Back-Flushing and Air Rumbling

The operators in the Esso Lago Refinery in Aruba used to blow nitrogen into the water inlet line to coolers. It s safer to use nitrogen than air, in case there is a tube leak. They just coupled a 1-in hose to the water inlet nozzle and blew in nitrogen for 10 minutes every day. I call this air rumbling. It helps to dean the tubes. 

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