Calculation of the pipeline diameter: Example of calculation and nuances gas network installation

Today, the cheapest and most available fuel is gas. However, the path to the house lead-explosive fuel, must be laid with extreme caution and comply with all standards. Therefore, owners of country houses should clearly know how to calculate the diameter of the pipeline and what to pay attention during installation.

In the present article we described in detail how piping and connecting them to the house. We will tell you what documents are required to obtain and how to check the installation of the system. The information offered by us for the inspection, based on the building specifications.

Why gasify a house?

The main reason is the low cost and convenience. The difficult economic situation in the country forced the owners of private houses to look for the most affordable option of heating the building. Therefore it is not surprising that over time, the owners of cottages come to the conclusion that it is necessary gasify construction.

Yes, of course, it is possible to heat a house with the help of electricity. But this solution is rather expensive, especially if you need to heat a few hundred square meters. And the whims of nature in the form of a strong wind or storm can break the cable and have not known how many sit without heat, food and hot water.

Another alternative gas is an old and proven method - heating using a fireplace or brick furnace. The main drawback of this solution is that the storage of wood or coal will lead to the appearance of the mud.

In addition, the need to allocate additional square footage for their storage. Therefore, natural gas is not yet one year will occupy a leading position, and the question pipeline design a very long time will be relevant for the connection of the private sector.

The main varieties of gas pipelines

There are three types of roads. First - a low-pressure gas pipeline. For this system, the maximum pressure of 5 kPa. Most often this type is laid in small towns. It is also used for water supply of medical facilities, residential buildings, nurseries and public buildings.

For the second variant - medium pressure line - the fuel flow can be supplied with a force up to 0.3 MPa. Scope of this type are limited to providing gas quarterly and regional regulatory stations.

As for the high-pressure line, it is intended to supply fuel to the large industrial enterprises. For owners of private homes such a decision is irrelevant. Indeed, in house gas supplied by a pipe in which the pressure is less than 5 kPa mark.

Details of the pressure parameters and classification of gas pipeline networks in its value is written article, With the content which we encourage you to read.

Norms and standards piping

In residential buildings the gas enters through the input coming from the fuel dispensing stations. As a rule, they are installed on the ground floor and then laid on a staircase. The pipe, which is fed to a residential building, compulsorily made seamless method, and its wall thickness is not less than 3.5 mm.

at traverse line to a private home it should be located on the water pipes and heating system at least 15 cm. In the case of telephone or electrical cables, this value increases up to half a meter.

The pipeline preferably is made of steel. Therefore, to prevent corrosion of the pipes, it is covered with a insulating material. Because of this design is not in contact with moist soil.

Methods of assembly and their features

Pipeline can be laid by various methods. This is an underground, above-ground or underwater installation. In buildings network gasket may be performed implicitly or open.

Each species has its advantages and disadvantages. Therefore, before to give preference to any of the species, it is necessary to understand in detail all its features.

Advantages and disadvantages of the method of underground

More recently, the installation of the gas pipeline mainly used underground method. In this case, the pipes are laid in a pre-dug trench. And their depth should exactly match the value specified in the project. Today, such a solution is used less and less.

The drop in demand due to the high cost of this type of gasket. Besides digging holes where pipes will be laid, it will take quite some time. Currently, engineers prefer using trenchless technology. Its peculiarity lies in the use of equipment which can perform directional drilling.

Due to this laying the cost is reduced three times, and the time required for the organization of lines, reduced at least twice.

underground method drilling using horizontal directional drilling equipment It eliminates the need to restore green spaces. Therefore, such a decision can be called the most environmentally friendly. Installation of this method is the drilling of a pilot hole, which subsequently is expanded to the required dimensions.

Next wall reinforced with a special solution. To protect the pipeline from the underground water streams and excessive mechanical stress, it is placed in a protective case. The final step is to broach the pipe through the hole.

Outside the organization of the gas pipeline

The external method is used more often. In this case, the pipeline is usually stretched across the yard of the cottage. In this case, the design should be protected from unauthorized persons. For this purpose, the tube located at a considerable height.

Particular attention should be paid to fix. The fasteners should be as robust and reliable as to minimize the risk of falling, and as a result, damage to the gas pipe.

Ground and above-ground laying

Compared with the ground by underground mining installation will cost almost half the price. But in this case it is necessary to pay special attention to protecting the structure from environmental influences and mechanical damage.

For example, the pipe must be sealed, so that it does not fall precipitation and had no noticeable temperature swings. Moreover, the security type is selected depending on the climatic conditions of the region.

To prevent unauthorized connections to the highway, you need to take care of protection. After all, due to the fact that the pipe is on special supports on the ground, it can be seamlessly accessed by third parties. Therefore, in contrast to the underground installation this is a less reliable.

Which method of installation of the gas pipeline is better?

Give preference to one or another solution is necessary, depending on the climate of the region where the work will be carried out, building density and soil characteristics. Accordingly, a clear answer is simply no.

To determine the order which method of installation to choose, consider the following recommendations:

1. If the soil on site is characterized by high corrosiveness, the most appropriate solution is to pipeline installation ground method.
2. At the intersection of the road duct is economically advantageous combined version. That is, in the area avtopolotna pipe must be located above the ground and on a suburban area - be laid in trenches.
3. In the case of pipeline through adjacent portions is recommended to select Ground (open) method.
4. With the passage of the gas pipeline branch on a site with an extensive system of transmission lines sensible solution would be the installation of a hidden line.

laying process directly affects the material from which the pipe is to be manufactured. The issue related to the fact, some pipes and fittings used in a particular case will be considered further.

What documents are needed?

Before we proceed directly to the installation have to collect the necessary papers. To do this as quickly as possible, it is necessary to prepare a passport immediately, as well as documentation, which confirms ownership of land and house located on it.

The next step is to apply to the appropriate service. It expresses the desire to gasify a house. Employees will be given a form that lists all specifications.

According to the project carried out the installation of the gas network. Sometimes the pipes are laid through areas of the neighbors. In this case it is necessary to request their written permission to carry out such work.

In addition to the papers mentioned above, you will also need to obtain the following documents:

• I act of equipment running on gas in the operation;
• an agreement on the preparation of technical documentation and carrying out the work;
• authorization for the supply of natural gas and payment for this service;
• document about the hardware installation and gasification of the house.

Also need a chimney inspection. After that experts will be given the act. The last document - permission for the gasification of the private house - given the local architectural and planning company.

How to calculate the diameter of the pipeline?

In drafting a special attention is paid to the diameter of the pipe. Doing this will be a designer, using complex formulas or a program.

In order not to bother with a variety of formulas, a good choice would be to use one of the specialized programs. The benefit of such software on the Internet is full. Use calculators easier than ever - just need to fill in the appropriate information.

Standard rates for private household connection to the main gas listed here. Owners of suburban areas worth knowing "what it would cost" gasification.

Selection pipes and fasteners

Since the highway with the blue fuel is an object of increased danger, all the fittings used must have the necessary quality certificates. Otherwise, the Commission, conducting the final test, will not allow to house such pipes was gasified.

Nuances material selection

Pipe material is selected depending on the method of laying the pipeline. The greatest demand for polyethylene and steel products. The main advantage of the latter variety is universality. After the steel pipe can be used for both underground and to the facing sheet. But such a solution would be more expensive.

With regard to the fixing elements, the need for mounting corners, couplings, tees, crosses, plugs and adapters. Typically, they are made of iron, steel, or polyethylene.

Also, do not delay the installation of the counter. After all, it will significantly reduce costs.

The advantages of polyethylene pipes

First of all, such a reinforcement does not corrode over time. Therefore, it allows you to save on maintenance and repair of the pipeline. Due to the special production technology plastic products have a completely smooth inner surface. As a result, the fuel flow rate is not slowed down in any way.

One of the main advantages of plastic pipes is their safety. They no stray currents will, because of which the gas can explode. So there is no need to use expensive special case in the case of underground installation.

If we compare the weight of a steel pipe and a polymer, the latter is easier to view in as much as 7 times. This property allows us to significantly reduce the cost of construction, because it does not need to involve the technique of having improved load-carrying capacity.

Pipes made of polyethylene, thanks to its flexibility, earned the respect of professionals. Due to this assembly method of horizontal directional drilling will not cause any difficulties or problems. This decision is especially important when the well has an irregular shape or when you create any obstacles are detected.

When the polymer is to abandon?

In some cases, plastic products will be a bad choice. By limiting conditions include a situation where the ground temperature can drop below -15 degrees in the winter season.

The use of polymer fittings are also prohibited in the following situations:

• through conduit will deliver the liquefied hydrocarbon;
• He was chosen the open method of installation;
• if the gas pipeline passes over any obstacles (railroad and motor road).

Once all the necessary items were purchased, and the documents collected, it is possible to deal with the peculiarities of laying line with the blue fuel.

The order of the gas pipeline

Contrary to what the installation pipes should deal exclusively with professionals who have the necessary qualifications, every owner of a private house should become thoroughly acquainted with the order of work. This will avoid the trouble and the emergence of unplanned financial expenses.

Installation of the riser and training facilities

If a private home is gasified for heating organization, you need to take care of the arrangement of the room. Room with all the equipment shall be separate and have a pretty good ventilation. After all, natural gas is not only explosive, but also toxic to the human body.

As for dimensions, the ceiling height in the room should be no less than 2.2 m. For the kitchen, where there is a stove with two burners, will be enough space to 8 m^2, and for models with four - 15 m².

If the heating of the house will be using equipment larger than 30 kW, the boiler must be brought outside the house and be a stand-alone building.

Gas is fed into the house via the input device, presenting an opening above the foundation. It is equipped with a special sheath, through which the pipe. One end is connected to the riser and a second part inside the gas supply system.

Mounting is carried out exactly vertical riser construction and must be removed from the wall by a distance not less than 15 cm. Secure the fixture is possible by means of special hooks.

Subtleties of buildings internal system

During the installation of the pipeline in the wall all its parts must be passed through the sleeve. In this case, the entire structure must be covered with oil paint. Free space that is present between the tube and the sleeve is filled using tarred tow and bitumen.

Each of the nodes is going to the bottom, and only hardware pre-preparation components is carried out at height. If the pipe diameter does not exceed 4 cm, they can be fastened by means of clamps or hooks. For everyone else, it is recommended to use brackets or suspension.

Welding, assembly and admission rules

The specifics of independent gas heating company introduces next articleDetail parsing options for heating units. Independent craftsmen useful boiler piping circuitListed in the recommended material contact.

All components of the conduit are interconnected by welding. The seam should be of high quality and reliable. To achieve this, it is necessary to align the previously clean end of the tube and about 1 cm on each side.

With regard to the assembly of threaded joints, then it needs to use a special procedure. First joint processed by whitewash. The next step consists in winding the long-fiber flax or a special tape. Only then can we tighten the screw connection.

Once the wizard will finish the work in the house should come to the commission. she held pressure testing of the pipeline and checking the quality of the installation. And necessarily the owner instructed on the rules of use of the gas pipeline. Also, the staff will tell how to use the equipment that consumes natural gas.

Conclusions and useful videos on the topic

Video # 1. All of the private home of gasification:

Video # 2. Basic installation steps:

Laying of gas pipeline to a private home - it is time-consuming and responsible process. After all, the quality of the work depends perfection of supply and security of the residents. Therefore it is better to entrust the execution of calculations and self assembly of highly qualified and experienced staff.

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