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 2012 Edition – National Fuel Gas Code: 

The 2012 edition of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, was approved by ANSI on August 31, 2011. The edition includes revised purging procedures, two new Schedule 40 pipe sizing tables, revised CSST bonding location, and the deletion of "room large in comparison" clearance criteria.   For additional guidance and information contact Paul Cabot, Secretary, ASC Z223 & NFPA 54, American Gas Association, 400 N Capitol St, NW, Washington, DC 20001: PHONE: 202.824.7312; FAX: 202.824.9122; email:



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