Turnkey projects involve fully completed construction, production or installation of facilities that can be used immediately. Private property owners often choose this method of installing new gas equipment.
It is much easier to order a turnkey gas holder in one organization than to conclude agreements with several companies. In any case, installation is carried out strictly in accordance with the requirements and standards.
In this material we will understand the stages of turnkey installation of a gas tank.
The benefits of a turnkey project
Owners of private housing, wanting to save money, sometimes try to do some of the work on their own. And it is advisable if there is experience in the installation or connection and there are no legal barriers.
However, just in the case of organizing an independent gas supply for self-intervention, “loopholes” practically remain:
- all installation, equipping with additional equipment, connection, commissioning must be carried out by an organization that has a special license;
- TU development and project design are also carried out by authorized companies;
- Before concluding an agreement with the installers, the owner collects a package of documents (technical specifications for gasification of the house, title documents for the land, the plan of the plot, coordination with many authorities, etc.), which takes a lot of time.
If the owner of the house first encounters the design and installation of an autonomous gas system and at the same time is a busy person, it is best to contact a private company that has been successfully installing turnkey gas tanks for a long time and servicing gas systems.
The company, which has 10-15 years of experience in autonomous gasification, is provided with a staff of qualified employees who thoroughly know all the rules and regulations of equipment installation
Representatives of a private company, as a rule, have the necessary connections in various related instances, so the process of approval of documentation will be much faster.
The advantages of the “complete package” also include the operational installation of the gas tank, including earthwork, transportation and installation, connection and pressure testing.
The company's specialists are fully responsible for the implementation of all installation work, which is carried out in accordance with the standards of safety regulations, Construction Norms and Regulations, GOST and SP, and upon completion of work they give a guarantee
If errors occur during installation, they are corrected free of charge. The conclusion of a service agreement (prevention, gas injection) with the company installing the gas tank facilitates the repair or replacement of equipment. And more about the cost of installing a gas tank in a private house can be found in this material.
Installation requirements for gas tank
An autonomous gas storage facility, like a gas pipeline, is a high-risk construction, therefore, a number of requirements are imposed on the installation and connection of gas equipment.
They are set out in regulatory documents: for example, in PB 03-576-03 you can find out about the installation conditions of vessels under pressure, and in SP 62.13330.201 - On the general provisions for the construction of gas distribution systems.
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The minimum distance for installing horizontal models from the gas tank to the residential building is 10 m, to the foundations of technical buildings - 8 m
Installation in the ground is subject to the provision of electrochemical protection against corrosion and with mandatory access to fittings (pressure gauge, safety valve, valve for gas supply)
After the tank is installed, filled in, connected, the territory allocated for its installation must not be covered with asphalt or concrete, planted with shrubs and trees
It is necessary to provide access to the tank fittings, for which a technical hatch with a tight-fitting lid is equipped
For regular (1-2 times a year) refueling of the tank with gas, it is necessary to equip the access to the tank or provide a hose supply (up to 30-40 m in length)
The basis for a smooth installation of the tank is a concrete slab from 0.16 m in thickness. The gas holder is mounted on metal supports, which are part of the structure, using anchors and belts
The installed tank is filled with river sand, which has the necessary heat conduction parameters and performs the function of drainage and protective barrier
Installation work for the basement is carried out by representatives of the installation company. The device is welded and covered with protection in the factory, homemade products are prohibited
The distance from the gas tank to the objects on the site
Installation requirements for buried tanks
Territory with installed gas holder
Conditions for further maintenance of the tank
Conditions for refueling a gas tank
Concrete Slab Installation Requirements
Tank Backfill Rules
Basement of the gas pipeline into the building
Similar requirements apply to the gas pipeline through which fuel flows from the tank into the building:
- the depth of the trenches for polyethylene (steel is used extremely rarely) pipes - at least 1.7 m;
- mandatory installation of a condensate collector;
- the slope of the pipe to the condensate collector is 1 cm per 1 m;
- pipes are connected in one piece;
- distance to parallel pipelines - at least 1 m.
When backfilling trenches, the gas pipeline laying zone is marked with a wide signal tape, which is stretched along the entire length of the pipe and sprinkled with soil.
Variants of the contract with the contractor
If the owner of the house is interested in installing a turnkey gas tank, he will have to choose from several different nuances of the options. To expand the circle of customers, companies offer 3-4 solutions. Usually they are called "Economy", "Standard", "Optima", "Premium", "Suite" and similar names.
One of the options for installing a turnkey gas holder for a house with an area of up to 150 m². The main package includes design, the tank itself with valves, transportation, installation, connection, commissioning and commissioning. Earthwork and gas refueling are additionally paid
The choice is good in that you can choose the optimal package, saving on the same earthwork or signing a gas supply agreement with another organization.
The main steps for installing a turnkey gas tank
Turnkey installation involves the execution of all stages of autonomous gasification by the company with which the contract is concluded. However, some control by the owners of the house over the activities of the installers will not hurt.
Designing and selecting a tank
Design documentation is executed only after the specialist visits the facility. The choice of gas tank and the nuances of installation depend on the size of the site, the location of the house and highways, the composition of the underlying rocks, the level of groundwater.
On site, it is decided which tank volume is optimal. This parameter is tied to the area of the house, so even professionals often use correspondence tables.
Horizontal gas holder of the Czech brand Kadatec. Calculation of volume by building area: up to 150 m² - a tank for 2400 liters, up to 250 m² - 4300 liters, up to 400 m² - 6200 liters, etc.
Having experience in installation works, representatives of the contractor can advise on the choice of a gas equipment manufacturer. However, in practice, they, as a rule, are distributors of one or several companies for the production of gas tanks, therefore, they will recommend their products.
It is logical to assume that it is unprofitable for them to offer low-quality tanks, because they are fully responsible for the safety of the facility.
Read more about varieties of gas holders read on.
Options of gas holders for cottages:
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Antonio Merloni brand tanks are known for their vertical models. The advantage of vertical vessels is a low depth, therefore, a higher temperature. They function up to -40ºС
The Polish Chemet plant is known for having permission to produce storage tanks for highly hazardous substances. This means that Chemet gas tanks are manufactured with high quality requirements and are reliable.
Deltagaz is a Czech company, a subsidiary of G.A.M. from Germany, therefore the quality of gas tanks is really German: produced with modern equipment and processed with the latest technology, the tanks are free from any defects
FASKHIMMASH enterprise produces gas holders for implementing government gasification programs, as well as for equipping gas stations Lukoil, Gazpromneft, etc., therefore, we can draw conclusions about the relatively high quality of products for autonomous gas supply
Antonio Merloni - vertical gas tanks
Products of the Polish company Chemet
Deltagaz - Czech gas tanks of German quality
Fashimmash - high and low pressure tanks
After inspecting the territory and selecting a complete set, a detailed action plan is drawn up and an estimate is made up taking into account what exactly is included in the “turnkey” concept.
If any work must be paid extra, this is agreed upon before starting work. Design documentation is provided along with documents from the customer to obtain permission to install an autonomous gas system.
Preparation of foundation pit and trench
Some companies offering autonomous gasification services for village houses and country cottages do not include land work in turnkey comprehensive services or include, but only in “Lux” type packages, that is, the most expensive ones.
Consequently, at the stage of digging a pit and trench, you can save 15-20 thousand rubles. and do the land work yourself.
What needs to be done for this:
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The foundation pit (pit) is torn out in the territory designated in the project. The place is chosen taking into account many factors, therefore, it is not recommended to go beyond the boundaries of the site indicated in the plan. For horizontal models - at least 10 m from the building
The dimensions of the pit are also determined in the project, or rather, are attached to the tank installation instructions. Typically, the depth of the pit is not less than 1.9 m, and the length / width depends on the size of the container. The bottom is covered with a sand and gravel pillow
Installation of a concrete base is a mandatory part of installation work. It provides an even, horizontal location of the tank, stability, prevents bottom subsidence. The plate must have holes or loops for attaching the gas holder
Given the level of soil freezing, a trench is dug at a depth of not less than 1.7 m. Width - about 0.6 m. Finishing of land work at the foundation of the house - in the place where the basement of the gas pipeline will be brought into the building
Step 3 - installing the concrete slab
Step 4 - digging a trench to the house
Backfill is carried out after installation of the gas holder and valves, connection and testing. For backfill, river sand is used, and only for the upper layer (20% of the total backfill) native soil is allowed to be used.
Installation of a gas tank in a pit
Gas tanker transportation is carried out by special equipment. Mini-tanks can also be delivered by our own transport, but for cottages, as a rule, they use large tanks from 2000 l. If there is an entrance to the pit, then the best option is a truck with a manipulator.
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In order not to damage the walls of the gas tank, smoothly and accurately install it on the base, several pairs of working hands will be required for unloading
Before fixing the gas tank to the anchors or belts, it must be aligned with the concrete base and the surface of the earth. If the depth of the pit does not match the height of the tank, you will have to get it, and deepen / reduce the pit
There are several ways to mount the tank to a concrete slab, but you must choose the one recommended by the manufacturer. Anchors, brackets, belts, cables or other devices for fixing are supplied with the tank
This stage is carried out at the end of the strapping, connecting shut-off and safety valves, installing a condensate collector, etc. In the process of backfill, tamping is used, but not concreting
Step 1 - installing the tank on a concrete slab
Step 2 - Leveling the Tank
Step 3 - fixing the gas tank to the stove
Step 4 - backfilling with sand
Installation is carried out by an organization licensed to work with gas equipment. It is strictly forbidden to independently install a gas tank, connect a gas pipeline and other equipment to it.
Organization of basement entry into the house
Low-pressure gas is introduced into the building using a special technology called “basement entry”. At its core, this is the transition of a polyethylene pipe that goes from the gas tank to a steel pipe that goes inside the house.
For input installation, the shortest path is usually chosen. During installation, make sure that the gas pipes do not intersect with other utilities.
Three options for arranging the basement input: a - steel; b - polyethylene with free bending of the pipe; in - polyethylene with tap ZN. Designations: 1 - section made of steel pipe; 2 - transition from steel pipe to polyethylene; 3 - polyethylene pipe; 4 - a protective case; 5 - flexible polyethylene case; 6 - tap with ZN
Ground bends are produced in a factory way according to SNiP 42-103-2003. Part sizes may vary depending on installation conditions.
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Transition from polyethylene to steel
Protection of the steel piece of input
Metal sleeve in the wall
Ball valve to shut off
Two types of basement must not be confused - for liquefied and moist or dried gas. If used improperly, the fuel supply may be interrupted during frosts.
We also recommend that you read the article on how far to install the gas tank. More details - follow the link.
Gas equipment connection
After the tank is installed on the stove, the devices are installed, without which gas cannot be supplied:
- electrochemical corrosion protection (anode-cathode);
- bellows expansion joint to ensure linear expansion and contraction during ground movement;
- condensate collector to prevent ice plugs in frosty times (mounted at the lowest point of the gas pipeline);
- ground loop and lightning protection system.
On the neck panel that protrudes above the ground, all valves and gates must be in good condition. This applies to safety and filling valves, pressure gauges with valves, adjusting gears, percentage valves, etc.
From the tank to the basement, a gas pipeline is constructed from HDPE. Low-pressure polyethylene was chosen as a material for pipes for good reason: it is strong, flexible, does not enter into a chemical reaction with fuel, easily tolerates soil pressure, and has a long service life.
After laying the gas pipeline, it is covered with a layer of sand of at least 20 cm, over which a signal bright yellow tape with a prohibition inscription is pulled. This is necessary so that in the process of subsequent land work not to damage the highway
Unlike the external gas pipeline, the internal one is assembled from steel pipes.They are interconnected by detachable connections and left open to be able to repair or connect additional equipment.
When installing a turnkey gas tank, the internal connection of stoves or boilers is most often not taken into account, except in the most expensive service package. This question is negotiated separately.
Commissioning and backfilling
Commissioning is carried out before backfilling in order to correct possible errors, tighten connections, and provide additional protection for the gas pipeline at the joints.
First, they pressurize and purge the tank and pipes using pneumatic equipment under a pressure of 50 kg / h, after which leakage is monitored. If everything is normal, the tank is filled with gas and all connections are checked once again in order to detect leakage.
Installers check the condition of valves at the inlet and outlet, check and adjust the pressure in the system at the control points - at the outlet of the regulator and at the inlet to consumers
All data is recorded in the commissioning log, mounted gas sensors (optional), thermal shut-off valve. And only after the completion of commissioning is completed do they fill the tank with sand.
If the connection package includes the installation of internal equipment, you can immediately check the operation of the gas boiler, stove, fireplace, etc. For installation work, as well as for all devices, a guarantee is given.
Gas supply service agreement
After-sales service and refueling of the autonomous gas station are mandatory items, therefore, a contract for further maintenance is concluded either with the organization that installed the gas tank or with another company (for example, which is closer or offers lower prices for refueling).
Refuelers are called up as the tank is emptied, about 1-2 times a year, but with active gas consumption, the intervals between refueling can be reduced
Payment for gas is made in cash at the time of service (according to the meter installed on the gas carrier) or by bank transfer.
System maintenance is divided into scheduled, unscheduled (repair) and emergency (emergency). The planned includes an inspection of the equipment, checking the operation of all devices, determining the gas pressure, and, if necessary, tuning.
According to the schedule, the safety valve is replaced. The tank is checked for integrity with a frequency of 4-5 years.
If there are doubts whether it is worth installing a gas tank on a site, we suggest reading an article where we compared the installation of a gas tank and main gas. Read more here.
You can find out how gas tanks look and work, how they are installed and refilled from the following videos shot by professional installers.
About the nuances of using liquefied gas and autonomous gasification:
It is intelligible about installation and fittings:
Example of incorrect installation of a gas tank:
The use of gas in domestic conditions makes life in the country comfortable, but subject to absolute safety. A professional installation of equipment by a company that has a license and extensive experience is the only option for the correct and legal connection of a gas tank. Turnkey installation in this case looks practical and expedient.
If you have experience installing a turnkey gas tank, share it with our readers. Leave comments in the block under the article. There you can ask questions of interest on the topic of the article.