Any building those heights are above 15 Mtr. Like hotels, colleges, hospitals, offices, institutes, industries and other community centers need fire hydrant for safety.
If any hydrant valves designed and manufactured as per quality standards, require less maintenance. A simple periodic maintenance like cleaning, greasing or washer can be changed if requires.
Mostly smoke alarm make sound at a particular interval, it means its battery is low. If your fire alarm beeps randomly then it might be other problems like-
1) The fire alarm cover may be dirty.
2) The fire alarm needs to be reset.
3) Power supply to the fire alarm might be interrupted.
4) The power alarm needs to be replaced.