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AWWA C210 Liquid-Epoxy Coatings and Linings

The AWWA C210 standard serves as a comprehensive reference for the application of liquid epoxy coatings and linings on steel water pipes and fittings, providing detailed specifications to ensure effective corrosion protection and preservation of water quality. Here's a more detailed description:

1. Materials: AWWA C210 outlines requirements for the materials used in liquid epoxy coatings and linings, including the composition of the epoxy resin, curing agents, and additives. These materials are selected for their compatibility with steel substrates, resistance to corrosion, and ability to withstand the environmental conditions encountered in water distribution systems.
2. Application Methods: The standard specifies approved methods for applying liquid epoxy coatings and linings to steel surfaces, including techniques such as spraying, brushing, or roller application. Proper application methods are crucial for achieving uniform coverage, proper adhesion, and the desired coating thickness.
3. Thickness Requirements: AWWA C210 defines minimum and maximum thickness requirements for liquid epoxy coatings and linings, ensuring adequate protection against corrosion while avoiding excessive buildup that could lead to handling difficulties or reduced flexibility. These thickness requirements are tailored to the specific operating conditions and service life expectations of the water distribution system.
4. Surface Preparation: The standard includes guidelines for surface preparation prior to applying liquid epoxy coatings and linings, such as cleaning, degreasing, and abrasive blasting to remove rust, scale, and other contaminants. Proper surface preparation is essential for promoting adhesion and maximizing the effectiveness and longevity of the coating system.
5. Quality Control Measures: AWWA C210 outlines quality control measures to ensure the integrity and reliability of liquid epoxy coatings and linings, including requirements for batch testing of coating materials, inspection of applied coatings for defects or irregularities, and adherence to specified performance criteria. These measures help verify compliance with the standard's requirements and ensure consistent coating performance.
6. Field Repair: The standard may also include provisions for field repair of liquid epoxy coatings and linings, outlining procedures for addressing damage or defects that occur after initial application. Proper repair methods help maintain the integrity of the coating system and extend the service life of steel water pipes and fittings.
7. Health and Safety: AWWA C210 emphasizes the importance of health and safety considerations during the application of liquid epoxy coatings and linings, including guidelines for handling, storage, and disposal of coating materials, as well as measures to protect workers from potential hazards associated with coating application.