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1、NFPA 490 Code for the Storage of Ammonium Nitrate 1998 Edition National Fire Protection Association, 1 Batterymarch Park, PO Box 9101, Quincy, MA 02269-9101 An International Codes and Standards Organization The Standard is downloaded from Standard Sharing Copyright National Fire Protection Associat
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25、further explanation, see the Policy Concerning the Adoption, Printing, and Publication of NFPA Documents, which is available upon request from the NFPA.) The Standard is downloaded from Standard Sharing 4901 Copyright 1998 NFPA, All Rights Reserved NFPA 490 Code for the Storage of Ammonium Nitrate
26、1998 Edition This edition of NFPA 490, Code for the Storage of Ammonium Nitrate, was prepared by the Technical Committee on Hazardous Chemicals and acted on by the National Fire Protection Association, Inc., at its Annual Meeting held May 1821, 1998, in Cincinnati, OH. It was issued by the Standards
27、 Council on July 16, 1998, with an effective date of August 5, 1998, and super- sedes all previous editions. Changes other than editorial are indicated by a vertical rule in the margin of the pages on which they appear. These lines are included as an aid to the user in identifying changes from the p
28、revious edition. This edition of NFPA 490 was approved as an American National Standard on August 6, 1998. Origin and Development of NFPA 490 NFPA 490 was developed by the Technical Committee on Storage, Handling, and Trans- portation of Hazardous Chemicals and was tentatively adopted by the Associa
29、tion in 1963. It was further amended and again tentatively adopted in 1964. After further revision, it was offi- cially adopted in 1965. Amendments to NFPA 490 were adopted in 1967, 1969, and 1970. A complete revision was adopted in 1975, and several minor amendments were adopted in 1980 and 1985. T
30、he 1993 edition of NFPA 490 incorporated amendments to the document. These changes enhanced its enforceability through revision of nonmandatory language provisions and conformance with the NFPA Manual of Style. The 1998 edition of NFPA 490 incorporates amendments to the document that upgrade the cri
31、teria for automatic sprinkler protection, making them similar to the provisions for liquid and solid oxidizers as contained in NFPA 430, Code for the Storage of Liquid and Solid Oxidizers. The Standard is downloaded from Standard Sharing 4902STORAGE OF AMMONIUM NITRATE 1998 Edition Technical Commit
32、tee on Hazardous Chemicals John A. Davenport, Chair Industrial Risk Insurers, CT I John R. Anderson, Leslies Swimming Pool Supplies, CA U Anthony Andrews, Witco Corp., TX M Rep. Society of the Plastics Industry Inc. James E. Benge, Hercules Inc., DE U William J. Bradford, Brookfield, CT SE James L.
33、Daneker, Los Angeles City Fire Dept., CA E Rep. NFPA Fire Service Section Henry L. Febo, Jr., Factory Mutual Research Corp., MA I Charles L. Gibson, Gibson Technology Report of Investigations 6903, Further Studies on Sympathetic Detonation; and Report of Investigations 6773, Explosion Haz- ards of A
34、mmonium Nitrate Under Fire Exposure. On the basis of these reports a Table of Recommended Separation Distances of Ammonium Nitrate and Blasting Agents from Explosives or Blasting Agents has been developed (Table 6-4.2 of NFPA 495, Explosive Materials Code). While blasting agents should not be confus
35、ed with fertilizer products, extreme care should be taken to ensure that stored ammonium nitrate does not become sensitized by intimate mixing with carbonaceous, organic, or combustible material. Mixed fertilizers containing less than 60 percent ammo- nium nitrate are not covered by this code. With
36、proper precautions against fire and explosion, ammo- nium nitrate can be stored safely at the plant, in distributors warehouses, or on the farm. Chapter 1Scope and Definitions 1-1 Scope. 1-1.1 This code shall apply to the storage of ammonium nitrate in the form of crystals, flakes, grains, or prills
37、 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 ni
38、trate. 1-1.2 This code shall not apply to the transportation of ammo- nium nitrate. 1-1.3 This code shall not apply to storage under the jurisdic- tion of and in compliance with the regulations of the United States Coast Guard. 1-1.4* This code shall not apply to ammonium nitratebased blasting agent
39、s. 1-1.5 The storage of ammonium nitrate and ammonium nitrate mixtures that are more sensitive than allowed by the Definitions and Test Procedures for Ammonium Nitrate Fertilizer shall not be permitted by this code except on the specific approval of the authority having jurisdiction. 1-1.6 Nothing i
40、n this code shall apply to the production of ammonium nitrate or to the storage of ammonium nitrate on the premises of the producing plant, provided that no distinct, undue hazard to the public is created. 1-2 Purpose. The purpose of this code is to provide for the safe storage of all grades ammoniu
41、m nitrate containing 60 percent or more by weight of ammonium nitrate. 1-3 Definitions. Approved.* Acceptable to the authority having jurisdic- tion. Authority Having Jurisdiction.* The organization, office, or individual responsible for approving equipment, an installa- tion, or a procedure. Code.*
42、 A standard that is an extensive compilation of pro- visions covering broad subject matter or that is suitable for adoption into law independently of other codes and stan- dards. Labeled. Equipment or materials to which has been attached a label, symbol, or other identifying mark of an orga- nizatio
43、n that is acceptable to the authority having jurisdiction and concerned with product evaluation, that maintains peri- odic inspection of production of labeled equipment or mate- rials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance in a specifie
44、d manner. Listed.* Equipment, materials, or services included in a list published by an organization that is acceptable to the author- ity having jurisdiction and concerned with evaluation of prod- ucts or services, that maintains periodic inspection of The Standard is downloaded from Standard Shar
45、ing STORAGE OF BULK AMMONIUM NITRATE4905 1998 Edition production of listed equipment or materials or periodic eval- uation of services, and whose listing states that either the equipment, material, or service meets identified standards or has been tested and found suitable for a specified purpose. S
46、hall. Indicates a mandatory requirement. Should. Indicates a recommendation or that which is advised but not required. Chapter 2General Provisions 2-1 Application. This code shall apply to all persons, firms, corporations, co-partnerships, and associations storing, hav- ing, or keeping ammonium nitr
47、ate and to the owner or lessee of any building, premises, or structure in which ammonium nitrate is stored in quantities of 1000 lb (454 kg) or more. 2-2 Restricted Locations. 2-2.1 A permit shall be required from the authority having jurisdiction for the storage of 1000 lb (454 kg) or more of ammon
48、ium nitrate. 2-2.2 Not more than 60 tons (54.4 metric tons) of ammonium nitrate shall be stored unless the location and storage facility have been approved by the authority having jurisdiction. 2-2.3 Storage locations shall be subject to approval by the authority having jurisdiction with respect to
49、proximity of resi- dential occupancies, places of public assembly, schools, hospi- tals, railroads, and public highways. Limitations on storable quantities shall be considered with regard to proximity of these exposures and congested commercial or industrial dis- tricts. 2-2.4* Approval of large quantity storage shall be subject to due consideration of the fire and explosion hazards, including exposure to toxic vapors from burning or decomposing ammonium nitrate. 2-3 Structures. 2-3.1 Storag