Fire hoses are a flexible pipeline made of tarpaulin (synthetic fabric) and impregnated with a special compound. Fire hoses are used to supply water (foaming agent solutions) under pressure. The working pressure for which fire hoses are designed is at least 1 kgf/cm² (0.1 MPa).

To increase strength, water resistance and protect fire hoses from exposure to aggressive environments (acids, alkalis, petroleum products, extreme temperatures), a rubber (polymer) coating is applied to the inner surface of the flexible pipeline. On the outside, metal reinforcement is used for reinforcement.

Fire hoses have connection heads that provide a quick and reliable connection. They are needed to connect hoses to hydrants, fire nozzles, motor pumps, foam generators, hydraulic elevators, etc.

Also, with the help of connecting heads, the hoses can be connected into one line - this is used if the distance over which water must be supplied exceeds the length of one fire hose.

The reliability of the head connection is ensured by the presence of two grips located diametrically and a rubber seal. When connecting two heads, both gaskets, under water pressure, expand and form a tight connection. This design eliminates the possibility of spontaneous uncoupling of the connecting heads.

According to their purpose and method of use, fire hoses are divided into pressure, suction and pressure-suction.

Pressure fire hoses

Designed to move water or fire extinguishing agents under pressure to the source of the fire. They are connected to fire hydrants or motor pumps, as well as to tank trucks or other mobile fire fighting equipment.

Types of pressure fire hoses

There are rozhar sleeves with a reinforcing frame made of natural and synthetic materials. Cotton, linen and flax-jute fibers are used as natural materials.

Synthetic materials include rubberized and latex hoses (with an internal layer of waterproofing), polymer hoses with double-sided coating and pressure up to 3 kgf/cm2 (3.0 MPa).

Depending on the climatic zones, two types of fire hoses are used. When the ambient temperature ranges from -40 C to +45 C, hoses in the “U” version are used, and if the temperature ranges from -50 C to +45 C, the “UHL” version is used.

The pressure fire hose has a length of 20 m, with a diameter of 51, 66, 77, 89, 150 mm.

Design Features

When using fire hoses made of linen or cotton, the outer surface of the cover is moistened due to water seepage, which increases heat resistance in fire conditions. But on the other hand, this leads to large losses of water and causes difficulties during operation in conditions of negative temperatures.

In a rubberized pressure fire hose, a rubber chamber attached by vulcanization is used as the inner layer of waterproofing.

For a latex sleeve, in addition to the internal waterproofing made of latex, the reinforcing frame is impregnated with the same material. Latex film protects the outer layer.

Pressure fire hoses have a two-layer design, have internal waterproofing and an external protective polymer coating. This design minimizes water loss and also protects the reinforcing fabric from damage and the effects of solar radiation.

Suction hoses

They are used to collect water from open reservoirs and supply it to the pumps of motor pumps or tankers. Water suction occurs due to the creation of vacuum inside the sleeve.

Types of suction hoses

Depending on the working environment, fire trucks are equipped with suction hoses of classes “B” (water) and “KShch” (weak acid-base solutions).

Depending on the operating conditions, suction hoses are divided into two groups:

To take water (by creating a vacuum) from open sources water;

For operation both in partial vacuum and under pressure.

The suction hoses are 4 meters long. This is determined by the size of the canisters on fire trucks. While the machine is moving, the sleeves are partially dried by blowing air.

The inner diameter of the sleeves ranges from 25 to 300 mm; cuff length - from 75 to 200 mm.

Design Features

Inside the sleeve there is a rubber chamber, on top of which two textile layers are applied, then a wire spiral and an intermediate layer of rubber are installed, and finally an outer textile layer. Rubber layers provide elasticity, water and air tightness. Thanks to the wire spiral, the strength of the sleeve increases.

The spiral does not reach the end of the sleeves, so soft cuffs remain. They are needed to tie the sleeves onto the connecting heads and secure them with galvanized wire or clamps. On the surface of the cuff there is a marking consisting of technical parameters sleeves

Suction and pressure hoses

They combine the functions of water suction by creating a vacuum and supplying water (or solutions) from a source under pressure.

By their design, pressure-suction hoses are practically no different from suction hoses and are their variety. They are transported in the same special cases on fire trucks.

The diameter of the sleeves ranges from 25 to 300 mm; cuff length - from 75 to 200 mm; the degree of vacuum reaches 0.085 MPa; pressure - from 0.35 to 1.10 MPa.

Operation of fire hoses

To increase the operating time of fire hoses, it is necessary to follow a number of simple rules. After using the sleeves winter time, they must be brought into a warm room to thaw. To speed up the process, the sleeves can be placed in a bath of water and covered with lids.

After thawing, firefighters wash the hose of contaminants and dry it, then conduct an external inspection for damage. Depending on the inspection results, the hoses are sent for testing or repair. Repairs can be made by vulcanization or using special glue.

If the operating rules are followed, fire hoses will remain a reliable means of extinguishing fires.

Industrial marking of fire hoses

Marking of suction and pressure-suction fire hoses contains:

1. Name of the product manufacturer or its trademark.

2. Fire hose class:

Class B - designed to work with substances such as gasoline, diesel fuel, kerosene, petroleum-based oils;

Class B - used for working with contaminated (process) water;

Class G - necessary for working with various gases;

Class KShch - required for working with weak solutions of various inorganic acids and alkalis;

Class P - for working with food substances (beer, milk, wine, drinking water, etc.)

3. Group:

Fire suction hoses;

Fire suction and pressure hoses.

4. Diameter, mm.

5. Pressure (working), MPa.

6. Length, m.

7. Date of manufacture of the product: month (quarter) and year.

8. Designation of the standard (GOST indication).

9. Technical control stamp.

Marking of pressure fire hoses contains:

1. The name of the product manufacturer or its trademark;

2. Pressure fire hose type;

Depending on the purpose of the configuration:

. (RPM) - for equipping fire engines;

. (RPK) - for equipping fire hydrants: (RPK-N) - external and (RPK-V) - internal. Depending on the materials of the product construction:

. (D) – fire hose with a double-sided polymer coating;

. (P) – a fire hose that has internal waterproofing and impregnation of the frame;

. (B) - fire hose with internal waterproofing.

3. Diameter, mm;

4. Pressure (working), MPa;

5. Hose length, m (only for RPK type hoses);

6. Special version (if available);

According to their resistance to various external influences, fire hoses of general and special design are distinguished. Sleeves of special design, in turn, are divided into:

. (I) – wear-resistant fire hoses;

. (M) – oil-resistant fire hoses with increased resistance to various oils and petroleum products;

. (T) – heat-resistant fire hoses with increased fire resistance when in contact with hot surfaces.

Percolated fire hoses are provided with heat resistance by moistening the entire length of their outer shell with fire extinguishing agents (water, foaming agents, etc.) transported under pressure. The purpose of percolated pressure fire hoses is to extinguish fires when it is necessary to lay fire hoses over surfaces heated to significant temperatures (smoldering coals, peat bogs, etc.)

7. Climatic modification, for operation in areas:

8. Date of manufacture of the product (month, year).

Marking must be applied in a way that ensures the safety and readability of the inscriptions throughout the entire service life.

The supply of various types of fire extinguishing agent by emergency rescue units of the Ministry of Emergency Situations would simply be impossible without fire hoses. Fire hoses are an integral element of the fire-technical equipment of any department.

Firehose- this is a flexible pipeline intended for transporting fire extinguishing agents, equipped during operation in the crew of a fire engine, as well as as part of a fire hydrant, with fire connecting heads.

With the help of fire hoses, firefighters can transport water and powder to any necessary point in an emergency situation or fire.

At their core, fire hoses are the same pipeline (dry pipe) with, only flexible, so they are also characterized by pressure losses (which must be taken into account) and other laws applicable in hydraulics. But that’s not about that now.

Today in the CIS countries there are three types of fire hoses, namely (more details by clicking):

• suction;
• pressure suction;
• pressure

Suction

A suction fire hose is a hose of a more rigid design with a target application that is practically no different from pressure-suction hoses.

Designed to collect water from a water source using a fire pump and transport it for fire extinguishing.

What distinguishes suction hoses is a more reinforced hose design, which consists of:

• internal rubber chamber;
• two textile layers;
• wire spiral;
• an intermediate rubber layer and an outer textile layer.

The length of suction fire hoses, as well as pressure hoses, is standard and depends on the design features of fire trucks, as a result of which the length of the suction hose (pressure-suction) is 4 m.

This type of hose is located in canisters on the roof of the AC (which is typical for domestic cars), on modern foreign brands, as well as some domestic ones, the pencil cases are already located directly at the level of the pump compartment, which is much more convenient.

Pressure and suction

Pressure and suction hoses are designed for collecting water from water sources and other fire-fighting water supply systems using a fire pump and transporting them for fire extinguishing needs.

Since a vacuum must be created in the hose cavity to collect water, the main design feature This type of fire hose consists of a metal frame made of steel wire covered with a rough textile casing.

Suction and delivery hoses are produced with diameters from 50 to 200 mm. Smaller diameter sleeves

Since the hoses have a rigid structure and a sufficiently large diameter, for a better connection between themselves and the car pipe, it is necessary to use wrenches of the K-80, K-150 type, where the value corresponds to the nominal diameter of the hose. They are mainly used for pumping special liquids, such as foaming agent, oils, etc.

Pressure

The name “pressure fire hoses” speaks for itself (same in principle with all other hoses), that is, these are hoses through which the fire extinguishing agent is directly supplied to the fire nozzle (under a pressure of about 2-8 atmospheres) and then for extinguishing through.

In other words, the definition sounds like this - intended for transporting fire extinguishing agents under excess pressure for fire extinguishing.

Pressure fire hoses are the most common type of fire hoses, since such hoses mandatory fire-fighting tankers, fire-fighting trains and ships, fire-fighting crane kits are equipped, and they have found their wide application in other areas of human activity.

As was said, pressure fire hoses are located in the AC, pre-wound in a single or double roll; there are storage options on a special reel.

Classification

by type

according to manufacturing materials

Like all technical equipment and rescue tools, pressure fire hoses must comply with GOST.

According to regulatory documents Pressure fire hoses must be classified according to:

Resistance to external influences:

• wear-resistant (I);
• oil resistant (M);
• heat-resistant (T).

Climatic design for operation in areas with:

• tropical;
• moderate (-40˚С to + 45˚С);
• cold climate (-50˚С to + 45˚С).

Exploitation

Includes the following activities:

• commissioning fire departments and equipping fire hydrants;
• use in fire fighting;
• Maintenance;
• repair;
• storage.

Additional material:

Performance characteristics

Fireman's hoses– designed for transportation of explosives under excess pressure. Fire hoses are divided into the following three types:

• pressure, 20 m (Diameter: 51, 66, 77, 89, 150 mm);
• suction, 4 m - for collecting water from the open. water source (diameter: 125 mm);
• pressure and suction, 4 m – for collecting water from the steam generator (diameter: 77 mm).

From the table you will find reference data: throughput, capacity and volume of the hose, resistance, pressure loss, operating and test pressure, mass (weight), flow rates and speed of water movement.

Thus, the technical execution of the sleeves will be different. Pressure hoses of the 70-80s of the XX century were made of flax, which of course was very inconvenient, since they had to be dried, they were very difficult to repair and were quite heavy and not compact.

Today, pressure hoses are made of multilayer synthetic materials (lavsan, nylon) with a rubberized backing; the outer side of the hoses is also covered with special wear-resistant polymer coatings.

They mainly use hoses with a diameter of 38,55,66,77,89,150 mm.

The standard length of the pressure hose is 20 m.

In pressure fire hoses, one of the most important parameters is the throughput of the hose, which will depend primarily on the diameter, as well as the volume of the hose itself.

Question: how many liters of water are in the sleeve, see the table:

Question: what is the capacity of the hoses, see the table

It is very important to take into account the throughput of the hose when organizing fire extinguishing, since the required intensity of supply of fire extinguishing agents to the source of fire will depend on this.

Markings on fire hoses

The hoses received by the fire department are coated with additional marking their belonging to the fire department. On hoses that belong to a fire department, the marking consists of a fraction, where the numerator indicates the number of the fire department, and the denominator indicates the serial number of the hose.

Marking order

Fire pressure hoses “Standard”– designed for mobile fire fighting equipment for the purpose of supplying water and aqueous solutions of foaming agents over a distance under pressure. Standard fire hoses differ from Universal fire hoses in their frost resistance down to -55°C.

Sleeves "Technolen", are used to complete mobile fire fighting equipment and motor pumps with a working pressure of up to 1.6 MPa, frost-resistant, wear-resistant, repairable with a rubber inner chamber.

Latex sleeves(latex hose) with an internal waterproofing layer made from natural latex, used to complete mobile fire fighting equipment and motor pumps with a working pressure of up to 1.6 MPa.

Fire pressure hoses rubberized "Armtex"(double-sided polymer coating) are intended for mobile fire fighting equipment and motor pumps, with an operating pressure of up to 1.6 MPa, supply of water and aqueous solutions of foaming agents with a hydrogen pH of 7-10. under pressure at a distance in the operating temperature range from minus 400C and in areas with a temperate climate (version U). Increased wear resistance, resistance to aggressive environments (oil, gasoline).

Prevention of fistulas in hose lines

To temporarily eliminate leaks in places where pressure fire hoses are damaged during fire extinguishing, it is necessary to equip the hoses in the combat crew with two cuffs 25-30 cm long (hose sections of the same diameter).

To avoid hose ruptures from hydraulic shocks, water should be supplied to the hose line by gradually opening the valves of the pump pressure pipes and branches. It is forbidden to sharply increase the pressure in the pump, or to suddenly shut off the barrel.

When calculating the pressure, the following losses are accepted: per 1 atm. to branches; 1 atm. 10 m in height (residential building - 3 floors); 1 atm. 100 m horizontally.

Additional material

Hello, dear readers, who are concerned about compliance with standards and fire safety requirements. Did you know that at least 85% of all fires are extinguished using fire hoses? It is a fact.

Therefore, it is natural that special attention is paid to their production and operation. This means that you and I should approach the choice of this fire extinguishing agent thoughtfully and purposefully. In addition to other technical characteristics, the diameters of fire hoses play an important role.

It is this indicator, more precisely, its identity with the size of the outlet openings of fire hydrants, motor pumps, etc., you will agree, which primarily ensures the functioning of the entire system.

Of course, the laudable desire to comply with regulations is usually motivated by two factors: the desire to avoid incurring the righteous wrath of the fire inspector and, indeed, concern for one's own safety.

In both cases, the selection of the correct fire hose diameter must be approached carefully. And then the inspector comes, looks into the fire closet, and there is a 2” (inch) fire water supply pipe, a PK-50 tap, and a 66mm hose.

But the inspector is a mere trifle compared to when you suddenly have to put out a real fire. It turns out that there is nothing. I think you can imagine the further development of events.

It is in order to prevent both types of trouble that we have gathered today. Together we will figure out how to determine the diameter of the sleeve, how to choose it correctly, and much more necessary, interesting related information. Well, I hope the motivation is convincing and no one gave up. Let's start to figure it out?

I suggest starting with them, because if fighting fire is not your profession, then most likely you will encounter them. Where will you meet? You live somewhere, work... That is, it is in buildings and premises that they are used.

By the way, this use is strictly regulated by regulations. Let's look at which ones in order:

1. Code of Practice SP 10.13130.2009 “Fire protection systems. Internal fire water supply." The requirements for minimum water consumption when extinguishing fires in buildings of various heights and purposes are clearly described here. There is also the necessary table of water consumption depending on the diameter of the fire hose.
2. GOST R 51049-2008 “Fire fighting equipment. Firefighting pressure hoses. Are common technical requirements. Test methods". Here are all the necessary standards that the fire hoses you choose must meet.
3. Methodological guidelines for the organization and operation of fire hoses. It provides clear requirements and recommendations for use, maintenance, repair and much, much more, including the decommissioning of fire hoses.

This documentation completely and transparently describes everything that needs to be known and performed when equipping a building or premises of various purposes with elements of a fire safety system.

But let's return to diameters. The most common sizes of pressure fire hoses are 51mm diameter, 66mm diameter and 77mm diameter. The first two options are used not only for completing fire cabinets in buildings, but also on fire trucks.

Naturally, they have significant differences, since their operating pressure is higher - from 1.6 MPa to 3.0 MPa versus 1.0 MPa for taps. The third option - 77mm - is used exclusively on fire fighting equipment, being in service with the Ministry of Emergency Situations.

Besides the obvious differences in the density of the materials used to withstand higher pressures and the corresponding markings, there are differences that can be determined, literally, on the spot. We are talking about such an indicator as weight.

So, how much should one meter of RPK with a diameter of 51 mm weigh for a crane? The answer is no more than 350 grams. The same diameter, but for RPM – 450 grams. At first glance, the difference is insignificant, but if you consider that the standardized length of the RP for cranes is 10, 15 and 20 meters, and the RP for equipment is 20 meters, then you will agree that it is easier to notice the difference.

Now we will carry out similar measurements with a diameter of 61 mm. For taps - no more than 450 grams, for equipment - 550 grams. The length of the sleeves is the same.

Finally, 77mm. The weight of one linear meter is technical means is 650 grams.

In fact, all technical characteristics are indicated directly on the surface. It is for this purpose that marking is carried out. It is located next to the connecting head - no further than 10-15cm from it.

What you should pay attention to here: RPK - hoses for cranes, RPM - for fire fighting equipment. Just remember that, regarding the diameter, the marking indicates the nominal diameter, but we are talking about the actual one. That is: the actual 51mm corresponds to the nominal 50mm, the catch 66mm corresponds to the nominal 65mm.

You can easily find more complete information in GOST R 51079-2008. Don't be lazy so you don't buy a cheap fake.

How to choose the right RPK

How to determine which sleeve is needed? In fact, there is little trick here. Firstly, refer to the above regulations. Secondly, it depends on the diameter of the fire water supply pipe at your facility.

I’ll tell you a secret, only for you – in 99% of cases, a fire cabinet will need a diameter of 51mm. Let me explain: no matter how many fire experts I have talked to, they all unanimously claim that they have not come across a 66mm diameter in buildings for a long time, since it is already an “outdated format”.

The vast majority of buildings are equipped with 2-inch fire water supply pipes, on which, accordingly, a PK-50 tap is installed. This necessitates the use of RPK with an identical nominal bore, that is, an actual diameter of 51 mm.

However, it still cannot be ruled out that you may stumble upon a 2.5-inch pipe with a PK-70 tap. This is where 66mm is needed. Although it is now recommended to use various adapters so as not to mess with a rare format.

One way or another, both diameters of the RPK fully comply with all the necessary requirements prescribed in SP 10.13130-2009. As if by chance, I reminded you of the importance of technical documentation in such a matter as fire safety.

Suction-pressure fire hoses

You will agree that pressure hoses alone are not enough for firefighting equipment. After all, you need to get water somewhere. For this purpose, suction and pressure-suction are used. The first ones are intended only for collecting liquid from open sources; the pressure they can withstand is low - 0.3 MPa.

The latter have a wider spectrum of action, since they can also be used for intake from water supply networks (hydrants), which, as we know, are under pressure. Their working pressure is from 0.3 MPa to 1.0 MPa.

By the way, if you have a motor pump, pressure and suction hoses are often used for domestic purposes. For example, summer residents, gardeners, for watering. After all, if there is a river or lake nearby, then everything can be organized perfectly.

Their diameter is extremely variable: 25mm, 32mm, 38mm, 50mm, 65mm, 75mm, 100mm, 125mm, 150mm, 125mm, 150mm, 200mm, 250mm and 300mm. This diversity is due to the very wide range of applications of this type of hose.

With their help, they fight floods by pumping out liquid, and fight fires by taking and transporting it. By the way, not only it, but also various bulk materials, vapors and gases under high pressure.

Directly during fire fighting, a diameter of 100 mm is used to collect and transport water to the fire site. The weight of one linear meter here ranges from 4.5 to 6 kg, depending on the class (B - for water, B - for gasoline, KSh - for acid-base solutions no more than 20%, and so on).

Standardized lengths are 4, 8 and 10 meters. However, if the length is not enough, the sections are joined using special couplings.

Surely, you have already guessed that this type of fire equipment is highly durable. Hence, strictly speaking, the weight. But you can get acquainted with the characteristics of suction and pressure-suction hoses in more detail in GOST 5398.

It seems to me that this is where we can end the conversation about the diameters of fire hoses. After all, we have discussed exactly those options that you may be faced with. However, today we discussed only isometric characteristics.

Therefore, the conversation about fire-fighting equipment in general, and about hoses in particular, is not yet over. So that we can continue it in a cozy, homely environment conducive to confidential communication, subscribe to this blog. Connect your friends and acquaintances by sharing with them on in social networks our link. Take care of their safety too.

A fire hose is one of the main primary fire fighting equipment. It is mandatory at every facility and is an integral attribute of firefighters of the Ministry of Emergency Situations. The device is designed to supply a working medium to fire sites. It is also installed in transport: road and rail. PR is mandatory in military units and on water vessels - sea and river. Technical characteristics, dimensions, storage conditions, features of operation and maintenance of fire hoses are regulated by GOST R 51049.2008. The requirements of the state standard are aimed at maintaining the operability of equipment and effective operation during an emergency.

Since there are different types of flexible fire hoses, their design is somewhat different from each other. PRs are classified into three groups:

• Suction. This type of fire fighting equipment operates using a pump, so it must be as durable, reliable and flexible as possible. These modifications are made from rubber using vulcanization technology. Durability is ensured by the outer fabric casing. Suction devices have the greatest weight compared to analogues of other types. The diameter of such products reaches 20 cm, and they can weigh up to 6 kg. Heads are not included.
• Pressure and suction. This type has the same dimensions as the suction ones: the diameter of the fire hose is up to 20 cm, weight is up to 6 kg. This modification is designed for pumping water from hydrants and water sources. For the fence working fluid a vacuum is created inside, so the hose must have a metal frame, and the top is covered with a casing made of durable, coarse fabric. This type is regulated by a separate GOST 5398.76. Supplied without heads.
• Pressure. Pressure models can reach 30 cm in diameter and up to 7 kg in weight. This type of fire hose supplies liquids and fire extinguishing agents to the fire under excess pressure, so the main structure is a durable fabric casing, the inner surface of which is covered with waterproofing materials: rubber, latex or polymers. Metal fittings are installed outside. PR are supplied in fully equipped. Below you can see the performance characteristics of pressure hoses in the table.

Important! When choosing a primary fire extinguishing agent, you should first of all be guided by the purpose, but do not forget about technical specifications specific model. They must be suitable for the upcoming operating conditions.

Marking

The marking of flexible fire hoses is also regulated state standards. It must be applied to each product and include:

• manufacturer's trademark or name;
• product class;
• device type;
• diameter;
• operating pressure;
• length in meters;
• date of manufacture;
• GOST;
• technical control mark.

Also, the PR must be marked with the designation of the part of the Ministry of Emergency Situations or the enterprise where it is operated.

Maintenance and repair

GOST establishes requirements not only for the purpose, types, design and use of fire hoses, but also regulates the timing and procedure Maintenance. These products are subject to regular inspections - at least once a year. A commission is created for control.

Activities include the following operations:

• unwinding the fire hose along its entire length in one line on a flat and clean surface, without the risk of contact with chemicals and flammable substances;
• visual inspection for integrity and absence of damage, if any, repair;
• washing and drying the product, preferably outside in the shade;
• hydraulic tests, fluid is supplied under maximum pressure;
• rolling the PR onto a new rib;
• installation of the product in the cabinet and sealing;
• paperwork.

You should understand! The head of the organization or enterprise is responsible for the performance of the fire hose, even if there is a responsible person appointed by order. Therefore, the TOP manager is obliged to control everything that happens with fire safety equipment.

Based on the results of the maintenance, an inspection report is drawn up with a list of work performed, a mark is entered in the log, and a tag is stuck on the fire hose; it can be a certified copy of the report. This determination of actions is regulated by the PPB. Violation of the order may be accompanied by penalties. During maintenance or transportation, all possibilities of damage to the fire protection device must be avoided.

How to choose the optimal model

The basic parameters that you should pay attention to when choosing a product are:

• Length. This characteristic must correspond to the characteristics of the room. The standard length of PR varies from 4 to 20 meters. On a large-scale facility, it is advisable to install a large number of cranes.
• Diameter. First of all, this size must correspond to the diameter. If there is a discrepancy, adapter connection heads are used. These products allow not only connecting a faucet and hose of various diameters, but also hoses with different diameters. The heads form a sealed connection, typical factory sizes: 7.5, 10 and 12.5 cm.

Heads and barrels are not always included with the devices, so they must be purchased separately. But their presence is mandatory, since without them the fire hose is not operational. The primary fire extinguishing agent in an emergency will not be able to be connected to a source of extinguishing agent.

Additional classification of fire hoses

In addition to the main classification, there are additional gradations. One of them suggests categories for use in a different climate:

• U1 - for moderate;
• UHL1 - for cold and moderate temperatures;
• TU-1 - for tropical and temperate.

GOST also divides PR into classes according to purpose:

• G – hoses through which it is possible to transport not only water, but nitrogen, carbon dioxide and inert gaseous media;
• B – the use of this modification is associated with the transportation of 20% solutions of alkalis and acids, except for nitrogen compounds; the supply of process water without additives is also not recommended;
• VG - the hose can transport hot water;
• B – class is intended for petroleum products and oils, that is, its design provides resistance to petroleum flammable media;
• Ш – these hoses can be used to transport bulk substances, as well as weak acids and alkalis.
• P – these are environmentally friendly hose products designed for transporting food;
• KShch for supplying 20% ​​solutions of acids and alkalis;
• PAR-I – for water vapor, with temperatures up to +143 degrees C;
• PAP-II – for vapors with temperatures up to +175 degrees C.

Classification by functional configuration:

• RPM – for fire engines;
• RPK-N – for external taps;
• RPK-V – for internal taps.

Gradations according to design features:

• D – product with 2-sided polymer coating;
• P – product with an impregnated frame and an internal polymer layer;
• B – product with internal insulation.

Special purpose fire extinguishing agents are divided into:

• And – wear-resistant sleeves;
• M – products resistant to oils;
• T – products resistant to temperatures, they can be used to pump hot working fluids

On a note. The marking is applied to the product in such a way that the information remains readable as long as the product is in use.

How to choose a fire hose for an office, warehouse, public building?

Suction and pressure-suction hoses are used as part of the fire fighting equipment of fire trucks.

Designed to complete a fire hydrant in a public building pressure hose , which is also popularly called a “fire hose”. This is exactly what we will talk about.

The use and operation of fire hoses are regulated by the following documents:

·you must also be guided by the design documentation for the building in which your enterprise is located.

To choose the right fire hose, you need to pay attention to the following parameters: internal diameter, working pressure and length, as well as hose configuration.

This depends on the fire water supply installed at your facility. Standards for the diameters of pressure hoses (according to GOST): 25, 38, 51, 66, 77, 89, 150 mm. The most common is 51 mm, much less common is 66 mm, the rest are not very common. In addition, there are specialadapter heads , allowing you to switch from a larger diameter to a smaller one.

Of course, the more pressure a fire hose can withstand, the better. However, such sleeves are much more expensive. To complete a fire hydrant in a public building, as a rule, a pressure of 1.0 MPa (MegaPascal) is sufficient.

According to GOST R 51049-97, pressure hoses must have a length of 10.15 or 20 m, with an error of ± 1 m. Hoses with a length of 18 m are commercially available (most often Chinese). Due to this, they are cheaper, but do not meet the requirements of GOST R. When purchasing, pay attention to the labeling.

Factory marking the pressure hose should be located at a distance of no more than 0.5 m from both ends and contain:

· name or trademark of the manufacturer;

type of pressure hose; conditional pass; operating pressure;

·length of the pressure hose, m (for RPK pressure hoses);

· special design (if available); climatic version according to GOST 15150;

date of manufacture (month, year).

We recommend purchasing “tie-in” sleeves, i.e. with already imposedconnection heads (GR) . Connecting heads are used to attach a fire hose to a fire hydrant, to fasten fire hoses together (when water supply is required over a distance exceeding 20 meters). Sleeve heads are available in both metal and plastic.

It is important to correctly match the head to the type of barrel and the type of sleeve used. Thus, the GM-50 pressure coupling head is designed mainly to work with 51 mm pressure hoses equipped with GR-50 heads, and the GM-70 head is designed to work with 66 mm hoses with GR-70 heads. If the diameters of the hose lines do not match, adapters are used (for example, from 51 mm to 66 mm, and from 66 mm to 77 mm). In Russia, heads with two diametrically located grips (“fangs”) are used. Sometimes the head is called a "half nut".

How much does a fire hose cost?
RCS LLC offers fire hoses from leading Russian manufacturers with imposed aluminum GR.
Retail price of fire hose:
- sleeve dia. 51 mm, with GR-50 (al.) - 870.00 rub./piece.
- sleeve dia. 66 mm, with GR-70 (al.) - RUB 1,740.00/piece.
There is a discount system.

For storing fire hoses at a protected facility, they are used