The outage of the 84,000 barrel-per-day FCC unit is expected to last two to three weeks, and may affect some September-loading gasoline cargoes, said company spokesman KY Lin.

"Crude oil refining will not be affected at the refinery. We will store the feedstock while the FCC unit is under maintenance," said Lin, adding that loadings of September-diesel cargoes will also be unaffected.

(Reporting by Muyu Xu in Singapore and Mohi Narayan in New Delhi; Editing by Kirsten Donovan)