AWWA C218-16 pdf download.Liquid Coatings for Aboveground Steel Water Pipe and Fittings
4.2.1 General. Te six coating systems described in this standard are summarized in Table 1. Te primer, intermediate coat (where used), and the fn- ish coat shall be obtained from the same manufacturer. The name, address, and telephone number of the company that manufactures the coating shall be supplied.
When a coating or coating system described in this standard is referenced to federal, military, or other referenced standards, the reference phrase “comparable in performance to” shall mean that a proprietary coating or coating system will provide equal service when it is subjected to the equivalent service conditions for the same length of time as the referenced coating or coating system. The manu- facturer shall provide documentation consisting of laboratory test data or feld ser- vice data demonstrating that the proposed proprietary coating or coating system is equivalent to the referenced standard.
4.2.2 Coating System No. 1. Tis is a three-coat or optional four-coat system consisting of one coat or optional two coats of rust-inhibitive, pigmented alkyd primer, followed by an intermediate coat of alkyd coating and a fnish coat of alkyd or silicone-alkyd enamel. Te following coating systems are included:
Note: Troughout this standard, direct metric conversions (rounded) are set in parentheses next to US Customary units and are not necessarily the same as those listed in International Organization for Standardization (ISO) standards.
4.2.3 Coating System No. 2. Tis is a three-coat system consisting of a prime coat of two-component, rust-inhibitive, pigmented, catalyzed epoxy primer followed by an intermediate coat of catalyzed epoxy with a fnish coat of a two- component aliphatic polyurethane.
4.2.4 Coating System No. 3. Tis is a combination of an inorganic or organic zinc/epoxy/urethane system. It consists of a shop-applied inorganic or organic zinc-rich primer and a touch-up coat of organic zinc-rich primer or epoxy primer applied in the feld to repair coating damage. Te epoxy intermediate and aliphatic urethane fnish coatings are then feld-applied.AWWA C218-16 pdf download.