# 2010 Vancouver
The successful development of a material depends on reliable test methods to evaluate its suitability for the end use conditions. The use of existing thermo oxidative chlorine resistance method may serve as a tool for evaluating the variability of chlorine resistance on materials of the same type as long as no significant scatter, stress dependency or temperature dependency of results is observed. However, this paper discusses limitations of the method when comparing performance of different hot and cold water polyolefine piping materials and if not correct test temperatures and/or hoop stresses are applied. New additional validation criteria and improvements of reporting requirements are discussed to secure correct use of thermo oxidative chlorine data.
Author(s) : Paschal, Hassinen
With the implementation of NSF Protocol P171 in 1999, and subsequent adoption of ASTM F 2023 in 2000, Miner’s Rule has been used extensively in developing estimations of crosslinked polyethylene (PEX) pipe lifetimes when exposed to varying system conditions in the presence of chlorinated water. Previous work in this...