Firehose

Fire hoses are made of tarpaulin or synthetic fabric impregnated with a special compound and are designed for a working pressure of at least 1.0 M Pa .
To increase water resistance, durability and protection against aggressive media (petroleum products, acids, high and low temperatures), fire hoses can have rubber or polymer coating on the inside and metal reinforcement (braid) or polymer coating on the outside.
For connection to fire-fighting devices ( hydrants , forks, hydraulic elevators, foam generators, fire rods, etc.) and interconnections (for supplying water over a distance exceeding the length of the sleeve) have standard metal connecting heads of the rotary closure. The diameters and configuration of the heads may be different in different countries and for different types of fire fighting equipment.
For example, in the USSR as early as the 30s-40s of the last century, asymmetrical screw connections were used, then Rott's cast iron semi-nuts appeared with three canines located 120 ° relative to each other, and replacing the Bogdanov head (aluminum and brass) with two diametrically located canines (grips). At present, the use of Roth half-hens is prohibited, but the transitional head “Bogdanov-Rott” is registered in the report card of the fire truck tankers.
The heads of the Shtorts widespread in the West did not spread in the USSR for a number of reasons, in particular, because the locking grooves and protrusions on this type of heads are located on the inner side, which complicates their production, and when used in low temperatures can lead to seizure of heads due to icing from the inside.
All coupling heads have one shaped rubber sealing gasket. When the two connecting heads are jointly connected to each other, both rubber sealing gaskets of the two heads under pressure of the liquid are supported (pulled apart), thereby sealing the connection. In addition, there is no possibility of spontaneous disconnection of the coupling heads.

The connecting suction heads are structurally different from pressure vessels due to the fact that the pressure hose works under pressure, and the suction head - under vacuum.

At the place of use fire hoses are divided into:

• suction - as a rule, rigid, used to extract water from the source with the help of a fire pump; standard (for Russia) length - 4 m , internal diameter - 75, 100 or 125 mm.
• pressure-suction - usually soft, used to extract water from a source using a fire pump; standard (for Russia) length - 4 m, internal diameter - 75, 100 or 125 mm.
• pressure - flexible, used to transport water under pressure; The standard (for Russia) length is 15, 18.5 or 20 m, the inner diameter (depending on the type and material) is 25, 38, 51, 66, 77, 89, 150 mm. The most commonly used hoses with a diameter of 51, 66 and 77 mm.

Fire hoses are mandatory fire-fighting equipment in public buildings, are included in the set of equipment for fire - fighting vehicles , trains and ships . For ease of placement and use, they are stored in a collapsed form (most often - in coils or wound on coils, less often - folded "accordion"). After use, the fire hoses must be dried, and during their service periodically they should be straightened and checked that they retain their basic properties - strength and tightness.

• Fire train
• Fire truck
• Fire ship
• Fire centrifugal pump
• Fire Combo Pump
• Fire Pump Vacuum Apparatus