AGA

National Fuel Gas Code, 2009 Edition, Includes Amendment A (2009) and Amendment B (2010)
standard by American Gas Association, 10/01/2008

National Fuel Gas Code, 2015 Edition, 2nd Printing (Includes Errata)
standard by American Gas Association, 2014

National Fuel Gas Code, 2018 Edition
standard by American Gas Association, 2017

Addendum 2 to GPTC Guide for Gas Transmission and Distribution Piping Systems (ANSI Z380.1-2009), 2009 Edition
Amendment by American Gas Association, 01/01/2010

Addendum 3 to GPTC Guide for Gas Transmission and Distribution Piping Systems (ANSI Z380.1-2009), 2009 Edition
Amendment by American Gas Association, 06/01/2010

Addendum 4 to GPTC Guide for Gas Transmission and Distribution Piping Systems (ANSI Z380.1-2009), 2009 Edition
Amendment by American Gas Association, 08/30/2010

Addendum 7 to GPTC Guide for Gas Transmission and Distribution Piping Systems (ANSI Z380.1-2009), 2009 Edition
Amendment by American Gas Association, 10/20/2011

Distribution Integrity Management Program (DIMP)
standard by American Gas Association, 01/01/2009

Guide for Gas Transmission and Distribution Piping Systems, 2012 Edition (ANSI Z380.1-2012), Includes Addendum 1 (2012), 2 (2013), 3 (2013), 4 (2013), 5 (2014), 6 (2014), and 7 (2014)
standard by American Gas Association, 2012

Addendum 3 to Guide for Gas Transmission and Distribution Piping Systems, 2012 Edition (ANSI Z380.1-2012)
Amendment by American Gas Association, 2013

Addendum 4 to Guide for Gas Transmission and Distribution Piping Systems, 2012 Edition (ANSI Z380.1-2012)
Amendment by American Gas Association, 2013

Addendum 5 to Guide for Gas Transmission and Distribution Piping Systems, 2012 Edition (ANSI Z380.1-2012)
Amendment by American Gas Association, 2014