Upstream vs. Downstream Oil and Gas Production: An Overview The terms upstream and downstream oil and gas production refer to an oil or gas company's location in the supply chain. Companies in the
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B31.3 - 2002 - Process Piping : Design of chemical and petroleum plants and refineries processing chemicals and hydrocarbons, water and steam. This Code contains rules for piping typically found in petroleum refineries; chemical, pharmaceutical,
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Oil has been used for lighting purposes for many thousands of years. In areas where oil is found in shallow reservoirs, seeps of crude oil or gas may naturally develop, and some oil could simply be collected from seepage or tar ponds.
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