The 400,000 barrels per day full-conversion refinery located in Yanbu, a major Red Sea port in the Al Madinah province of western Saudi Arabia, will be shut down in March 2013, and is expected to take about 45 to 50 days to complete the maintenance work.
Upon completion, the refinery is anticipated to produce cleaner fuels, reported Trade Arabia.
The two companies together have invested about $2.5bn to upgrade the facility, which mostly exports gasoil and gasoline.
Built at an estimated cost of $12bn, Yanbu refinery is spread over an area of 5.2 million square metres.
