We had a major leak in our waste heat boiler causing a major unscheduled outage recently. After opening up the single pass fire tube boiler, we found out that numerous leaks were present along the tube-to-tube sheet interface where the tubes were rolled/welded. All of them were on the hot side...
In the past, I have always utilized a static head factor of 0.433 ps/ft and vessel MAWP to determine my component tmins for our Sect VIII div 1 vessels. However, the process fluid used has a higher SG than water. Shouldn't I use a head factor based off the SG of the process fluid rather than...
Is there any code exemption to installing a relief device on a pressure vessel that is always open to atmosphere (no block valves in vent line)? We have a section VIII vessel, but it is treated as a flash vent tank that has a line routed to atmosphere. I don't see the need for a relief device...
I have 4 rupture disks from a section VIII div I vessel set @ 175 psig (8200lb/hr is WCDS) that discharge to an atmospheric tank. This tank has a large vent to atmosphere.
How do I determine if the atmospheric tank’s open ended vent to atmosphere is large enough?
