Fire hose – a flexible pipeline and equipped with connecting heads for supplying water to the fire. Fire hoses are divided into the suction (naporno- vsasyvayutsie) and pressure. Suction (pressure-suction) Sleeves are designed for sampling the water from the water source by a fire pump or pumps.
The pressure hoses are used for supplying water under pressure to the fire.
Held by the fire hose cabinets and reserve must be in good technical condition. Responsibility for maintenance work and safety of fire hoses rests with those responsible for fire safety in the units.
The suction hose (group 1) are intended for the abstraction of water from open water sources, and pressure-suction hoses (Group 2) – of the water supply network.
Currently available (or are in operation), the pressure hoses the following types:
– Rubberized GOST 7877-75;
– Lateksirovannye 17RSFSR TU and TU 40-6851-77 75.080.05.026-
– With double-sided coated 17RSFSR TU 40 11118-86;
– TU 6-19-151-88 reinforced plastic;
– Linen GOST 472-75 and TU lnodzhutovye 17RSFSR 40-10257-82;
– A sleeve for a working pressure of 3.0 MPa.
Under the operation of fire hoses refers to use them to carry out operational tasks, maintenance, repairs, registration and storage.
When water from the pier or the steep bank of the pond is recommended to use the second (discharge) the rope tying her neck grid. Unloading the rope takes the weight of water, located in the suction line, and helps prevent damage to the suction hose.
To prevent freezing of water in the arms of the suction line after prolonged use fire pump on a small part of the cost of water should be discharged back into the reservoir through a discharge hose attached to the nozzle of the pump free.
When installing the suction line, it must be ensured that the sand did not get to the junction, land, and so on. N., Violates tightness. There should be no sharp bends, mechanical damage hoses, prohibits the movement of arms drawing.
When working on the fires and maneuvers to avoid contact with oil products sleeves and corrosive chemicals when laying hose lines must be sure that the hoses do not have sharp bends, to avoid laying hoses over sharp or burning (smoldering) objects, surfaces, flooded with fuel, lubricants, or chemicals.
Lay the hose lines in stairwells should be between the marches, not cluttering with walkways and stairs. Laying of hose lines on the street, the road, the court should be made possible on the part impassable, and a railway or tram tracks – under the rails between the sleepers. In traffic areas must be protected by a sleeve vehicles baghouse bridges.
Maintenance – a set of preventive measures carried out in order to maintain the fire hoses in good condition. If any defects while sleeves made their repairs.
Marking suction hoses must contain name of the manufacturer, the standard number, group, type, internal diameter, operating pressure (for hoses Group 2), length and manufacturing date.
Marking hoses shall be marked at a distance of not less than 150 mm from the outer end of the bedroll and contain:
– Manufacturer’s name or trade mark;
– Internal diameter, in millimeters;
– Bedroll sleeve length, m;
– The date of manufacture (month, year);
– Designation of the standard;
– Stamp of the TCI.
At the other end of the sleeve must be marked with the abbreviated name of manufacturer.
When testing the suction hose for leaks one end of it is connected to a pressure source, the other closed cap having valve to release the air.
When the sleeve valve open slowly filled with water until complete removal of air therefrom, the tap is closed and gradually pressurized to said sleeve in Table. 1 test pressure value in accordance with the diameter and sleeves group sleeve and kept at this pressure for 10 minutes. In the sleeve there should be no breaks in the water seepage, and the dew local blistering and deformation of the metallic spiral.
Table 1
To test the hoses for leaks at one end of the vacuum hose connected to a vacuum line with manometers, another choke. Create a vacuum in the sleeve, is equal to (0,08 ± 0,01) MPa overlap vacuum line sleeve and held at the reduced pressure for 3 minutes. The fall of the vacuum in the sleeve during this time should not exceed 0.013 MPa. During the tests, the outer surface of the sleeve should not be squashing and kinks. After the test, the inner sleeve cavity browsing born. Sleeve, pass the tests should not be on the inner surface of the bumps, blistering, peeling, and tears.
Bedroll sleeves in a single or double bedroll made after drying. the device can be used to bedroll, shown in Fig. 1.
The sleeve is wound onto the lower coil single bedroll to the mid-lengths marked on it a transverse strip, and then the middle part is placed in the plug top coils, which rolls up sleeve double bedroll one end of the drum drying unit or the floor, the other – from the bottom of the coil .
The single bedroll sleeve wrap the entire length of the top or bottom of the coil.
If necessary, a new hose perekatki crease this can be done using the same tools.
The suction hose should be repaired if they do not meet the test requirements, as well as in the presence of mechanical damage (punctures, abrasions, crushing spiral) and other failures. With the weakening of the tension clamps securing the sleeve to the suction head, they are tightened with a wrench and counter nut.
With the loss of integrity and external damage repair sleeve one way, depending on the nature of the damage:
a) applying the patches on the outer surface of the sleeve adhesive compositions;
b) vulcanizing the raw rubber. Storage shall be subject only pure dried sleeves. Do not store hoses near the operating equipment that can produce ozone, as well as artificial light sources that emit UV rays. The sleeves should be protected from direct sun and heat rays from falling on them oil, gasoline, kerosene, by action of their vapors, as well as acids, alkalis and other substances that deplete the rubber.
Instruments for the presence of arms, their state and write-offs are:
– Sleeves passport;
– Statement of the state of the economy of the bag;
– Act on writing off sleeves, etc..
Download obrazetsvedomosti condition sleeve economy: vedomost-sostoyaniya-ruk-hoz-va.docx