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With almost half a century of continued development, Thaioil, which is the largest refinery in Thailand and can produce a variety of products including petroleum, petrochemical products, and lube base oil, has gone from a small 35,000 bpd refinery to a 275,000 bpd single-site refinery.

Today, Thaioil refinery has a petroleum refining capacity of approximately 12,000 million liters per year or about 21% of the nation’s overall refining capacity and capable of meeting the domestic demand for petroleum at 35%. As a complex refinery, the refining process involves various steps that take place in the crude distillation units, the upgrading units, and the quality improvement units, that make Thaioil becomes one of Asia-Pacific’s leading producers of high quality petroleum products.