(plastemart) -- Shell Chemicals announced the successful first turnaround at the CSPCL - "Nanhai" petrochemicals joint venture complex in Guangdong, China. Nanhai is a joint venture with China National Offshore Oil Company (CNOOC). The turnaround was completed while simultaneously carrying out the debottlenecking of an ethylene cracker and process units. Both were finished ahead of time and within budget. Debottlenecking the ethylene cracker, ethylene oxide/ethylene glycols, and styrene monomer/propylene oxide process units will improve the site's competiveness by increasing capacity and reducing unit costs. After the debottlenecking, the annual ethylene capacity weShell Chemicals successfully completes first turnaround at Nanhaint from 800 kilotonnes per annum to 950 ktpa, with total petrochemical production capacity at the plant increasing from 2.3 million tons to 2.7 million tons.