When performing grinding work on the outside of a pipe, is it necessary to purge the pipe thoroughly and analyze the gas composition inside it?
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If grinding, rust removal, or anti-corrosion treatments need to be performed on the outside of a pipe, is it necessary to purge the pipe and analyze the gas content inside it?
It falls under hot work; the external environment is monitored to maintain positive pressure inside the pipeline
For pipes that are flammable, explosive, or corrosive, they must be purged three times and their contents inspected; only after passing these checks can the next steps be carried out
Thank President Dong for sharing; I will learn from those who are more experienced*
This post was last edited by Shutong on 2023-8-7 at 12:05. Personal opinion: Grinding and rust removal outside the pipeline can generate high temperatures; it should be regarded as a hot work operation, and the pipeline needs to be purged through displacement along with an analysis of the combustible gas content inside it.