(1) All the connection work can be carried out from the inside of the pipe, without opening trenches and digging canals, and the interface protruding is small, so it can safely pass through the ground buildings and underground pipelines, and the space between the inside of the tunnel and the outside of the pipe becomes smaller, saving a lot of investment and time.
(2) There is no need to consider fire or electricity when connecting pipes in the tunnel, so it can work more robustly.
(3) Because it is a mechanical interface, the installation work is simple and fast. And the harm and impact of vibration are greatly reduced. Due to the high flexibility of the mechanical interface of the ductile iron pipe, this pipe can also be used to lay pipes in the curved part of the tunnel.
中文
ENGLISH