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American Petroleum Institute (API)
The American Petroleum Institute, commonly referred to as API, is the largest U.S trade association for the oil and natural gas industry. It claims to represent about 400 corporations involved in production, refinement, distribution, and many other aspects of the petroleum industry. API distributes more than 200,000 copies of its publications each year. The publications, technical standards, and electronic and online products are designed, according to API itself, to help users improve the efficiency and cost-effectiveness of their operations, comply with legislative and regulatory requirements, and safeguard health, ensure safety, and protect the environment. Each publication is overseen by a committee of industry professionals, mostly member company engineers.