Two main pipelines are included in the system. The Stah/Mereksen Pipeline, 60 kilometers long and 16 inches in diameter, transports gas from two producing fields to the Alrar plant. The pipeline is designed for a pressure of 96.7 bars at 71.1 degrees C. A 10-inch diameter, 45-kilometer condensate pipeline runs between Alrar and an existing pipeline at Ohanet. Designed for a pressure of approximately 69 bars, it can deliver up to 11,300 Nm3/day of hydrocarbon condensate.
The gas gathering system at the Alrar field collects gas, which is corrosive due to the presence of carbon dioxide and free water, from 22 production wells and delivers it to the treating plant battery limits. The approximate total length of the gathering system is 75 kilometers. Pipe diameters range in size from 30 inches at the plant inlet to 14 and 16 inches at individual trunk branches.
A gas reinjection system delivers dry residue gas from the treating plant for injection into 23 field wells through a network of pipelines and headers. With an approximate length of 63 kilometers, the system is designed for pressure of 320 bars.
The pipeline facilities feature a comprehensive telecontrol-telecommunications system. This system telemeasures flow rate, pressure and temperature. It also provides direct access between the treating plant and each well by telephone, and allows each well to be shut from the plant control room. The pipeline is protected from external erosion by a cathodic protection system.