The gas piping system in a compressor station includes the valving, pulsation control equipment, overpressure protection devices, cathodic protection facilities and structural supports to route the gas through the compressor and gas conditioning facilities.Figure 6.7.53 shows a schematic diagram of such a system at a small compressor station.Figure 6.7.54 gives a general flow diagram for a storage/withdrawal compressor operation. In designing the piping system the following items must be taken into consideration: