192.206w Pipelines on private right-of-way of electric
transmission lines. Where gas pipelines parallel overhead electric
transmission lines on the same right-of-way, the company operating the
(a) Employ blow-down
connections and relief valve vents that will direct the gas away from the
study in collaboration with the electric company on the common problems of
corrosion and electrolysis, taking the following factors into consideration:
(1) The possibility of the pipeline carrying
either unbalanced line currents or fault currents.
(2) The possibility of lightning or fault
currents inducing voltages sufficient to puncture pipe coatings or
(3) Cathodic protection of
the pipeline, including location of ground beds, especially if the electric
line is carried on steel towers.
(4) Bonding connections between the pipeline
and either the steel tower footings or the buried ground facilities or the
ground-wire of the overhead electric system.
(c) Investigate the necessity of protecting
insulating joints in the pipeline against induced voltages or currents
resulting from lightning strikes. The protection can be obtained by connecting
buried sacrificial anodes to the pipe near the insulating joints or by bridging
the pipeline insulator with a spark-gap or by other effective