The most common basement of the gas pipeline received in the countryside. The thing is that when connecting residential facilities located outside the city limits to a gas heating system, you have to lay a pipe underground and bring it to the surface near the house. Since the conclusion is most often carried out precisely on the first floor (it is on it most often the boiler room is located), the method was called basement.
General information and purpose of this type of gas pipeline
A very important point that must always be observed is the laying of underground utilities. These include not only the gas pipeline, but also electric cables, sewers , etc. They are united by the fact that all of them must be mounted in strict accordance with the GOST rules, which regulates the distance between these types of systems.
The purpose of the basement of the gas pipeline is to transfer the underground communication to the aboveground, close to the suburban residential facility. The gas inlet itself is a monolithic type connection between pipes, which are designed to ensure the very transition of communication from underground to surface.
Transition moments must be connected by metal parts that will protect vulnerabilities from mechanical damage, as well as from undercooling. In addition, the shell or case, as it is also called, should be closed with plugs.
The basement of the gas pipeline can be located in any part of the building structure.
L-shaped input
To date, there are three main types of input systems in the house. The first of them was named L-shaped.
The main feature of the connection by this method is that the metal part of the pipe is completely protected from moisture, and in its design it has a steel-polyethylene connection. This becomes a huge advantage in areas where in the cold season, temperatures can drop below -20 degrees Celsius. This becomes possible precisely because the second part of the pipe is frost-resistant and practically does not give in to freezing. This property allowed the use of the L-shaped type of connection in the coldest regions.
Direct connection type
The second type of base entry of the gas pipeline is direct. Its design feature was that the entire pipe is made of special grades of polyethylene, which makes it possible for the pipeline to have a free bend. This system is also mounted in a flexible case, so as not to interfere with the bends of the pipe. The location of this design feature is at the bottom of the network. But the connection, in turn, is located in the upper part and has a steel shell.
The basement device for a gas pipeline of this type has some limitations. It can only be operated in those regions of the country where the temperature in the cold season will not fall below -15 degrees Celsius. Most often, such systems use low-pressure methane as natural gas.
I-type system connection type
If we consider the third type of connection in general terms, then it resembles a direct type of connection, however, it has the addition of a bellows and a tap. The pipeline itself is made of steel and polyethylene. Networks are connected using a welding machine. The transition of this type is most often located in the vertical part of the pipeline.
Distinctive features of this compound are that there is a fairly high level of thermal insulation, as well as resistance to mechanical stress. These qualities are ensured through the use of a steel insulated case. You can use the I-shaped type of connection in any weather conditions. Connection to the main line is carried out by using an electric welded outlet. This type of system can be used for pumping natural gas at any pressure.
Why exactly the basement input?
The manufacture of the basement of the gas pipeline according to the drawing is a unique project. When compiling and preparing it, it is possible to take into account all individual features, which allows you to make the necessary design changes. This is one of the main advantages, since it is this feature that allows you to adjust the gas pipeline system to any operating conditions. In addition, this approach allows you to solve most of the problems that would arise when connecting to any other type of network.
The advantages of this type of network input
One of the advantages is that finishing work can be put on the back burner. And this means that you will have to spend less material resources on laying communication. Another important plus, which also reduces the amount of work and the cost of the project, is the absence of the need for radiographic monitoring. Therefore, there is no need for an enlightenment, since there are no welded joints in the structure.
Due to the use of cases for all pipes during the basement entry, they are perfectly insulated from moisture ingress. This significantly increases the life of the equipment. There is also no need for IP, since alignment and high-quality electrical insulation are provided without it.
Another plus of the insulated case is that it provides additional thermal insulation. This allows you to use the basement method of entering the pipeline in almost all climatic conditions. The system can be installed in areas where increased seismic activity is observed. For this, the pipes have all the necessary characteristics and design that can withstand high mechanical loads.
Since polyethylene is used at the bottom of the pipeline to connect the pipes, this makes it possible to use the system in heaving soil. This material has an average density, which is quite enough for the normal operation of the pipeline in clay.
Base entry of the gas pipeline 57 DU
The characteristics of this input include the fact that it is made using the steel-polyethylene connection. This type of system has a two-layer outer coating. The basis for it was extruded polyethylene.
All gas pipelines also have such a thing as normal. The basement of the gas pipeline also has its own indicator of this characteristic. All numerical values of this parameter are recorded in an album consisting of two parts.
The first part describes the normal for units and parts belonging to urban gas pipelines. The second part describes the indicators for gas control points (hydraulic fracturing).
If we talk about the price of the basement of the gas pipeline, then we won’t get a clear price in advance. Each project is individual, and the owners themselves choose the material for laying communication. For example, a pipe with the smallest parameters made of steel or polyethylene will cost 51 rubles. The length of the object is 445 mm. The largest pipe in all dimensions, including a length of 930 mm, will cost 6325 rubles apiece.