AWWA C713:2015 pdf download.Cold-Water Meters— Fluidic-Oscillator Type
4.1.3 Measuring chamber (transducer housing). Te materials used in the construction of the measuring chamber shall have sufcient dimensional stability to retain operating accuracy 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. Measuring chambers shall be made of a copper alloy containing not less than 85 percent copper, such as UNS C89510, C89520, C89833, or C89836, or a similar copper alloy as listed in ASTM B584; or a suitable engineering plastic, such as polyethylene in accordance with ASTM D1248, polyphenylene oxide (PPO) in accordance with ASTM D2874, polystyrene in accordance with ASTM D4549, styrene-acrylonitrile (SAN) in accordance with ASTM D4203, or polyphenylene sulfde (PPS) in accordance with ASTM D4067.
4.1.4 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) per ASTM D3935, acetal in accordance with ASTM D4181, nylon (PA) in accordance with ASTM D4066, or propylene in accordance with ASTM D4101.
4.1.5.2 Breakable. Breakable covers (frost-protection devices) shall be made of cast iron, such as those listed in ASTM A48, ASTM A126, or ASTM A159; austenitic stainless steel, such as those listed in ASTM A167; a copper alloy containing not less that 75 percent copper, such as UNS C89510, C89520, C89833, or C89836, or a similar copper alloy as listed in ASTM B584; or a suit- able engineering plastic, such as polycarbonate (PC) in accordance with ASTM D3935, polyphenylene sulfde (PPS) in accordance with ASTM D4067, nylon (PA) in accordance with ASTM D4066, or thermoplastic polyester (TPES) in accor- dance with ASTM D5927. See Sec. 4.2.9 for fatigue limits and burst pressure. If employed, full polymer liners shall prevent exposure to metered water.AWWA C713 pdf download.