Purging of high-pressure coal slurry pipeline
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This post was last edited by Leiyuhuo on 2015-6-8 at 12:54. For high-pressure nitrogen purging in high-pressure coal slurry pipelines, should the shut-off valve be placed before the isolation valve or after it?
After closing the shut-off valve, since there is only one shut-off valve in the slurry pipeline and a slurry circulation has already been established during nitrogen purging, it is not possible to do so before the shut-off valve. If there are two cut-off valves, they should be placed between the two.
This post was last edited by Leiyuhuo on 2015-6-8 at 12:54. It was my fault for not explaining my question clearly; I’ll edit it again.
It could be added after the cut-off valve, or maybe it was drawn incorrectly?
This post was last edited by *aodouzi on 2015-6-9 09:00*. *Inertia still plays a role here; it serves as an additional safeguard to prevent internal leakage in the valve.*
Normally, this should be located in front of the valve