...May 7, 2019 SINGAPORE (S&P Global Ratings) May 7, 2019--S&P Global Ratings today raised its long-term issuer credit ratings to '###+' from '###' on PTT Global Chemical Public Co. Ltd. (PTTGC) and Thai Oil Public Co. Ltd. (Thai Oil). The outlook is stable. We also raised our local currency issuer credit rating on PTT Exploration and Production Public Co. Ltd. (PTTEP) to 'A-', from '###+', with a stable outlook and affirmed the '###+' foreign currency issuer credit rating on the company. At the same time, we raised our foreign currency issue ratings on U.S. dollar-denominated notes issued or guaranteed by Thai Oil and PTTGC to '###+' from '###'. We also raised our local currency issue rating on Thai Oil to '###+' from '###'. We affirmed the foreign currency issue ratings on the various debt instruments PTTEP has issued or guarantees, including that on the company's perpetual notes. The stand-alone credit profiles (SACP) are unchanged at '###' for PTTEP and '###-' for both PTTGC and Thai Oil....