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2020-11-19未分类

Fire hose is used to transport high pressure water or foam and other flame retardant liquid. It is a very common water supply equipment in fire fighting.

While traditional fire hoses are rubber-lined and covered with linen fabrics, advanced fire hoses are made of polymeric materials such as polyurethane and have metal joints at either end that can be attached to another hose to extend the distance or to a nozzle to increase liquid injection pressure. Next, orientflex will introduce the history and usage of fire hose.

PU-Lining-layflat-fire-hose-2

  1. Development history of fire hose

Our country formulated the GB4580-1984 standard for no lining fire hose as early as in 1984, such as appearance, inner diameter of seven measures of technology, according to its working pressure can be divided into 8 KGF/cm 2 hose (cotton) and 10 kg/cm2 (flax and ramie hose) two varieties, according to its inner nominal size of 40, 50, 65, 80 mm four specifications, no lining hose, low pressure, decay resistance, easy to leak, easy to mildew, short service life. In April 1986, the original State Administration of Quality and Technical Supervision of China issued GB6246-1986 “Performance Requirements and Test Methods for Lined Fire Hose” standard. However, with the rapid development of lined fire hose, the requirements for this product are getting higher and higher, such as: In the original standard requirement for length, burst pressure can not meet requirements, then released GB6246 on January 10, 2001-2001 “have lining fire hose performance requirements and test methods, standards, and in 2001 began on June 1st, April 4, 1992, the Ministry of Public Security issued during GA34-1992” fire hose wet technical conditions “, and on January 1, 1993 implementation of wet hose according to the design of work pressure 0.8 Mpa, 1.0 Mpa and 1.3 Mpa. According to the nominal size of its inner diameter is also divided into 40, 50, 65, 80mm four specifications.

  1. II. Use method of fire hose

1) When the hose is connected to the sleeve, a layer of soft protection shall be put on it, and then it shall be fastened with galvanized iron wire or throat hoop.

2) To prevent the direct effect of flame and radiant heat, remember not to make the water strip contact with high temperature objects.

3) The fire hose shall not be in contact with corrosive substances such as oil, acid and alkali.

4) When laying water belt, avoid sharp objects, and use water belt hooks when laying water belt vertically to high places. When laying water belt through traffic arteries, it should be padded with water belt guard bridge. When crossing the railway, the hose shall pass under the track to prevent the fire hose from being crushed by the wheels and intermittently supplying water.

Rubber-lining-layflat-fire-hose-2

5) After the fire hose is filled with water, it shall avoid dragging it forcefully on the ground. When it needs to change its position, it shall lift and move as far as possible to reduce the wear between the hose and the ground.

6) If any damaged holes are found in the process of use, use water belt wrapping cloth to wrap them tightly. In severe winter, when water supply needs to be suspended on the fire site, in order to prevent the water belt from freezing, the pump needs to run slowly to maintain a small amount of water output.

7) The high-pressure resistant hose shall be connected close to the pump. After filling the fire hose with water, it shall prevent torsion or abrupt bending, and prevent the collision and damage of the hose interface.

 

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