The Dongjiang water mains are a major supply of fresh water from mainland China to Hong Kong.  The existing water mains were found to have deteriorated after years in service and required rehabilitation.  The Tyfo® Fibrwrap® system have passed the vigorous testing required by Water Supplies Department and is proven to be able to strengthen pipes for both fully-structural and semi-structural scenarios.  In this project, rehabilitation using Tyfo® Fibrwrap® system is carried out to more than 6km of water mains, size ranging from 1200mm to 2300mm diameter. 

The scope of works included the following:

• Survey for existing pipe conditions
• Pipe rehabilitation design
• Installation of the Tyfo® Fibrwrap® Composite System for pipe rehabilitation