History of API 650 Standard
The American Petroleum Institute can trace its roots back to World War I, where the government worked with domestic oil and natural gas companies to support the war efforts. In recognition of the need for consistency in supplying fuel throughout the country and to promote the interests of the petroleum industry, the American Petroleum Institute was created in 1919.
One lesson learned through independent oil companies working together in the war effort was that there was no uniformity of equipment. This was a big problem when the companies tried to pool their resources to build piping; the pipes and threading were different sizes. As a result, the American Petroleum Institute developed standards for all areas of petroleum equipment, including tanks for storage. API’s initial standards date back to the 1930s. The API 650 Standard that addresses the material, design, and fabrication of above ground petroleum storage tanks was first published in 1961. The Standard has since been revised frequently to keep pace with new technology and research on how to make above ground storage tanks safe to operate.