PTT engages in the procurement, wholesale, and retail distribution of natural gas, as well as the marketing of products from gas separation plants. The Company also invests through PTT Group subsidiaries in businesses that utilize natural gas to enhance its value. Natural gas sourcing spans domestic gas fields, pipeline imports from neighboring countries, and the importation of Liquefied Natural Gas (LNG) to adequately meet the demand of major power producers, industrial customers through PTT’s natural gas pipeline distribution network, and the transportation sector through investments in NGV service stations. In addition, products from gas separation plants are used to create added value from natural gas in the Gulf of Thailand, supplying feedstock for the petrochemical industry and distributing Liquefied Petroleum Gas (LPG) as fuel for household, industrial, and transportation use.

PTT has also invested in LNG Receiving Terminals through PTTLNG Company Limited, a wholly-owned subsidiary, to support LNG import, storage, and regasification operations. In 2018, the capacity of LNG Receiving Terminal 1 was expanded from 10 million tons per year to 11.5 million tons per year. Construction of LNG Receiving Terminal 2 is currently in progress and will increase the total capacity to 19 million tons per year upon completion, which is expected in 2022.

The pricing structure for the natural gas wholesale and retail business is regulated under the Energy Industry Act B.E. 2550 (2007). The pricing framework for gas supplied to power producers, as well as the regulated return for gas transmission pipeline operations, is determined by the government. For industrial customers, the natural gas sales price is linked to international fuel oil prices to maintain competitiveness with alternative energy sources. Meanwhile, the pricing of petrochemical and petroleum products produced by gas separation plants and supplied to the petrochemical industry is determined by global market mechanisms.