Abstract: The implementation of overpressure prevention function of Enbridge Inc. total pressure protection system relies on the total pressure contro (l TPC) module of pipeline SCADA system. The system is specialized to protect possible overpressure problems. It has various types of pipeline pressure protection logics which are classified into two levels, i.e. pump station level and pipeline level. The former is executed by station controlled PLC. In the meantime, the alarm is monitored by the operator working at progressive control systems (PROCYS) working station. The latter monitors the pressure point along the pipeline by PROCYS. A series of commands will be dispatched if the pipeline is needed to protect, including dynamically adjusting the maximum outlet pipeline pressure threshold, total length pressure protection when power is shut down, pipeline shutdown protection and the whole pipeline shutdown protection. By comparing the main protection functions and the domestic pressure protection system, the paper puts forward the direction and suggestion for the system design of domestic pipeline pressure protection system.