Japan’s JGC signed a deal valued in the range of $100 to $200 million to expand an ethane cracker for a petrochemicals complex owned by Saudi Aramco and Japan’s Sumitomo Chemical, an industry source said. A JGC spokesman declined to comment on the deal for the unit, known as RP1. The contract’s value is between $100 and $200 million, said the source who spoke on condition of anonymity because the matter was not yet public.