What is the psi limit when inerting or purging?

The psi limit when inerting or purging is set at 5 psi. This limit is important because it helps to ensure safety during the purging process, particularly in the context of preventing the ignition of flammable vapors. Inerting or purging is performed to displace combustible gases with an inert gas (like nitrogen) to create a safe atmosphere in tanks or vessels prior to maintenance or decommissioning.

Maintaining a low pressure limit, such as 5 psi, helps to minimize the risk of creating conditions conducive to explosion while ensuring that the inerting process effectively eliminates hazardous vapors. This threshold encourages proper safety measures and operational practices that align with industry regulations and recommendations.