Do-it-yourself tie-in into a gas pipe under pressure without welding: video. Do-it-yourself tie-in into a gas pipe under pressure without welding: video Installation services for heating water supply

It is impossible to join a gas pipeline and a gas-consuming facility that are newly built and operating, as well as those that have not been accepted by a special commission, and it is also prohibited. In order to connect such facilities, an act of acceptance into operation is required, in accordance with the instructions approved by the head of the engineering department of the gas enterprise.

You can join the gas pipeline system, which is in operation, only when gas is released into gas channels or objects. And at the end of the gas wire that is connected, it is necessary to install a barrier cover. If there is a special shut-off device at the end of the gas pipeline system, then a barrier cover must be installed after it. Even at the preparatory stage, before the connection process, the gas supply channels to the premises must be disconnected from the internal gas pipeline.

For the commissioning of a gas pipeline for industrial production or for agricultural or municipal enterprises, it is necessary to inform the gas service of the city about the connection of the gas system of enterprises to the city distribution source to launch the gas substance in the network of enterprises. Also inform the district branch of the city gas service by submitting an appropriate application from the enterprise.

Then, when the enterprise will receive gas from the gas main, its gas pipeline must be connected to the gas main on the basis of an act on the acceptance of the gas system. Work on cutting into the gas main is carried out by a special gas service.

All gas pipeline structures and gas facilities, before connecting them, are subjected to external inspection and control pressure tested. Pressure testing is carried out with air or inert gas. The process of pressure testing of external gas pipelines of any pressure must be carried out at a pressure of 0.02 MPa. The pressure indicator may drop, but not more than 10 daPa per hour.

The control process of pressure testing of internal gas pipelines of industrial or agricultural enterprises, an enterprise that serves the population and has production tasks, instruments and devices of the gas pipeline system must be performed at a pressure of 0.01 MPa. But the pressure indicator can only fall by no more than 60 daPa per hour.

Under a pressure of 500 daPa per hour, the internal gas pipeline system and equipment of the enterprise, which serves the population and has non-production tasks, residential buildings and public buildings, is pressurized. The pressure indicator when falling is not more than 20 daPa for five minutes.

The tank with liquefied gas, the gas pipeline system of the group cylinder installation are tested by the control process at a pressure of 0.3 MPa in an hourly period of time.

As a result, the tests carried out can be considered positively completed, provided there are no moments when the pressure drops and there are no leaks. This is determined using a pressure gauge and a soap emulsion.

The results obtained are drawn up in an act and recorded in the order for the performance of hazardous gas work. The air pressure indicators in the gas pipeline system that is connected must be maintained until the very initial stage of the connection process and gas start-up.

In the case when the gas pipelines that passed the inspection and those that were tested by the control pressure indicators were not filled with gas, then in the conditions of the restoration of work on the launch of gas, they must be inspected and pressure tested again.

Gas tapping and welding work on gas pipeline structures that operate in normal mode, if other gas systems are connected to them, must be carried out under gas pressure within 40150 daPa. These indicators are checked throughout the entire time period while the work is being done. In the event that the pressure begins to fall below 40 or rise above 150, plunging and welding should be stopped. It is necessary to control the pressure indicators in the required area using the installed pressure gauge.

The moment of decrease in pressure indicators in the gas pipeline system under the conditions of plunging occurs by a special shut-off device or a regulator of indicators. If special devices are used that ensure complete safety and performance of processes at a qualitative level, it is allowed to connect without lowering the pressure indicators. The method by which the gas pipeline will be connected to the one that is already in operation is established by the enterprise.

The procedure for inserting gas wires with the help of gas is carried out in accordance with the instructions developed by the gas facilities enterprises. The presence of persons outside the process, smoking and open fire in the area of ​​​​the work on the plunge is prohibited.

Various pits on the ground in the process of plunging work should be protected near the work area by posting warning signs: No Passing!, No Smoking! and Attention! Gas! Be careful!.

It is also prohibited to release gas into a gas system if it has not been checked for integrity through inspection and test procedures, in addition, for the serviceability of gas appliances and the presence of mandatory barrier covers. The launch of gas into special equipment for residential premises is carried out before the residents of the house were settled in it.

When gas is started, gas pipeline structures must be purged until all air is forced out. The completion of the purge can be determined by analysis or by incineration of the samples that are taken. In this case, oxygen should not be contained in the gas in more than 1%, and the test specimen of the gas should burn without exhausts and fairly measuredly.

When the gas pipeline is blown, it is forbidden to spray a mixture of gas and air in the building, on stairwells, in chimneys and in the ventilation system. The building where gas consuming devices, gas pipelines, gas equipment are located should be regularly ventilated when starting a gas substance.

A mixture of gas and air should be released in the event of a gas pipeline being blown in a section that excludes the risks of its passage into the room, in addition, where the formation of a flame from any fire source is excluded.

At the first start-up of a gas resource, it is necessary to carefully monitor that it is supplied with pressure indicators that do not exceed those for which the gas pipeline system was calculated. At the time of launch and immediately after that, it is necessary to vigilantly monitor the gas supply system as a whole, in the case of laying underground, behind all objects, including a basement, a well, buildings that are located on an area within a radius of 15 meters from the gas pipeline gas source. Enhanced tracking is necessary in winter and spring, when the frozen soil mass above the gas pipeline structure can make it difficult for the gas to escape from underground. Do not forget that when gas leaks from a gas channel underground, it moves in the soil mass at a speed of up to 7 meters per hour.

The workflows on the subject of connecting a new gas pipeline to an already fully operational one should be carried out by specially trained people under the supervision of specialists in the gas industry.

Works on connection to the gas network are considered gas hazardous, which are carried out according to a scheme that has been approved in advance. For such work, assignments are made. At the preparatory stage of the workflow, a drawing of the connecting units is necessarily carried out, a method for connecting work is determined, the procedure for lowering the pressure indicators in the gas pipeline is calculated, of course, where it is required, and they are provided in a stable state for the entire period of connection. The necessary materials, protective equipment, life-saving devices, first aid equipment are also calculated. In addition, barrier covers and valves on the gas pipeline that is connected must be closed.

Connection methods

So, there are several ways to connect a new gas pipeline to an existing one, such as:

1. Connect with gas (low pressure readings within 40150);

2. Connect under high and medium pressure without reducing it, using special devices;

3. Connect the pipes, disconnecting them and freeing them from gas.

When performing work, there is an option to turn off the gas in place using a wooden disk, a piece of burlap, clay mass, a rubber chamber.

Connecting a new gas pipeline in a way when you need to turn off the current one, using a rubber chamber, is acceptable for a gas pipeline that has a diameter of up to 60 cm. The pressure indicator must be reduced to 150. First you need to check the hand pump for serviceability and chamber tightness properties. It is necessary to install a certain type of pressure gauges and control the pressure.

The procedure is as follows:

1. With the help of an autogen, a hole is cut in the gas pipeline, which works. The hole diameter is about 10 cm.

3. It is necessary to introduce the chamber through the hole made into the channel and fill it with air mass, while ensuring strong contact with the channel walls.

4. A section that is turned off is blown through the hole.

5. Then, it is necessary to crash with a new gas pipeline having a barrier cover.

6. Finally, the chamber must be removed from the working wire, the hole must be sealed, the pressure must be restored, and the tightness properties of the connecting section must be checked.

Attach with a visor

1. The area where it will be connected is cleared of insulating residues.

2. Mark with chalk and cut the end of the pipe together with the steel barrier cap. Then a visor is cut in the extension to a size that ensures the unhindered removal of the disk that is cut out (walls).

3. On the gas pipeline, it is necessary to mark the size of the diameter and its circumference with a small one, which is equal to the diameter of the product that is connected. In the center, weld a rod with a diameter of about 8 mm and a length of about 20 cm. This is necessary in order to remove a piece of pipe that is cut out.

4. Cut out the disc along the marked circle, leaving a small piece of about 5 mm in order to hold the disc. You need to cut down.

5. Put out the gas, cover the hole with a clay mixture along the trajectory of the cutting tool. If the putty dries, then smear again with the already diluted clay mass.

6. The flame is extinguished, the cutting area is cooled down.

8. It is required to insert a wooden disc with a seal into the expansion through the hole. Adjust the canopy to the extension and to the gas structure.

9. Remove the wooden product by knocking out the indented surface of the wall with a hammer, remove it with a rod and firmly press the visor with asbestos. Leakage must be eliminated by applying asbestos.

10. Fix the visor with a wire, the diameter of which is about 3 mm.

11. Blow out the connection well, removing all the mixture.

12. Weld the visor after cleaning it.

13. Adjust the pipes, install a steel gasket on top of the visor and scald with an overlap. The padding is 20 cm larger.

14. Before installation, the gasket is heated with a gas appliance, make a bend with a sledgehammer and fit it to the products so that it overlaps them.

15. Tap the joints, clean and check under working pressure using a soap emulsion. The area where the connection has occurred is cleaned and covered.

16. Install the control tube, fill the ditch.

End connection

1. After cleaning the gas pipe, mark with chalk and cut out the canopy, maintaining a gap of about 50 cm from the steel barrier cover. The size of the visor should not interfere with the installation of the disc. Cut out the disk, cover the gap with a clay mixture. Cool the cutting area.

2. Separate the visor and install a disk inside the gas pipeline, which, in turn, is fixed with a wedge and smeared with clay mass. If the diameter of the product is less than 15 cm, then you need to put a cork in the pipe using bags and clay. Remove the chamfer and fit under the pipe.

3. Mark and cut the ends of both structures and barrier caps. Remove bevels.

4. Make a markup and cut out the connecting node. The length of the node can be determined by breaking both gas pipelines, taking into account allowances for fitting. Install the assembly by grabbing it and weld it at the docking points.

5. Having cooled the disk, take it out and apply a visor using sheet asbestos. Secure it with steel wire, the diameter of which is about 3 mm. Blow out the connected area with gas.

6. Weld the visor, cleaning the chamfer from dirt. Fit, install and weld the steel spacer.

7. It is allowed to use a paste to cover the cracks.

Connecting with a slide-on product

1. Clean the connecting sections from insulating residues.

2. Prepare a pipe for connection (slip-on) with a diameter that is larger than the outer diameter of the gas pipeline to be connected by about 2 cm.

3. Prepare an external extension about 15 cm long, the diameter of which is 1.5 cm larger than the external parameter of the connection pipe. Install the extension, align and attach to the active wire. The axes must match. Having adjusted the expansion, weld.

4. Cut off the barrier cap at the end of the gas line and push on the pipe. Weld special ones to the ends of the pipes, the diameter parameter of which is 3 mm less than the outer parameter of the pipes and expansion.

5. Cut out the wall through the extension, leaving a bridge of about 4 mm. Remove the wall using a pre-welded rod.

6. Extinguish the gas with clay.

7. Push the pipe. At one end, it rests against the wall of the gas pipeline network, which is in operation, and at the other, it moves at least 10 cm onto the product.

8. Cut the window with a hammer and remove it by pushing it into the gas system as far as it will go. Seal the gap between the walls with asbestos cord until the gas stops flowing.

9. Purge with gas until mixtures are completely gone. Heat the ends of the products with a burner and roll them, then overlap them.

Then all procedures are performed in the same way. The walls are removed and the gaps are sealed with an asbestos cord in a gas mask.

Connection with a coupling is carried out in the following order:

1. Clean the connection area. Prepare a coupling, the outer diameter of which should be 2.5 cm larger than the outer parameter of the connection pipes. The length of the product can be determined by the gap between the ends of the products and add 20 cm. The coupling is installed on the ends of the connection pipes.

2. Trim the ends of the products together with the barrier caps. Extinguish the gas with a clay mixture. Weld the rings on the ends. At the end of the pipe and weld both parts of it.

3. Check the coupling by sliding it over the end of the second pipe. Separate the cut ends and barrier caps, followed by pushing the sleeve over the second pipe. Both ends must be overlapped by a coupling of at least 10 cm.

4. Strengthen the gaps between the walls of the products with asbestos cord. It is necessary to seal until the gas stops coming out. After blowing through the pipes, heat the sides of the coupling with a gas appliance and hammer with a hammer until they are completely joined to the pipes. Weld the ends of the coupling.

It is possible to connect by means of a bypass for the period of the installation process regarding the shut-off equipment to the existing gas channel. In addition, under switching conditions, the available continuous gas flow inputs. The diameter parameter of the bypass product is equal to one fifth of the diameter of the products that are connected.

The process is carried out in this order :

1. Make a bypass product, the length of which is equal to the length of the section that is planned to be turned off and add 2 meters to it. Prepare two extensions 5 cm long, their inner diameter should be 1.5 cm larger than the outer diameter parameter of the bypass product.

2. Observing a gap of one meter from the border of the section that is being turned off, mark a circle with a diameter equal to the internal indicator on top of the pipe with chalk. In the center of the circle, weld a rod 0.8 cm long and 20 cm long. Weld extensions to it. Check the installation of the bypass in the extensions.

3. Inside the extensions, cut out the disks in the walls according to the marks, while leaving a 3 mm area. Extinguish the gas with a clay mixture.

4. Knock out the discs and remove them with a rod. Install a bypass from inside the extensions. Docking places to seal with a cord. Attach it to the expansion by means of welding equipment at 3 points.

5. On the marking sections of the pipes, cut out a pair of peaks through a gap of 10 cm from the bypass product. After cooling, separate them. Install the barrier cover through the hole from the inside.

6. After completing the work, remove the barriers, weld the visors, put the disk on the hole.

7. Test seam places, isolate the working area.

Excavation preparatory work and acceptance, insulation measures in the cutting areas and backfilling of the excavations are carried out by the company that built and connected the gas system. Before connecting, the electrochemical means must be switched off. Connecting work under the influence of gas from inside the room is prohibited.

After all the work carried out, the density of the seams is checked with a special device or with an emulsion using pressure. It is also worth bypassing the gas main, marking the work done in the order, writing everything down in the passport. Attach the outfit and scheme to the rest of the documents and save them together.

To open the flange on the connection, devices are used, for example, a copper wedge. It is suitable for products with a small diameter.

If the diameter is more than 30 cm and it is required to open the flange, then fasteners are welded for mounting a jack between them. Do not use a hydraulic jack. It is necessary to install gaskets made of wood in order to prevent it from falling. And it is better to fix it on the gas pipeline. During the installation of barrier covers, it is necessary to check the dimensions of the covers and whether they correspond to each other, it is necessary to prepare gaskets, lubricate the bolts.

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Two ways to connect your home to gas

Can I connect to gas on my own? How is a tie-in into a gas pipe carried out?

These questions are the most “terrible” for residents of private sectors, summer cottages and the “old fund”. This process is complex, multi-stage and expensive. Can it be made simpler or cheaper?

The scheme of connecting the gas pipeline to the house using gas cylinders.

There are two ways to crash into a gas main. One of them is legal, the second often leads to the next world. No, we don't intimidate. It’s just that gas is a dangerous thing, and it’s not in vain that the state is trying so hard to complicate the process of issuing it. However, there are still "craftsmen" who go against the system. Sometimes this ends in success and people even “negotiate” with the gas company in order to seal up their “creativity” and install meters. This can be called luck, because often such experiments end tragically. We especially do not recommend dealing with gas problems on your own in apartment buildings.

We understand that our admonitions will not be valid for those who already have the intention of experimenting with their lives. Therefore, nevertheless, we will give some practical recommendations to risky comrades.

Remember that when crashing into a pipe, at least safety precautions should be observed.

Way for "bad guys"

Arbitrary tapping into the gas system is currently prohibited, as it is extremely dangerous.

Brave men! If you are so severe that you are ready to take the risk of tapping into a gas pipe without the participation of the state in this complex matter, at least learn the safety rules.

For starters, such "secret" information. Every pipe has a valve. This valve in the case of a gas pipe is responsible for supplying gas. So, it should be shut off so that the gas supply is not carried out while you are tie-in. At the same time, you should try to make sure that no one else accidentally opens the same valve.

Gas workers check the leak in the old simple way - with a match. If the gas does not go, then everything is fine. If it goes, then everything is bad and you can get at least a burn. Prepare a fire extinguisher.

If you have been thinking about the tie-in process for a long time, then you probably stocked up with pipes, a welder and additional parts in advance: tees, a valve, etc. Most likely, you are an experienced welder and know how to cut properly. Yes, the distance between the pipes must be at least 50 cm. Usually, soldering points are checked in the “old-fashioned” way - with soap. Any foaming agent will do. After you have welded the joints, apply a generous layer of foam: if the bubbles show signs of “life” after turning on the gas, that is, burst and swell, you welded very poorly. Turn off the valve and cook again.

What threatens for a willful tie-in into the gas system, except for a possible sudden death?

It all depends on when it is discovered. If you listen to the news, you know that one such guy is already being treated forcibly. He crashed into a pipe under pressure and cut off the valve with a grinder. Neighbors in horror called “where they should” ... More cautious gas thieves live in clover indefinitely, but sooner or later there are still “good” neighbors who will definitely “hit” you “where they should”

What will happen then? Strong guys from Gazprom or another gas service and the police will come. And that's where the problems begin. They will ask various unpleasant questions like: “What kind of pipe do you have? Where? Do you have permission?" you can answer or remain silent, but they will issue you as expected: you will first have to pay for the stolen gas, then a fine, then drive to testify in places not so remote. The next step will be the imposition of criminal liability up to the deadline. It already depends on who and how badly you did with your illegal tie-in into the pipe. Yes, by the way, the pipe will probably be cut off, so that it would be disrespectful ...

In general, if you like unjustified risk and extreme sports, then please connect to the gas using "pirate" methods. If you don't like it, be patient and save money. Big money.

Relatively fair way to connect gas

So, you live in the XXI century and at the same time you have no gas in your house. What to do? Check if the neighbors have gas... If they don't have it, then check if the neighbors of their neighbors have a gas pipe. If no one has gas, are you sure you don't live in the 17th century??? Jokes aside, but in our country, it turns out, there are a lot of towns and villages that are still not connected to the gas pipeline.

Scheme-example of autonomous gasification of a house.

In order to legally conduct gas to the entire settlement, you need to start with the creation of a founding organization. The same should be done by horticultural cooperatives. The organization must be non-profit in nature and based on the needs of the owners of houses in this locality or partnership. Then, applications of the established form and a package of documents that are required in such cases are submitted to the technical department of the regional gas economy. The list of documents will be provided to you in the office of the technical department. Let an authorized representative of the created legal entity do this. Where to go, you will be prompted by the gas service. If we are talking about the Moscow region, this is in charge of the State Unitary Enterprise MO Mosoblgaz. You can also turn to an intermediary company, but you will have to pay for such services ... Documents are often considered for a long time, so you should constantly “remind yourself” through phone calls and additional statements.

If you live in a place where there is gas and a pipe is literally nearby, everything is much simpler. However, not as much as you might think. When buying a house, people often perceive with great hope the information that, they say, "gas on the site" or, even worse, "gas on the neighboring plot." Believe me, this is a bluff of sellers. Be sure to check whether the neighbors will agree to your tie-in or to the fact that you will pull the gas pipe through their rightful area. Ask whose gas pipe and who owns it. Talk to him. Often, neighbors do not quite adequately respond to the joyful intention to tear their entire yard apart.

As practice shows, evil neighbors are capable of anything: cut pipes, bury holes, set dogs on fire, and so on. Only one thing can reconcile them with your insert - the amount of money, the “appetite” for which they may have different: from 20,000 rubles to 500,000 rubles. This is quite normal, because the neighbor spent money on bringing the pipe to himself. But in any case, the amount should be based on reasonable figures and not exceed the cost of direct gasification. You can try to let the pipes "bypass" from the main pipe, but this is more expensive. In addition, you will be laying a pipe through other sections, and this requires the consent of those neighbors. By the way, the price of a tie-in into a gas pipe located “underground” is significantly higher than a similar tie-in into an “air” pipe. It is understandable: different labor costs.

Regardless of whether you have agreed with your neighbor or not, the first thing you will have to do is go to Gorgaz and find out who is the boss in the house. That is, who is the owner of the pipe. After that, you need to start seeking a solution for gasification from the owner (at this point in the article it would be logical to insert a sound effect with the rustle of banknotes). After permission is received, you should go to the design organization and order the project (here again, the rustle of banknotes). After that, the installation organization dealing with gasification issues will get down to business. You, of course, pay for the work of gas workers and buy pipes and all other necessary building materials. It is best to contact the gas organization in the area.

Documents you will need

1. Passport, code.
2. Application certified by the head of the gas facilities.
3. A document confirming the right of private ownership of a house or apartment (a copy of the BTI registration certificate for a private house).
4. If there is no house yet, then the corresponding architectural design and building permit.
5. Full floor plan of the house in the presence of a house. If the house is more than 300 sq.m, a thermal calculation of the building will be required.
6. Permission for gasification of a private house or apartment in the APU (architectural and planning department).
7. Geodetic and topographic survey of the site with reference to gasified facilities and a private house on the site. It is carried out with the application of the design line of the gas pipeline, certified by the local gas service.
8. Situational plan of the site on a scale of 1:5000.
9. Written consent of neighbors to connect to the gas pipeline if it is located on their sites (as a rule, such permission is issued by Gorgaz, since most often it is he who owns the gas pipeline).
10. Documents for gas equipment installed in the house (permission to use the equipment on the territory of the place of residence, certificate of conformity of the equipment, as well as a contract for its maintenance).
11. Chimney inspection report.
12. All these documents must be on hand. You will receive a complete list from the organization that deals with these processes. It can be supplemented with a few more pieces of paper.

However, do not think that this is all! You will need many more. So, for example, you will have to ensure fire safety during installation, all “turning” moments of pipes, their connections, and so on will be examined.

Each region may have its own additional requirements. Certificates, technical documents, documents for payment of various services and fees - you will need to collect all this.

Another couple of very, very valuable and important tips. When you connect the gas, choose the largest pipe. So you will avoid problems with further gasification of your site. Just carefully choose the location of the future location of gas appliances. Sometimes it happens that after repair you want to move the stove to another place. You can’t do this: they will come and fine you!

Although, if everything is done correctly, the gasification process will not be so overly lengthy!

Gas has a responsible mission - to take care that we do not freeze and starve. Meanwhile, he himself does not come to visit, for example, like the wind or the sun, gas must be properly “invited”, a green corridor should be organized for him and reliable “transport” should be provided. Let's look at how to crash into a gas pipe according to the letter of the law and in a hooligan way - for those who like to tickle their nerves by breaking the rules.

Types of gas pipelines

A gas pipeline is a means for transporting and simultaneously storing gas. These designs may vary depending on what mission they are performing. For example, networks that ensure the transmission of blue fuel over long distances are naturally more powerful, the pressure in them is high. Because of this, it is dangerous to “experiment” with such systems, you can provoke trouble, moreover, concerning not only you, but also your neighbors. Let them better worry about how to make a tie-in into a gas pipe of this format by the relevant services that arrived at your request. From the pipes operating over long distances, like the vessels in the human circulatory system, small ones - called distribution pipes, in which the pressure is lower than in the main networks, depart. But it can also vary - from low to high. With such designs, you can already try to “make friends” on your own, however, you need to clearly know what and how to do, as well as observe safety measures.

Tapping into the highway, of course, is best left to professionals.

Insert Features

What is a notch? In professional terms, this is the connection of a new pipe to a working "relative" - ​​already transporting blue fuel. Often, systems are connected without shutting off gas, even trunk lines, but there are important nuances in this process. So let's look at how to crash into a pressurized gas pipe.

Work rules

Remember the basic rules for handling these systems:

• it is permissible to make a tie-in into a network with low pressure at pressure indicators not exceeding 80 mm of water column, but not lower than 20;
• connection to highways or networks with high / medium pressure is possible only after its level has been reduced to an acceptable level;
• if it is impossible to reduce the pressure, you will have to find special equipment that allows you to make a tie-in under unusual circumstances;
• work without pressure relief is allowed by law only to be carried out by relevant organizations that have permission for this type of activity (sometimes even receiving a special outfit);
• gas welding and cutting can be carried out in areas with a pressure of 40 to 150 kg / cm (moreover, this corridor must be observed throughout the entire process).

Masters working with the gas network must have a special permit. Before starting the process, make sure that the contractor has such a document

Insert types

You can connect a new network to a working system using the following technologies:

1. Cold tie-in, in which the main pipeline operates without changes (the volume of blue fuel in the structures and the supply pressure remain the same - working). According to this “scenario”, gas networks of new users are often connected to the main. Many craftsmen know how to crash into a gas pipe without welding, since this technology is relatively simple.
2. Welding, popularly called the "traditional way", is a reliable, time-tested technique, however, requiring certain qualifications and special access from the performers involved in the connection.

As for the methods of tie-in itself, they are divided into:

• reel, implying attachment to the end of a working system;
• tee, when the insert is made with the intersection of the axes of the networks.

Video: do-it-yourself connection to the gas system

Process description

Connection of metal systems

1. Surface cleaning. Remove from the place where you planned to make a frame, paint, debris, rust.
2. Markup. Determine where the connection will be, put the marks.
3. Making holes (with the coil method - 1, with the tee method - 2).
4. Well treatment. The cracks should be treated with clay, and it is recommended to start this process even during the cutting of the surface in order to minimize the risk of burning / igniting the leaked blue fuel. Ready holes should be closed as quickly as possible with a special (made of asbestos and clay) plug. The treated area must be cooled.
5. Installation of the disconnect device. When the metal has cooled, the plug can be opened to remove a fragment of the cut pipe from the structure. After removing a piece of metal, a disconnecting device is placed in the slot, which is a set of disks made of wood and rubber, as well as small bowls with viscous clay. If you stick to the tee method, then there will be two such slots.
6. Pipe installation. When the disconnect device has covered the gap, it's time to start making the main hole - under the attached (new pipe). Check the correct diameter, it is possible that the markings will have to be corrected. Make a hole, install a pipe. Weld the joints of the pipe on both sides, then close the valve on it.
7. Closing the hole. So, the pipe is welded, now you need to weld a new pipe. To do this, first remove the remains of the metal that appeared as a result of making the main slot. Put them in their place, work with clay, and brew them too. Check if the welding seam is leaking gas (using soap).
8. Attaching a new pipe.

After installation, it is desirable to paint metal structures in order to protect them from corrosion.

Cutting into a plastic pipe

Increasingly, plastic structures are used for the installation of engineering networks. If you need to connect to such a system, what should you do? First, be glad that the process will not be more complicated than in the case of metal. Secondly, strictly adhere to such recommendations.

Buy high-quality - factory, GOST-compliant connecting elements (fittings), ideally - metal. Use a socket joint and special glue to increase the reliability of the seam. Make sure that the junction is perfectly sealed, has a maximum density. Before installation, treat the insert with an anti-corrosion compound.

How is the tie-in itself carried out in the case of plastic networks? The connection is made by creating inserts perpendicular to the working system. The length of the inserts can vary within 70-100 cm. The extension should take place with the help of plastic pipes - on the basis of a socket-contact connection. What is this technology? The steel insert is heated (approximately to the level of 60 degrees). And a plastic structure is already being put on it, moreover, instantly and with force. If you crash into a system with medium pressure, experts advise connecting powdered polyethylene to the “case” in order to make the connection as strong as possible.

This is how the connection to the plastic network occurs

Crashing into a gas pipe is certainly better with the help of professionals, however, knowing the theory, you can experiment, meanwhile, it's up to you.

Video: tie-in into the gas system using special equipment

A tie-in is the connection of a pipe to a gas pipeline under pressure. Technologies make it possible to make tie-ins even into main gas pipelines without stopping gas pumping.

Conditions for tapping into a gas pipeline:

1. the working pressure of the gas in the pipe should be 20–80 mm. water. Art.;
2. a tie-in into a high-pressure pipe can only be done after the pressure has dropped to an acceptable level;
3. if it is impossible to reduce the pressure, special equipment must be used;
4. without reducing the pressure, tie-ins into pipelines are performed only by organizations with special permits;
5. gas welding and cutting of metal can be carried out during the production of a tie-in at a gas pressure in the pipe of 40-150 kg / cm 2.

An insert into a gas pipe can be:

• Cold. The pipeline with such a tie-in operates in the normal mode, i.e. the volume and pressure of the gas do not change. The technology is usually used to connect new users to the main gas pipelines.
• Welded. Traditional welding on gas pipelines under pressure. This type of work requires high qualification and special permission.

How is tie-in into plastic gas pipelines under pressure

For such inserts, shaped parts and factory-made fittings are used. As a rule, fittings made of metal with a socket connection are used, which are glued after installation with special adhesive compositions. The adhesive seam must be sealed, and the steel insert must be treated against corrosion. The tie-in is made with steel inserts located perpendicular to the gas pipeline. The length of the metal insert is 70-100 cm. It is heated to 60 degrees and a plastic pipe is placed on it. The method is used for tapping into high and medium pressure pipes.

How is tie-in into steel gas pipelines under pressure

Steel gas pipelines remain the most common, and tie-in welding is the main type of connection. Of all the types, the T-shaped tie-in into the gas pipeline is most often used. Without reducing the pressure in the gas pipe, the tie-in is made through a valve or using a special PGVM device. The first method is inconvenient, in particular, because of the need for wells. The PGVM device in the walls of pipes with diameters from 186 to 529 mm allows cutting holes of 80 and 140 mm, making cuts through a pre-welded branch pipe. The method using PGVM is more technologically advanced, convenient and reliable.

How much does a tie-in into a gas pipeline cost in the Moscow region

In the Moscow region, only the gas supplier Mosoblgaz is engaged in gas pipeline tie-ins. All documents, specifications and approvals are issued by the same organization. The minimum price of a tie-in into a gas pipeline under pressure will be 30,000 rubles. The cost depends on the type of gas pipeline (medium or low pressure) into which the tie-in is made, and the length of the gas pipeline from the tie-in point to the house.

The cost of tapping into a low-pressure gas pipeline without shutting down

Tapping into a low-pressure gas pipeline without shutting down is the most common type of tapping when connecting private houses to gas networks. Prices for tie-ins to low-pressure gas distribution pipelines (up to 0.005 MPa) are minimal: in the Moscow Region they range from 30,000 rubles, in other regions of Russia from 15,000 rubles.

The price of a tie-in to a medium-pressure gas pipeline

Distribution gas pipelines of medium pressure include gas pipelines with pressure from 0.005 to 0.3 MPa. The cost of tie-in to a medium-pressure gas pipeline is one third higher than to a low-pressure gas pipeline, and ranges from 25,000 rubles, depending on the region and other circumstances.

The price of a tie-in into a high-pressure gas pipeline without shutdown

A tie-in into a high-pressure gas pipeline without shutting down (above 0.3 MPa) is approximately equal in cost to a tie-in into a medium-pressure gas pipeline: the cost in the regions is from 25,000–28,000 rubles, and in the Moscow region from 38,000 rubles.

Responsibility for illegal tapping into a gas pipeline

Despite the serious statistics of punishments for unauthorized tie-ins into gas pipelines, the number of cases of this type of violation does not decrease. The punishment for this offense depends on various kinds of circumstances that are taken into account in the investigation of each individual case. For example, if a violation is detected immediately after an illegal tapping into a pipe, the offenders may be subject to administrative penalties under Art. 7.19 of the Code of Administrative Offenses of the Russian Federation. In this case, violators will face an administrative fine in the amount of 1,000 to 3,500 rubles. In this case, the violator must pay off the debt to the gas supplier and reimburse the costs of restoring pipelines and other equipment.

If the tie-ins into gas pipelines were repeated, the violator evaded payment for the selected gas, his actions are regarded as a crime in accordance with paragraph "b" of part 3 of Art. 158 of the Criminal Code of the Russian Federation "Theft with open access". This article provides for a fine from 100 to 500 thousand rubles or imprisonment for a period of 2 to 6 years.

conclusions

Tapping into a gas pipeline is a responsible and unsafe operation that must be performed by specialists. Do not trust this work to random people and do not try to do it yourself - it can be life threatening.

Natural gas provides a person with heat and hot food. However, in order to implement these functions, it must be brought to the dwelling - to equip a pipeline connected to the central network, heating equipment and household appliances.

At the design stage of the highway, it is necessary to figure out what permits to be issued, how to properly crash into the gas pipeline and who to entrust such responsible work. The answers to these questions are detailed in the article.

In addition, we described different ways to connect to the central line, and also outlined the features of connecting to a plastic and metal pipeline.

A gas pipeline is a specialized pipeline, the purpose of which is to transport and store certain volumes of natural gas. It may have different design features that differ depending on the tasks assigned to the trunk.

For example, networks of international importance deliver huge volumes of gas over long distances, so they maintain a constant pressure at a high level. That is why any experiments with gas supply systems are inappropriate and can be dangerous not only for you, but also for others.

This means that the best option for working with the system will be to call the relevant services specializing in working with gas communications, which meets the requirements of the law.

The tie-in into the gas pipeline must be carried out by a gas service specialist who has the required level of clearance and observes all safety measures

Gas pipelines are arranged like the circulatory system of the human body. Their role can be compared with the coronary vessels. And already pipes of regional significance depart from the central ones, distributing blue fuel between consumers.

They are smaller than the main ones, and therefore the pressure in them is much lower. However, even in such gas networks, its jumps are possible both downward and upward.

Connection to gas communications occurs if the organization has a special permit. And you can try to do the wiring inside your house with your own hands. To do this, you just need to know a clear sequence of actions and adhere to the necessary security measures.

Bandwidth calculation rules

The main factor responsible for the continuous supply of blue fuel to consumers is the value of the throughput of the gas pipeline. The calculation of this parameter is carried out according to a special algorithm. Moreover, it is made regardless of the type of pipes used.

The maximum throughput can be calculated using the following formula:

Q max. \u003d 196.386 × D² × P / Z × T,

• R- working pressure maintained in the gas pipeline, plus 0.1 MPa or absolute gas pressure;
• D- inner diameter of the pipe;
• T is the temperature of the pumped blue fuel, measured on the Kelvin scale;
• Z is the compressibility factor.

This formula establishes the following pattern: the higher the value of the T indicator, the greater the network bandwidth should be.

Otherwise, depressurization of the gas pipeline will occur, which will inevitably lead to an explosion of this dangerous substance.

Having made the choice of the type of pipes for the gas pipeline, it is important to correctly determine the method of tie-in

There is a more complicated formula. However, the algorithm given above is quite sufficient to perform the necessary calculations prior to tie-in into the gas pipeline.

How to connect to the gas pipeline?

Tapping into the main network cannot be carried out with one's own hands - only with the help of specialists from gas companies who have permits and permission to carry out such work. Regardless of the chosen company, before connecting to communications, there is a large-scale preparation stage.

Preparing for the tie-in

If you decide to entrust the process of connecting to the gas network to the specialists of the relevant company, then you must contact the licensing service. Here, in addition to submitting an application of the established form, you will need to provide a package of documents provided for at the legislative level.

On the eve of the tie-in to the gas pipeline, it is necessary not only to make the correct calculations, but also to obtain the permission of the gas workers

When it comes to tie-in to the gas pipeline of a newly erected building, the owner should first of all provide a passport, an identification code and an approved one.

In addition, you should prepare a set of documents:

• statement, personally certified by the head of the territorial branch of the gas economy;
• permission to connect to the gas pipeline, issued by the department of planning of architectural arrangement;
• photograph made in the process of topographic survey of the area where the insertion will be carried out;
• technical passport for a private house, or a copy certified by a notary.

The picture must be certified by authorized employees of the gas service. It will capture the entire engineering infrastructure, including not only gas communications, but also water supply, heating pipes, and sewers.

If the house is under construction, then an appropriate architectural design, permission to build it and a floor plan should be provided.

And if its total area exceeds 300 square meters, it is necessary to submit a thermal calculation of the building, a situational plan of the site on a scale of 1: 5000, and the consent of neighbors to connect to the gas network, drawn up in writing.

The last document will be needed in the event that it is planned to start up part of the gas pipeline underground along the sections belonging to them.

On the eve of the work on laying a pipe for tie-in into a gas pipeline, it is necessary to obtain a documented permit of the established form

In most cases, permits of this kind are issued by the city's gas management department, since they are the full owners of gas pipelines.

In addition, you will need to provide technical passports or other documents attached to gas appliances that are planned to be installed in the building - permission to use the equipment in the place of residence, certificates of conformity, as well as service contracts.

You will also need an act of inspection of smoke and ventilation ducts and other documents provided for by law. Only having all the permits and acts in hand, you can start working on the tie-in, that is, exclusively on a legal basis.

It must be remembered that unauthorized connection to the main gas pipeline, without the execution of proper documents in the manner prescribed by law and coordination with the relevant services, is fraught with administrative measures. And if at the same time there was damage to the gas pipeline, then a criminal penalty.

Features of the tie-in process

The process of tapping into a gas pipeline is the connection of a new pipe, through which the substance from the central pipeline will be transported to the consumer. As a rule, connections of this kind are made without cutting off the gas supply in the main network.

An example of making a tie-in into a gas pipeline under pressure in a video:

Having a general idea of ​​the technical requirements and the procedure for carrying out work on connecting to the gas network, it will be easier to navigate in all the nuances, and it will become easier to control the work of the company with which the connection agreement has been concluded.

In addition, the absurd desire to crash into the gas pipeline on your own will disappear, inviting a jack of all trades in order to save money.

Share with readers your experience of coordinating documents and connecting to the central gas pipeline. Please leave comments on the article and ask your questions. The feedback form is located below.