(EnergyAsia, March 23, Monday) — China National Petroleum Corp (CNPC) has applied to state regulators to double the capacity of its upcoming 10-million-tonne-per-year refinery in Qinzhou in the southern Guangxi Zhuang Autonomous Region.CNPC has also submitted plans to build depots to store three million tonnes of crude and one million tonnes of refined products.China’s largest…