The planned works are expected to occur from Sunday, May 9 for about 29 days.
Production manager of downstream operations Rohan Richardson said the safety of personnel, plant and local community was their priority.
“COVID-19 controls will be in place to ensure safety and compliance including, as always, prioritised hire of Gladstone locals for additional, short-term roles,” he said.
Mr Richardson said there may be intermittent flaring and potentially some smoke at times during the shutdown period.
“When the maintenance work is complete, the flare will return to its normal operation,” he said.