What does "inert" mean when used as a verb?

At the precommissioning stage, inert the pipeline with nitrogen to 1.1 barg. or:At the precommissioning stage, inert the pipeline with nitrogen to 1.1

At the precommissioning stage, inert the pipeline with nitrogen to 1.1 barg.

or:At the precommissioning stage, inert the pipeline with nitrogen to 1.1 barg.

Tags:pipeline,