Rotary gas meters are to be used in the City of Mesa’s natural gas distribution systems for the purpose of billing customer gas usage. Standards: Rotary gas meters (and volume correcting device when used) shall comply with the requirements of 49 CFR 192 and the requirements set forth in this Specification. All national and industry standards referred to in this Specification shall be the latest published editions listed in 49 CFR 192 at the time the material is furnished: ANSI B109.3 Rotary-Type Gas Displacement Meters ANSI/ASME B16.5 Pipe Flanges and Flanged Fittings: NPS ½ through NPS 24 Metric/Inch Standard Design: Meter shall be rotary type, positive displacement and must be compatible with an integrated volume corrector. Meter shall have the capability of both top inlet and side inlet mounting configurations, and the direction of flow through the meter shall be permanently and clearly indicated. INTERNAL MATERIALS: All internal parts and surfaces shall be made of materials resistant to corrosion or chemical attack that would adversely affect the operation of the meter when used to measure pipeline quality gas. Parts made of all copper or parts with a copper content exceeding 75% are considered unacceptable. METER CASE: All meter cases shall be constructed of Aluminum...