Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
Retrospective Evaluation of Cured-in-Place Pipe - (NEPIS)(EPA ...
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2009 Installations<br />
categorised by method<br />
Spiral<br />
Wound<br />
98.4km<br />
, 20.0%<br />
Other<br />
0.2km<br />
0%<br />
Pull <strong>in</strong> &<br />
Inflate<br />
285.8km,<br />
58.0%<br />
Inversion<br />
108.2km,<br />
22.0%<br />
Figure 8-4. Installations Categorized by Method and Diameter for 2009<br />
The rehabilitation systems available <strong>in</strong> Japan are licensed to contractors by domestic and <strong>in</strong>ternational<br />
system developers. Groups <strong>of</strong> licensees, <strong>in</strong>stallers, and companies <strong>in</strong> the materials supply cha<strong>in</strong> for given<br />
systems are usually organized together as rehabilitation system associations. Such associations <strong>in</strong> Japan<br />
may have as many as 500 members and contractors may belong to a number <strong>of</strong> associations depend<strong>in</strong>g on<br />
the systems they <strong>of</strong>fer. The associations provide a platform for technical and commercial activity for the<br />
members who may be relatively small local companies provid<strong>in</strong>g sewer ma<strong>in</strong>tenance capability to their<br />
municipalities.<br />
The JIWET was established by the M<strong>in</strong>istry <strong>of</strong> Construction <strong>in</strong> 1992 to undertake the research and<br />
development for new sewer construction and rehabilitation technologies and sewage treatment. It has had<br />
a particularly important role <strong>in</strong> evaluat<strong>in</strong>g and certify<strong>in</strong>g technologies <strong>in</strong> the rehabilitation field. JIWET<br />
provides teams <strong>of</strong> eng<strong>in</strong>eers to undertake the <strong>in</strong>vestigative work and organizes committees for evaluation<br />
<strong>of</strong> new construction and rehabilitation under the chairmanship <strong>of</strong> lead<strong>in</strong>g academics. Activity has grown<br />
substantially. In 2009, JIWET certified or renewed 52 new or improved technologies, <strong>in</strong>clud<strong>in</strong>g eight for<br />
pipe and manhole rehabilitation and three for pipe repair methods. Products and processes are reevaluated<br />
and certified after five years, subject to performance <strong>in</strong> use.<br />
The JPRQAA was launched <strong>in</strong> August 2006 and represents the <strong>in</strong>terest <strong>of</strong> the system providers and<br />
associations <strong>in</strong> connection with a variety <strong>of</strong> government agencies to have rehabilitation recognized as<br />
equivalent to replacement. The organization collects data on the activities <strong>of</strong> the system associations and<br />
is a technical resource for monitor<strong>in</strong>g <strong>in</strong>dustry quality and performance<br />
The Japan Sewer Collection Ma<strong>in</strong>tenance Association (JASCOMA) was set up <strong>in</strong> 1987 as an organization<br />
<strong>of</strong> 467 firms and 24 associations <strong>in</strong>volved <strong>in</strong> sewer clean<strong>in</strong>g, assessment, and rehabilitation. It has<br />
provided exam<strong>in</strong>ation and certification for technicians <strong>in</strong>volved <strong>in</strong> pipe ma<strong>in</strong>tenance s<strong>in</strong>ce 1998 and, <strong>in</strong><br />
2003, it set up a scheme to <strong>in</strong>spect and certify contractors.<br />
122<br />
301-800m<br />
m,<br />
136.0km ,<br />
27.6%<br />
2009 Installations<br />
categorised by diameter<br />
>800mm<br />
63.4km,<br />
12.9%<br />
< 300mm,<br />
293.2km,<br />
59.5%