China National Petroleum Corp. says Line C of the Central Asia-China Gas Pipeline became operational May 31 with the turn of a valve in Uzbekistan to receive gas from Turkmenistan.

The 1,830-km line runs parallel with Line A and Line B. It enters China at Horgos, Xinjiang, to link with the Third West-East Gas Pipeline.

Construction of Line C began in September 2012. CNPC said Line C will reach its designed annual deliverability of 25 billion cu m upon completion of all its supporting facilities by the end of 2015.

By then, the overall delivery capacity of the Central Asia-China Gas Pipeline will reach 55 bcm/year. CNPC said that would equal 20% of China’s natural gas consumption.