Why cannot the pressure at the outlet of an indoor fire hydrant exceed 0.5 MPa?
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Why cannot the pressure at the outlet of an indoor fire hydrant exceed 0.5 MPa? What is the basis?
Could it be that the impact force pushes people over?
The indoor pressure does not need to be very high; there is no strict requirement regarding range. The higher the pressure, the greater the demands on the pipes.
I wonder if high pressure is the reason why it’s difficult to open the valve...
It might be for reasons related to personal safety
High indoor pressure is dangerous. . . . .
The water supply requires pressure; indoor applications don’t have high requirements regarding range, and too high a pressure makes it difficult for the operator to control it (with such high pressure, it’s impossible for several people to hold it in place)