Flexible rubber yellow gas hose. We select a gas hose for connecting a gas stove or boiler. How long are gas hoses

Tsugunov Anton Valerievich

Reading time: 6 minutes

Not so long ago, the owners did not even have a question about which hose for gas stove choose. In Soviet times, these household appliances were tightly connected with steel pipes to the gas pipeline. It was simple, reliable, safe, but inconvenient: the plate could not be moved even a millimeter after installation. With the advent of a new product, it became possible to attach the stove with a flexible hose, so that the device can be rearranged or temporarily moved if necessary.

Expert opinion

Tsugunov Anton Valerievich

Hello, friends!

Never use gas hoses without appropriate markings, permission from Rostekhnadzor of Russia for their use, as well as certificates of conformity to SNIP and GOST. A flexible hose passport is required, which indicates the date of manufacture, service life and replacement of the hose.

It is advisable to check with the gas company in your city in advance about specifications, presented to the methods of connecting gas stoves. This may refer to the maximum length of the eyeliner, how it is fastened and the materials from which it must be made.

Requirements for gas hoses

Flexible eyeliner- this is a complete product, any connections (couplings, extension cords) are not allowed. It is impossible to make one from two hoses.
The hose must be oil resistant and not corrode.
It is imperative that the hose match the parameters of the gas used.
Access must be provided to the flexible piping (it must not be placed in boxes, strobes, etc.).
Use hoses with a service life of at least 10 years.

Maximum allowable length piping is specified by the manufacturer of the gas stove. For example, the European standard: EN14800:2003 - two meters. The maximum length of the certified gas hose is 7 meters.

There are no direct instructions on sizes in GOST!

How long are gas hoses?

The most common eyeliner sizes are as follows (in centimeters):

Hose types

Today, several types of hoses are used to connect a gas stove:

oxygen;
rubber-fabric;
rubber reinforced;
rubber with a metal braid;
reinforced with PVC;
bellows.

It is worth considering them in more detail before choosing the right one.

Oxygen

Oxygen hoses were often used in Soviet times, since there were simply no other options for connecting through a flexible hose. Now this product is fading into the background. Cost - from 60 rubles per linear meter without tips.

Positive traits:

the ability to withstand high pressure (up to 20 atmospheres);
ease of installation;
cheapness;
does not conduct electricity;
can be selected for any pipe diameter.

For the rest - a good option for having its own advantages:

high level of electrical insulation;
wide range (easy to find for any pipes);
due to its softness, it is effortlessly cut to fit the existing conditions.

You can install the product yourself, but it is better to contact a specialist.

With metal braid

Has an optimum ratio of the price, quality and durability. Price from 140 rubles per 60 cm finished product. The hose is made of vulcanized rubber and reinforced with textile thread. The outer part is a metal braid.

The gas hose is similar to the plumbing (toilet, faucets, shower). You can distinguish it by marking: plumbing products have blue and red marks for cold and hot water, a yellow thread is woven into the braid of gas.

One of the most common options, the popularity of which is associated with many positive qualities, including:

high level of reliability;
ease of installation;
longer service life compared to rubber products;
a large selection of lengths and diameters;
the allowable temperature has a wide range from -35 to + 50 degrees;
unpretentiousness in operation.

It is forbidden to use the product without installing a dielectric insert!

Expert opinion

Tsugunov Anton Valerievich

Master-universal, since 2003 I have been engaged in the repair and decoration of premises, more than 100 completed objects. I value quality more than quantity!

Gas services often recommend replacing old metal-braided hoses due to the inability to check the condition of the rubber under the braid. If it is impossible to confirm the relevance of the period of use of the product passport, then I recommend replacing the eyeliner with a bellows or reinforced with PVC.

PVC reinforced

PVC gas connection is one of the latest developments. It does not conduct electricity, does not break down like rubber, and is almost as durable as bellows hose. It has 2 layers: black PVC inner and yellow PVC outer. Due to the novelty, not all gas services accept them for operation, so it is better to consult with an authorized organization in advance. The price for 60 cm of the product is from 140 rubles.

Properties of reinforced PVC hoses:

slow-burning;
dielectric;
withstands the hot plate contact test;
quite cheap with a comparable service life;
resistant to oil mist;
operated under conditions of increased loads;
meets the requirements of GOST R 52209-2004, GOST12.2.063-81, GOST12.2.003-91;
warranty period of service - 12 years, real service life - more than 20 years;
length from 60 cm to 5 m.

The bellows hose is made from of stainless steel top with PVC coating. This ensures that it will last a long time: the average life is 25-30 years. The metal braid reliably protects against mechanical influences, and the PVC coating provides electrical insulation and resistance to chemicals. Due to the corrugated surface, the product bends easily.

Bellows gas hose has the following advantages:

can be connected to any gas equipment: stoves, boilers, etc.;
has connecting dimensions 1/2″, 3/4″, 1″;
has excellent flexibility;
withstands pressure up to 6 atmospheres;
a wide range of operating temperatures: from -50 to +250 degrees (installation on the street is allowed, nothing will happen to it when it comes into contact with hot surfaces);
able to withstand mechanical stress, aggressive impact environment, household chemicals;
hoses comply with the requirements of GOST R 52209-2004, GOST12.2.063-81, GOST12.2.003-91;
warranty period - up to 15 years;
service life - up to 30 years;
is able to ensure the tightness of the system even under extreme loads, for example, during an earthquake.

The length of the bellows gas hose varies depending on the manufacturer.

At "Emiflex" eyeliner can increase in size by 2 times and has the following parameters (in meters):

from 0.26 to 0.52;
from 0.5 to 1.0;
from 0.75 to 1.5;
from 1.0 to 2.0.

And Eliteline hoses have a fixed length (in meters):

The only thing that can scare off a buyer is the price. But given its durability, it is the most profitable purchase.

Do not use the hose without installing a dielectric insert!

Rules for choosing a gas hose

Some simple tips help you choose a gas hose, save time and money and avoid energy leakage troubles:

Buy any products only in specialized stores, and do not forget to ask the seller for a quality certificate.
You can not buy Chinese hoses: they are thin and quickly become unusable. There are also many fakes.
Plates are connected only by those sleeves on which there is a special yellow mark. You can not replace them with plumbing. The latter are not designed for such loads and wear out in a few weeks.
When buying an eyeliner, you need to carefully inspect for damage.
Choose the size so that the product sags, and does not stretch.
Pay attention to the mounting methods - fitting or nut - select them according to size.

When installing the hose, follow these guidelines:

The sleeve must be laid in an easily accessible place. Hiding it in a wall or under the floor is unsafe.
The bending radius must not be less than three times its diameter.
The product must not be stretched, twisted, bent, or painted.
Metal parts must be protected from condensation, which leads to the oxidation of the material.
It is impossible to connect steel elements (tips) with copper ones, this is fraught with electrolytic damage to the product. Permissible combinations are steel with steel, brass with copper.
Tighten all connections tightly, but without excessive force, so as not to damage the threads.
A dielectric insert is installed between the tap and the gas hose, which prevents the accumulation of stray currents, which can lead to overheating of the braid, breakage of the device, melting of rubber.

Service life of the gas supply

After installing the hose, you should clarify the duration of its service life and remember the date of installation. The product, depending on the type, is designed for a period of 5 to 15 years. It is important not to forget to replace it in time.

Guaranteed service life is indicated in the product passport and in the certificate of conformity.

rubber hoses (with and without sheath) - 5 year warranty, service life up to 10 years;
PVC eyeliner - 12 years warranty, lasts up to 20 years;
bellows gas hose - 15 years warranty, does not require replacement up to 30 years.

Which gas hose is best?

In terms of the ratio of technical characteristics and cost, the leader is the bellows gas hose, it is not in vain that the gas workers themselves recommend it. Don't forget to install the dielectric insert with this product!
Next comes the PVC gas hose, it is less durable, but does not require electrical protection, and is not destroyed by oil.

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

For this, various pipe fittings, but it is equally important to ensure high-quality connection of household appliances and various plumbing equipment on site to gas and water communications. For this, flexible piping has been successfully used for many years. What is a flexible gas liner, what is a bellows liner, and what is it like? 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 piping systems and plumbing itself or household appliances. With the help of a flexible connection, as already noted, household appliances are connected (washing and dishwashers, plumbing, faucets, gas stoves) to gas and water supply systems. At the same time, not only the supply of the necessary working medium (water or gas) is carried out, but also the mobility of household appliances is ensured - it is possible to move them in such a way that it is most convenient to use them, there is no binding to risers. In addition, the installation process itself is quite simple, convenient and fast, so installation problems almost never arise, provided, of course, that this is done by a specialist - 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 piping are subdivided, depending on the type of working medium supplied, into water piping and gas piping. At the same time, their differences lie in the materials used to make the eyeliner. The faucet connection can be made of ordinary rubber, for example, with an aluminum or stainless braid, while other materials are used for the gas supply - special polymer hoses without aluminum in the braid. Also, water and gas connections can differ in the way the “hose” itself is fastened with end fittings - fittings, nuts, fittings: a flexible water connection is usually connected by rolling, and 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 by type of construction, namely rubber hoses (or sleeves) and bellows hoses. Let's consider further in more detail design features each type of flexible hose.

Rubber sleeves

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

Bellows liner

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

At the same time, do not forget that with the growing popularity of bellows liner, the number of low-quality, counterfeit products is also growing. Therefore, as in any other case, when choosing a flexible hose, you should pay attention to the reputation of the company that produces these products and, of course, purchase flexible hose only from well-known and trusted suppliers, regardless of whether you want to buy flexible hose in bulk or retail. Attention! The use of counterfeit, counterfeit and low-quality products can lead to tragic consequences. Do not put yourself and those around you at risk.

Group of companies "Armagaz" brings to your attention a flexible piping for gas from the following manufacturers:

The bellows gas connection is one of three types of flexible hoses for connecting to gas appliances that have replaced the steel pipe. Movable flexible hoses also include rubber-fabric and reinforced hoses, which, unlike steel pipe, became not only easier to install, but also made it possible to move gas appliances in the kitchen for the period of cleaning or repair.

A stainless steel bellows hose is used to connect a gas boiler or column. It is also possible to connect a gas stove with it, but when using a special one.

I propose to consider in detail the advantages and disadvantages, the material of manufacture and application, reliable manufacturers, as well as the features of connecting a flexible bellows hose to a gas boiler, column or.

Features of the use of bellows hoses for gas

All currently used flexible hoses are made of different materials, have different specifications and service life, but at the same time they have common positive traits:

- ease of installation;
- ease of installation;
- ease of use.

Types of bellows hose for gas

The bellows hose for gas is recognized as the most convenient and safest of all types of flexible hoses. This gas connection is made of stainless steel and polymers with corrugated top layer. Due to the fact that the material contains wire, the hoses can withstand high pressure (up to 6 atmospheres).

Bellows gas hoses have the property of retaining their elasticity and original strength despite the fact that they are constantly compressed or stretched in length. For connection to gas equipment, bellows hoses use a fitting or a threaded nut made of brass.
There are several types of bellows hoses:

- simple, having a circular cross section;
- hoses protected by a metal sleeve;
— hoses with a polymeric covering;
- a modernized hose with a valve that works to shut off the gas (when the temperature rises to high values).

How to choose the right gas bellows connection for a boiler or column

What should I pay attention to when buying a hose? The most important condition not to make a mistake when buying is to visit a specialized store where competent consultants will help you choose a high quality product, and not a cheap Chinese fake.

Any gas equipment in a house or apartment is a subject of particular risk. Wrong choice can lead to different situations, up to an explosion.

The first thing you should clarify with the seller is the type of hose connection. Immediately discard the option where the corrugation is glued to the hose, this type of product will not last you long. The hose body must be either welded or one piece.

Gas boiler connection with 3/4′ flexible bellows hose

Any bellows eyeliner has at the ends threaded connection for connection to gas appliances. These connections differ in thread diameter and are:

— ⌀ 15 mm or 1/2′;
- ⌀ 20 mm or 3/4';
— ⌀ 25 mm or 1′;
— ⌀ 32 mm or 1 1/4′.

Usually wall and floor gas boilers for their part, they have a threaded fitting with a diameter of 1/2' or 3/4'. Therefore, the bellows hose must be selected with the same diameter as the gas fitting on the boiler or gas water heater.

For example, for wall-mounted gas boilers "" or "" you need a bellows connection with a diameter of 3/4', and a "bellows" with a diameter of 1/2' is suitable for a floor-standing gas boiler "Conord" or "Mimax".

Bellows liner made of stainless steel "nut-nipple"

In addition, there are internal or external threads at the ends of the hose. There are two types of attached threads for gas supply:

- “nut-nut” (both internal threads);
- "nut-fitting" (one end with an internal, the other with an external thread).

Therefore, when choosing a hose, you need to know which thread is on the gas appliance and which is on gas pipe(faucet). If the diameters are different, then this is solved by purchasing a threaded adapter, for example,.

Manufacturers and prices

Bellows hoses for gas in our market are represented by such well-known brands as Hudrosta, Lavita, Emeflex, Beka and others. But now, due to the growth of the foreign exchange rate, we are looking for analogues of these products, manufactured by domestic firms and well-established in our market.

These companies include, first of all, the TuboFlex campaign, which produces bellows hoses for gas at the Uglich Polymer Plant. Consider several examples of different lengths, connection methods and prices.

Tuboflex bellows hose

The bellows hose for gas "TuboFlex IS 100668" is suitable for gas stoves, boilers, water heaters, and for other equipment with a gas supply system. This hose has a flexible design, long service life. Made of stainless steel, protected against mechanical damage. Hose length 2 meters, nut thread half an inch, weight 310 g, nut-nut connection method, dimensions 240x330x35 mm. Price 667 r per piece.

Bellows hose for gas "TuboFlex IS 100692": thread - 1/2 inch; length - 2 meters; weight 310 g; dimensions: 240 x 330 x 50 mm; connection method "nut-nipple". The price of the goods is 771 rubles. a piece.

Advantages of bellows gas hoses:

— reliability;
- safety;
— flexibility of the structure;
- sufficient density;
- ability to withstand temperatures from - 50 to + 280 ° C;
- ability to withstand high pressure;
- the ability to stretch in length by 2 times;
- the ability to connect to any gas appliance;
— long term operation.

Disadvantages of bellows gas supply:

- formation of microcracks on the surface over time;
- the need to install a dielectric coupling when connecting a gas stove with electric ignition;
- high price compared to other types of hoses.

As for the work and installation of connecting a flexible bellows hose to a gas boiler or water heater, only a professional should do this. Therefore, we do not give any recommendations to those who believe that any master can easily handle this. Any gas equipment must be connected by a specialist who has a permit for this type of work. And here it does not matter what type of hose will be used: bellows or oxygen. Let's watch the video.

Responsible moment in operation gas equipment is its connection. Therefore, it is worth taking seriously not only the connection process itself, but also the choice of gas hoses that allow this to be done in practice. In this case, it must be borne in mind that in this case it is necessary to use special eyeliners, known as bellows hoses.

What the bellows itself is can be read in detail on Wikipedia. To connect gas equipment, flexible hoses are used, which are bellows hoses, which ensure the tightness of the connection. In terms of the design of these connections, bellows-type hoses can be characterized as follows:

With regard to the specific use of bellows gas hoses, they find their application in connection of almost any type of gas equipment: mobile and permanently installed.

How to choose the "right" bellows hoses?

Bellows hoses are quality products, unless of course you buy cheap products of this type from China. At the same time, their purchase is associated with some problematic choice, which is associated with the presence of gas connections on the market. various types. There is a wide variety of such elements, so it is necessary to take into account some important points when choosing bellows hoses:

Manufacturers

EMIFLEX S.p.a. - a company from Italy, which occupies a leading position in Europe in the production of gas supply. The bellows hoses of this manufacturer are certified in Russia by an organization such as Rostest. There is also a corresponding permit for this product from the Gosgortekhnadzor of the Russian Federation. Specifications EMIFLEX branded bellows connections are as follows:

The norms existing in Europe limit the length of the gas supply to two meters, and for the production of a metal hose, only AISI 316 L stainless steel is used.

Another popular manufacturer from Italy is IDROSAPIENS S.r.I. Its products are certified in the Russian Federation and fully comply with EN 14800 (Europe) for gas bellows. The IDROSAPIENS gas connection is designed for a service life of up to 15 years, which is not final, since further operation of the bellows is quite possible, which is due to the technical condition of the product at the time of the end of its operational period under warranty.

If you are interested in budget models of bellows hoses, then you should turn to products from Belarus, certified in the Russian Federation, which are produced by ZURFLEX. The quality of the products of this brand is quite consistent with the Italian products of this type, but they can be bought much cheaper.

counterfeit

If the product is popular, then it is usually counterfeited, and the place of production of counterfeit products is mainly China. Bellows hoses are no exception in this case.

At the same time, it is worth dividing Chinese hoses for gas equipment into two categories. The first category includes those products that are officially produced in China by order of companies from Europe interested in reducing the cost of their goods. Everything is fine here with the quality.

At the same time, there is a second category of gas supply, produced in a pirated way, which has a catastrophic effect on its quality. Counterfeit products of low quality reduce the level of security, as their use can lead to gas leakage. Also, the possibility of the presence of harmful chemical or radioactive substances in these products is not ruled out.

If earlier the measure of quality was the price, now everything has changed. The original and fake may well cost the same, so you need to be especially careful when buying a gas supply. Conduct a visual inspection of the product and require certificates at least in the form of their photocopies. If these documents are refused, then do not risk buying bellows hoses from this seller.

Installation rules

Hose drawing

Gas equipment in the house, which includes stoves and gas heating boilers, are equipped with fuel supply hoses. Most often they are painted in a bright yellow color. It is forbidden to work with them independently, such events are carried out by special services. But the choice and purchase of this element often lies on the shoulders of the end user, so it is important to consider what a flexible eyeliner is.

Varieties of gas hoses

If we consider it, we should divide them into three varieties, which differ from each other in the material of manufacture. Thus, bellows eyeliners can be found on sale; rubber sleeves, which are supplied with a metal braid; as well as rubber-fabric elements. Flexible eyeliner based on rubber-fabric sleeves is the softest, this quality can be called negative, since the mechanical rigidity is at a minimum level. The advantage is that rubber products are not able to conduct electricity. Metal-braided hoses are more common today among consumers. The reason for this popularity is expressed in low cost. Such a gas sleeve differs from water connections in that a yellow stripe can be found on its surface. The bellows-type flexible hose is characterized by maximum rigidity and reliability among other types of hoses. For such a product, you will have to pay the highest cost, the regulatory documentation recommends the installation of products of this type. This is due to the fact that such a material perfectly copes with the impact high pressure, which is created by the gas flow.

What you need to know before installation

You can choose a flexible eyeliner with certain characteristics, but in any case, the diameter should be more than 10 millimeters. This is due to the fact that modern gas equipment has a high power, therefore, it requires high fuel costs for efficient operation.

Installation rules

Before proceeding with the installation of a flexible gas supply, it is necessary to shut off the gas pipeline. If we are talking about installing new gas equipment, then you must first dismantle old appliance, if necessary. At the next stage, a gas hose is installed, the master must check the tightness of the existing connections, which will help eliminate the possibility of gas leakage. The new device is installed on the surface according to the level, and then a performance check is carried out.

When installing a flexible gas piping, it is important to follow some rules, one of them is to install the equipment at a distance of 4 meters or less from a rigid gas pipeline. There must be a dielectric insert between the flexible hose and the gas cock. For flexible supply of household gas equipment, all three types of hoses, which are also called sleeves, can be used. Rubber-fabric provide the highest degree of safety of gas equipment. On the pipe through which the gas will flow to residential building, a positive electrical potential is applied. This is necessary so that the pipe, which is in the soil, does not corrode. At the entrance to the dwelling, the pipe has a dielectric insert, and the risers are not under potential.

When a flexible gas line is installed, one cannot ignore the possibility that current will flow through the bellows or metal braid that is at the base of the rubber hose. This can be dangerous for a sleeve that is equipped with a braid. The cross section of the wire is very small, this indicates that it will be high. In this case, you need to be afraid that the hose sheath will heat up in a spiral type. When a flexible faucet hose is installed, it is recommended to use a real dielectric insert. Most often it is made of plastic or has a metal thread on both ends. Experts advise to purchase a bellows metal hose with yellow dielectric insulation, which is applied over the metal. It is best for the consumer to forego the bare sleeve. Manufacturers apply the coating for aesthetic reasons to make the surface of the hose easier to clean. However, thanks to electrical characteristics of this coating, it prevents the occurrence of current in the sleeve if it touches the riser.

The nuances of the installation work

It is worth remembering that a flexible gas supply must be installed only by specialists. The bending of the hose should be excluded, but if such a need arises, then it is necessary to ensure that the radius does not reach the minimum level established by the documentation. Before the nuts are connected to the consumer, the wiring must be configured to the required configuration. The wiring should not be bent in a section that is closer than 7 centimeters from the union nut. This is true if it is connected to a gas appliance. In no case should the flexible reinforced hose be stretched; twisting of the hose should be avoided. If there is a need for application, then they should be operated exclusively with flat gaskets. In order to exclude the possibility of a breakthrough of the gaskets, do not overtighten the nuts. If damage was noticed, then a complete replacement should be carried out.

What else you need to know about bellows piping

Flexible today you can be purchased at the relevant goods store, this also applies to the bellows eyeliner, which, although expensive, has found its distribution among consumers. This product is a corrugated hose made of stainless steel. At the ends are fittings made of stainless steel. Such a connection must be fixed to the gas inlet pipe or equipment with union nuts. Be sure to use metal gaskets, which should be soft, this should include aluminum or copper. Special plastic can also be used as a material for the gasket.

Such a flexible hose from can have a corrugation and fittings made of different material. However, experts recommend purchasing products that are completely made from the same base. This requirement is due to the fact that welding of different metals can cause an electrochemical reaction, which contributes to the destruction of the weld. Such a connection cannot be called strong.

Conclusion

Experts recommend paying special attention to those pipes in which the fittings are soldered with silver or tin. They will not be as durable as those in which the fittings are glued. The bellows eyeliner is capable of withstanding pressure up to 6 atmospheres, and the elongation of the product can be 100%, which indicates that the bellows can be safely stretched during installation work up to a twofold increase.