PTT Public Company Limited or simply PTT is a Thai state-owned SET-listed oil and gas company, formerly known as the Petroleum Authority of Thailand.

PTT is one of the largest corporations in the country and also the only company from Thailand listed in Fortune Global 500 companies. PTT Public Company Limited and Pertamina, Indonesia's state-owned oil company, partnered to build a new petrochemical complex in Indonesia for an estimated cost of US$4–5 billion.


It owns extensive submarine gas pipelines in the Gulf of Thailand, a network of LPG terminals throughout the kingdom, and is involved in electricity generation, petrochemical products, oil and gas exploration and production, and gasoline retailing businesses.


As of today, the overall quality program of PTT is directly under the Quality Management Department while SHE activities take in more responsibilities i.e. unforeseen security issues such as terrorist or riots. Hence, the name was changed to Safety, Security, Health and Environment Department (SSHE).


In 1997, PTT designated a vision and strategy under the new title but the principles of “Productivity Improvement: PI, remained the same. Under such scheme, the Japanese Kaizen approach referring to continuous improvement was adopted. The Company picked up a slogan of “Today must be better than yesterday and tomorrow will be better than today”.


PTT is committed to maintaining a good standing corporate status in Thai society by exercising environment stewardship of internationally accepted standards and helping to improve the quality of life for the community and society.

• Its affiliated companies include PTT Exploration and Production, PTT Global Chemical, PTT Asia Pacific Mining,and PTT Green Energy.


• The company operates 58 retail stations in the Philippines and plans to add an additional 15-20 petrol station in Luzon and the Visayas, in Cebu Province.


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