NFPA 56, Standard for Fire and Explosion Prevention During Cleaning and Purging of Flammable Gas Piping Systems 2023

Provisions apply to electric-generating plants and in industrial, institutional, and commercial applications including:

• Cleaning new or existing piping systems
• Purging piping systems into service
• Purging piping systems out of service

The NFPA 56 is revised to reflect the most current industry knowledge on cleaning new and existing systems, purging piping systems into service, and purging piping systems out of service.

Changes to NFPA 56 include:

• Expanded coverage of the training steps to be included in a training plan and how training should be provided to match the language and vocabulary level of the participants
• Added criteria on when piping is to be purged out of service as well as when it is to be cleaned
• Addition of a new annex on the consideration of human factors when purging to help users identify key human factors to consider when purging operations are conducted

About NFPA

NFPA is known as the trusted source of safety knowledge, the National Fire Protection Association (NFPA) has been helping to solve some of the planet’s toughest safety problems for more than 125 years. To remain relevant for over a century as a knowledge and information organization, we’ve continually evolved our scope of expertise—from fire prevention, wildfire preparedness, and electrical safety to hazardous materials, community risk reduction, and public safety.

Other Works

• NFPA 54: National Fuel Gas Code, 2021 
• NFPA 13 Standard for the Installation of Sprinker Systems 2016 
• NFPA 13R, Standard for the Installation of Sprinkler Systems in Low-Rise Residential Occupancies 2019 Edition