AWWA JAW65528

Elastomeric materials are commonly used in water distribution systems. However, when these materials are exposed to chloramines, rapid degradation has been observed. Consequently, it is important to consider how these materials degrade (swelling, strength, elongation) when selecting the appropriate materials to use in water systems. The purpose of this study was to assess degradation characteristics and develop life prediction models for elastomeric materials exposed to chloramines. Based on the testing, it is clear that elastomer materials have unique reactions to chloramine-induced degradation. It is therefore necessary to match the necessary elastomer performance (elongation, swelling, strength) characteristics with considerations regarding long-term degradation. By matching the degradation trends with intended use, elastomeric- based failures can be reduced in the future. The results of this research will help water utilities select more appropriate elastomeric components for use in their systems. Ultimately, this will benefit the supplier and the rate payer through better performing materials and longer design lives. Includes 22 references, tables, figures.