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Content DescriptionThis standard describes protective interior coatings for valves used for water supply, wastewater collection and treatment, and reclaimed water service having a pH range from 4 to 9 and for hydrants used for water supply service. The standard describes the material, application, and performance requirements for these interior coatings. The coating shall not contain coal tar. These coatings are applied for protection of ferrous surfaces of valves and hydrants. 1.1.1 Special coating conditions. 1.1.1.1 Exterior coatings. It is normal commercial practice for the coating applicator to apply this coating to the exterior surface of resilient seat gate valves and hydrant components. It should be recognized that the performance requirements for exterior service may vary from those specified for interior use because of differences in exposure conditions. 1.1.1.2 Internal hydrant coatings. This standard covers interior hydrant coatings in areas designed for constant contact with water supply. It does not cover internal coatings of dry-barrel hydrants on areas downstream of the main valve. 1.1.1.3 Special service conditions. The purchaser and the manufacturer shall agree on special coating requirements prior to manufacturing of product if special service conditions exist. Special service conditions may include salt water, acid, high temperature, wastewater, or reclaimed water. Coatings for these special service conditions may or may not conform to this standard.Subscription InformationMADCAD.com AWWA Standards & Manuals subscriptions are annual and access is concurrency based (number of people that can access the subscription at any given time).
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About AWWAEstablished in 1881, the American Water Works Association is the oldest and largest nonprofit, scientific and educational organization dedicated to safe and sustainable water in the world. With more than 50,000 members worldwide and 43 Sections in North America, AWWA advances public health, safety and welfare by uniting the efforts of the entire water community. AWWA Offers education to water professionals Advocates for safe and sustainable water Collects and share knowledge Creates volunteering opportunities |
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