How to handle cross-line transfers of different media when the unit is put into operation?
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The atmospheric and vacuum distillation unit has started operating immediately. How did everyone on site handle the pipelines carrying different types of fluids in that unit? For example: the fresh water line at the pump inlet used for shutdown washing, the cleaning of pumps and pipelines, the cleaning of distillation lines on various sides, as well as the lines used for furnace venting, etc. In discussions within the workshop, some said that it was sufficient to open three valve assemblies for venting, while others argued that blind flanges must be used. . I wonder how other sailors handle such situations? Have any accidents such as leaks or cross-connections occurred in pipelines made of different materials? Everyone is welcome to share their thoughts freely. .
As long as the purging goal is achieved and there is no wire cross-talk, how should it be done?
I’m referring to what measures are taken to ensure that no cross-connection accidents occur during operation Welcome to have in-depth exchanges
If it is during operation, it is best to install blind flanges
During driving purging, it is advisable to install blind flanges – it’s not worth the hassle. Otherwise, problems are likely to arise while driving.
In my opinion, blind plates must be used; the startup procedure should include a table detailing the installation and removal of such blind plates, with comprehensive records kept in this regard. There are cases where the liquefied hydrogen reflux pump in the stabilizer tower of a catalytic absorption stabilization system has such a fresh water line. It’s outrageous that, due to an operational error, liquefied gas got into the fire suppression system during startup. According to the standards, it might be a bit more complicated and increase the workload, but there’s no need to worry about making such basic mistakes. Personally, I think a three-valve assembly should not be installed in such locations. If there is internal leakage in the valves of the three-valve assembly, don’t you still need to install blind flanges?