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Description and characteristics of bellows liner. Selecting a gas hose to connect a gas stove or boiler Flexible bellows-type gas supply

Description and characteristics of bellows liner. Selecting a gas hose to connect a gas stove or boiler Flexible bellows-type gas supply

Gas hose, it would seem, what mystery could there be in this simplest product? Come to any hardware store, take it and go to the checkout. However, have you ever wondered what is the difference between a gas hose for gas stove and a gas hose for?

And most importantly, on the shelves of large retail chains such as Leroy Merlin or Maxid, this product is simply presented in a huge assortment. The question inevitably arises: which gas hose is better to buy? On one tray there is a PVC gas hose reinforced with polyester thread, on the other there is a bellows-type gas hose, and even lower down there is a rubber hose, and how can you not get confused?

More recently, literally a couple of decades ago, you would not have worried about the question of how to connect a gas stove. All gas household appliances, after purchase, were “tightly” and securely connected, as a rule, by the foreman of their nearest housing office using a steel pipe. Of course, we didn’t even think about aesthetics or design. There was only one task - to start using the new device as soon as possible.

Accession steel pipe undoubtedly has a number of advantages. Requirements such as strength, reliability, and safety are 100% ensured. There’s just one small inconvenience: the housewife most likely won’t be able to wash the floor under the stove for the next twenty years. AND kitchen furniture can't find it the right size, so that there remains 20 centimeters on each side of the slab, but it is not possible to move it. Finally, this kind of problem is a thing of the past, and there has long been no shortage on the domestic household market, and flexible gas supply is offered in a wide range.

Choosing a gas hose for a stove or boiler is a very serious step. The lives of many people depend on its strength, reliability and safety. Often, the result of an illiterate connection of a stove or gas water heater to communications is an explosion. For flexible liner natural gas Only special gas hoses are used. It is strictly prohibited to use tap water for this purpose.

Of course, it is better to call a specialist who will provide a professional connection and give a guarantee. Each of us has seen on the news what explosions lead to. domestic gas, including as a result of unqualified connections of household gas appliances. We know from childhood that we cannot joke with gas. However, a modern gas hose allows you to make the connection yourself. Adhering to basic safety rules, any adult man can perform such a procedure.

So, let's go to the store. Let's see what the seller offers there, which flexible gas hose to choose and buy for a gas stove? It turns out there are three main types of gas hoses used in everyday life:

  • – rubber-fabric;
  • – reinforced rubber;
  • - bellows.

Rubber gas hose.

The softest of all types of hoses are rubber hoses reinforced with textile thread. They have long gained a reputation as an unpretentious compound, and are often found in the household of a thrifty homeowner. Simple installation work, inexpensive cost, flexible properties and functionality are attractive qualities that determine popularity. There are always options on the shelves with different lengths and diameters.

Rubber is one of the the best materials dielectrics. They are used to supply liquefied gas from gas cylinders to household appliances and are used in dachas and private homes. This method of flexible gas supply is the simplest and cheapest, but also most dangerous.

The big disadvantage is that over time, cracks form in the rubber, leading to gas leakage. The only place where it is permissible to use this type of flexible liner - gas cylinders in the private sector. Among other things, the products lack the necessary rigidity.

It is not recommended to use rubber fabric sleeves for more than two years, but in practice they last much longer.However, modern rubber hoses are made with the inclusion of elastic components , which allow you to use the product for up to 5 years.

Reinforced gas hose.

The most common are rubber reinforced hoses that look like hoses for water supply. On the outside they are braided with steel threads. Although they are called rubber, inside they contain polymer material. Distinguish gas type For a water supply hose, it is easiest to identify the color of the threads woven into the outer braid; they should be yellow.

Metal braided hoses are inexpensive and easy to use, but some European countries have banned their use. In our country, gas workers also recommend gradually abandoning them or using them with precautions.

The plastic hose inside is subject to the same destruction and destruction as rubber. In addition, steel is a good conductor electric current, so the connection must be made with the obligatory use of dielectric gaskets.

Stainless steel bellows type gas hose.

Bellows-type hoses are the only ones approved by gas services for household gas appliances. What is a bellows? This is a corrugated, durable and dense shell that retains its properties when exposed to temperature, pressure and severe mechanical load.

The bellows takes its name from the English. branded Sylphon. It comes in single- and multi-layer types, and is made from both metallic and non-metallic materials. The shell serves as a barrier and gives the product increased safety.

Bellows flexible hoses are made of of stainless steel. They come in two types. The first in a metal braid without insulation, this type is suitable for ordinary stoves with traditional ignition from matches. If your modern gas stove is equipped with electric ignition and is connected to the electrical network, then you should not bother looking for a dielectric gasket.

It is easier to turn your attention to the second type with a yellow polymer coating, which is reliable electrical insulation. This protection is especially relevant for gas stoves equipped with various electrical components - electric ignition, lighting, electric grill. Polymer coating- it is durable, strong, reliable and guarantees absolute electrical insulation.

Recommended for uniform gas supply inner diameter hose at least 10 mm. The advantages of using bellows hoses are undeniable. Samples with a plastic coating, which guarantee excellent protection from various disasters, have proven themselves especially well.

Bellows hoses have a service life of up to 30 years. Their only drawback is their high cost compared to other types of gas hoses, but as they say, safety is more expensive! Moreover, the increased cost in percentage terms will be negligible compared to purchased gas equipment.

Bellows hose for gas, advantages:

  • The gas hose is manufactured in accordance with technical specifications and satisfies the regulatory provisions of GOST;
  • The only one approved for use by government services;
  • Component PVC coating provides the product reliable protection. Polymers are highly resistant to aggressive environments and mechanical shocks.
  • The gas supply line often remains undamaged, subjected to significant and sometimes critical loads;
  • Manufacturers set a long service life for the product, more than 25 years;
  • PVC protects against electrical influences of 1000 V or more.
  • There are no regulations regarding restrictions during operation.

How to choose the right gas hose

The main advice sounds quite banal: a gas hose without emergency consequences can be bought at any specialized store where you will be provided with a state certificate of conformity. When answering the question: which gas hose is better, bellows or rubber, opt for the first. And of course, beware of cheap Chinese counterfeits or from other countries that do not care about the company’s reputation. On the street market you can find high-quality fakes in which:

Gas hose made of very thin rubber, subject to rapid wear;
- many fakes appearance completely indistinguishable from the real thing, especially if you are an ordinary buyer and not a professional employee gas service

Don't forget to check the mark yellow color on the hose braid, it is this that indicates that you have a gas hose in your hands, and not a water supply line with a blue-red mark. It is not worth buying a gas hose with a “reserve”, first take the necessary measurements and add 20%, this length will be enough.

The manufacturer offers different lengths, but the most popular are one- to two-meter options. Standard diameters those used in everyday life are 1/2 or 3/4 inches. The gas hose is equipped with two union nuts with internal threads (American or in common parlance, mother-mother). The second type of hose, when there is a nut at one end and a sleeve with an external thread at the other - “male-male”.

Connecting the gas hose to the stove

After the purchase suitable option products, we eagerly move on to the steps of connecting the hose to the new stove. We find a fitting at the back of the plate, usually with an external thread. This is the gas inlet. Slab manufacturers complete their products with a straight or angular receiver, depending on the model.

If you get a device with a direct entry, we recommend purchasing a brass angle with internal threads and a boundary wall into which a paranitic gasket is inserted. When installing, avoid sharp bends in the hose.

Imported slabs are sometimes sold with 3/8 or 3/4 inch threads at the outlet. There will be no tragedy if you additionally purchase a regular “futorka” adapter for the commensurate threads of your gas hose in advance. IN residential buildings the gas riser is usually laid in one of the corners kitchen area. There is a branch from it for your use; it must be installed gas tap. We will screw or screw our gas hose onto it, depending on what thread the valve is equipped with.

As standard, the gas hose comes with two paronite gaskets. Remember to use them when connecting, this will make it easier for you to ensure that there are no leaks. They also advise using a gasket purchased separately with a fine mesh; experts claim that it will help get rid of various types of contaminants. But we leave this procedure at your discretion, since gas usually flows without mechanical inclusions.

The gas hose is screwed on wrench, but do not overdo it and do not squeeze out the paronitis. After the work has been completed, it remains necessary to carry out a mandatory check for possible gas leaks. It is enough to apply soap suds to the connections; the absence of air bubbles indicates that the work has been done efficiently and the stove can be used. Bon appetit!

Maintaining Basic Safety

  • Basic service requirement gas industry- access to the supply line, so the flexible hose for the gas stove should be within reach;
  • It is not allowed to have third-party connections to the gas stove;
  • The gas hose must be kept clean, embellishment is not allowed, it cannot be coated with paint, or other “improvements” in appearance are made;
  • The eyeliner should have a natural sag. Tension is fraught with a break in the hose, or gas leakage at the points of connection to the fittings;
  • If you plan to move the slab before spring cleaning, calculate the required length of the gas hose in advance. Be sure to close the ball valve before moving;
  • Avoid excessive bending or twisting;
  • It is necessary to protect the metal braid from condensation;
  • Do not weld or solder the connection, use only the threaded joining method;
  • Replace the old gas hose with a new one in a timely manner, in accordance with the service life established by the manufacturer.

We really hope that our review helped you decide and understand which gas hose for a gas stove is best to choose. Now you definitely won’t get lost in the store, since you have learned the specific features and differences between gas hoses. Self-connection will also not take much time if you have the necessary tools.

However, please note that a number of manufacturers do not allow the owner of the equipment to perform such work. One of the requirements is increasingly becoming the condition for connecting devices by specialists of an authorized gas service. Otherwise, there is a risk of losing the warranty. Check in the operating instructions whether you will lose the warranty on the stove if self-connection. If not, we wish you good luck!

We offer you an entertaining video review, where channel 1 recommends which gas hose is best to use at home:

Today, during the construction of buildings, special attention is paid to water supply and gasification systems. They simply must be reliable and provide a high-quality, leak-free supply of water or gas to the end consumer.

For this purpose, various pipeline fittings, but it is equally important to ensure a high-quality connection household appliances and various plumbing equipment on site to gas and water communications. For this purpose, flexible eyeliner has been successfully used for many years. What is a flexible gas line, what is a bellows line, and what types does it come in? Let's try to figure this out.

A flexible hose is a kind of hose with fittings or other elements at the ends for connection to pipeline systems and plumbing itself or household appliances. Using flexible hoses, as already noted, household appliances (washing and dishwashers, plumbing fixtures, faucets, gas stoves) to gas and water supply systems. In this case, not only the supply of the necessary working environment(water or gas), but also ensures the mobility of household appliances - it is possible to move them in such a way that it is most convenient to use them, there is no connection to risers. In addition, the installation process itself is quite simple, convenient and fast, so that problems almost never arise during installation, provided, of course, that a specialist is involved in this - after all, as you know, a gas leak or a water pipe break are serious things that lead to sometimes to irreparable consequences.

All types of flexible connections are divided depending on the type of working medium supplied into water connections and gas connections. However, their differences lie in the materials used to make the eyeliner. The connection for the mixer can be made of ordinary rubber, for example, with aluminum or stainless braid, but for gas connections, other materials are used - special polymer hoses without aluminum in the braid. Also, water and gas connections may differ in the way the “hose” itself is attached to the end fittings - fittings, nuts, fittings: flexible liner for water it is usually connected by rolling, and for gas - by argon-arc welding. But in any case, there may be other connection options that are not tied to the purpose of the flexible liner. However, the main classification of flexible hoses is based on the type of construction, namely rubber hoses (or sleeves) and bellows hoses. Let us consider further in more detail design features each type of flexible liner.

Rubber sleeves

This type of flexible hose is a rubber (rubber) or polymer hose, which, to protect against external influences, is braided quite tightly with metal wires or threads, while stainless steel or aluminum is often used as the braiding material. At both ends of this type of flexible hose, metal bushings or fittings are installed, which in turn are crimped with a metal nut. The tightness and reliability of the rubber flexible hose depends on the quality of the connection between the braided rubber hose and the metal bushings. Therefore, it is necessary to purchase rubber hoses only from well-known, time-tested manufacturers. Note that such gas connections have a low price, affordable to almost all consumers, but at the same time they are significantly inferior in strength and operational characteristics another type of flexible liner - bellows. On the contrary, with regard to the use of water liner in public utilities, then a flexible water supply with a metal braid is today the most widely used, fully meeting all standards for the operation of plumbing.

Bellows eyeliner

A flexible bellows-type hose, in principle, is a metal sleeve made in the form of a corrugation with folds - a bellows metal hose, which allows you to bend and compress the hose without any problems. The bellows liner, unlike its rubber “brother,” wears out much less, is more reliable, and is resistant to mechanical stress and effectively protects household appliances that it connects to the pipeline from damage. Thus, the flexible bellows connection also increases the safety of using household appliances connected to water and gas systems. Naturally, the cost of flexible bellows-type hoses is significantly higher than the price of braided rubber hoses. But you must agree that the advantages described above that bellows eyeliner provides are worth the money. Flexible bellows hoses are becoming increasingly popular and are gradually replacing rubber hoses. For example, the number of sales of bellows gas connections wholesale and retail in Moscow has already significantly exceeded similar figures for rubber hoses in metal braid. Flexible bellows-type gas supply is rapidly conquering the plumbing market.

At the same time, we should not forget that with the growing popularity of bellows eyeliner, the number of low-quality, counterfeit products is also growing. Therefore, as in any other case, when choosing flexible eyeliner, you should pay attention to the reputation of the company producing these products and, of course, purchase flexible eyeliner only from well-known and trusted suppliers, regardless of whether you want to buy flexible eyeliner wholesale or retail. Attention! The use of counterfeit, falsified and low-quality products can lead to tragic consequences. Don't put yourself and the people around you at risk.

The Armagaz group of companies offers to your attention flexible gas connections from the following manufacturers:

Modern a private house, and especially an apartment in apartment building, it is impossible to imagine without gas equipment. This could be a stove, a heating boiler, a heating boiler, or other household appliances.

Gas is supplied to a house or apartment through a pipeline system, and from it to each individual consumer via flexible connections. Flexible gas supply can be made in several versions at once.

Varieties

Flexible gas supply can be represented by three different types in terms of quality, price and material of manufacture. The division into types is carried out according to the material of manufacture. So, the sleeve can be:

  • Rubber, that is, made of rubber, additionally reinforced with thread;
  • Made of steel - rubber, which has a metal braid, usually made of stainless steel;
  • Bellows.

Description of rubber products

The rubber tube is made of rubber, which is completely reinforced with nylon thread. Hoses are usually sold with lengths from 1.2 to 4.

Advice! In this matter, it is better to choose the shortest one, as it will be more durable and reliable. Therefore, if, for example, a gas stove requires a hose 1.3 meters long, then it is better to move the stove a little and purchase 1.2 meters rather than 1.5.

Generally speaking, rubber fabric eyeliners are the softest of all three presented. This quality can be called a disadvantage, since there is no safety margin.

The technical specifications are as follows:

  • Manufactured according to the requirements of TU 23.05765871.01-92 (of course, this is for those materials that are domestic);
  • Capable of withstanding pressure up to 0.05 MPa;
  • Retains its properties and works normally in the temperature range from -10 to +70 degrees Celsius. It should be noted here that this is the one temperature Range, which has no effect on the rubber at all. Rubber liners can work normally even at -50, but at this temperature the rubber becomes less flexible and can easily tear, or rather crack;
  • Has connection dimensions G1/2”.

As for installation and maintenance, there is nothing complicated, there are only a few recommendations:

  • The hose should not be in the fan blowing area (with hot air), in direct contact with gas appliances(of course, except for the connection point) and also near the oven;
  • The tightness of the connection is achieved using special paronite gaskets;
  • During use, the sleeve should not be stretched or bent at very sharp angles;
  • The service life ranges from 7 to 10 years depending on operating conditions.

Stainless steel

Flexible gas lines made of steel are very common today. It is represented by a tube that has a stainless steel braid. The braid has a yellow stripe. In appearance, such tubes are very similar to water products, which instead of a yellow stripe have red and blue.

At the ends of the hose there are two fittings, which, like the braid, are made of stainless steel. The fittings are inserted into the mounting points and secured with special union nuts. In this case, the tightness of the connection is achieved using special washers made of soft metals such as copper and aluminum.

Conditions of normal operation are those under which normal temperature regime(the same as for rubber products), there are no kinks or breaks in the hose, it has no tension.

One of the advantages of such a stainless steel liner is that it is very cheap, while being much stronger and more rigid in relation to rubber-fabric products.

Bellows liner

One of the most expensive and most reliable eyeliners. Made in the form of corrugated metal pipe. There are two fittings at the ends, which are secured using union nuts and sealing washers.

Capable of withstanding pressure up to 6 atmospheric units, despite the fact that normal pressure in the gas supply system the value is considered to be 0.03 atmospheres.

The operating temperature range is from -50 to +250 degrees. Since the bellows is, in fact, corrugated, it is not afraid of stretching. In addition, the bellows hose is capable of stretching up to 3.5 times. A normal stretch is considered to be an increase of 50-70 percent.

The bellows liner has a bright yellow color, and the union nuts and fittings have the natural color of stainless steel.

As for the scope of application, there is only one - connecting the consumer to the gas supply system.

Installation is carried out through a special insert - dielectric. Its purpose is to prevent the spread of electric current through the hose if a breakdown occurs. This insert is mounted between the consumer and the hose.

All gas equipment in the house, including gas heating boilers and gas stoves, are equipped with special fuel supply hoses. As a rule, such hoses are bright yellow.

Working with them yourself is prohibited. Such events should be carried out by special services. But the choice and purchase of this element often lies with the end consumer, so it would not be superfluous to consider what a bellows liner for gas is.

Types of gas hoses

If we consider everything, we can divide them into three large types, which differ from each other in the material of their manufacture:

  • Rubber-fabric elements;
  • Rubber sleeve with metal braid;
  • Bellows liners.

Rubber-fabric sleeves are the softest of all three. Perhaps this quality can be called negative side, since mechanical rigidity is at the lowest level. A big advantage is that rubber products do not conduct electric current.

The most popular today is a rubber hose with a metal braid. The reason for its prevalence and popularity is simple – low cost. A gas hose of this type differs from the same hoses, but for water, only in that there is a yellow stripe on its surface, which can be seen in the photo above.
And this type of water hoses have red and blue stripes. Such an element is shown in the photo below:

The bellows gas connection is the most reliable and rigid of all three types. Moreover, such a sleeve has the highest cost. All regulatory documentation recommends this type of hose. This is due to the fact that such a flexible eyeliner tolerates very well high pressure, created by the gas flow. A flexible bellows-type liner will be shown in the image below.

Advice! Regardless of what type of flexible liner is chosen, its diameter must be greater than 10 mm. This is due to the fact that modern gas equipment is quite powerful, and therefore requires large amounts of fuel to operate at 100%.

About bellows liner

So, briefly about what a bellows eyeliner is was described above. However, this issue should be discussed in a little more detail, since today this type of hose is becoming the most common, despite its high cost.

So, the bellows is a metal corrugated hose, which is made of stainless steel. At the ends of the product there are two fittings, which are also made of stainless steel.

This flexible line is attached to gas equipment or a gas inlet pipe using special union nuts. In this case, a metal gasket must be used (only soft metal is used, that is, copper or aluminum). Special plastic can also be used as a gasket material.

The hose is made of stainless steel with AISI 316 coding. The fittings are made of stronger steel with AISI 304 or AISI 303 coding.

It must be said that some manufacturers from China and Turkey make fittings from carbon steel.

Advice! The best option will be the one where both the fittings and the corrugation are made of the same material. This is due to the fact that welding different materials leads to an electrochemical reaction that destroys the weld. Such a connection will not be strong.

Particular attention should be paid to those pipes in which the fittings are simply soldered with tin or silver to the corrugation. They, like those in which the fittings are simply glued, will not be strong and durable.

As already mentioned, high-quality flexible liner of this type is the most reliable and durable of all existing ones. However, its price is significantly higher. It ranges from 2x to 3.5x the normal magnification rubber hose in a metal braid.

Some technical characteristics

Like any other material, this one has its own characteristics, which can be called its parameters, that is, performance indicators:

  • So, the bellows hose is able to function normally without losing its qualities in the temperature range from -50 to +250 degrees Celsius;

  • This material can withstand pressure up to 6 atmospheres. For an ordinary person, this figure does not mean anything, but if you compare it with the figure indicated in regulatory documentation, then the appropriate conclusions can be drawn. So, according to SNIP, the pressure in the gas supply system should not exceed 0.03 atmospheres - so compare these two indicators!
  • Elongation can reach 100%. This means that a bellows that has undergone the annealing procedure can be stretched, up to twice its size. However, this is not recommended, since the rigidity is significantly reduced. The maximum elongation should not exceed 50 percent.

Scope of application and connection diagrams

The flexible hose has only one area of ​​application - connecting stationary and mobile gas equipment to the gas supply system.

The service life of a standard hose is approximately 15 years. When installing it, it is recommended to use special gaskets called dielectric inserts. They prevent the flow of electric current and reduce the likelihood of breakdown. An example of such a dielectric insert is shown in the image:

Thus, the connection diagram will look like this:

  • Gas supply system pipe;
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