API Standard - API is the American Petroleum Institute (American Petroleum Institute) the English abbreviation. API was built in 1919, is the first national business associations in the United States, is the world's first and most successful standards of the Chamber of Commerce.

One of the key tasks of the API is to be responsible for the standardization of equipment for oil and gas industry equipment to ensure the safety, reliability and interchangeability of the equipment used in the industry. The development of coordination standards is one of the earliest and most successful projects in the API. Since the first standard was released in 1924, the API has now released 500 standards. API is an ANSI-accredited standard-setting body whose standards are developed in accordance with ANSI's harmonization and development guidelines, and APIs are jointly developed and published in conjunction with ASTM. In addition, APIs actively participate in the development of ISO standards for global industry, ISO / TC 671SC9 Wellhead Equipment and Pipeline Valve Secretariat. API standards are widely used not only in domestic companies, but also by US federal and state laws and regulations, as well as the Ministry of Transport, the Ministry of Defense, the Occupational Safety and Health Administration, the US Customs, the Environmental Protection Agency, the US Geological Survey and other government agencies, and But also in the world by the ISO, the international legal system of measurement and more than 100 national standards cited.

API standards are mainly defined equipment performance, and sometimes include design and process specifications, standard development areas including oil production, refining, measurement, transportation, sales, safety and fire prevention, environmental regulations, and its information technology standards, including oil and gas industry EDI , Communications and information technology applications and so on.
API in the United States and other countries in the world have enjoyed a high reputation, it is the US Department of Commerce and the US Trade Commission recognized the oil machinery certification body. It has developed petrochemical and oil extraction machinery technical standards adopted by many countries, the Middle East, South America and many Asian countries in the tender procurement of petroleum machinery, the general requirements of the API logo products eligible to participate in the tender. Therefore, oil machinery with API logo is not only considered to be reliable and advanced. At present, there are members from all over the world, including all aspects of exploration and production, transportation, refining and marketing. Today, the API has evolved into an integral part of the world's oil industry, not only in the United States, but also increasingly.