Watermain Shutdown Analysis - Secondary Valving
Watermain Shutdown Analysis - Secondary Valving
(OP)
Hello All,
I'm an EIT working on a watermain shutdown analysis for a client. The base analysis simply requires that I model a watermain shutdown between the existing isolation valves that I locate on their as-builts. This is a fairly typical assignment, with the exception of one line at the end of the request that has me a bit confused - "Please also let me know what the impact would be if we had to do secondary valving."
Could someone give me an idea of what is meant by secondary valving? No one in my office seems to have an idea.
Thank you!
Sean
I'm an EIT working on a watermain shutdown analysis for a client. The base analysis simply requires that I model a watermain shutdown between the existing isolation valves that I locate on their as-builts. This is a fairly typical assignment, with the exception of one line at the end of the request that has me a bit confused - "Please also let me know what the impact would be if we had to do secondary valving."
Could someone give me an idea of what is meant by secondary valving? No one in my office seems to have an idea.
Thank you!
Sean





RE: Watermain Shutdown Analysis - Secondary Valving
a) a secondary valve would have to be installed to fully isolate the system or
b) a second valve at another location would also need to be closed to isolate the system
both would have the impact of shutting down a larger section of the system
RE: Watermain Shutdown Analysis - Secondary Valving
Cheers!
RE: Watermain Shutdown Analysis - Secondary Valving
Sometimes when the operator tries to close a valve, the valve will not close and the operator has to move upstream to try to close the next valve.