What's the difference between an indoor hydrant and an outdoor hydrant? How to calculate the fire flow?

Indoor hydrant and outdoor hydrant are different in object and function.

1, including different objects

Indoor fire hydrant refers to the fire hydrant set inside the building; Outdoor fire hydrants include outdoor fire hydrants outside buildings and municipal fire hydrants on both sides of roads.

2. Different roles

Indoor fire hydrants are mainly used for building fire extinguishing, and can be directly extinguished by pulling the hose water gun. Outdoor fire hydrants are mainly used to supply water to fire engines, which are using the water to connect the water pump adapter of indoor fire hydrants to supply water to indoor fire hydrants.

In addition, the calculation of fire flow should be based on the architectural design code and civil buildings on different floors, and there is no fixed standard.

Extended data:

Construction and installation requirements of outdoor fire hydrant

1. The construction and installation shall conform to the relevant standards in Code for Acceptance of Construction Quality of Building Water Supply, Drainage and Heating Engineering (GB50242-2002). Please refer to the national building standard design atlas 0 1S20 1 outdoor fire hydrant installation.

2. The system must be subjected to water pressure test, and the test pressure is 1.5 times the working pressure, but not less than 0.6MPa.

3, outdoor fire hydrant location signs should be obvious, the location of the bolt mouth should be easy to operate. When the bolts are wall-type, if there is no requirement in the design, the installation height of the center of the inlet and outlet bolt holes from the ground should be 1. 10m, and there should be measures to prevent falling objects from hitting above it.

4, outdoor fire hydrant and fire pump adapter installation size should comply with the design requirements, the allowable deviation of bolt installation height is plus or minus 20 mm. ..

Baidu encyclopedia-indoor fire hydrant

Baidu encyclopedia-outdoor fire hydrant