AWWA C704-15 pdf download.Propeller-Type Meters for Waterworks Applications
4.1.2 Flow tubes or main cases. Flow tubes or main cases may be made of cast iron in accordance with ASTM A126, ASTM A159, or ASTM A536, or fabricated steel in accordance with ASTM A53 and ANSI/AWWA C200. Te fow tubes or main cases may be protected by a corrosion-resistant coating or other anti- corrosion treatments such as those described in ASTM A153, ANSI/AWWA C210, and ANSI/AWWA C213.
4.1.3 Register boxes and covers. Register boxes and covers shall be made of a copper alloy containing not less than 57 percent copper, such as UNS C85800 in accordance with ASTM B176 or ASTM B584; cast iron in accordance with ASTM A48, ASTM A126, and ASTM A159; aluminum, such as UNS A03190 in accordance with ASTM B26 or ASTM B85; or a suitable engineering plastic, such as polycarbonate in accordance with ASTM D3935, nylon in accordance with ASTM D4066, propylene in accordance with ASTM D4101, or acetal in accordance with ASTM D4181. Register boxes and covers made of cast iron shall be protected with a corrosion-resistant coating.
4.1.4 Propellers. Propellers shall be made of suitable molded or cast mate- rial having sufcient rigidity and strength to operate at the maximum rated capac- ity of the meter. Propellers shall have a specifc gravity as close as possible to that of water. Tey shall be of sufcient dimensional stability to retain operating clear- ance and not warp or deform when exposed to operating temperatures of 100°F (38°C). Representative materials include engineering plastics, such as polyethylene in accordance with ASTM D1248; propylene in accordance with ASTM D4101; nylon in accordance with ASTM D4066; polyphenylene oxide in accordance with ASTM D4067; or acrylonitrile-butadiene-styrene (ABS) in accordance with ASTM D4673.
4.1.5 Propeller shafts and spindles. Propeller shafts and spindles shall be made of stainless steel such as ASTM A276 Types 316 or 303, ASTM A530 Grade CF8M, or ASTM A167 Type 316; monel such as UNS NO4400 in accordance with ASTM B164 or UNS NO4400 in accordance with ASTM B167; or tungsten carbide (88 percent WCA, 12 percent Ni). If the spindle also functions as a bear- ing member, it should be coated or sleeved with a suitable material, such as high- alumina ceramic or chrome oxide.AWWA C704-15 pdf download.