The problem of heating a private house is best solved by connecting it to the central gas pipeline. But even in areas located in close proximity to the capital, there are places where this possibility does not exist. The best option in such circumstances - autonomous gasification.
Many people are confused by the considerable cost of installing a gasholder in a private house, but the money spent will pay off with the cost-effectiveness of servicing such a system.
We propose to find out what advantages the arrangement of individual gasification gives, how to choose the right tank and what requirements to follow when installing it. Understanding the installation technology will help monitor the quality of work performed - the continuity and safety of gas supply at home depends on this.
The content of the article:
- Advantages of installing a gas tank
- List of works on autonomous gasification
- Regulatory requirements for autonomous gasification
- The nuances of installing a gas tank
- How to recognize poor-quality installation
- Conclusions and useful video on the topic
Advantages of installing a gas tank
If you compare independent gas heating with electric systems or heating with the use of liquid boilers, then the total monthly payment will be several times less.
Having installed a gas-holder on the site, the owner of the country ownership will receive the following advantages:
- Complex reliability. The guarantee of uninterrupted and safe operation of the heating system, confirmed by relevant certificates.
- Ease of use. He himself will open and end the heating season, independently adjusting the supply of blue fuel, taking into account the need for it.
- Efficiency. It will fill the gas tank maximum twice a year, which is much less than most other fuels.
How often it is necessary to fill the tank depends on the rate of gas consumption and the capacity of the gas-holder itself. Choosing this important node for autonomous gasification, one should proceed not only from the intensity of gas consumption, but from economic feasibility in each particular case.
It happens that more frequent refueling is beneficial for a smaller amount than the cost immediately for a large amount of fuel, which can be overwhelming for the budget.
To ensure efficient heating, it is necessary to select the gas tank correctly and to fill it in a timely manner, without waiting for it to become critical.
To supply the house with fuel without interruption, it is necessary to replenish its reserves when a maximum of 25% of liquefied gas remains in the gas-holder. At the same time, if we take into account the fact that in the period February - June gas consumption volumes usually fall and the price for its delivery decreases, then we can also save money.
The composition of the gas also depends on the season. At the end of autumn and by the end of the winter period, suppliers are filling up with a "winter" type of gas. It has an optimal percentage ratio between the amount of propane and butane in blue fuel, which contributes to the maximum evaporation of hydrocarbons.
This is true for country houses, where they live permanently. For properties for summer holidays, where gas is needed only to prepare food and take a shower, you can fill up the gas tank in the summer.
List of works on autonomous gasification
Only those organizations that have licensed them have the right to perform work associated with autonomous gasification.
The list of works performed by them may be different, but mainly it includes:
- equipment equipment and its delivery;
- installation of a gas-holder;
- laying of necessary communications to the house;
- pressure testing;
- filling the system with a gas mixture;
- periodic maintenance of the tank.
Individual companies make the installation of the necessary equipment in the house. By agreement, the contractor may also perform additional work: installation of an air collector, gas contamination sensor, ground loop, system setup, installation and gas boiler harness.
The services of the company are expensive, but after doing all the work, it will be responsible for it.
In order to legally use the gas tank, it is necessary to assemble a package of documents. You can do their own design or immediately entrust it to professionals of a specialized company (+)
If you decide to independently collect all the necessary documents, you need to start by writing an application to the GDS for the issuance of technical specifications for autonomous gasification.
TU issued for free. Then you will need to make an advance to begin the design work. The on-site specialist will evaluate the conditions and give an opinion on the basis of which the specifications will be drawn up.
After receiving them, you will have to submit a new application to the project organization, on the basis of which and received technical conditions the project will be developed. Next, you need to coordinate it in the supervisory authorities - environmental, fire, architectural, electricity, as well as in the gas service.
Permission for autonomous gasification is issued by Rostekhnadzor after registration of all documents there.
Will remain after choose a gas tank, buy pipes and components, to ensure that all requirements set forth in the specifications. The price of installation is directly influenced by the volume of tanks and their quantity, the list of work being done. Depending on how much a good gasholder costs, it will pay off in 2-3 years.
This table shows approximate prices for the installation of autonomous gasification. Based on them, you can choose the appropriate system configuration, based on the needs and financial possibilities (+)
The most convenient season for independent gasification works is the summer period. Typically, the owner of a country house relies entirely on the contractor in terms of compliance and the technical side of the process.
Even taking into account the fact that the owners of gas holders have little interest in GosNadzor, the contractor must comply with all regulatory requirements and rules for the use of containers for LPG.
Regulatory requirements for autonomous gasification
Poor installation can have unpredictable consequences, so it is advisable to monitor the progress of work to the customer. To delve into the essence of the issue should be at the design stage. The main thing is to choose the right capacity in accordance with the area of the house. The volume of the tank for a private house ranges from 2,700-10,000 liters.
Regulatory compliance is important. distance from the gas tank to the house and other objects. The indicator depends on the volume of the tank. Thus, the minimum distance between the gas tank 10 cubic meters. m and the house - 10 m.
To install a gas-holder it is necessary to prepare a pit of the required dimensions. This work, as well as the supply of the tank itself and its commissioning and gas filling, can be performed by a company that holds a special license.
There are several basic regulatory documents relating to the operation of gas holders.
Although the requirements set forth in many of them apply to entrepreneurs and enterprises, the regulatory authorities can apply them to individuals:
- In applications to Federal Law №116 gasholder called dangerous object. In this regard, the safety rules laid down in this law are applicable to such a reservoir.
- Code 62.13330 concerning the design, material for the pipeline, installation, quality of the gas mixture, protection against corrosion of LPG facilities.
- There are several requirements for containers for LPG related to installation, testing in the codes of rules SP42.101 and SP42.103 from 2003, as well as SP.42.102 from 2004.
In order not to be responsible for the consequences of unprofessional installation of a gas-holder, you need to conclude an agreement with service company, which stipulate the warranty period for the object, in addition, must be project.
What requests must the tank meet?
A good gas tank must meet the requirements for metal thickness, the quality of anti-corrosion coating, waterproofing of the case, safety and control valves. It will be equipped with reliable supports, eliminating the possibility of the occurrence of deformation processes of the tank bottom.
A prerequisite for an underground tank is the presence of a high neck.
Tanks for liquefied petroleum gas produced in Russia, designed for a 20-year service life, subject to proper installation
Based on the requirements of GOST, gas holders are made of steel sheet metal with a minimum thickness of 5.5 mm. Outside and inside the tank has a protective coating.
On our site there is a series of articles devoted to the choice of a gasholder for a private house and cottages. We advise you to read:
- Gas-holder for the dacha: mini options for the arrangement of summer cottages
- Mobile gasholder: purpose, design and installation features, placement requirements
- Gas-holder Antonio Merloni (Antonio Merloni): model range and equipment selection criteria
The nuances of installing a gas tank
In the CIS gas holders are not as popular as in Europe. The rules of their installation are somewhat different. If in European countries land tanks are mainly used, in the CIS this option is not always acceptable. There are more stringent requirements for the distance from the gasholder to different objects.
If they are done, in most of the standard plots there is simply no room for a ground tank, and in Europe they are installed even close to the house.
In Europe, gas tanks are filled with pure propane, and we have a mixture of propane and butane in the ratio of 1: 1 or 7: 3. In order for the LPG mixture to work, it is necessary that evaporation take place, and at low temperatures this is impossible. In order not to remain without heat in winter, the tank must be equipped with a special installation for evaporation.
The cost of the equipment itself and its installation depends on the model of the tank, the volume of earthworks, additional equipment. Questions about how much domestic and imported gas-holders will cost should be clarified in advance.
Note that prices do not differ much. The capacities released by our manufacturers, unlike the European products, as a rule, have a high mouth.
The construction is cheaper without it, but then the position of the site with reinforcement will not be so convenient. The location on a hill allows you to protect it from moisture, especially during the spring floods. If water enters the gearbox, the gas supply will stop.
To reduce the pressure acceptable for the boiler operation, there is a valve and a reducer on the tank, which performs this task. In winter, the gearbox may cease to perform its functions due to freezing. It is very simple to correct the situation by warming it up with boiling water, but on condition that the main line is turned off
Recently, gas-holders without a neck appeared, instead of it, a number of high tubes, covered with a metal casing, were included in the design. Such a solution made it possible to reduce the cost of the product and place the reinforcement at a safe height.
Structurally, the gas tank is designed so as to exclude both gas leaks and its ignition. Its monolithic structure well resists pressure from the inside and various influences from the outside.
Tanks for LPG are sold complete with valves providing the extraction of the gaseous phase, filling valves, shutting off the gas supply when the tank is filled to the set level
In addition to the valves, the tank is provided with safety valves designed to relieve excess pressure with ball valves, which regulate the fuel flow.
Some companies offer to buy reconditioned tanks at a price significantly lower than new ones. You should not be tempted by cheapness, the consequences of such savings can be the most unpredictable.
At installation of the tank there are several nuances which performance needs to be controlled in the course of its installation. Everything that will be hidden in the ground must be reliably protected from corrosion. In this case, the usual fasteners are not suitable, it is made of stainless steel or provide anti-corrosion protection.
When backfilling should ensure that the sand was not loam, stones. Sand is covered with geotextile, otherwise clay soil will fall into it, which over time can cause swelling with all the consequences for a gas tank.
Often contractors provide cathodic protection devices as an extra service. In fact, without this option, the metal reservoir as a result of the influence of stray currents, salts and water will collapse much faster than its service life.
When concluding a contract, it is imperative to insist that it includes an item on the installation of electrochemical protection.
You should know that such protection is of two types - active and tread. The first of them is used in conjunction with Russian-made tanks made of steel 09G2S. This material is slightly resistant to rusting.
To increase the service life of the tank, they mount a 0.75 kW cathodic protection station that consumes electricity. For this reason, this method of protection is expensive.
Imported gas tanks are made from higher quality material. They are protected from corrosion by the tread anode-cathode system. It represents the aluminum elements with electronegative potential, connected by means of a wire with an underground gas-holder.
The consequences of negative effects affect the tread - it is oxidized, and the surface of the metal container is restored.
Power supply to the tread protection is not required, but the protector itself must be periodically changed. To do this, make a hole near the gasholder to insert another protector into it, then connect the wires to it (+)
On European-made gas-holders with integral epoxy coating, protectors change on average in 5 years. The steel from which the Polish tanks Avtongas are produced does not practically corrode. Protection is updated here at intervals of 15 years.
On domestic tanks with a bitumen coating, and on imported ones with an epoxy coating that has not been checked during installation, they replace the protectors annually. In this case, the protective anode is consumed very quickly, because due to the increased permeability of the coating, he has to actively restore the surface of the container.
How to recognize poor-quality installation
In order not to have to invest additional funds in the autonomous gasification system of your home Due to the poor quality of the work performed by the contractor, it is necessary to pay attention to several important moments.
It happens that a contractor when installing a gasholder of domestic production, made of steel with weak anti-corrosion characteristics, establishes passive protection or is about to miss this. moment.
In this case, you need to show perseverance and make him install an active cathodic protection system regardless of the coating material. The cost of the gas tank will increase, but its service life will increase.
When they offer to purchase an old gas tank, you need to know that its restoration is often just a sweep of problem areas and a layer of protection. If this does not comply with the technology, then all this is nothing but props
The surface of the container with a layer of bitumen coating of more than 2 mm during the operation shrinks and begins to crack. Passive protection in this case is powerless. Need active electrochemical protection.
Gasket coating of domestic or imported epoxy or bitumen before placing the container in the pit, you must check the spark detector. If the contractor did not do this, cathode active protection is necessarily required.
The customer should also check the quality of the fastener of the container to the plate. According to the rules it needs to be fixed with stainless steel anchor pins for special paws.
If there are no legs in the form of paws, use ballast slings, with which the tank is attached to a slab with a rubber gasket. The use of these lines must be approved by Rostechnadzor.
Do not allow the installation of the tank on a hollow plate, because of this, it can float together with the base. It is necessary to make sure that the condensate collector is installed, otherwise the liquid during freezing will form ice plugs in the pipeline and interfere with the movement of gas.
The pipeline must be laid below the freezing level of the soil layers. It must be installed in such a way that a slope forms in relation to the condensate collection tank.
Reinforced concrete foundation for fixing the tank ensures its reliable fixation. Fastening is carried out using stainless steel pins.
The gearbox must be mounted on the tank itself. For gas pipelines of both medium and high pressure, only steel pipes are used in high-quality polymer insulation.
PE 100 polyethylene pipes are more suitable for the installation of low pressure gas pipelines. The gearbox or charging valve should not be allowed to set below zero.
A compensator must necessarily be present at the base entry, otherwise as a result of shrinkage at home, the input may collapse. The basement itself must necessarily be all-welded and with a steel tap.
Additional information about the installation technology of the gas tank on the private plot is presented in this article.
Conclusions and useful video on the topic
What is a gas-holder and its design:
Advantages of a gas-holder from the point of view of the owner of a site:
So that the cost of installing and connecting a gas tank for a country house is not unnecessarily burdensome, and the costs paid off in short terms, it is necessary that the work is performed by experienced specialists - design engineers, welders and installers who have passed the appropriate certification
Of great importance is also the choice of the optimal volume of the gas tank, which will make it possible to fill it not too often. A professionally selected and installed tank will serve for a long time and will not cause much trouble.
Is there anything to supplement, or have any questions about the arrangement of autonomous gasification of the house? You can leave comments on the publication, participate in discussions and share your own experience in the selection and installation of a gas-holder. The form for communication is in the lower block.