ANSI Z21.15-2009 American National Standard/CSA Standard for Manually Operated Gas Valves For Appliances, Appliance Connector Valves and Hose End Valves (same as CSA 9.1)
Details test and examination criteria for manually-operated gas valves, not exceeding 4 inches (102 mm) pipe size, and pilot shut-off devices, except for hose end valves and appliance connector valves, intended to be used as part of a gas-fired appliance.
ANSI Z21.15-2009 history
2009ANSI Z21.15-2009 American National Standard/CSA Standard for Manually Operated Gas Valves For Appliances, Appliance Connector Valves and Hose End Valves (same as CSA 9.1)