Regarding degreasing of oxygen-enriched pipelines
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Seeking advice on whether degreasing is necessary for the oxygen-enriched air line in an air separation unit, with an oxygen concentration of 20 percent
Any pipeline that carries oxygen must have its grease removed
It should be degreased! ! It is recommended to strictly follow the requirements of the design documents! ! !
Yes, carbon tetrachloride or steam can be used
Before installation, degreasing should be carried out in accordance with the specifications for oxygen pipeline installation; after installation is complete, the system must be purged with high-pressure nitrogen to ensure it is ready before operation can begin.
:) Those upstairs, check the oxygen concentration of the poster’s area – it’s 20%. The normal oxygen concentration in air is 21%, and only concentrations higher than that of air can be referred to as \"oxygen-enriched\". :lol why bother degreasing?
If it’s the oxygen-enriched air line of an air separation unit, how can the concentration be 20%?
What the OP wrote isn’t correct, haha. Check carefully – these are all low concentrations
There is a passage in Section 2 of Chapter 5 of the \"Guide to the Selection of Industrial Valves\": \"When the concentration of oxygen in the pipeline exceeds 23.5%, it can be considered an oxygen service condition; in such cases, the valves must be selected and manufactured in accordance with the requirements for oxygen valves\"... 20% is not considered an oxygen service condition.