An entity or organization responsible for the operation, management, and maintenance of a pipeline systemAll portions of the physical facilities through which liquid or gas moves during transportation. This includes pipe, valves, and other appurtenances attached to…. The operatorAn entity or organization responsible for the operation, management, and maintenance of a pipeline system. The operator is entrusted with ensuring the safe, rel… is entrusted with ensuring the safe, reliable, and efficient transportation of substances, such as oil, gas, waterAn inorganic compound of hydrogen and oxygen. Used in non-destructive testing as a penetrant and as a medium for testing., or other fluids, through the pipeline network.