How to cut a gas pipe under pressure

Tapping into a pressurized gas pipe without welding with your own hands

It is not possible to join the gas pipeline and gas consuming facility that is newly built and in operation, as well as those that have not been accepted by a special commission, in addition, it is forbidden. To connect such facilities, you need a certificate of acceptance of their operation, according to the instructions, which are approved by the head of the engineering department of the gas company.

To connect to the gas system, which is in operation, you can only start the gas in the gas ducts or facilities. And in the end of the gas wire, which is connected, it is necessary to install a barrier cover. If there is at the end of the gas system, which is connected to a special shut-off device, then the barrier cover must be installed after it. Gas supply lines to the premises must be disconnected from the internal gas supply line before the connection procedure.

In order to put the gas pipeline of industrial production or agricultural or communal enterprises into operation, it is necessary to inform the gas service of the city of the connection of the gas system of the enterprises to the city distribution point for starting the gas substance in the network of the enterprises. Also inform the district office of the city gas service by submitting a corresponding application from the enterprise.

Then, when the company receives gas from the gas main, its gas pipeline must be connected to the gas main on the basis of the act of introduction of the gas system. The work of connecting to the gas pipeline shall be carried out by a special gas service.

All gas pipelines and gas facilities, before connecting them, must be inspected externally and checked for pressure. Pressing with air or inert gas. Pressure testing of the external gas pipelines of any pressure must be performed at a pressure of 0.02 MPa. The pressure may fall, but not more than 10 dPa per hour.

The control process of pressure testing of internal gas pipelines of industrial or agricultural enterprises, a company that serves the public and has production tasks, appliances and devices of the gas supply system should be performed at a pressure of 0.01 MPa. But the pressure can only drop to a maximum of 60 daPa per hour.

The pressure at 500 daPa per hour is applied to the internal gas supply system and equipment of the enterprise serving the population and having nonproductive purposes, residential houses and public buildings. Pressure reading when dropping no more than 20 daPa for five minutes.

Tank with liquefied gas, gas piping system group cylinder unit are tested by the control process of pressure testing of the pipes at a pressure of 0.3 MPa in an hour time interval.

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

The results are documented in an act and recorded in the order for hazardous gas works. The air pressure readings in the gas piping system that is being connected must be maintained until the very initial stage of the connection process and the start of the gas.

If inspected and pressure-tested gas pipelines are never filled with gas, they must be inspected and tested again under the conditions of restarting operations.

Gas tapping and welding work on gas facilities that operate in normal mode, in the case of connecting them to other gas systems, must be carried out under gas pressure within 40150 daPa. These values are checked during the entire time period when the work is carried out. In case the pressure starts to fall below 40 or rises above 150, the tap-in and welding works must be stopped. Monitor the pressure readings on the required section by means of the installed pressure gauge.

When the pressure in the piping system is lowered during tie-in, it is checked by a special cut-off device or pressure regulator. If special appliances are used that ensure complete safety and high quality performance of the processes, it is allowed to be connected without reducing the pressure values. The method by which the gas line is to be tapped to that which is already in operation shall be established by the company.

Procedure of cutting in gas lines with gas is carried out in accordance with the instructions, which are developed by enterprises of the gas industry. No unauthorized persons, no smoking and no open flames in plumbing area.

Various pits on the ground during the tapping operation must be fenced off near the work area by posting warning signs: No Trespassing!, No smoking! and Warning! Gas! Exercise caution!

It is also prohibited to introduce gas into the gas system if it has not been checked for integrity through inspections and testing procedures, in addition to checking that the gas fixtures are in good working order and that the mandatory barrier caps are in place. Start the gas supply in the special residential equipment before the occupants of the house have moved in.

Gas installations must be purged before all air is displaced when starting the gas. Completion of blowing can be determined by analysis or by burning samples that are taken. In this case, oxygen should not contain more than 1% of the gas, and the test sample of gas should burn without exhaust and fairly measured.

When the gas line is purged, it is forbidden to spray a mixture of gas and air in the building, stairwells, chimneys and ventilation system. The building where the appliances that consume gas, gas line, gas equipment at the start of the gas substance must be regularly ventilated.

The mixture of gas and air in case of blowing the gas line must be vented in an area where there is no risk of its passing into the room, moreover, where there is no flame from any source of fire.

Tying into gas pipe

When starting up the gas supply for the first time, take care to ensure that it is supplied at a pressure no greater than that for which the gas supply system was designed. At the time of start-up and immediately afterwards, it is necessary to keep a vigilant eye on the entire gas supply system, in the case of laying underground, on all objects, including the basement, wells, buildings that are within a radius of 15 meters from the gas source of the pipeline. Increased monitoring is necessary in winter and spring, when the frozen ground mass above the gas pipeline structure can make it difficult to bring gas out of the ground. Do not forget that when gas leaks from the gas duct underground, it moves in the ground mass at a speed of up to 7 meters per hour.

Work on the connection of a new gas pipeline to an existing, fully operational, must be carried out by specially trained people under the supervision of specialists in the field of gas.

Work on the connection to the gas network is considered gas-hazardous, which is carried out according to a scheme that is approved in advance. An order is issued for such work. In the preparatory stage of the working process it is mandatory to make a drawing of connection nodes, determine the method of connection works, calculate the procedure of reducing the pressure in the pipeline, of course, where required, and ensure that they are stable for the duration of the connection. Also calculate the necessary materials, protective equipment, rescue equipment, first aid equipment. In addition, the barrier covers and valves on the gas line, which is joined, must be closed.

Algorithm of the drilling process with a drill bit

Drilling the surface of the pipe should be directed strictly to the diameter, otherwise it will not be possible to achieve a positive end result. 1. Mark on the end of the pipe with a marker the point of intersection of diameter with the walls of the product (there are many ways and devices to do this). 2. Install the pipe so that one of the marks is strictly on top. Using a tape measure measure the required distance from it along the formative and mark it with a marker.

Clamp the pipe in a locksmith’s vice and nail the marked point using a punch and hammer.

Turn the pipe around in a vice, mark the point opposite to the first and also nail it. 5. Using a slim drill bit and a drill, drill holes in the two designated points on the pipe. 6. Then we drill them with a drill bit with a larger diameter through in one pass, because there is an upper guide hole and a lower centering hole.

Replace the twist drill bit in the drill chuck with the pilot drill bit and rotate the pipe 90 degrees in a vise so the guide holes are horizontal. This will allow more force to be applied to the drill bit.

As the ring bit gets very hot during the operation, to cool it down and make the process easier, liberally coat the working teeth and the adjoining cup belt in a circle with WD-40.

Insert the pilot drill bit into the previously prepared hole in the pipe and begin the process, adding lubricant to the pilot drill bit from time to time.

After the exit of the crown from the opposite side of the pipe, we get a cutout, which by configuration should exactly match the same diameter of the pipe, as confirmed by the appropriate check.

If it is required several equal in length branch pipes with shaped notches at the ends, we drill centering holes in the pipe blanks at an equal distance from each other and in turn, using a core drill bit, we receive the desired blanks.

Connecting by means of the canopy

The area to be joined is cleared of insulation residue.

Mark with a chalk and cut the pipe from the end, together with the barrier cover of steel. Then the canopy is cut in the expansion to a size that ensures the unhindered removal of the disc, which is cut out (the wall).

On the pipeline, you need to mark with a chalk the size of the diameter and its circumference, which is equal to the diameter of the product to be connected. In the center, weld a rod with a diameter of about 8 mm and a length of about 20 cm. It is necessary to remove the piece of pipe that is cut out.

According to the planned circle to cut the disk, leaving a small piece of about 5 mm for the disk to hold. Cut downwards.

Extinguish the gas, fill the hole with clay mixture along the path of the cutting tool. If the putty dries out, then re-lay it with the diluted clay mass.

The flame is extinguished and the cutout area is cooled.

Next, it is necessary to install, weld and weld an extension for the connection in the absence of the canopy to the gas network and the pipe to be connected.

It is required to insert a disk of wood with a sealant into the expansion through the hole. Fit the visor to the extension and to the gas piping.

Remove the wooden product by knocking out the cut surface of the wall with a hammer, remove it with a rod and firmly press the visor with the application of asbestos. Leakage must be prevented by using asbestos.

Fix the visor with a wire with a diameter of about 3 mm.

Blow out the connection area well, removing all the compound.

The visor must be welded on, having previously cleaned it.

Fit the pipes, install a steel gasket on top of the canopy and overlap weld. Laying more than 20 cm.

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

Knock on the joints, clean and check under working pressure, using soap emulsion. The area where the connection occurred, clean and cover with insulating tape.

Install the control pipe, fill the ditch.

Tapping into a gas pipe without welding with his hands

How to trim a gas pipe in an apartment

Cutting a gas pipe is quite dangerous because gas can be ignited not only by fire, but also from a spark, and a spark can occur when cutting the pipe. To protect yourself from an explosion, it is best to cut the gas pipe in the apartment with the help of professionals.

How to trim a gas pipe

You can cut a gas pipe in the kitchen with a pipe cutter, welding, a metal hacksaw, or an angle grinder. A metal saw to cut the pipes is now used quite sharply. Pipe cutter is not always convenient to use, because the gas pipes are usually located very close to the wall. The best way is to cut the gas pipes with an angle grinder or gas welder.

Procedure for cutting the pipe with welding

First of all, it is required to shut off the main riser pipe and thereby stop the gas supply to the apartment.

Next, immediately after shutting off the riser, it is necessary to let the residual gas out of the pipes. All you have to do is ignite the gas burners and wait for the flames to go out.

Now you can cut the pipe. When gas-welding, the metal base of the pipe simply burns when exposed to a jet of high-temperature oxygen. In this regard, the pipe is simply separated in the place where the gas welding was done.

Working with a gas welder requires serious training and a lot of experience, that’s why it is better to use the services of professionals to cut the pipe with this method.

Relocation of the gas pipe in the apartment is carried out as follows:

First of all, you must use a faucet to cut off gas access to the apartment.

Then it is necessary to blow the gas line to remove all remaining gas from it.

Next, at the point of connection to the gas line, the pipe is cut. The hole left after cutting must be welded.

Then a hole must be drilled in the area of the main gas pipe and an outlet made of metal pipe must be welded to it.

A faucet is connected to the metal outlet. After that, a branch line is made to the gas stove or column. The pipe is connected to them with a flexible siphon hose. This hose should be at least two meters long.

SNIP rules for carrying and installing gas pipes

Relocation of gas pipes in the kitchen and in the apartment requires compliance with the following conditions:

The gas pipe must not go through windows, doors, and ventilation grills.

The minimum distance between the electrical supply lines and the gas pipe must be in accordance with Electrical Installation Regulations.

The gas pipe must be laid at least 2.2 meters above floor level and to the bottom of the gas pipe.

Fastening of gas pipes to ceilings, columns and walls is performed with the help of hooks, clamps, brackets, hangers.

To shorten the gas pipe it is necessary to make a cut in the manner described above. The cut is welded with the help of gas welding.

Replacement of pipes

Replacement of gas pipes is quite rare, since the fuel itself does not have a serious destructive effect on them.

Usually it is due to external factors. metal corrosion from high ambient humidity or physical damage to the gas pipes. But, if the owner of the premises is willing, qualified specialists of the company “Gazovichkof Plus” will change all the required communications to more modern and resistant. It is also advantageous to replace the pipes during major repairs to prevent their obsolescence and physical deterioration, and the possibility of future breakthroughs.

Cut the gas pipe

You need to cut the gas pipe in the apartment. It goes all the way across the kitchen worktop, you have to cut it and put a hose to the gas pump. I do not know who to contact and how much it will cost?

#4 Offline Moose

Then there might be a problem with the gas station

There are always problems with something in this country. I’m not against gas workers, I know they do odd jobs. I just want to find a specialist.

#5 Offline vlad-ghost

You go to the superintendent and for a few thousand dollars, a plumber comes and does it

only a mother is worthy of love. and a turbosub 2.5 ))))

#6 Offline Nord

Look for private locksmith ads on avito.

#7 Offline vlad-ghost

It’s better for private citizens to stay away from GORGAZ, they have their own monopoly

Only a mother is worthy of love. and turbosub 2.5 ))))

#8 Offline Stripey

It’s better for private companies to stay away from GORGAS

They can burn down one house a month. officially. but they don’t scorch, and they get bonuses))

#9 Offline _Kus

Addressed the same issue in Gorgaz (on Sholokhova, the entrance to the right of the building). They offered to come over the same week.

True, my circumstances then changed. still have not taken advantage of their offer.

I don’t remember the exact cost, but it wasn’t expensive.

Modified by: _Kus, 16.07.2015. 09:47

#10 Offline Wit

Then you might have problems with the gas station

#11 Offline BJ /h3>

#13 Offline Wit

found a problem. warned the neighbors, shut off the valve in the entrance hall and that’s it

#16 Offline BJ /h3>

found a problem. I warned my neighbors, shut off the valve in the staircase and that’s it

#18 Offline BJ /h3>

#19 Offline Wit

well, i used to live in a 5-story building. There were few neighbors there)

#20 Offline vlad-ghost

They not only cut it, they also weld it under pressure, it’s a low pressure, you just put a wet cloth over it and that’s it

Only the mother is worthy of love. and turbosub 2,5 ))))

#23 Offline Efi0p

Last week they did it, I paid 3 rubles

#24 Offline Sia-Ori

Humbling. I’ll tell you one clever thing, but don’t be offended. Gas workers ALWAYS try to work without shutting off, under pressure, because running the riser in an apartment building. It’s a hell of a headache for a couple dozen people. I say this as a participant in such launches.

Cutting off a gas pipe

The gas pipe runs through my neighbor’s bathroom and porch to my kitchen. Does the easement provided for by and 277 Civil Code Neighbor threatens to cut the gas pipe.

Can gas workers cut off a subscriber’s gas pipe without a court order.

Cut the gas pipe and move the tap at whose expense it is done.

Does the gas company have the right to cut off the gas pipe coming into the house for debt.

Is it necessary to cut the gas pipe or is it enough to shut it off with a plug and put a seal?

My neighbor and I both installed an underground gas pipeline through the privatized plot of our land by a verbal agreement. The pipe has been paid for in equal shares. I have all the documents. the project, permission from the village administration, checks confirming my expenditures, etc.д. After the conflict my neighbor threatens to cut me off. Can he achieve that?

They refuse to seal the gas supply in a non-residential apartment. They say one can only cut off a gas pipe.

I bought a house with a plot of land, and the neighbor’s gas pipe is running on it. I want to remove it. So it interferes with the construction of the second floor. A neighbor refuses to put a pipe on the edge of the property at his own expense. Can I call the gas company to cut off or cut off the pipe? And our neighbor will lay it at his own expense, bypassing our property? On the basis of which article it can be done.

Do they have the right to cut off the gas pipe in October during the heating season because of debts when there is only gas heating in the apartment??

I have just bought a house. There is a gas line down the hallway to one of the neighbors’ stoves. There is no project and no mortgage on the gas pipe. Can I cut this pipe.

I bought a new stove. Need to install a new stove and cut off the iron gas pipe and install a flexible gas hose?

Along my brick fence there is a gas pipe to my house. The fence began to collapse and collapse on the gas pipe. The gas workers came and threatened to cut off my gas under the pretext of an emergency situation that I allegedly create. Can they do it. And what penalties I will face.

Question. Do the gas company, for a debt of 4000, while the landlady was away, have the right to cut the gas pipe from the street and put a plug.

I live in the Crimea. I want to know if I can unauthorized disconnect the gas stove, gas boiler, gas boiler, as well as cut off these pipes. No gas for 10 years.

Tell me whether the gas company has the right to cut off a gas pipe by hot welding, if there is no debt for gas. Before cutting the gas meter was sealed. The house is for sale and accordingly no one lives there, but we often visit the house to keep it in order. I am also wondering if the gas company is obliged to install gas taps from the main pipe to the house, so that if there is a problem they don’t have to cut it off but just block it and seal it?

My question is, has the gas company the right and power to cut off the gas pipe in my apartment by welding, for the debt for gas in the amount of 750 gr.?

I want to cut the unnecessary gas pipe in the kitchen. It is very expensive to change the design. I wonder if I can do all this without changing the project?

pipe, pressure

I bought a private house. The previous owner has allowed the neighbors to build a gas line on the front of the house. There is no shut-off valve. The pipe has never been painted in 20 years. Do I have the right to cut the gas line in my yard?

Such a situation: Gorgaz has to cut off the old gas pipe and cut into a new pipe at the same time, asking to pay 17500 for what they will turn off the gas in 20 houses on our street. Do we have to pay the bill??


We have just made a gas arch on our property, we did it ourselves during the gas outage. But today a gas attendant calls us and says he will cut off a pipe because we didn’t go to him, does he have the right to cut off the pipe?? I thank you in advance for your reply.

In the private sector 10 years ago we agreed with a neighbor for money to cut into his gas pipe, now he wants to cut the tap. They took a receipt from him, there’s a contract with the gas company, there are no debts, the connection is in the street and it doesn’t go through his territory. Can he legally cut off the gas?

Does the gas company have the right to cut off the gas supply? if the gas debt is 1700? Does the gas company have the right to demand money of over 10000 for cutting off and reconnection?

Live in an apartment building, the facade of my floor had a gas pipe, without my knowledge and coordination. First of all spoils the view of my apartment, plus it became even easier to get into the apartment. In short, there is a desire to cut the angle grinder to hell:) The apartment is privatized.

They came to us and shaking some decree, told to replace the gas stove with a new one and to replace the iron heating pipes (we have AOGV) with plastic ones, allegedly for security reasons. Otherwise they threaten to cut off the gas. Is it legal?? I am not happy with plastic pipes in principle. Evgeniya.

I have a court decision on overdue verification of the meter. We’ve agreed with the bailiff to pay in installments over eight months, but Mezhregiongaz also wants to cut the gas pipe. It turns out I’m being punished twice for the same thing. Is it possible.

On the first floor of a block of apartments a three-room apartment is being rebuilt as a hairdresser’s.

The gas service representative came to shut off the gas pipe in the second floor apartment. Is it legal?

What he did? He said that he came on behalf of the owners of the premises on the first floor to cut off their gas.

A worker from the gas station came and cut off the gas boiler from the supply because it was obsolete. I have a disabled mother who lives in this apartment. No requests to not cut the pipe did not help. I did not sign the contract. Can I complain somewhere?? By the way, the water heater worked fine.

No one lives in the dilapidated building. But the gas supply is still being charged. There was an application for termination of the contract for the maintenance of gas equipment, but it did not help. Usually they stop supplying gas for debts, but in my case, they just impose their services, which no one needs. What should I do, where should I write to cut off the gas pipe??

The house is divided into 3 owners, it originally belonged to my great-grandmother, when she died, Honor house was sold, and the second part was divided between me and my cousin by inheritance. The gas pipe runs through my part of the house and into my brother’s part of the house where there is a gas boiler that runs gas throughout the house. My brother’s boiler is in the basement under his part of the house. Repeatedly he threatened to cut me off the gas. Yesterday I came home and saw that he had a new gas pipe. I understand he’s decided to cut me off from the gas and heating. Is his actions justified? I am a pensioner and not possible to conduct the gas at their own expense. What should I do and where should I apply??

Example of work in the kitchen to move the gas pipe branch under the countertop:

Before moving the gas pipe tap was at a height of 1.5 meters from the floor. When planning the kitchen, the gas outlet with faucet was in the wrong place.

After the transfer of the gas pipe tap is at a height of 78 cm from the floor, which fits into the standards SNIP and placed under the countertop.

Tip: If you decide to move the gas pipe in the kitchen under the countertop, When designing the kitchen, immediately think about where to place the gas faucet! The gas tap should not be located in the sink area, in the drawer where the appliances are located. It is necessary to choose a free drawer with a width of at least 30-40 cm, in this case there will be no problems with the location of the gas faucet.

Rules for cutting a gas pipe in the apartment

Working with gas equipment seems to be one of the riskiest things to do in a home renovation. Often users do not even think it necessary to look into the safety regulations or standards for the activities. But these standards exist, and they strictly regulate who, how and when has the right to cut or move the gas pipe in the kitchen.

Not taking this case seriously enough can lead to disastrous consequences. There is a high likelihood of a gas leak. And a large amount of gas in the room can not only have a poisonous effect on people, but also cause a major explosion. So if there are doubts, you should not perform self-cutting. It is better to wait for specialists.

But here it is not superfluous to monitor the work of the master and compliance with all standards. Below are highlighted the basic information about the work and the main rules for working with gas pipes. They must be respected, even if all the actions are not performed by the owner himself, but by a specially called gas attendant.

Causes of cutting a gas pipe in the apartment

Moving the gas equipment

Cut the gas pipe in the apartment can be for a number of reasons. The most common is carrying out repair work related to changing the position of the stove or other gas equipment. Here it may be necessary to shorten the initial dimensions of the gas pipe.

Reasons for the transfer of gas pipes can be hidden in the requirement of the management company to put the meter in the open space, so you can easily see the indicators.

Employees of the gas service can draw the attention of owners to the need to change communications in connection with the recently enacted rules of operation. Updates to these rules are not uncommon, and apartment owners are not often notified of them in advance.

Requirements of the law for the customer and the contractor

Requirements for the Customer and the Contractor

The high level of responsibility when working with gas appliances has forced management companies to establish clear requirements for all parties involved. The law defines who can apply for work and who is allowed to do it.

Who has to submit the application?

Previously, it was the responsibility of the local gas utility to ensure that the gas lines were in good working order. But over time, authorities have seen that it is not possible to control all apartments in this way. And this obligation has been passed on to the tenants themselves. And the main responsible person is the owner.

Important! The rule is spelled out in Regulation 10 of 14.05.2013. In 2017, some more amendments were made to it, clarifying the rights and obligations of participants in the actions.

According to the decree, the owner or lessee of the premises must submit an application for work on gas equipment. In the second case, an officially certified document on the lease will necessarily be needed.

Who has the right to perform the work

Gas Master

Requirements for the contractor are clearly enough spelled out in the decree. The contractor must be a representative of the company that conducts maintenance of gas pipes by agreement with the management company. The work can be performed by representatives of the company of the resource provider itself.

The organization that will carry out the work must meet a number of mandatory requirements:

  • Employees of the company must have a certificate of certification to perform the appropriate work;
  • Profile education of employees;
  • Document that production briefings have been carried out at appropriate intervals;
  • The presence of specialized measuring equipment and working tools.

All tools used must be in good working order and must be calibrated from time to time to achieve the greatest accuracy.

Thus, strict requirements are imposed on the performer, which are usually not met by an ordinary user. Only a master knows how to cut a gas pipe without harming the overall communications system. That’s why trimming by oneself is considered illegal.

Preparatory stage. obtaining a permit

Obtaining permission to perform actions

Before carrying out the work, it is necessary to make sure that the idea can be realized. To get a certificate about this you can contact an expert organization.

The owner writes an application on his/her behalf, indicating the need for expert evaluation of the pipeline and requesting permission to perform certain works. The form of the application is free, addressed to the head of the organization.

Once an application has been received from the owner, the service staff must arrive at the place where the work is to be done at a certain time. The specialist will review the gas pipes and equipment, and then issue an opinion on the feasibility or impossibility of the planned work. If a particular plan turns out to be unrealizable, the specialists will try to suggest an alternative.

Once a decision has been made, the visiting specialist will create a diagram of the pipeline after the trimming. Then, under this scheme, the gas organization will issue an official permit to perform the work and provide an estimate of the cost of each action. The cost of the work, as well as the cost of the necessary materials will be taken into account separately.

Norms of installation of the gas pipeline

The owner of the apartment is advised to familiarize himself with the basic requirements for the location of gas pipes and equipment before coming to the master. This will save a significant amount of time during the work and monitor the activities of the master. The basic information on this issue is specified in the document SNiP 2.04.08-87.

Requirements for the location of gas pipes

Location Requirements

The document clearly spells out the requirements for the final location of gas pipes:

  • Free access to the gas pipe must be maintained, as well as the location of all measuring and metering devices in a visible area.
  • In an accessible place should be valves, shutting off gas access to the apartment. They should never be disguised or left behind large cabinets. At any time shut off gas must be available.
  • According to the requirements, any gas pipe must be at least 200 cm from the floor.
  • The horizontal part of the gas inlet in the apartment must always remain untouched. It is forbidden to shorten it in any way, much less remove it completely. But there are exceptions: on the last floors of apartment buildings some manipulations can be made with this pipe.

Important! For residents of the upper floors a certain indulgence in the form of a tap at a height of 75 cm from the floor. This allows you to somewhat simplify the process of organizing the kitchen space, without compromising safety.

Choice of material and method of performance

Choice of materials

After cutting the parts of the pipe sometimes have to be reconnected with each other. Welding is used for this purpose. When connecting different gas equipment. Cocks and regulators are provided with split connections.

During work on gas pipes, it is necessary to cut off the supply to the entire riser for a while to avoid leaks. Special services, which are considered to be representatives of the gas company, are called in. Do not cut off the gas supply yourself.

Flexible hoses can be used as material. But their use is permitted only for the installation of gas equipment and various metering equipment. The maximum length of such hoses should not exceed 300 cm. Hoses are made of rubber hoses, which are braided with metal casing.

The other elements of the pipeline must be made of metal of appropriate quality.

The main stages of the work

Procedure for Performing the Work

In order to avoid inconvenience during work, it is recommended to very clearly define the date and time of the repair. All this must be agreed upon with the supplier company in advance.

Since the entire riser pipe must be shut off while the pipe is being cut, all tenants must be warned of this. The employees of the utility service are notified. They will also make an announcement about the restoration of gas supply.

As soon as the specialist arrives in the apartment, he will have to shut off the gas, as well as to ensure proper ventilation in the room.

Gas pipe trimming work includes the following steps:

  • Direct removal of the excess piece of pipe in accordance with the established plan.
  • Installing a plug on the edge of the pipe.
  • Performing welding and connecting the necessary elements (if necessary).
  • Installation of shut-off valves, having previously applied sealing tape to the joints.
  • Check the gas line for holes and microcracks.

Since there is no gas in the apartment, checking the integrity is carried out with a soapy solution, which is applied to the joints. If bubbles appear, this will immediately be a signal to the master.

After the work, the master must be sure to draw up a special act, which will indicate all the actions that he made with the pipeline. The act is signed by the specialist and the owner.

Important! After completing all manipulations, the master will notify the client about the rules of operation of the gas pipeline and give recommendations regarding the painting of pipes.

Choosing a tool for cutting a gas pipe in the kitchen

Tools for carrying out the work

Cutting and relocating gas pipes in the apartment is a specific procedure, which will require special tools. Masters can use different devices, each of which has its own pros and cons.

Basic tools that allow you to cut the pipe:

  • Metal hacksaw. An excellent tool for quality and accurate cutting of pipes. But the use of a hacksaw will require a large amount of effort and time from the master.
  • Pipe cutter. Allows you to get a quality perpendicular cut in relatively little time. However, the use of a pipe cutter can be hindered by cramped conditions.
  • angle grinder. Effective and very fast way to cut gas pipes. Sparks occur during operation, so care must be taken to have protection.
  • Welding machine. Suitable in cases where it is impossible to use large tools. Qualitatively cuts the pipe without leaving marks. But the fire hazard of the method often relegates it to the back row.

The choice of tool lies entirely within the scope of the master who will come to do the work. It depends on a large number of factors, among which: the volume of the room, the location of the pipes, materials, etc.

In houses made of wood, it is not recommended to use an angle grinder or welding machine. This can cause open surfaces to ignite and cause a fire. If you have to work with these tools, you must take care to protect all the surrounding area. Gas cutting of pipe sections will additionally require protection of hands and face.

What equipment is used to cut the pipe with gas

Metal processing is performed manually and automatically. In the first case, equipment designed for gas cutting of pipes is used.

Flame cutting of pipes is done manually by marking with special equipment, as well as on automatic machines. For manual processing acetylene-oxygen, gasoline and kerosene-oxygen hand torches are used. The process is quite time consuming and requires skilled craftsman.

Uneven edges, irregular angles and shapes of bevels for welding are typical for workpieces, which are the result of manual cutting of pipes with gas. This makes it difficult to join pipes and parts. After the manual process is complete, additional edge treatment is required to give the desired shape and dimensions. This treatment is carried out with pneumatic chisels, grinders and files.

Automatic gas cutting of pipes is more effective. Special semi-automatic fixtures or machines are used during machining. Such units are distinguished by simple design, ease of maintenance, light weight, which allows to use them not only in stationary conditions.

When equipping the shops of pipe bases and factories, stationary machines designed for cutting pipes with gas are used.

Operating principle of the machine tool is as follows. Pneumatic cylinder presses workpiece with upper roller against leading rollers of friction rotator. Such equipment allows to work with pipes of different diameters without readjustment. The torch, which is mounted on the same arm as the upper pressure roller, is automatically moved up and away from the workpiece.

Efficiency and productivity of equipment is increased due to automation of main and auxiliary operations. Machine is controlled from a common console by a master gas cutter.

If trunking is required, automated equipment with several cutting heads is used. This method of processing is characterized by high accuracy and speed.

The simplest equipment that allows you to perform gas cutting of pipes includes:

A gas-welding torch is a torch that mixes oxygen and combustible gas in the right ratio, creating and maintaining a constant flame for cutting.

Torch is equipped with a special head with a number of nozzles. External nozzles mix combustible gas (acetylene, propane, methane) and oxygen, heating the workpiece to the desired temperature. Central. conveys an oxygen stream that cuts the pipe.

Processing is impossible without gas cylinders (oxygen and combustible gas), two-layer rubber hoses with diameter from 6 to 12 mm, gas supply. Hoses are designed to withstand temperatures up to.30- 35 °С.