A pipeline that has been replaced is typically decommissioned – safely removed from service – and maintained in place to minimize disruptions to the environment, our neighbors and existing pipelines. ExxonMobil Pipeline Company pipelines and facilities, whether active or inactive, are maintained in compliance with all applicable local, state and federal regulations. Our pipelines and facilities are protected using cathodic protection – an underground electrical current that mitigates potential corrosion – and routine remote and aerial monitoring of the rights-of-way. Pipeline markers remain in place to indicate the general location of a pipeline.
Residual fluids are removed from the pipeline.
Pipe interior is cleaned using specialized tools, or “pigs”.
The pipe is physically disconnected from active facilities.
Preserve & seal
The empty pipeline is filled with nitrogen and sealed to maintain its structural integrity. The sealed pipeline segments are left in place underground to minimize disturbance and reduce ground subsidence.