The company has already shipped 37 oil pressure tanks and five heat exchangers weighing 750 tonnes overall under the contract.
These equipment pieces are of the third batch sent to Aegean, who ordered a total of 76 pressure tanks and nine heat exchangers under a pact sealed in July 2014.
Doosan Vina is mobilising 70% of its workforce to work on the fourth batch of ten pressure tanks and four heat exchangers to be shipped by March 10.
Aegean is capable of processing 214,000 crude barrels on a daily basis.
Doosan Heavy Industries Vietnam (Doosan Vina) is fully invested by the Republic of Korea and its CPE plant is located in the Dung Quat Economic Zone, central Quang Ngai province.