Gulf South Pipeline Company (Gulf South) has asked the US Federal Energy Regulatory Commission (FERC) for authorization to improve the efficiency and reliability of its McComb Compressor Station located on Gulf South’s Index 130 mainline in Walthall County, Mississippi, USA.
Gulf South proposes to retire in-place one of the seven existing reciprocating compressor units at the station, as it has suffered mechanical damage; install one new Solar Taurus 70-T10802S centrifugal compressor (T70) package, including its required ancillary, auxiliary equipment, and yard and station piping; and place three of the six remaining reciprocating compressor units on standby.
The proposed modifications will result in an increase of certificated capacity of 48,000 dekatherms per day from Harrisville, Mississippi, receipts on Index 130 to deliveries on Gulf South’s existing Index 133 system. One primary improved point would be Gulf South’s Transco Walthall Interconnect in south Mississippi.
The McComb Compressor Station was originally certificated on February 26, 1951, for 8000 hp (5968 kW) of capacity via five 1600 hp (1193 kW) Worthington units. In 1953, Gulf South added two 1500 hp (1119 kW) Clark units. Today, the McComb Compressor Station consists of seven reciprocating compressor units (five Worthington units and two Clark units) totaling 11,000 hp (8206 kW).
According to Gulf South, one of the Worthington compressor units (Unit 3) suffered mechanical damage and can no longer be repaired. Gulf South proposes to retire the damaged compressor unit in-place and install one new Solar T70 package.
Due to the advanced age of the six remaining reciprocating compressor units, Gulf South proposes to operate only three of the six existing reciprocating gas compressors (one Worthington unit and two Clark units) with the T70 during the station’s full load capacity. The other three reciprocating units not in use would remain on standby, as operational spares, for use in the event of a planned or unplanned outage.