In consideration of the shaft seal form and the strategies and risks of the pressure maintenance by shut-down of two SOLAR TITAN 130/C453 gas turbine/centrifugal compressor units in WKC1 Initial Compressor Station of the Trans- Asia Gas Pipeline, this paper reviews the program of compressor unit shut-down for pressure maintenance, the program of sealed gas supply and the interlocking equipment, and presents the optimization strategies for pressure maintenance by shut-down of the compressor units. Based on t...