Before revision: Metal Vacuum Joint, William R. Wheeler, Varian Associates, American Standards Association (ASA) A flange standard popularized in the United States is codified by the American National Standards Institute (ANSI), and is also sometimes named after the organization's previous name, the American Standards Association (ASA).
After revision: American Standards Association (ASA) A flange standard popularized in the United States is codified by the American National Standards Institute (ANSI), and is also sometimes named after the organization's previous name, the American Standards Association (ASA).