.Meto.Ru/analiz/publ_17.HTM The amount of oxygen is as if you changed water for a fresh time every three days. Consequently. Steel radiators (and boilers “barrel in a barrel”) rust and flow at the fourth year of operation. The water pressure in the system does not prevent oxygen diffusion. The oxygen barrier today is any metal and ethyleneine alcohol EVOH, EVAL.
HOW TO ADD A RADIATOR TO EXISTING HEATING SYSTEM Pt.1
Enlightenment of the heating system. A common situation when the installer mounted everything, filled, crimped, all fucked up. Then plasters come, remove radiators, do their job for a long time, later put radiators in place, and they are all in holes. This happened due to the fact that oxygen penetrated from the air into the radiator, and the moisture remaining in it, being a catalyst, accelerated corrosion. Conclusion from this item. Store radiators with water. Removed, filled with water from the tap, drowned out, and then nothing will happen to them.
Pressure. Everything is clear here. Exceeding the working pressure will lead to the destruction of the radiator.
There should not be electrical potential on the heating system, t.To. Corrosion developing by electrochemical principle will destroy radiators. She does not even need an flow of oxygen, she mines it, dissociating water molecules.
So, dear lovers and professionals, before applying something, read the instructions.
Types of radiators that are installed in apartments
Most often in stores and markets, heating radiators are presented from such materials:
- Cast iron.
- Steel (tubular and panel).
So, what to choose for the apartment, let’s try to figure out this issue together!
Cast iron radiators
They can be called one of the most “ancient” heating devices that have not yet lost their relevance.
Thanks to the features of cast iron, today these batteries are very popular in our country. Due to the thick walls, they are not afraid of hydraulic boards and are able to withstand pressure in 25-30 atmospheres. Cast iron radiators are able to function not only in the autonomous heating system, but also in central communication. This material is not subject to corrosion, which determines the popularity of batteries in our country, because, as you know, the heat carrier often does not differ in cleanliness. Another advantage of cast.Iron batteries is their ability to maintain heat for a long time, even after turning off the heating system.
The disadvantages of cast.Iron batteries include heavy weight, which significantly complicates the installation process. It is impossible to install these radiators alone.
In addition, cast iron has low thermal conductivity, due to which efficiency is achieved only at a stable temperature of 70 0. For a private house or autonomous heating, this can become an invoice, but for an apartment solution with the normal functioning of the central heating system, this is a good option.
In Soviet times, they produced cast.Iron sizes of standard size. To increase the heating of the apartment, it was necessary to increase the system, which did not always positively affect the aesthetic form. Today, in the modern market, many options for cast.Iron radiators from domestic and foreign manufacturers of various capacities are presented. Therefore, you can choose small batteries that perfectly fit into the overall concept of the interior. Previously, cast.Iron batteries were attached to the walls to the wall. Today you can choose beautiful radiators with a floor installation that have an elegant look.
Modern cast.Iron batteries do not need additional processing and coloring. They are already sold ready for installation, and there is no need to color them every year. They are minimal: due to the smooth surface, dust practically does not settle on them.
The variety of colors and styles of cast.Iron batteries helps today not only harmoniously fit into the classic or retro style, but also make radiators with a separate decorative element.
The advantages of cast.Iron radiators:
- Corrosion resistance.
- Stylish appearance.
- Unpretentiousness to the purity of the carrier.
- Affordable price.
- For a long time retain heat.
- Can function in the central and autonomous heating system.
We conclude: for apartments with central heating, the choice of cast iron radiators is optimal. They will last at least 15-20 years and will effectively give heat.
Features of installation of cast.Iron batteries
Given the large weight of cast.Iron batteries, installation. The process is quite laborious and difficult. If you decide to independently install cast.Iron radiators, you must take into account the following factors:
Steel batteries are the optimal ratio of price and quality. They are able to withstand a sufficiently large load and hydraulic boards of the heating system. And thanks to the high level of conductivity, steel batteries quickly heat up. For autonomous heating or heating of a private house, this option is quite practical.
Speaking of steel radiators, it should be mentioned that they are of two types: panel and tubular.
Panel steel batteries
Panel radiators are a design of two steel sheets interconnected by welding. Some models are equipped with convection elements to create a vertical direction of preheated air. This allows you to create a kind of thermal barrier for the cold flow coming from the window.
To ensure strength and durability, the structure is painted only after full assembly. When buying, be sure to carefully study the coating, as this affects further operation. In areas painted poorly, corrosion may occur. Panel radiators are designed for the normal pressure created in the central heating system. The length can vary from 40 cm to 3 meters, and height. From 20 to 90 cm. The size must be calculated based on the total area of the room.
Connection to the coolant can be from the bottom or side, so when choosing, you need to take into account the location of the pipes of the heating circuit.
- A light weight;
- Simplicity of installation;
- Quick warming, which allows saving utility services;
- Attractive appearance;
- Compact size.
Types of radiators most often used in apartments
Today the market presents a wide variety of heating devices that differ in appearance, material and technical parameter. As a rule, it is the material that determines the main differences in radiators.
Cast iron radiators: which is better to choose?
This type of battery is familiar to us all, if only because in absolutely all Soviet apartments, it was the bulky cast.Iron batteries that were previously stood before.
But today, these heavy structures of standard size, painted with enamel paint, are far into the past. Stylish analogues are replaced by them.
Stylish, powerful and effective, today they make up serious competition to modern analogues. Cast iron has excellent heat conductivity, it heats up for a long time, but at the same time it cools down just as long. Even after a decrease in the temperature in the system or even after disconnecting the coolant, such a battery will give its heat for some time for some time.
The residual number of heat conservation in cast.Iron radiators is 30 %, which is twice as much as in steel and aluminum products.
Cast iron is a very durable and reliable material that can withstand the working pressure of 25-30 atmospheres. Given the average indicator in 16 atmospheres, even powerful hydraulic boards and failure of the central coolant are not terrible for such batteries.
Another feature of cast.Iron batteries is their versatility. They can work with pipes from any material. Thus, purchasing cast.Iron radiators for the apartment, you will not need to change the entire system of pipes.
Cast iron batteries have a universal connection
As for the quality of the coolant, cast.Iron batteries are perhaps the most unpretentious in this regard. The thick layer of cast iron is not subject to corrosion, which means that such radiators will stand for more than a dozen years in the apartment, where pH water fluctuates within 7-9 units.
As a result of prolonged interaction with water, a black sediment is gradually forming on the inner shell of a cast.Iron radiator. It is he who creates a protective film that prevents the penetration of oxygen to the metal. If you observe all technical standards of operation, then the failure of cast.Iron batteries is out of order due to the destruction of the metal is extremely rare.
Modern cast.Iron radiators are covered on the outside with special protective paint at the factory. At home there will no longer be necessary to color them every year.
Modern cast.Iron radiators are painted at the plant with special paint
Is Your Central Heating System Losing Pressure?
The smooth surface provides simple care, dust is practically not gathering for them. In addition, gases are practically not formed in cast.Iron batteries, which guarantees simple care for them. There is no need to constantly lower air, removing air traffic jams.
If earlier, in Soviet times, it was possible to purchase cast.Iron batteries of only one size, today manufacturers offer a wide variety of these units, distinguishable in size and appearance.
This will significantly expand your choice, helping to choose stylish radiators for the design of the room and to create an optimal temperature regime in the room. Foreign manufacturers offer very original design solutions in retro style, decorated with ornament and casting.
Depending on the size of the room, the structure of cast iron can be increased. The required number of sections is selected based on the following parameters: the number of windows, doors, room area and climatic belt. If in domestic structures the volume of filling is 1.3 liters, then foreign companies offer cast iron radiators with a volume of 0.8 liters. The most popular foreign manufacturers that offer the optimal ratio of price and quality today can be called Konner, Roca, Demir, Guratec, Retro Style, Demir Docum in the domestic market. In terms of characteristics, Russian and Belarusian batteries MS-140 and BZ-140 are also not inferior, but their price will be 2-3 times lower than foreign manufacturers.
If earlier, to install a cast.Iron radiator, it was necessary to score a powerful bracket into the wall, damaging the finish, today many manufacturers produce stylish radiators with floor fasteners.
But, speaking of cast.Iron batteries, it would be unfair not to mention some of their shortcomings. These products are extremely heavy, which greatly complicates their installation. To attach the battery to the wall, you need to use bulky brackets, which does not always fit into the general style concept of the room. In addition, no matter how stylish they may be, not all products from this material will fit into the modern design of the apartment.
Cast iron has a very weak inertiality. Yes, it cools slowly, but this is not always an advantage. With such a radiator, it will not be possible to quickly adjust the optimal temperature in the room. For houses with an individual heating system, it is this property of cast.Iron batteries that can become a decisive. The operation of such products will be too false.
So, summing up, we highlight the main pros and cons of cast.Iron batteries:
- Low cost;
- High strength and reliability;
- Universality and compatibility with pipes of different material;
- Simple operation;
- Low requirements for the quality of the coolant;
- Corrosion is not formed;
- Long.Term operation.
If you still decide to independently install cast-iron batteries in your apartment, then step-by-step instructions will help you do everything right.
Construction myths 2: The battery should be under the window.
Quite often you can hear the opinion that the battery is mandatory (!) should be under the window. Otherwise, trouble. There will be condensation, damp, mold on the windows and in winter and frost. Well, other horror stories.
In order to understand the condensate on the window or not, it is necessary to figure out what the dew point is how it arises and what depends on, and this, in turn, pulls such concepts as relative and absolute humidity. Not difficult, but explaining all this, not so fast. Therefore, I will not clutter up the article and focus on this attention.
So the first thing you need is a sign of water content in the air at 100% humidity.
The coldest five days t =.27 g. Temperature inside 20 and humidity 40%. (why 40 and not 50 or 60 read on)
To find out how much water is contained in the air, it is necessary to divide the value with one hundred percent humidity by 100 and multiply by 40.
In this case, it is 17.31/10040 = 6.924 g/m3 of air.
The condition of condensation loss is exactly one, the amount of water in the air should exceed the condition of 100% humidity. In this case, it is 5 degrees 6.802
That is, in simple language, if in the room 20 and humidity 40% then, by placing a item of more than 100% (at the contact point) in the room and the condensation will get colder into the room. Probably everything observed this effect. A classic example of a bottle of beer that was taken out of the refrigerator, it fogs. Here it is, the same condensate.
The heat transfer resistance in a plastic frame is always higher than the double.Glazed window, therefore, I will only take into account it in the calculation, and I will not take the most “warm” option (the greater the value of the heat transmission, the better)
In simple language, even in the coldest five days, on the surface of not the best double.Glazed window, there are no conditions for condensation necessary for condensation.
But the first objection that may occur immediately. And why did I take the humidity of 40% and not 50 or 60% ?! After all, by:
SP 50.13330.2012 Thermal protection of buildings. Acted edition of SNiP 23-02-2003
Why 40% then ?! Whether the author pulls the results ?!
The fact is that in winter, air on the street is always much dryer than in the summer. And in the house there must be ventilation and air from the room is constantly replaced by a more dry street.
The same Ryazan. Street air at t =.27 and 90% air humidity.
Once in the room, the air heats up to 20 and its relative humidity becomes equal
0.4095/17,31100 = 2.3 % ! Therefore, it is in winter that the problem of additional hydration of air arises. And even the 40% humidity I have accepted are sometimes not achieved. Air humidifiers include in winter and not in the summer!
The next question is, what will happen if you put very cold double.Glazed windows where there are not, where it is very cold.
If in Yakutsk with his.52 Set single.Chamber double.Glazed windows. Then of course condensate will fall on them. But in Yakutsk they will put warm windows with R = 0.73 and Condensation will not be the same.
There is no condensate for modern problems, or not to have a battery under the window, not a necessity.
So where did this come from that the batteries should be under the windows ?
There is nothing secret, the “legs” of this opinion are growing from the time of the USSR. When the frames were wooden and there were no double.Glazed windows. Such windows not only had poor heat transfer resistance. R = 0.19 also passed the air from the street through themselves (infiltration).
Naturally, such windows were very cold. The infiltration struggled sealing in winter all the seams with paper (there was no tape). But this did not really help. Therefore, it was necessary to create both an elevated air temperature in the area of the windows, and sell the thermal curtain. Therefore, batteries were placed mainly under the windows.
Your arguments are certainly correct and everything is calculated correctly, but you understand that the resistance to heat transfer even in a modern double.Glazed window is significantly lower than at the walls of the house (if the house is modern), and the installation of heating devices under the windows gives like a thermal curtain (like winning Write). Of course in a private house. Master-barine, and you can do as you like (so far!!), but n. 6.4.4 joint venture 60.13330.2012, prishes of heating devices under light openings no one canceled. Devices should be under the windows, but if additional calculations are needed, then they are already put where they like it more.
And the fact is that the windows. The only place in the room where any wardrobe will not stand and block the battery. Yes, and it is inconvenient if the battery was somewhere near the ordinary wall, you can’t put a closet or bed there already.
I also rushed from one camp to another, and then made a warm floor and realized that here it was happiness!
Probably my modern windows with double.Glazed windows (in Sochi) are not very educated, so they flow godlessly. But I thought that there was simply no radiator under them. But today I will tell them that this is just a myth so that they do not get fired.
How to determine good packaging of steel panel batteries?
Steel radiators must be placed in protective packaging, which allows you to install a heating device without the need to circumcise it. Good steel radiators should be packed in a heat.Shaped film. Dopaging under the film usually consists of 2 corrugated corps located along the radiator from below and on top of durable sheets. In addition, radiator angles should be protected by four plastic protective pads.
The basic requirements during the transportation of steel panel radiators are as follows:
Where we will place?
Usually radiators are placed where the largest heat loss in the apartment is expected. As a rule, this is a zone under the window or from the side of the corner wall of the house. Even if the apartment is located in a well.Insulated house and is equipped with double.Glazed windows, the window is the place where in the cold season there will be the smallest air temperature.
The choice of the optimal place for the radiator
If you do not put the radiator under the window, then the cold air penetrating outside will gradually go down and spread through the floor. From physics lessons, we know that warm air moves upward. So, leaving the battery and rising to the ceiling, it will create a kind of barrier for a cold stream from the street. According to the recommendations of SNiP, the size of the battery should occupy at least 70 % of the window, otherwise the warm air will not create the right barrier.
With too short batteries, a situation may occur when cold zones will form on the sides. As a result, the room will have low temperature even with a powerful radiator. As you can see, not always the power of the battery provides a comfortable microclimate in the apartment.
Bimetallic heating radiator care
The name of the heating device is not by chance. The word “Radio” is translated from Latin as radio. The batteries familiar to us radiate heat, heating the air indoors. The classic heavy cast.Iron batteries were replaced by elegant flat heating panels.
The heating radiator got its name bimetallic thanks to a design made of two types of metal: steel and aluminum. Aluminum plates emitting thermal energy are felled on steel tubes through which hot water passes. Steel tubes can withstand high water pressure, and aluminum elements are characterized by high heat transfer.
Anti.Corrosion properties; high heat transfer; withstanding powerful water pressure; aesthetic appearance; Harmonious combination with any interior of the room.
Radiators are installed in a horizontal position; For effective heat transfer, it is necessary to observe the distance to the floor 6.0-7.0 cm; to a windowsill of at least 5.5-6.0 cm.; Under the window the radiator is mounted in the center; Painting a bimetallic radiator reduces the level of heat transfer by 10-12 %; Several radiators in one room are mounted at the same height from the floor.
Betallic heating radiator before installing the radiator, it is recommended to cover the wall section with a reflective film that will help reduce heat loss in the heating season. The protective film from the new radiator is removed after the full installation and connection of the radiator to the heating system.
Turn off the battery in a certain sequence. The first outlet is disconnected, then the reverse eyeliner is turned off and the air is lowered through the shut.Off valve. When the heating system is turned on, the reverse eyeliner is first launched, air is lowered through the shut.Off valve, then the eyeliner is launched. If the radiator does not heat up, there may be an air accumulation inside the radiator. In this case, it is necessary to lower the air accumulated in the radiator. In order for pure water to get into the radiator, it is recommended to install filters that capture solid particles and dirt. The surface of the heating device is cleaned before the start of the heating season with warm water and detergent.
You can not wash the surface with a hard brush, use acids, alkalis, products with abrasive particles. Without a heat carrier, the radiator can be no more than 14 days a year in the heating period. The rest of the time the radiator must be filled. Once every 2 years it is necessary to rinse the sections of the radiator inside running water under large pressure.
Is it possible to paint radiators?
Certainly. But first you should clean the surface, cover with soil with special additives against corrosion. And choose the right paint, it should withstand high temperatures. Remember that too many layers of paint will lower the level of heat transfer. In addition, dark objects are better radiated heat. Therefore, it is worth abandoning the traditional for white radiators.
Important! Modern aluminum radiators paint at the factory with a special powder composition. At home you cannot achieve such smoothness of the coating. In addition, while the heating device is under warranty, it cannot be repainted.
Care for radiators in the absence of heating (off.Season)
To carry out work on their equipment, heat supply organizations usually drain water in the off.Season. Without a coolant, in almost all types of radiators, the corrosion process is enhanced (to a lesser extent. In cast.Iron radiators).
According to the recommendations of manufacturers empty radiators, you can keep for no more than 15 days. Therefore, measures should be taken to maintain water in heating devices. Typically, for this, the lower shut.Off valve is blocked. During the side connection of the radiator.
At the same time, the upper crane is left open. Through it the pressure and corrosion products and hydrogen during aluminum oxidation). With a complete disconnection of the aluminum radiator, it should be opened by the Maevsky crane. The accumulation of hydrogen can lead to an increase in the pressure and depressurization of the product.
To maintain the efficiency of heating devices, especially radiators, it is recommended to flush them. Radiators are washed once every 2 to 5 years, the flushing frequency is determined to reduce the heat transfer of the device. The simplest cleaning method is flushing through a tap hose.
To do this, the radiator is freed from the water through the impassable lower plug, disconnected from the carts. The hose is connected to the upper hole, flushing water flows from the bottom.
Removed heating devices for washing
Washing is carried out until the water is completely brightened up. Then the radiator is installed in its place. For the convenience of removing and servicing heating appliances, they should be installed on collapsible joints such as the USA DOST. You can read about this in detail here.
Cast iron radiators should be painted in 5-6 years, while you need to use special heat.Resistant types of colors and enamels. Coloring is carried out after preliminary preparation of the surface of the devices in several layers. The coloring is also relevant for steel products. With a violation of the coating in the place of damage, the process of metal corrosion is significantly accelerated.
All the recommendations given in this article definitely must be followed in apartments with centralized heating. In autonomous heating systems, the chemical composition of the coolant practically does not change, the pressure in the equipment is much less. But still, it is not recommended to drain water in the offseason there. This will slow down the corrosion process.
Timely care, proper operation of heating radiators significantly extend the service life of products, support the quality of their work at a high level. Service measures take little time, but the result will show themselves. The radiators will last a long time, they will not need to replace them for a long time (and, accordingly, financial costs).