The American Petroleum Institute (API) issued an updated pressure-relieving design and installation standard to enhance refinery safety. The sixth edition of API Standard 520, Part II on Installation, which was published in March this year "will enhance refining safety by helping companies design and install state of the art pressure relieving devises at oil and petrochemical refineries," says API director of standards, David Miller.

Two complementary pressure-relieving standards were also extensively revised and published in 2014:

  • The Ninth Edition of API Standard 520, Sizing, Selection and Installation of Pressure-relieving Devices, Part I, for use in refineries, chemical facilities and related industries, published in July 2014.
  • The Sixth Edition of API Standard 521, Pressure-relieving and Depressuring Systems, for use primarily in oil refineries, but also applicable to petrochemical facilities, gas plants, liquefied natural gas (LNG) facilities and oil and gas production facilities, published in January 2014.

The API standards program has grown from the first published standard in 1925 to more than 600 standards and technical reports. The program is accredited by the American National Standards Institute (ANSI), the authority on U.S. standards.

More than 130 API standards have been incorporated in government regulations, and API undergoes regular third-party audits to ensure the program meets ANSI's essential requirements for openness, balance, consensus and due process.

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