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b, FOREWORD (This Foreword is not apart of American National Standard Safety Requirements for the Storage and Handling of Anhydrous Ammonia, K61.1-1981.) This standard represents the consensus of interested parties concerning minimum safety requirements for the storage, transportation and handling of anhydrous ammonia. It is intended to serve as a guide for regulatory authorities in writing their own regulations as well as to assistdesigners of ammonia installations and others having an interest in its requirements such as safety engineers, insurance organizations and transportation carriers. The first edition of the K61.1 Standard was published in 1960 and was based on a standard of the Compressed Gas Association, Inc. completed in 1950 and submitted to the then American Standards Association for adoption as an American Standard.The CGA standard was used to assist in developing regulations during the early period of the expanded use of anhydrous ammonia for agricultural purposes.This took place in the late 40's and early 1950's. In 1953 the Agricultural Ammonia Institute(AAI)published its first standard(M-1)for the storage and handling of agricultural ammonia which has been revised at frequent intervals to remain current with progress in the agricultural ammonia industry. When the first American Standard for ammonia was approved in 1960, it made available to those concerned two standards on ammonia from which to choose.Many of the states had already adopted as their regulations the M-1 standard of the AAI and from then on the ammonia industry was continually faced with the conflict of having two differing standards available dealing with safety requirements for anhydrous ammonia. The American Standard was revised in 1966 under the sponsorship of the Compressed Gas Association, Inc. and the second edition was made available to interested parties along with revised Aitions of the similar standard of AAI. In 1968, the Agricultural Nitrogen Institute(ANI)successor to AAI, requested co-sponsorship of the K61 project. CGA supported co-sponsorship in order to achieve the endorsement of a single American National Standard that could be supported jointly by ANI and CGA. The Agricultural Nitrogen Institute has since merged with the National Plant Food Institute to become The Fertilizer Institute(TFI). As co-secretariats of the K61 Project, CGA and TFI reconciled the differences between the American National Standard K61.1-1966 and the M-1 Standard of The Fertilizer Institute.A revision was prepared and submitted to the K61 Committee for consideration. The 1972 and subsequent editions of the K61.1 Standard not only replace the 1966 edition of the American National Standard K61.1,but also supersede the 1966 edition of CGA Pamphlet G-2.1 and the 1968 edition of The Fertilizer Institute M-1 Standard. Suggestions for improvement gained in the use of this Standard will be welcome.They should be sent to the American National Standards Institute, Inc., 1430 Broadway,New York,N.Y. 10018,or to either of the co-secretariats, the Compressed Gas Association, Inc., 1235 Jefferson Davis Highway, Arlington, Va. 22202,or The Fertilizer Institute, 1015 18th Street, N.W., Washington, D.C. 20036.