RobsVette
Mechanical
- Apr 15, 2009
- 94
Hi Guys,
I am having an arguement with someone here in our office and have a question regarding best practice for steam relief valve discharge piping connections.
The question is "can discharge piping from relief valves of different operating pressure steam lines, for instance 150 psig medium pressure and 15 psig low pressure, be tied together into the same vent header? My thoughts on this subject has always been that they should not be because of the back pressure produced in the header by the discharging steam would typically be higher in a discharge from a 150psig valve as opposed to a 15 psig valve.
Best practice would be to take all relief valves from the medium pressure system and run them out through a seperate header and take all teh relief valves from a low pressure system and run them out through a seperate header. I assume through some careful engineering and coordination you could run them all together if you are careful of the back pressure but was wondering if anyone had any code references or insight on this?
thanks,
Rob
I am having an arguement with someone here in our office and have a question regarding best practice for steam relief valve discharge piping connections.
The question is "can discharge piping from relief valves of different operating pressure steam lines, for instance 150 psig medium pressure and 15 psig low pressure, be tied together into the same vent header? My thoughts on this subject has always been that they should not be because of the back pressure produced in the header by the discharging steam would typically be higher in a discharge from a 150psig valve as opposed to a 15 psig valve.
Best practice would be to take all relief valves from the medium pressure system and run them out through a seperate header and take all teh relief valves from a low pressure system and run them out through a seperate header. I assume through some careful engineering and coordination you could run them all together if you are careful of the back pressure but was wondering if anyone had any code references or insight on this?
thanks,
Rob