Thanks.
I forgot to tell you that we are working on the detail design of one EO/EG process plant. The current setting of the relief valves in P&IDs are as I described above.
CHD01-your comments give me very good instruction. Now,we are working on a process plant(EO/EG).The relief valves designed by basic design suppliers can not satisfy the requirement of " at least one inspection per year" of the Codes.Because all the relief valves in PIDs are single and...
I have read that article and I think the viewpoint in it is useful.We should enhance safety by learning the accident more effectively.We should not stop hazard identification and analysis during the mormal operation of plants.
Thanks
Suncl