PDF Standards AGA Z380118
Guide for Gas Transmission, Distribution, and Gathering Piping Systems, 2018 Edition (ANSI Z380.1-2018), Includes Addendum 1 (2018), Addendum 2 (2019), Addendum 3 (2019), Addendum 4 (2019) and Addendum 6 (2021)
standard by American Gas Association, 06/01/2018