Saudi Arabia's PetroRabigh will launch the bidding process on Monday to build new units, including one to produce clean fuel, at its petrochemical and refining complex in Rabigh, said the company.

It will launch engineering, procurement and construction (EPC) tenders for a polyether polyols plant with a capacity of 220,000 tonnes per year, a 17,000 barrels per day naphtha treating unit to produce clean fuel and a 106,000 tonnes per year sulphur recovery unit (SRU), it said in a bourse statement.

If the bids are approved work would start in the second half of 2016, the company, a joint venture between Saudi Aramco and Japan's Sumitomo Chemical, said.

It did not give a value for the project.

In June, industry sources told Reuters PetroRabigh planned to build the units with contracts likely to be awarded in the first quarter of 2016.-Reuters