2011.4-2012.3 Yearbook of NILIM
Research Summary


Water Quality Control Department

Reference Number Y110201
Title Research on standardization about inspection methodology of sewer pipes
Start-End Date 2009.4-2012.3
Division Wastewater System Division
Author Head, Toshihiro YOKOTA
Senior Researcher, Wataru FUKATANI
Researcher, Toyohisa MIYAMOTO
Guest Researcher, Masahiro NOZAWA
Summary In advancing preventive maintenance type management, its attention was paid to the plastic pipe with which the judgment technique is not established. This research conducted a questionnaire, TV camera investigation, and an experiment, in order to extract the index at the time of judging plastic degradation.