In refinery air separation units, a drain valve is installed between the safety valve of the feed buffer tank and the upstream and downstream shut-off valves. Is it necessary to have such a drain valve...
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In refinery air separation units, a drain valve is installed between the safety valve of the feed buffer tank and the upstream and downstream shut-off valves. Is it necessary to have such a drain valve? Why?
This post was last edited by ylb913 on 2016-12-3 at 19:10. Air – having it or not isn’t a big problem. Essentially, this is about figuring out how to relieve pressure from safety valves, and relieving pressure relates to the issue of what to do with toxic and harmful substances. Air poses no toxic or harmful issues; when dealing with flanges, it’s just necessary to be careful so as not to cause injury due to too rapid pressure release (there is a risk of startling people and causing them to flee in panic, which could lead to injuries; thorough prior communication is important, as is the competence of the workers).