types of fire hose

A fire hose is that which is use to connect hydrant from one side and branch from other side on both side male and female coupling are attached to  connect  hydrant and branch the standard size of coupling use to connect is 63.4 mm and of length of hose should be 15.4 meter standard. and the coupling are made up of steel or stainless steel these hoses are made of IS 14851. in past hoses are made up of cotton but due soaking power when water is transfer or supply from it cotton start absorb it and makes hose heavy due to which in modern time they  are made up of synthetic fiber or fiber obtain from plants. the synthetic fiber used for hose also provide strength and better resistance from abrasion.

Types of hose 

Hoses are made of many types according to their use where they are used and in which environment they are use and the types of hoses used are-

  1. Suction hose- Suction hose are those hose which are used by d-watering unit and water tender to suck the water from open sources of water like lake, pond etc. The hose use for d-watering unit is to suck the water from road and such areas where water gets stucked. these hoses are designed in such way that they can tolerate internal and external pressure and also the pressure of hydrant. these hoses have coupling on size 75 mm, 100 mm, 140 mm.
  2. Partially embedded suction hose- This hose is a type of suction hose. They are usually made of tough lining embedded fully as a spiral. This arrangement are made in such a way that it provide full water way and smooth surface so that there is no loss of forces.
  3. Fully embedded suction hose- it has a thick, internal rubber lining embedded fully with a spiral of wire. Suction hose should be constructed to withstand a pressure of 10.5 bar.
  4. Percolating hose- it is a part of delivery hose in this hose water seeps so that the hoe surface do not make damage to hose this type of hose are made for forest fire purpose.
  5. Non-percolating hose- It is also a part of delivery hose in this hose water do not gets seep because they are used for building and industry. In this hose friction loss is much less than the percolating water. 
Fire hoses must face an tensile force. these forces arises from pressure and flow of water. To find the tensile force this formula should be used

 


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