In 1959, recognizing the increasing use of short radius buttwelding fittings not covered by ASA B16.9-1958, MSS developed Standard Practice SP-59. In 1963, this Standard was submitted to Subcommittee 6 (now Subcommittee F), the B16 group responsible for welded fittings, for consideration as a candidate American Standard. Following approval by the Committee, cosponsors, and ASA, the standard was published as ASME B16.28-1968.
In 1969, review of the document indicated that no changes were necessary. After reorganization of ASA, first as the United States of America Standards Institute (USASI), then as the American National Standards Institute (ANSI), with the Sectional Committee being redesignated as an American National Standards Committee, the reaffirmation was approved and published as ANSI B16.28-1964 (R1972). Subcommittee F then began a major revision to bring the standard up to date with current practice and usage. Metric dimensional equivalents were also added. Follow Standards Committee, cosecretariat, and ANSI approvalt, he revision was published as ANSI B16.28-1978.
In 1982, American National Standards Committee B16 was reorganized as an ASME Committee operating under procedures accredited by ANSI. In the 1986 edition, the text was revised and inch dimensions were established as the standard. Following approval by the Standards Committee and ASME, approval as an American National Standard was given by ANSI on November 12, 1986, with the new designation ASME/ANSI B16.28-1986.
Commencing in 1991, the subcommittee reviewed the document and made a number of revisions. The 80% factor used in the computed proof test pressure in earlier B16.28 editions was changed to 100% in this 1994 edition. After public review and approval by ASME, this edition was approved by ANSI on October 10, 1994.