The Fragant power plant group is located in the Möll valley of the Tauern mountains in Austria and is operated by Kärntner Elek- trizitäts AG (KELAG). It is the company’s core for generating power and a mainstay for safe and reliable power supply in the federal province of Carinthia.

Prior to processing natural gas from its pure form into liquid natural gas (LNG), undesirable components such as solids, mineral oil coal particles and heavy hydrocarbons are largely removed. Nevertheless, small quantities of these components can reach the compressors installed at the end of the purification process and which transport the natural gas into the pipeline to the liquefaction plant.

This article addresses the normal and excessive leakage rates of mechanical seals in main pipeline pumps that transport Natural Gas Liquids such as ethane, propane, butane and various mixtures of these liquids.