The storage may be geological (underground) or in tanks. To be traded as a commodity, all gas entering the pipeline system has to be treated to limit impurities (dry gas). The gas pipelines are pressurized, the high-capacity lines have pressure over 100 bar. Automatic gas leak detection and location systems are important for pipelines to avoid loss, ensure safety, and prevent greenhouse gas emission,45 the same systems are useful for reducing loss and speeding recover)' in case a pipeline is damaged for any reason, including sabotage.