| 摘要 |
In the interests of environmental protection, monitoring the sealing of pipes with their mouldings and structures in the open and in the ground is becoming ever more important. Therefore the walls of the pipes (2) and structures is formed with at least one uniform layer (4.1) of an electrically conductive thermoplastic material extending over the entire circumference and length. The electrically conductive layer (4.1) is connected via cables (5.1) to one pole of a high-ohmic electric monitoring device, the other pole of which is connected to a counter-electrode extending parallel to the electrically conductive layer (4.1). Making the electrically conductive layer of thermoplastic material, especially HDPE, has the advantage that this layer has the same chemical resistance as the ordinary plastic of which such pipes, mouldings and structures consist. For these reasons the conductive layer (4.1) is not adversely affected or destroyed by the surrounding medium in case of leakage and can be easily repaired at the point of a leak in the same way as the rest of the pipe wall. |
