How to deal with the accumulation of concentrated nitric acid in the pipes?
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There is a leak in the tube containing concentrated nitric acid, and it is planned to repair it. Previously, the concentrated nitric acid in the tube flowed by gravity through an opening; now, compressed air is to be used for cleaning. Which method is better and safer?
Neither seems to be the best option – natural drainage leaves residues, while air blasting poses safety risks
First make holes, then rinse with dilute nitric acid, and finally rinse with water.
First make holes, then rinse with dilute nitric acid, and finally rinse with water.
Blow purge with low-pressure nitrogen, directing the outlet to a waste bucket (place the waste bucket in an open area as much as possible); take proper protective measures and stay at a distance. After purging, cover any spills on the ground with lime and then rinse them clean with water
If it is a stainless steel pipe, it can be flushed with water