AWWA C700:2015 pdf download.Cold-Water Meters—Displacement Type, Metal Alloy Main Case
4.1.2 Pressure casings. Water meter main cases shall be made of a copper alloy containing not less than 75 percent copper, such as UNS* C89510, C89520, C89833, or C89836, or a similar copper alloy as listed in ASTM B584, or a cast austenitic stainless steel as listed in ASTM A351.
Materials used in the construction of meter main cases shall have sufcient dimensional stability to retain operating clearances at working temperatures up to 105°F (40°C) and shall not permanently warp or deform when exposed to tempera- tures up to 150°F (66°C) for 1 hr.
4.1.3 Register-box rings and lids. Register-box rings and lids shall be made of a copper alloy containing not less than 57 percent copper, such as UNS C85700 or UNS C86200, or a similar copper alloy as listed in ASTM B584 or UNS C85800 as listed in ASTM B176; or a suitable engineering plastic, such as polycarbonate (PC) in accordance with ASTM D3935, acetal in accordance with ASTM D4181, nylon (PA) in accordance with ASTM D4066, or propylene in accordance with ASTM D4101. Materials used in the construction of register-box rings and lids shall have suf- fcient dimensional stability to retain operating clearances at working temperatures up to 105°F (40°C) and shall not permanently warp or deform when exposed to temperatures up to 150°F (66°C) for 1 hr.
4.1.6 Measuring-chamber diaphragms. Measuring-chamber diaphragms shall be made of monel, such as UNS N04400 as listed in ASTM B127; phosphor bronze as listed in ASTM B103; or austenitic stainless steel as listed in ASTM A167; or a suitable engineering plastic, such as PA in accordance with ASTM D4066, PPS in accordance with ASTM D4067, PPO in accordance with ASTM D2874, or SAN in accordance with ASTM D4203.
Measuring-chamber diaphragms shall have sufcient dimensional stability to retain operating clearances at working temperatures up to 80°F (27°C) and shall not warp or deform when exposed to operating temperatures of 100°F (38°C).AWWA C700 pdf download.