For safety purpose, a precommissioning purge and subsequent continuous purge is required throughout the flare system to prevent oxygen infiltration into the flare system that may lead to catastrophic flashback.

Nitrogen makes up 78 % of the atmosphere with gas properties – inert, dry, colorless, odorless, and non-combustible, makes it the most suitable gas for purging. To ensure a positive flow through all flare components, Nitrogen injection will be at the farthest upstream point – at flare tip.