Abstract: Reagent containing reactive chlorine was sealed in PVC，PE or other plastic pipes and the migration of organic species out of the pipe was monitored. The release amount of total organic carbon species（TOC）were determined continuously by a combustion TOC analyzer in environments of different chlorine content, temperature, and from various plastic pipes. It was found that higher temperature and higher reactive chlorine content resulted in higher rate of degradation of plastic pipe. From the experimental, a service performance evaluation method of plastic tubular material was established.