Specification, model and size of fire hose

Fire hose specifications and size of the relevant information is as follows:
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A common specification of fire hose is "type 8 Φ 65 rubber-lined hose", where "type 8" may refer to a certain characteristic or category of hose (although the specific meaning of "type 8" is not specified in the information provided), "Φ 65" means that the nominal inner diameter of the hose is 65mm, and "rubber-lined" means that the hose is lined with rubber.
Another expression may include the length of the hose, for example, "20-65-20" may mean a length of 20 meters, a nominal inner diameter of 65mm, and a certain characteristic or material (here "20" may mean length at the beginning, but the meaning of "20" at the end is unknown and needs to be determined by specific context).
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Length: The length of the fire hose is usually determined according to the use requirements, but there is a certain standard range. For example, indoor fire hydrant should be equipped with fire hose length should not exceed 25 meters, and portable hose should be equipped with fire hose length should be 30 meters. The length of the common water belt is 20 meters.
Nominal diameter: The nominal diameter of the fire hose is usually 65mm, which is the standard size for indoor fire hydrants. However, other diameters of water bands, such as 80mm, exist, but may not be suitable for all applications.
Other dimensions: Regarding the width of the fire hose, the information provided does not directly give a specific value. However, considering the structure and use of the water belt, its width is usually determined by factors such as its inner diameter and material thickness.
Other relevant information:
Fire hoses are hoses used to carry high-pressure water or flame-retardant liquids such as foam, with a rubber lining and an outer wrap (such as linen braid or polymeric materials such as polyurethane).
Both ends of the fire hose have metal joints to facilitate the connection of another hose to extend the distance or to connect the nozzle to increase the pressure of the liquid spray.
There are also certain requirements for the service life and storage environment of the fire hose. For example, the service life is usually 5 years (but the shelf life of the hose of different materials may be different), and the storage environment should have small temperature difference and no corrosive object gas.
To sum up, the specifications and sizes of fire hose vary according to the use requirements and standards, but the common specification is "8 type Φ65 rubber-lined hose", the length is 20 meters or according to specific needs, and the nominal diameter is 65mm.