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The American Petroleum Institute (API) is the only national trade association that represents all aspects of America’s oil and natural gas industry. Our nearly 400 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry. They are producers, refiners, suppliers, pipeline operators and marine transporters, as well as service and supply companies that support all segments of the industry. API standards are published to facilitate the broad availability of proven, sound engineer- ing and operating practices.API publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed. API is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations under local, state, or fed- eral laws. you can also find API STD 650,API STD 1104,API 510,API 570,ANSI/API RP 755,API SPEC 7,API SPEC 6D,PDF file API Petroleum Standards Download on our website!