Water distribution system (WDS) is an important part of urban water supply system ,which is not only a bridge linking water treatment plant with customer, but also accounts for 50~80 percent of total investment and 30~50 percent of energy consumption of the total water supply system budget.

government believed that the urban water supply system may also become a target of terrorist attacks, and required that the vulnerability analysis should be carried on when the service population of the system is more than 3300.

After many years of development,the Chinese city water supply systems can basically meet the requirements for urban production and life by their facilities,but there are some defects and weak links in public drinking water safety.

Network measurement and control for city water supply system based on virtual instrument technology;

The paper briefly introduces prefabricating process of rollingthermal isolated waterproof pipes which are laid without trough in the city heat supply pipeline and its joining machine elements.