We do our best to regulate all the medical gases at the source equipment and keep a consistent final line pressure across the entire distribution system.  Having regulators and relief valves scattered throughout the piping can lead to lots of different pressures in different areas.

So glad to hear from you Johnny.  How are things in China? 

I think he is describing regulators Al. 

Thanks for your answers. It's quite common to install regulators and relief valves for each floor in order to have pipe sized simply by high pressure at source and adjust pressure for each area,  Therefore, it was assumed that pressure drop is not considered much.(There are not many designer here know how to size pipe correctly) Generally, there are only three sizes of pipe - one bigger size at source and one unified size at each floor (whatever how may beds for each floor) and one size at each room.

However, There are many problem with such design

1. Leakage risk at each point of regulators

2. huge pressure drop if use poor regulators (tiny hole)

3. Not safety for fire for O2 due to relief valves unless good ventilation nearby each of relief valves should be considered.

We have to convince hospitals that this is not correct design when it come to safety for fire and patient.

Do you agree? Any other comments on negative result with such design? Your feed back would be appreciated!