Report-Of Committee on Chemicals and Explosives
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448 REPORT OF COMMITTEE ON CHEMICALS AND EXPLOSIVES CE-1 Report-of Committee on Chemicals and Explosives Correlating Committee Dr. Robert W. Van Dolah, Chairman, Pittsburgh Mining and Safety Research Center, Bureau of Mines, U.S. Department of the Interior, 4800 Forbes Ave., Pittsburgh, PA 15213 Chester I. Babeock,~ Secretary, National Pire Protection Assn., 470 Atlantic Ave., Boston, MA 02210 W. H. Doyle, Simsbury, CT ilenry T. Rlttman, Institute of Makers of •, Thomas E. Duke, Fire Prevention & Engi- Explosives neering Bureau of Texas Richard F. Schwab, Allied Chemical Corp. Dr. Richard Y. Le Vine, Olin Corp. tNonvoting. Sectional Committee on Electrical Equipment in Chemical Atmospheres Dr. Richard Y. Le Vine, Chairman, Olin Corp., 120 Long Ridge Rd., Stamford, CT 06904 Chester I. Babcock,~ Secretary, National Fire Protection Association, 470 Atlantic Ave., Boston, MA 02210 L. J. Hall. Panel No. 14, National Electrical R. F. Schwab, Morristown, NJ Code Committee W. A. Short, National Electrical-Manu- • Robert P. llowell, American Petroleu~i In" facturers Assn. stitute George O. Hunt, Jr., Manufacturing Chem- Alternates. ists' Assn. Elton L. Lltehfleld, Pittsburgh, PA F. D. Alroth. (Alternate to P. J. Schram) Frederick L. Maltby, Instrument Society W. Calder (Alternate to F. L. Maltby) of America W. H. Levers (Alternate to Robert P. C. E. Miller, Norwood, MA Howell) " Frank E. Rademacher, Chicago, IL J. Rennle (Alternate to C. E. Miller) John E. Rogerson. Cincinnati, OH Thomas S. Staron, (Alternate to Frank E. P. J. Schram, Chicago, IL Rademaehcr) tNonvoting 449 CE-2 EXPLANATION OF REPORT Sectional Committee on llazardous Chemical Reactions R. F. Schwab, Chairman, Allied Chemical Corp., P.O. Box 1057R, Morristown, NJ 07960 Chester I: Babcoek,t Secretary, National Fire Protection Association, ,t70 Atlantic Ave., Boston, MA 02210 A. R. Albrecht, Midland, MI Francis W. Wischmeyer, Manufacturing Edward Cherowbrier, Prince George's Chemists' Assn. Center, Hyattsville, MD William J. Wlswesser, Fort Derrick, lloward H. Fawcett, Washington, DC Frederick, hal) Samuel A. Kaplan, New York, NY Alternates Frank O. Llndemann, Morristown, NJ James E. Collier, (Alternate to G. W. George W. Moore, Hartford, CT M oore) Dr. Robert W. Van Dolah, Pittshurgh, PA F. W. Badger, (Alternate to S. Kaplan) tNonvoting. Sectional Committee on Properties of Ilazardous Chemicals Thomas E. Duke, Chairman, Fire Prevention & Engineering Bureau of Texas, 1320 Mercantile Securities Bldg., Dallas, TX 75201 Chester !. Babeock,t Secretary, National Fire Protection Association, 470 Atlantic Ave., Boston, MA 02210 A. R. Albrecht, Midland, MI Ens. David A. Rltkonen, Washington, DC William J. Bradford (Mannfacturing James Saylor, American Insurance Assn. Chemists' Assn.) Norman V. Steere, Minneapolis, MN Edward Cherowbrler, Prince George's Center, Hyattsville, MD Dr. Robert W. Van Dolah° Pittslmrgh, PA R. E. Dufour, Northbrook, IL A. F. White, Conference of Special Risk R. M. Grazlano, Washington, DC George Huckeba, American Mutual In- Alternates. surance Alliance Dr. James E. Long, American Industrial Marvin W. Blaekman (.Alternate to James Hygiene Assn. Saylor) Franklin A. Miller, Rochester, NY C. W. Scbultz (Alternate to R. M. Graziano) tNonvoting. This list represents the membership at the time the Committee was balloted on the text of this edition. Since that time, changes in the membership may have occurred. The report of the Committee on Chemicals and Explosives is in three parts: Part I, prepared by the Sectional Committee on Properties of Hazardous Chemicals, proposes adoption of amendments of Haz- ardous Chemicals Data, NFPA No. 49-1973. Part I has been submitted for ballot to the Sectional Committee on Prop- erties of Hazardous Chemicals, which consists of 14 voting members, of whom all have voted affrmativel),. 450 REPORT OF COMMITTEE ON CHEMICALSAND EXPLOSIVES CE-3 Part I has also been submitted for ballot to the Correlating Committee, which consists of six voting members of whom 6 have voted affirmatively. Part II, prepared by the Sectional Committee on Electrical Equip- ment in Chemical Atmospheres, proposes adoption of a Recom- mended Practice for Classification of Class I Hazardous Locations for Electrical Installations, NFPA No. 497-P. Part II has been submitted for ballot to the Sectional Committee on Electrical Equipment in Chemical Atmospheres, which consists of 12 voting members, of whom 17 have voted affirmatively. One ballot was not re- turned (E. L. Litchfield). Part II has also been submitted for ballot to the Co~relating Committee, which consists of 6 voting members, of whom 6 have voted affrmatively. Part III, prepared by the Sectional Committee on Hazardous Chemical Reactions, proposes amendments of the Manual of Hazardous Chemical Reactions, NFPA No. 491M-1971. Part III has been submitted for ballot to the Sectional Committee on Hazardous Chemical Reactions, which consists of 70 voting members, of whom 10 have voted affirmatively. Part III has also been submitted for ballot to the Correlating Committee, which consists of 6 voting members, of whom all have voted affirmatively. 451 REVISIONS TO NFPA NO. 49 49-1 Part I Proposed Amendments of Hazardous Chemicals Data NFPA No. 49~ 1973 1. Explanatory. Insert the following statement on page ~9-7, pre- ceding "Flammable (Explosive) Limits and Range": Control of Spillal~e and Water Pollution. Spilled chemicals and flammable liquids should not be flushed down the drain or gutter or ditch without considering the consequences. Fire fighting and some other emergency operations may require such action but flushing spilled chemicals can contaminate water supplies, cause injury, and damage property. Emphasis should be on prevention of spills and on pre-emer- gency planning for control of spills of materials and for control of fire fighting water contaminated with chemicals. 2. Explanatory. Add the following note to the second paragraph under "Flash Point": NOTE: There are several types of apparatus for determining flash point by test. The Tag Closed ~Iester (ASTM D56) is intended for testing liquids having a viscosity less than 45 SUS at 100 ° F. and a flash point below 200 ° F. The Pensky-Martens Closed Tester (ASTM D93) is con- sidered accurate for testing liquids having a viscosity of 45 SUS or more at 100 ° F. or a flash point of 200 ° F. or higher. The Cleveland Open Tester (ASTM D92) is sometimes used for high flash point liquids. The Tag Open Tester (ASTM D1310) is frequently used for low-flash liquids where it is desired to have tests more representative of conditions in open tanks of flammable liquids, or for labeling and transportation pur- poses. For most liquids, the numerical value in degrees Fahrenheit of the closed cup flash point is some 10 to 20 percent lower than that of the open cup flash point for the same liquid, but there are some cases where the difference is greater or smaller. Standard specifications for the open cup and other testem are published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, PA 19103. 3. Explanatory. Revise the first sentence under "Hazard Identi- fication System" to read: "The diamond-shaped diagram shown for each chemical gives at a glance a general idea of the inherent hazards of the chemical and the order of severity of these h~z- ards under emergency conditions such as spills, leaks and fires." 452 49-2 COMMITTEE ON CHEMICALS AND EXPLOSIVES In the same paragraph insert the foUowing sentence between the first and second sentences: "The Hazard [dentificatio[~ System is not intended to identify the nonemergency health hazards of chemicals." 4. Explanatory. Revise the first sentence of the second paragraph under "Oxidizing Materials" to read: Because most inorganic oxidizing materials, such as sodium nitrate and potassium chlorate, do not themselves burn, their flammability hazard is zero in the diamond-shaped hazard identification symbol. 5. Aluminum (Dust or Powder). Insert between the second and third sentences in "Fire and Explosion Hazards": "Bulk dust when damp may heat spontaneously." 6. Ammonium Chloride. Add to "Fire and Explosion Hazards": "Ammonium chloride and silver salts may form a sensitive fulminating silver compound (possibly silver nitride)." Add to "Storage": "Separate from silver salts." 7. Ammonium Dichromate. In "Hazard Identification Symbol" increase Flammability Rating from 0 to I. Revise the first sentence of "Fire and Explosion Hazards" to read: "Oxidizing material, combustible solid." 8. Ammonium Nitrate. Reduce Flammability Rating from 1 to O. 9. Ammonium Perehlorale. Reduce Flammability Rating from 1 to 0 in nonfire and fire diamonds. 10. BeryUium. In "Hazard Identification Symbol" reduce Re- activity Rating from 1 to O. 11. Bronze. Delete all data on bronze. 12. Carbon Disulfide. In "Fire and Explosion Hazards" change ignition temperature to "194°F (90° C). '' 13. Dimethyl Sulfide. In "H~zard Identification Symbol" re- duce Health Rating from 4 to 2. Revise "Life Hazard" to read: "Moderate eye irritant. In a fire, highly irritating sulfur dioxide will be one of the combustion products." Revise "Personal Protection" to read: "Wear self-contained breathing apparatus." 453 REVISIONS TO NFPA NO. 49 49-3 14. Lead Arsenates. Delete "Will extil~guish fire" from "Fire and Explosion Hazards." 15. Lithium Hydride. In "Hazard Identification Symbol" in- crease Health Rating from 1 to 3. Add "l?ersonal Protection" to read: "PERSONAL PROTECTION: Wear full protective clothing." 16. Methyl Bromide. Delete