The decision to connect gas to a private house is justified, since this type of fuel is the cheapest and therefore in demand among consumers. If you also decide to implement a gasification project, you should be aware that a mandatory step is the design of gas supply, which is required to ensure safe operation and connect a residential facility to centralized networks.
Representatives of licensed contractors can carry out design work, however, the customer can familiarize himself with the SNiP, while gas supply will be implemented with the participation of the consumer, who will be able to choose a rational scheme.
Safety measures
Gas is a flammable explosive substance. Even if you deviate a little from building standards, this can cause a tragedy. The gas is toxic and dangerous to the environment, the designer must take into account all these nuances. The owner of the house should be aware that it is recommended to order the project during the construction of the dwelling, since for the heating device it is necessary to allocate a separate room forboiler room, providing effective ventilation inside.
Designing a gas supply system
Gas supply design will determine the cost of the work, everything will depend on the width of the pipes, the principle of wiring, the number of bends, the number of pressure stages of the selected equipment and materials. The gas pipeline that will lead to the house can be laid in one of two ways: open or underground. The underground gas pipeline costs 1.5 times more than the implementation of the above-ground method. But the pipes in this case will be reliably protected from mechanical and atmospheric influences. Underground systems are safe and reliable, but damage is more difficult to find and fix.
When the design of the gas supply is carried out, it is already possible at this stage to decide whether the pipes will be above the ground. Despite the fact that such work is cheaper, some sections of the gas pipeline will be threatened by corrosion, they can be connected spontaneously, which is dangerous for the environment. The price factor does not always influence the choice of the method of laying the gas pipeline. There are conditions that do not depend on the desire of the customer, among them are soil activity values that do not meet the requirements of SNiP, which can lead to rapid corrosion of materials.
The need to lay the gas pipeline underground
In some cases, high-voltage power lines are located close enough to require laying a gas pipeline underground. If the underground pipeline will cross the site of the neighbors, it is not always possible to obtain their consent. Gas supply to a private house can be equipped using the technology of laying pipes underground when the atmospheric temperature in the region drops below 45 degrees. Sometimes a project for connecting a gas pipeline to a residential building is a combined option that combines both laying methods.
Features of designing internal networks
Gas supply of a private house can be equipped only after the calculation and design of the system. These works are based on individual factors, on the basis of which the customer will select equipment by capacity and type. There are also general requirements for creating projects, the observance of which is mandatory. For example, to install the unit, it is necessary to allocate a boiler room, which should not be located in residential premises. 4 square meters should be allocated to one device, and the height of the ceilings should not be less than 2.2 meters. The doorway should have a width of 0.8 meters, and the size of the windows is calculated taking into account the 0.3 meters relying on 10 cubic meters of room.
Furnace should be finished with non-combustible materials. Installation of gas equipment should be carried out in a room where electricity, gas and water supply, as well as sewerage should be carried out. To ensure the safety of electrical communications, grounding must be provided. Sewerage is required for emergency runoff. The boiler room is designed taking into account the presence of a ventilationsystem and two channels for the chimney. The additional first channel is needed for installing the chimney, while the second one is for cleaning.
If you decide to purchase equipment with a natural outlet, you will need a ventilation grill through which fresh air will penetrate. If you use gas as a source of heating in a country house, then the chimney should be made of gas-tight materials. The upper part of the chimney must be above the roof. The boiler should be located away from sources of open fire, free access should be provided from all sides.
Recommendations from specialists in the design of the gas supply system
If the boiler has the ability to forcibly cope with the removal of combustion products, then there is no need to organize natural draft. This task will be performed by a fan that is installed in the pipe above the roof ridge. The most commonly installed coaxial chimneys, which consist of a pair of pipes with different diameters. Through the external channel of the chimney, fresh air will enter the room, warming up due to the energy of the flue gases escaping outside. The design reduces fuel consumption and increases the efficiency of the device.
Gas boiler installation
Work on connecting gas to a private house is carried out according to SNiP 41-01-2003. These codes and regulations mention that the gas boiler can be located in the basement or basement,from where it is necessary to equip an additional exit to the street. If the equipment is supposed to be located in an extension, then it should be located near the blank wall of a residential building. The heating system is pressurized to 1.8 atmospheres, deaerated and checked for leaks.
The operation of the boiler must be supplemented by a voltage stabilizer and an uninterruptible power supply. It is important to take into account some exceptions, among them it should be noted that there is no need to normalize the volume of the boiler room if the equipment has a closed combustion chamber. In this case, a window with access to the outside is not required. If you purchased a boiler with a capacity of 23.3 kilowatts, then 2.5 cubic meters of gas will burn per hour. To ensure complete combustion of this volume, 30 cubic meters of air per hour will be required. In the absence of sufficient air during operation of the equipment, the gas will not burn completely, which will cause the formation and accumulation of substances harmful to human he alth.
Features of installation work
If you decide to carry out work on connecting gas to a private house, then the equipment must be installed in the boiler room so that it is illuminated through the window opening. Pipes of the gas pipeline must be made only of metal, the use of flexible hoses, which are applicable only to connect individual consumers, should be abandoned. It is important to correctly calculate the cross section of the chimney, which, according to the rules, corresponds to the power of the device. If the last ofof the mentioned parameters is equivalent to 30 kilowatts, then the diameter of the chimney is 130 millimeters. The diameter of the chimney increases to 170 millimeters if the boiler output is 40 kilowatts.
The gas connection diagram should be considered by you before starting work, but the system should be started by professionals. The cross-sectional area of the chimney must not be less than the cross-sectional area of the opening for its connection. The power supply system of the equipment should be supplemented with an automatic built-in thermal and current protection. To prevent gas leakage in the room, it is necessary to install a gas analyzer, but the electric valve will independently shut off the fuel supply.
Additional requirements
Work on connecting gas to a private house should be carried out only after heating equipment has been installed. It can be located in the basement, but at the same time the private house must be single-family. If we are talking about an apartment building, then it is forbidden to install a gas boiler in the basement. The device must be equipped with a gas meter by installing a ventilation system in the upper part of the boiler room. Work on connecting the house to gas is carried out according to the aforementioned SNiP, gas supply, subject to all rules and regulations, will be safe. There are norms and rules number II-35-76, from which you can learn about the features of installing boiler equipment.
Documentation
Documents for connecting gas must be collected by you to agree on a gas supply project, which is carried out in GorGaz. To do this, preparetechnical passport of the boiler, operating instructions, sanitary and hygienic certificates, as well as the conclusions of the examination on the compliance of the equipment with the necessary requirements.
