Cast Iron Flanges and Flanged Fittings for Refrigerant Piping
|Publication Date:||1 January 1948|
THE need for standardization of ammonia flanges was discussed as early as 1912. However, it was not until the spring of 1923 tluat the Sectional Committee on the Standardization of Pipe Flanges and Fittings (B16) orpnized a subtJroup of Subcommittee No. 1 on the standardization of ammonia flanges and fittings. At the same time the Refrigerating Machinery Association, now knowm as the Air Conditioning and Refrigerating Machinery Aaociation, Inc., appointed a committee on standardization, simplification, and elimination. In June of that year the manufacturer's committee appointed an official representat
In May, 1924, the subgroup of Subcommittee No. 1 on the standardization of ammonia flanges and fittings held its organization meeting. At this and the second meeting held in June, 1924, in members, representing the producer, user and aeneral interests. encouraged the manufacturen to take the lead.
This arrangement was agreed to by the Refrigerating Machinery Association, and it began by collecting from manufacturers detailed data covering dimensions of interchangeable features of ammonia fitting and valves. Composite drawings were made illustrating the variation of the dimensions of the principal parts of these data and duplicate copies were carefully studied by the association. In January, 1927, a progress report was sent to the members of the subgroup of subcommittee No. 1.
About that time the association's committee made a comprehensive study of the use of preferred numbers in setting series of standard sizes. Progress reports were issued in January, 1929, May, 1930, October, 1930. and May. 1931.
In January, 1931, the last progress report of the association's committee was redrafted in the American Standard form. In this form the proposed standard was reconsidered at a meeting of the Refrigerating Manufacturers Association in October 1931, and was adopted as a recommended practice. In December, 1931, it was formally presented to the members of the subgroup of Sectional Committee B16. By thus broadening the reviewing group some questions were raised which required detailed study so it was not until November, 1932, that the subgroup made its report to Subcommittee No. 1. At that time copies were went to a selected list of interested individuals. In general, the comments received were favorable. Then during the spring and summer of 1933 all the comments were studied by the chairmen of the Subcommittee and of the subgroup. In May, 1934 Subcommittee No. 1 released this proposal to the Sectional Committee for approval. However, at the specific request of the Refrigerating Manufacturers Association in 1935 this proposal was not passed on for final approval by Sectional Committee B16.
Responding to continued requests for the standardization of refrigerant flanges and fittings, the sponsors encouraged the appointment of a new subgroup of Subcommittee No. 1 to again study the refrigerating hitting situation, including the proposed standard.