The Kemya joint venture of Saudi petchems giant Sabic and international oil major ExxonMobil has announced mechanical completion and the start of commissioning of a 400,000 tons/year elastomers plant at Jubail on Saudi Arabia’s Gulf Coast.

The plant was built at a total cost of $3.4bn, under an engineering, procurement and construction contract awarded by Kemya in June 2012 to Korea’s Daelim Industries, France’s Technip and Spain’s Tecnicas Reunidas. Sabic says the...