Wall thickness：16mm

Length：52.80m

Application：Rainwater and sewage pipe

Project Introduction：The pipe to be repaired was a DN2000 concrete rainwater pipe with a length of 52.80 meters. During the construction process, there was still flowing water in the pipeline.

Construction Challenge：

1. Due to the heavy weight of the large-diameter UV-CIPP liner, the liner may be twisted when it was lowered into the well. If the construction experience was insufficient, it may lead to curing failure;

2. For the repair of DN2000 pipes, strict control of pressure maintaining and walking time was required, which was a severe test for the UV curing lamp.