AWWA C219-17 pdf download.Bolted Sleeve-Type Couplings for Plain-End Pipe
The selection of materials is critical for potable water, wastewater, and reclaimed water service and distribution piping in locations where there is likeli- hood the pipe will be exposed to signifcant concentrations of pollutants composed . of low-molecular- weight petroleum products or organic solvents or their vapors. Documented research has shown that pipe materials (such as polyethylene and polyvinyl chloride) and elastomers, such as used in jointing gaskets and packing glands, are subject to permeation by low-molecular-weight organic solvents or petroleum products. If a potable water, wastewater, or reclaimed water pipe must pass through such a contaminated area or an area subject to contamination, con- sult with the manufacturer regarding permeation of pipe walls, jointing materials, and so on before selecting materials for use in that area.
4.2.2 Center sleeves. Center sleeves may be manufactured from carbon steel, stainless steel, or ductile iron, as described in the sections that follow. After forming, welding, or casting into a complete integral circle, the center sleeves must remain in a complete integral circle after manufacturing and testing processes have been completed.
4.2.2.1 Steel center sleeves. Steel center sleeves shall be formed from a material that meets or exceeds the requirements of ASTM A283/A283M, Grade C, for carbon steel, or ASTM A666, Type 304/304L, for stainless steel. Other grades of stel with equivalent or higher specified yield strength, such as those listed in ANSI/AWWA C200 and AWWA Manual M11, may be used. Sleeves made from mill pipe or tubing shall satisfy the material requirements of ANSIAWWA C200.
4.2.5.1 Similar materials. Similar materials shall be used for bolts, nuts, and washers (when used) to minimize the possibility of galvanic corrosion. Caution should be used in buried installations or where the environment is highly corrosive to ensure that the bolts and nuts are properly protected. Advice from a qualified corrosion engineer is recommended. Manufacturers shall provide bolts, nuts, and washers (when required) of suitable quality, workmanship, and yield strength to ensure compatibility with the coupling design and rated pressure. The purchaser may request the manufacturer's certification of bolting material, complete with physical, chemical, and dimensional details.AWWA C219-17 pdf download.