Siraj1986
Chemical
- Feb 18, 2015
- 7
Hey all,
We have a hydrogen recovery unit working on the basis of cryogenic separation. It has a pressure regulating valve at hydrogen product line. That valve is installed with in the cold box and it's actuator assembly is outside for easy maintenance.
We have to remove that actuator along with valve plug for maintenance. This means that cold box internals will be exposed to outside atmosphere.
Do we need to derime the cold box for this activity or simply remove tha actuator plug assembly with positive nitrogen flow through the cold box.
Is it also necessary that we have to derime the cold box for even minor maintenance or not?
Thanks
We have a hydrogen recovery unit working on the basis of cryogenic separation. It has a pressure regulating valve at hydrogen product line. That valve is installed with in the cold box and it's actuator assembly is outside for easy maintenance.
We have to remove that actuator along with valve plug for maintenance. This means that cold box internals will be exposed to outside atmosphere.
Do we need to derime the cold box for this activity or simply remove tha actuator plug assembly with positive nitrogen flow through the cold box.
Is it also necessary that we have to derime the cold box for even minor maintenance or not?
Thanks