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NFPA 490 applies to the storage of ammonium nitrate in the form of crystals, flakes, grains, or prills including fertilizer grade as defined by Definitions and Test Procedures for Ammonium Nitrate Fertilizer, dynamite grade, nitrous oxide grade as defined by Standard for Ammonium Nitrate (Nitrous Oxide Grade), technical grade, and other mixtures containing 60 percent or more by weight of ammonium nitrate.
This Code gives requirements for storage structures, storage in containers and bulk storage, and separation from contaminants. Additionally, this document covers section fire protection and general safety precautions including housekeeping and material handling. (Approx. 11 pp., 2002)
NFPA 490 Code for the Storage of Ammonium Nitrate 2002 Edition
Chapter 1 Administration
Chapter 2 Referenced Publications
Chapter 3 Definitions
Chapter 4 General Provisions
Chapter 5 Storage of Ammonium Nitrate in Bags, Drums, or Other Containers
Chapter 6 Storage of Bulk Ammonium Nitrate
Chapter 7 Contaminants
Chapter 8 General Precautions
Chapter 9 Fire Protection
Annex A Explanatory Material
Annex B Properties and Uses of Ammonium Nitrate
Annex C Suggested Fire-Fighting Procedure
Annex D Suggested Provisions for Municipal Legal Regulations
Annex E Informational References