DUBAI, July 16 (Reuters) - Abu Dhabi National Oil Company (ADNOC) and Austria's Borealis will announce tenders for a new polypropylene plant in 2017, which will add 0.5 million tonnes annually, ADNOC said in a statement.

The two companies are building Borouge 4 complex, which is part of Borealis' joint venture withADNOC. Borouge 4 is expected to come on stream in 2023, ADNOC said on its twitter account. (Reporting by Aziz El Yaakoubi, editing by Louise Heavens)

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