CSA ANSI Z21.80-2003/CSA 6.22-2003 (R2008)

This standard applies to line pressure regulators, (see Part V, Definitions), hereinafter referred to as regulator(s), either individual or in combination with over pressure protection devices, hereinafter referred to as device(s), intended for application in natural gas piping systems between the service regulator and the gas appliance(s).