Convert Heavy Gas to Olefins Feedstock Project was ordered by PTT Global Chemical, an affiliate of PTT, which is Thailand’s state-owned petroleum and gas company. POSCO E&C implemented the turn-key project to comprehensively handle engineering, procurement, installation, and commissioning (EPCC) operations. With the project site located in Map Ta Phut Industrial Estate of Rayong in the southern part of Thailand, this project aimed at increasing ethanol and propane production volume by expanding the existing facilities..