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The cleaning and purging of flammable gas piping systems, including cleaning new or existing piping systems, purging piping systems into service and purging piping systems out of service, shall comply with NFPA 56.
  1. Compressed gas piping systems other than fuel gas piping systems where in accordance with Chapter 53.
  2. Piping systems regulated by the International Fuel Gas Code.
  3. Liquefied petroleum gas systems in accordance with Chapter 61.
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Related Code Sections Compressed Gases,
Cleaning and purging of the internal surfaces of piping systems shall be conducted by qualified individuals trained in cleaning and purging ...