Purging and Nitrogen Slugs

Question: How and when is a nitrogen slug used in purging?

Answer: A nitrogen slug is a quantity of inert gas that can be initially injected when purging the air or gas from a section of piping. The procedures work like this:

  • To purge air from piping, natural gas is used immediately following the nitrogen slug injection to push out the slug and air ahead of it.
  • To purge natural gas from piping, air is used immediately following the nitrogen slug injection to push out the slug and gas ahead of it.

Tip: For safety, the purpose of purging with an inert gas (nitrogen) is to eliminate the formation of a combustible gas-air mixture within the pipe. Ensure that all purging procedures are followed in accordance with the company O&M Manual.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s