Applies to diaphragm type gas meters, designed for revenue measurement of fuel gas, having a flow rating of less than 500 cubic feet per hour (14.1 m3/h) capacity at 0.5 inch water column (125 Pa) differential pressure at standard conditions. To obtain a
ANSI B109.1-2000 history
2000ANSI B109.1-2000 Diaphragm-Type Gas Displacement Meters (Under 500 Cubic Feet Per Hour Capacity)