steam out pipe connection
steam out pipe connection
(OP)
A vessel is rated for internal design pressure 300 psig @ 170 F. It is rated for 15 psig @ 510 F as external pressure conditions. The steam out nozzle is hardpiped to a pipe which is rated for 600 F temperature. Is it ok to connect this pipe to the vessel. Would the vessel stand 600 F temperature?





RE: steam out pipe connection
you are feeding a vessel from (not to),
a 600F source and the vessel is only designed for external at 550F and internal 170F.-
Internally or externally, you can not use this vessel.
it is not designed for the temp (You do not specify pressure) I assume it is low pressure.
GB
RE: steam out pipe connection
If we were to take the approach that every chunk of equipment had to be able to handle the highest rated pipe which connected to it we would have a very simplistic approach to setting equipment and piping design pressures and temperatures - and very expensive.
jt
RE: steam out pipe connection
RE: steam out pipe connection
You need also to open all the drains to get rid of the contents of the vessel. When is your vessel gas/liquid free?
When only condensate/steam is coming out of the drains, and steam out of the vents. The steam inside of the vessel is not superheated, because the vessel itself will react like an expansion tank. you just need to monitor the temperature of the tank, that will be far below the 510F.
Steven van Els
SAvanEls@cq-link.sr
RE: steam out pipe connection
Actually, the 15 psig is external pressure - in other words, full vacuum. The concern is that steam could be introduced into the vessel to begin the steamout and then the crew goes to lunch. They haven't yet opened the outlets. They close the steam inlet. Steam cools and condenses. Causes nearly full vacuum in the vessel. Crunch. Basic HazOp.
jt