Is it possible to cut an empty gas cylinder. How to cut metal with an oxy-propane torch? Necessary tools and materials

reservoirs 29.08.2019

reservoirs

Sooner or later, gas containers become unusable, then, in order to give them a second life, you can learn how to cut gas cylinder, which can become a source of heat or a convenient barbecue for summer holidays. In everyday life, a cut balloon can be useful, but in general it will be a source of pollution, which is very harmful to the environment.

Examples of the use of gas cylinders in cut form

Human invention gives many uses for such modified containers, for example:

capacity for an artificial reservoir in the country;
part of the autonomous heating system;
brazier / smokehouse / firewood;
hearth for the forge / fireplace.

You can come up with other types for the use of cut gas cylinders. If there was no such work before, then it is best to find out in advance how to cut a gas cylinder, the video will be ideal option, because it will allow not only to represent, but to see the process as it should be.

Rules to be observed while cutting

According to safety rules, there are several main rules for cutting containers in which gaseous substances. You need to know how to properly cut a gas cylinder before starting work - this is very important! To perform the necessary actions, you will need:

the gas cylinder itself, of course, is empty;
hacksaw for metal work;
construction funnel;
bucket;
watering hose;
grinder with a protective kit.

After all the tools are prepared, you can read the information or watch a video on how to cut a gas cylinder with a grinder to do all the work quickly and efficiently.

Work order: what to do?

First of all, you should start by opening the valve on the cylinder. Naturally, you should open it as much as possible, up to the very focus. This action will help to make sure that the gas that was previously in the balloon is completely absent by the time of the cut. After that, you need to put the balloon on its side. Knowing how to cut a gas cylinder, you can deal with this task quickly.

The next step involves the use of a hacksaw. start cutting brass valve balloon should immediately, as they say, "under the root." Brass, which will make it easier for a beginner in this business, is quite easy to saw with this tool.

It is important to remember that at the time of sawing off the valve, the help of a second person will be required. The fact is that in parallel it is necessary to pour water into the cylinder and to the place where the valve itself was located. This is necessary so that sparks do not occur - it will be safer if the vapors of the gas mixture are suddenly preserved.

Having cut off the valve, you should fill the cylinder with water completely. To do this, you can and should use a bucket or a watering hose. As before the balloon is filled, it should be shaken up, this is done in order to wash off the gas condensate from the walls, if any.

The next step is to drain the water after washing the cylinder. It is best to do this away from home, as the smell of gas will be noticeable for a long time. After all these actions, you can safely proceed to the main stage - sawing the balloon with a grinder. Typically, the thickness of the gas used in storage tanks is about 3 mm.

Thus, knowing how to cut a gas cylinder, you can cope with this task quickly and not get tired at all. This operation is not complicated, but it will allow you to create many different devices that are useful in everyday life and when performing various jobs.

Dear site visitors « » from the presented material you will learn how to independently and safely make a brazier from a gas cylinder. We need a gas cylinder ... Nowadays, you can make a brazier from various materials, such as metal or brick, but it will all cost a pretty penny. Every craftsman has the necessary tool ( welding machine, grinder, drill) Made from gas cylinders have proven themselves well, given material can be found at the scrap metal collection point, they will give it to you at the price of metal per kg. It will take 1 unit, but you need to correctly and safely cut the gas cylinder wisely. The first step is to drain the remaining gas, for which open the valve and put the cylinder on the ground, it is best to do this away from home, because the smell of gasoline does not disappear for a long time. Next, the gas cylinder is filled with water from the hose through the tap hole. After that, the crane needs to be unscrewed, but this is rarely done by anyone, basically it is cut down with a hacksaw for metal.

Let's take a look at what exactly is needed to create a brazier?

materials

1. gas cylinder 50 l
2. metal tube
3. professional pipe of rectangular section
4. hinges 2 pcs
5. pen 1 pc
6. heat resistant paint
7. board 25-30 mm
8. fittings

Tools

welding machine
drill
Bulgarian (UShM)
ruler
marker
brush

Step-by-step instructions for making a brazier from a gas cylinder | How to safely cut a gas cylinder.

The first step is to drain the remaining gasoline, for which we open the tap valve to the end and put it on the ground, it is better away from home, because the stench is excellent)) and does not disappear for a long time))
Fill with water from a hose through an open tap. Let stand during the day.
Next, you need to unscrew the tap, but it's difficult and it's better to just cut it with a hacksaw.
That's the way.
We drain the water and fill it again, that is, we rinse it.
To make sure that there is no gas left in the cylinder, then a wick soaked in kerosene is taken and set on fire.
Only after making sure that there is no gas in the cylinder, we fill it again with water and cut off the upper tap with a grinder, as well as the lower ring.

Next, the marking of the cylinder is carried out where the side seam of the cylinder is taken as the center. Then, 24 cm indented from the seam on both sides, and 2.5 cm indented from the side seams. For air supply, the indentation of 10 cm is also 10 cm long and the distance between the cuts is 5 cm.
The lid is sawn through, but not completely so that it is convenient to cook.

The air supply is cut.
Spacers are welded onto the lid so that it does not lead from overheating.
Drill holes for skewer.
A plate with slots for skewers is welded on.
The plate will close the gap when the lid of the grill is closed.
The hole is welded with a metal plate.
Next, the base for the brazier is made from a rectangular profiled pipe. Legs are made from round pipe.
Here's exactly what should happen.
Also, a removable table was made from the corner, that is, part of the corner was sawn off so that it would enter the cavity of the professional pipe.

For convenience of transfer handles are welded on.
The opening limiter is welded from the armature.
Hooks for hanging a barbecue and a poker are welded onto the end part of the base.
At the bottom there is a grid for laying firewood.
Next up is the table.

Skewers are compactly placed in the cavity of the pipe.
After that, the entire structure is carefully sanded and painted.

Before painting, it is advisable to light a fire and finally get rid of the smell of gas.

Enjoy your meal;)
As you can see, a gas cylinder, subject to safety measures, can be easily turned into a first-class barbecue. detailed instructions you have, so take it and do it. Everyone Thanks a lot for your attention! You can also watch the video and consolidate the material covered.

1 What you need
2 How to proceed
3 What to look out for

What can be done with a used gas cylinder? An amateur will throw it in a landfill; a real craftsman will find a use for the container. From a spent metal object, you can make a smokehouse, a brazier, a container for an artificial reservoir, a fireplace, and much more. But without cutting metal, it will not work. How to cut a gas cylinder quickly and correctly - further.

What you need

Despite the variety of ways to use an empty gas container, the principle of operation is similar in each case. preliminary stage includes the procurement of tools and equipment, namely:

hacksaws for metal;
grinders with a cutting disc;
construction funnel;
watering hose;
pump, compressor;
buckets;
the emptyest gas cylinder.

You may not need a pump or compressor - it all depends on how you fill the container with water. Now - about everything in order.

How to act

After making sure that you have the necessary equipment, you can start cutting the used gas cylinder. To do this, perform the following steps:

Release the remaining gas from the cylinder. It is necessary to open the valve to the stop, make sure that there are no gas residues. In the absence of sounds, the outlet of the valve is lathered and the emptiness of the container is estimated by the presence (absence) of "bubbles".
Lay the container on its side. So it is much more convenient to cut the gas cylinder.
Saw off the valve. To do this, take a hacksaw for metal and saw it with a brass element as close as possible to the place of docking with the main tank. It is advisable to use the help of a second person, who, while you are sawing, pours water on the cut to avoid sparks. Cutting the valve with a hacksaw is preferable to a grinder, however, it does not exclude the possibility of sparking by 100%.
Fill the bottle with water. After removing the valve with a funnel and a hose, the container is filled with liquid. As the volume is filled, the balloon must be shaken to remove the remaining condensate from the walls. Pour water to the top.
Drain the water. It is better to do this away from the living quarters, since propane residues have a strong bad smell. You can endure it, but the drain site will smell for at least a week.
Start cutting the container. To do this, the user is armed with a grinder and cuts metal. The thickness of the latter rarely exceeds 4 mm, so the angle grinder will cope with the balloon in 15-20 minutes.

To minimize the risk of sparks when cutting with a grinder, do not wait for the inside of the cylinder to dry, but start work immediately after draining the water. The remaining liquid on the walls envelops propane particles (if any) and also serves as a “lubrication” for the cutting disc, softening its operation.

If you think that this is all the information on how to properly and quickly cut a gas cylinder with a grinder, then you are mistaken. There are several points that a beginner will never pay attention to, and the master, using them, optimizes his work.

What to look out for

In addition to the many nuances when working with a grinder, it is important to know how to reduce the risk of injury and other unpleasant consequences. The tips below will help you with this.

Remember - the stronger the smell of propane when rinsing, the higher the likelihood of sparks, ignition and explosion!
It is advisable to unscrew the valve away from living quarters.
It is not recommended to cut metal with a cigarette in your mouth, near a fire or other sources of fire.
It is forbidden to stand in front of the gas outlet from the cylinder. Also, experienced people do not advise visually checking the condition of the valve as propane is removed, especially with a characteristic hiss.
Remember the accuracy of marking the place of the future cut. Decide in advance what the cut balloon will turn into, and based on this, draw a line in black (or another noticeable) color.
Take into account the fact that after working with a grinder, the cut will be slightly narrowed.
Do not forget about personal protective equipment - gloves, goggles, clothing that covers the sleeves, and a respirator.
Since the walls of the cylinder are very thick, the angle grinder disk during operation can pinch and split, causing injury to you. If it is possible to use cutting discs of different thicknesses, do so. First, the metal is cut with a thicker element (for example, 1.6 mm), then with a thin one (1 mm).
If you have not previously had a chance to observe the inner surface of a propane tank, you should know that there is sealing ring. It is located between the concave and cylindrical parts of the container and also requires removal. To remove it, the junction is slightly sawn through (again with the help of an angle grinder).
The ring can be removed easily if the inner and outer parts of the cylinder are tightly joined, or with difficulty if they are connected with a gap. For removal in the latter case, a chisel and a hammer will help.

When working with a gas cylinder, safety precautions must be observed

In short, this is all the information on how to safely cut open a propane tank. Further actions- at the discretion of the user. The container is used immediately after cutting or is painted, cleaned, etc. To remove the old coating of old paint and rust, the cylinder is cleaned with a grinding petal wheel, again using a grinder. This facilitates further painting or other surface treatment.

Do you know other ways to cut gas cylinders? Tell us about it in the discussion for the article.

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wikimetall.ru

How to cut an old gas cylinder with a grinder

Sometimes it is necessary to cut an old gas cylinder in order to put it to good use on the farm. For example, a cut gas cylinder can be used as a water tank in an autonomous heating system. Due to the design features, a cut cylinder is convenient for making fire in it, and can serve as a hearth for a forge.

There are rules for cutting containers in which combustible materials were stored. This article, in particular, will tell you how to saw through an old propane gas cylinder.

Necessary tools and materials:

Empty propane gas tank
Hacksaw for metal
Funnel and water bucket or garden hose
Empty plastic bottle
Bulgarian and protective mask for grinder

Work order

Open the cylinder valve to the stop and make sure that there is no gas left in it. If there is no sound of escaping gas, it is necessary to soap the outlet of the valve, check that all the gas has escaped.
Lay the balloon on its side.
Take a hacksaw for metal.
Start sawing off the brass valve of the cylinder “under the root”. Brass is easy enough to cut with a hacksaw.
Enlist the help of a friend: while sawing off the valve, a second person should pour water into the place where sawing off from plastic bottle or garden hose to prevent sparks.
After sawing off the valve, fill the balloon with water. To do this, you can use a bucket (fill water through a funnel) or a long watering hose. Fill the balloon to the top.
As the balloon fills up, shake it up to wash off the condensate from the walls.
After filling the cylinder, you can drain the water, but not near the house, but somewhere near the garbage dump, as the drained water sometimes emits a strong propane smell that does not disappear for several days.
After all the actions taken, the balloon is sawn by a grinder. The thickness of the metal is about 3 mm. So cutting shouldn't be a problem for you.

This is a standard technology for cutting containers that have stored combustible materials. Personally, I have already cut several cylinders with this method.

www.diy.ru

Fire extinguishers and cylinders for scrap metal

Today it is not so easy to find information on how to deal with fire extinguishers that have not passed a routine check due to their own deformation, external damage of any kind, as well as those that have expired.

Fire extinguishers: features of scrapping

Can fire extinguishers be scrapped? Basic information about the disposal of fire extinguishers often relates exclusively to agents that are used as extinguishing agents ( extinguishing agents). You can read about this in full in GOST R 51057-2001.

However, business leaders, car drivers, accountants, and people who own their own fire extinguishers are concerned about the following questions:

official delivery, with the decommissioning of obsolete equipment, some specific methods of disposal;

Can you just throw away the fire extinguisher?

Is it possible to make a profit from the delivery of an old fire extinguisher for scrap metal.

However, the main thing to understand is why a particular OT is sent to a landfill. Since various models are considered: repairable / not, refillable / not, mobile, portable. When an enterprise has purchased new fire-fighting equipment, the old one can be disposed of by concluding an agreement with a company engaged in the repair and filling of cylinders: on the purchase or exchange.

All types of fire extinguishers, no matter what level of fire they are intended for, are under pressure, this is the main reason why vtorchermet does not accept fire extinguishers. They belong to the category of explosive scrap, sometimes they fit the category of military. Collection points require the fire extinguisher to be cut open before being scrapped.

Severed fire extinguisher bottle

On forums where the topic of recyclables is discussed, including such as fire extinguishers, there are often comic tips to etch the entire cylinder on a fire, cut it up and send it to scrap. Although these words are not meaningless, experts warn that in powder (sometimes other types) fire extinguishers, the faucet or sprayer combined with it is clogged with powder microparticles, forming a rocky seal. Therefore, even if the instruments show that the cylinder is empty, this may not be true.

Cylinders of powder fire extinguishers

In addition, there are a number of recommendations established by GOST R 51057-2001, according to which the contents of each OT must be disposed of in a certain way. The simplest of them is for air-foam devices, where the foam has lost the properties for which it was intended. They are simply used for washing metal products.

However, the option of exchanging an old fire extinguisher for a new one at a similar price seems to be the most acceptable for two good reasons: a small profit and the removal of responsibility for the further fate of an outdated fire extinguisher. There are also a number of companies involved in the purchase of old fire fighting equipment of various sizes, where the price is set for each specific unit. Another option is to issue a waste passport through the FKKO (for example, the self-activating powder code OT 48922111524), but this is a lengthy and costly process. Therefore, when not so many fire extinguishers have gathered, up to 10 units over decades, it is easier to use the services of a service that disposes of them for pickup. Or, if it is possible to disassemble or cut the fire extinguisher and hand it over for scrap.

The fire extinguisher can simply be disassembled, if there is knowledge and experience - in this form, the secondary metal will accept the fire extinguisher

Gas cylinders for different types of gases: propane, oxygen, acetylene, others

Since 2015, new rules for the operation of gas cylinders have been in force in Russia, regardless of the type, transported or stored substance. Now the owners of such technical equipment need to hand over the cylinder for testing before filling, which confirms / refutes the full compliance of the products with the established standards, their suitability for operation.

This provision caused an increase in consumer demand for new cylinders, as well as an influx of scrap in the form of Soviet-style cylinders. This topic was actively discussed by the press and remains relevant for members of the forum on various sites dedicated to the subject of recycled materials.

Video - how to disassemble a propane gas cylinder yourself:

Today, even on the Internet, there are many offers for the purchase of used used cylinders, which differ in the following parameters:

type of gas to be placed for propane, oxygen, helium, others;

displacement, accepted from the smallest to just large for several hundred liters;

technical condition, operational life before.

However, in reality, few people accept this type of scrap metal (whole old cylinders) for money or really expensive. The most common form of transactions is pickup and “thank you” (we are talking about whole, not dismantled cylinders). Owners of gas cylinders who no longer need this item of household utensils often agree to such conditions and, by the way, are satisfied.

There are a number of reasons for this:

cannot be thrown into the trash can;

permission is required to transport to the landfill;

self-disassembly of a gas cylinder is unsafe (although it is possible).

The last point for those who certainly want to make a profit for old cylinder by selling it for scrap. There are a lot of separately taken situations: they try to transfer propane, helium from one cylinder to another, often forgetting about creating special conditions for such a process; cut off only the tap or valve.

A propane tank is a very dangerous item.

However, according to the rules, vtorchermet cannot accept gas cylinders anyway, since they remain explosive and fire hazardous and require special processing. Therefore, the owners, in theory, should be sent to specialized points where scrap of the appropriate category is accepted or that allows the delivery of such technical trash, for example, military salvage.

New operating rules affect the recyclable market

The exchange option remains ideal, which is also common for gas containers (liquefied gas cylinders), as well as for fire extinguishers. This is used when the cylinder is still needed, but the old one has already arrived unusable.

In order to improve the situation associated with the use of gas cylinders, to reduce the occurrence of the following cases: leakage, explosions, other incidents, the new rules provide for the mandatory acceptance of old cylinders by the party involved in the sale of this type of equipment.

So, for example, the LOGazinvest company notified its subscribers about the acceptance of cylinders with an expired service life, even those that have been used for 40 years or more. It should be noted here that a special contract is needed for the delivery of gas in cylinders. We are talking exclusively for clients of a particular company: registered and owning a full package of documents. However, this is only particular example, which are many in Russia.

conclusions

LPG cylinders

So, any cylinders that are designed to store substances under pressure (propane, oxygen, acetylene, nitrogen, argon, helium) CAN be scrapped, for this they must be “neutralized”:

cut in any way - grinder, cutting torch etc.;

disassembled - the bottom must be visible, the container must be constantly open;

dismantled by explosion, damage, etc. - i.e. any cylinder that is ruptured, visibly open and without pressure.

In these cases, the cylinders will be accepted as a category of scrap metal - 5A, at the appropriate price. Pickup will be subject to availability. a large number- from 3 tons.

Such a cylinder is no longer dangerous - it will be accepted by any scrap metal point

If there are a lot of cylinders, then, in addition to dismantling them, it is possible to collect cylinder valves and hand them over separately as brass scrap.

Brass valves from cylinders - they can come in handy, or you can scrap them

If there are only 1 or 2 propane cylinders that are hard to scrap, and there will be very little money for them, you can do something useful, for example, a brazier. To learn how to make a brazier from a propane cylinder, see this video:

Someone makes potbelly stoves from propane cylinders - quickly, cheaply and reliably, and most importantly, simply and affordable:

Potbelly stoves from propane cylinders

xlom.ru

How to properly cut a propane tank

Submitted by tumbayumba on Thu, 03/22/2012 - 09:20.

Having decided on the hard work of creating a main cofon (hapi-drama, hank-drama, etc.) from a propane tank, you will certainly encounter certain difficulties.

apart from the work of cutting the petals and subsequent processing, the most dangerous part of the work is to bleed off the remaining gas and cut off the valve. Generally speaking, it is not recommended to cut open a used gas cylinder under any circumstances. But if you still decide to do this operation, use the tips below.

This article was taken from the DIY site, author Roman Chirko.

Despite the variety of ways to use an empty gas container, the principle of operation is similar in each case. The preliminary stage includes the procurement of tools and equipment, namely:

grinders with a cutting disc;
construction funnel;
watering hose;
pump, compressor;
buckets;
the emptyest gas cylinder.

You may not need a pump or compressor - it all depends on how you fill the container with water. Now - about everything in order.

How to act

After making sure that you have the necessary equipment, you can start cutting the used gas cylinder. To do this, perform the following steps:

Release the remaining gas from the cylinder. It is necessary to open the valve to the stop, make sure that there are no gas residues. In the absence of sounds, the outlet of the valve is lathered and the emptiness of the container is estimated by the presence (absence) of "bubbles".
Lay the container on its side. So it is much more convenient to cut the gas cylinder.
Saw off the valve. To do this, take a hacksaw for metal and saw it with a brass element as close as possible to the place of docking with the main tank. It is advisable to use the help of a second person, who, while you are sawing, pours water on the cut to avoid sparks. Cutting the valve with a hacksaw is preferable to a grinder, however, it does not exclude the possibility of sparking by 100%.
Fill the bottle with water. After removing the valve with a funnel and a hose, the container is filled with liquid. As the volume is filled, the balloon must be shaken to remove the remaining condensate from the walls. Pour water to the top.
Drain the water. This is best done away from the living area, as propane residues have a strong unpleasant odor. You can endure it, but the drain site will smell for at least a week.
Start cutting the container. To do this, the user is armed with a grinder and cuts metal. The thickness of the latter rarely exceeds 4 mm, so the angle grinder will cope with the balloon in 15-20 minutes.

To minimize the risk of sparking at , do not wait for the inside of the cylinder to dry, but start work immediately after draining the water. The remaining liquid on the walls envelops propane particles (if any) and also serves as a “lubrication” for the cutting disc, softening its operation.

What to look out for

In addition to the many nuances when working with a grinder, it is important to know how to reduce the risk of injury and other unpleasant consequences. The tips below will help you with this.

Remember - the stronger the smell of propane when rinsing, the higher the likelihood of sparks, ignition and explosion!
It is advisable to unscrew the valve away from living quarters.
It is not recommended to cut metal with a cigarette in your mouth, near a fire or other sources of fire.
It is forbidden to stand in front of the gas outlet from the cylinder. Also, experienced people do not advise visually checking the condition of the valve as propane is removed, especially with a characteristic hiss.
Remember the accuracy of marking the place of the future cut. Decide in advance what the cut balloon will turn into, and based on this, draw a line in black (or another noticeable) color.
Take into account the fact that after working with a grinder, the cut will be slightly narrowed.
Do not forget about personal protective equipment - gloves, goggles, clothing that covers the sleeves, and a respirator.
Since the walls of the cylinder are very thick, the angle grinder disk during operation can pinch and split, causing injury to you. If it is possible to use cutting discs of different thicknesses, do so. First, the metal is cut with a thicker element (for example, 1.6 mm), then with a thin one (1 mm).
If you have not previously had a chance to observe the inner surface of a propane tank, you should know that there is an o-ring. It is located between the concave and cylindrical parts of the container and also requires removal. To remove it, the junction is slightly sawn through (again with the help of an angle grinder).
The ring can be removed easily if the inner and outer parts of the cylinder are tightly joined, or with difficulty if they are connected with a gap. For removal in the latter case, a chisel and a hammer will help.

In short, this is all the information on how to safely cut open a propane tank. Further actions are at the discretion of the user. The container is used immediately after cutting or is painted, cleaned, etc. To remove the old coating of old paint and rust, the cylinder is cleaned with a grinding petal wheel, again using a grinder. This facilitates further painting or other surface treatment.

Do you know other ways to cut gas cylinders? Tell us about it in the discussion for the article.

Cutting metal with an oxy-acetylene torch requires certain precautions and correct sequence actions. This gas equipment belongs to the category of flammable and explosive.

1

The process of cutting with a gas cutter occurs due to the combustion of metal in a jet of oxygen supplied under pressure. The alloy must first be preheated to the required operating temperature using a burning mixture of acetylene and oxygen. The only metals that can be cut in this way are various grades. Stainless steel, non-ferrous metals and alloys cannot be cut with an oxy-acetylene torch.

To perform this type of work, in addition to the corresponding kit gas equipment the following will be required:

Fire extinguisher.
Protective equipment: special goggles; thick leather gloves; sturdy work shoes with leather soles.
Appropriate clothing - Flame retardant clothing is recommended, but if this is not available, well-fitting cotton clothing will do. You can not wear things from synthetic and flammable fabrics, loose cut, torn or worn edges.
Tools for measuring and marking: a ruler, a square and a pencil made of soapstone.
Torch lighter - Designed to properly ignite the torch flame. It is very dangerous to use ordinary matches, lighters.

2

To ensure safe work using a gas torch, you must follow the following rules and recommendations:

3

In order to work with a gas cutter safely, it is important not only to choose the right one, but also to connect and configure it correctly. First, the corresponding tubes are connected to the cylinders with oxygen and acetylene. Oxygen hoses and tanks are usually green, acetylene ones are red.

At both ends of the hoses, safety locks (a device that delays backfires) should be installed.

The next step is to check the correct operation of the acetylene supply. First, the flow control valve is closed - the T-handle is rotated several times back. On the cylinder, in its upper part, open the valve - turn it by 1 turn of the brush. They do this for security purposes. The acetylene pressure in the cylinder must not be allowed to exceed 1 atm - in the case of high pressure this gas becomes unstable and may even spontaneously explode or ignite. To check that the acetylene pressure is adjusted correctly, perform the following steps:

The main container valve is unlocked, then the control valve is opened by turning the knob clockwise. This must be done very slowly, following the readings of the pressure gauge installed at the outlet. low pressure. The control valve is opened until the pressure is 0.34–0.54 atm.
Then they purge air from the hose - open the acetylene valve of the cutter until the sound of escaping gas appears. After that, look at the readings of the low pressure gauge. When purging, the pressure value must be stable (if not, then make sure that the regulator is installed correctly).
The cutter valve is closed.

Check and adjust the oxygen supply - turn off the regulator of its supply (twist down), and then adjust the pressure. To reduce the oxygen supply, twist the manometer knob a few turns back. Then follow the sequence of the following steps:

On the oxygen cylinder, the main valve is fully unlocked. It is double-seated and in the event of its partial opening due to the high pressure in the cylinder (150 atm), oxygen escapes around the seal ring of the valve stem connection.
Slowly open the supply regulator, following the readings of the pressure gauge installed at the low pressure outlet, until the oxygen pressure is set within 1.7–2.7 atm.
The atmosphere is blown out of the hose - the oxygen valve is opened on the cutter. The cutter has 2 oxygen valves: one closer to the hose controls the supply to the chamber, where oxygen is mixed with acetylene to heat the steel (combustion of the mixture), as well as to supply it to the oxygen nozzle for cutting; the other is located farther and supplies oxygen to a separate cutting nozzle (until this valve is opened or the special cutting lever is released, oxygen should not exit the torch mouthpiece). First, the first valve is opened - it is turned several times, providing a sufficient supply of oxygen for both functions. After that, the second (front) valve is slightly opened - for a while until the hose is cleared (3–5 s for a tube 7.5 m long).
The front valve is closed.

4

Before lighting the torch, you need:

make sure that all connections (valves, pressure gauges, hoses, other fittings) are tight - any gas leakage can instantly cause a fire;
check again the place of work for the absence of flammable materials, strangers (especially children), animals;
make sure you are ready to go;
wear protective goggles and gloves.

The acetylene valve on the torch is then opened, allowing the oxygen in the mixing chamber to escape. A few seconds are enough for this. Then the valve is turned on until you can hear that acetylene is barely coming out. A special lighter for it is placed in front of the cutter, as shown in the video, so that its inside touches the mouthpiece. Then press on the lighter lever. When the sparks produced ignite the acetylene, a small yellow flame should form in front of the mouthpiece.

By twisting the gas supply valve, the flame length is increased to about 25 cm. The torch should start at the very mouthpiece of the cutter. The flame will break away from it or jump when too much acetylene is supplied.

Slowly open the front oxygen valve. In this case, the flame should change color from yellow to blue - at this moment, such an amount of oxygen will be supplied, which is sufficient for the complete combustion of acetylene. The oxygen supply should be increased until the inner blue flame is reduced and compressed towards the mouthpiece.

The oxygen valve is opened even more - the size of the torch is increased until the length of the inner flame becomes slightly greater than the thickness of the steel being cut (for cold-rolled sheet thickness of 9.5 mm, it is enough to exceed the flame length by 1.3 mm). When a "sniff" is heard or the blue flame appears to be feathery and unstable, it means that the oxygen supply is too high. It is reduced until the entire flame stabilizes, and the inner one takes the form of a clear cone.

The inner flame is brought with the very tip to the surface of the steel being processed. It is heated until a puddle of molten luminous metal forms at the point of contact. The tip of the flame must be kept still at a distance of about 10 mm from the surface of the steel, as shown in the video, so that all the heat is concentrated in one area.

5

The gas cutting valve handle is slowly released down - a stream of oxygen is supplied, igniting the molten metal. If a violent reaction immediately begins to occur, then the steel has caught fire and you can continue to gradually increase the oxygen pressure until its jet cuts through the material through and through. When the reaction does not go, the metal is not heated enough to ignite in a stream of oxygen. It is necessary to add oxygen to the heating flame and allow it to heat the steel.

When the oxygen jet begins to cut, the cutter mouthpiece is slowly moved along the cut line. At the same time, almost all products of processing (molten slag, sparks) are blown away by a jet to the rear side of the cutting zone, as shown in the video. If this flow reverses or slows down, slow down the torch or stop it and heat the material even more (better to work very slowly rather than trying to cut too fast). Cutting continues until the intended cut or separation of the metal is completed.