max allowable pressure
max allowable pressure
(OP)
Hi!Is there any safety code for max allowable pressure in air conditioning accessories like fan coils in residentials?Is high pressure water a hazard itself even if the unit's working pressure is high enough?





RE: max allowable pressure
Pressure inside a system should of course not exceed the rated pressures of the equipment/valves/pipes etc involved.
Pressure in liquid systems is a lot less dangerous than pressure in gas systems as gasses will be compressed under pressure and can expand (explode) with violent force when a rupture or leak occurs.
High pressure in water can be dangerous if the temperature of the pressurised water exceeds the boiling point at atmospheric pressure. In this case the water will turn into steam instantly when a leak occurs.
RE: max allowable pressure
Anyway, what pressure are we talking about here?
Over here, high buldings usually have separate systems at every 50-60 metres or so to limit the pressure on radiators or fancoils on the occupied floors to 6 bars.
This is just a practical thing as most regular radiators, valves and other equipment are rated to 6 bars.
RE: max allowable pressure
UL 1995 UL Standard for Safety Heating and Cooling Equipment
RE: max allowable pressure