CTA Report, Draft 1, ISP Review - US Chemical Safety and Hazard ...

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Figures B-1 and B-2 show test overpressures and rates of pressure rise as a function of concentration, respectively. The highest values of each over the entire concentration range determined Pmax and (dP/dt)max. For comparison, Figure 14 (Section 7.2) shows explosion severity data for polyethylene, Pittsburgh coal dust, and cornstarch. Rate of Pressure Rise [psig/sec] Explosion Pressure [psig] 140 120 100 80 60 40 20 0 0 200 400 600 800 1000 1200 1400 Concentration [g/m³] Figure B-1. Durite SD-52SS overpressure versus concentration. 10000 9000 8000 7000 6000 5000 4000 3000 2000 1000 0 0 200 400 600 800 1000 1200 1400 Concentration [g/m³] Figure B-2. Durite SD-52SS rate of pressure rise versus concentration. 104
B.2 Minimum Explosible Concentration Minimum explosible concentration (MEC) is the minimum concentration of a combustible dust cloud that is capable of propagating a deflagration through a uniform mixture of dust and air under specified conditions. MEC data provide a relative measure of the minimum concentration of a dust cloud necessary for an explosion. The values obtained are specific to the sample (particularly particle size distribution) and test method. MEC values are not to be considered intrinsic material constants. The test was performed per ASTM E1515-00, Standard Test Method for Minimum Explosible Concentration of Combustible Dusts (2000b), using the U.S. Bureau of Mines 20-liter explosibility chamber. Figure B-3 compares MECs for the Borden Chemical SD-52SS phenolic resin, Pittsburgh coal dust, polyethylene dust, and cornstarch. MEC (g/m³) 70 60 50 40 30 20 10 0 28 50 60 60 Cornstarch Pittsburgh Pulverized Coal Dust SD-52SS + Carbon Black #2 Polyethylene Figure B-3. Minimum explosive concentration of Durite SD-52SS compared with other common combustible dusts. 105
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KEY ISSUES: U.S. CHEMICAL S AFETY A
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5.1.2 Line 405 Oven Temperature Con
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9.1 FM Global Guidelines...........
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Figures 1 Simplified Layout of CTA
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ACC American Chemistry Council Acro
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Executive Summary A February 20, 20
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1.0 Introduction At approximately 7
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2.0 Key Findings 1. Combustible phe
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3.0 Facility Description 3.1 CTA Ac
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eams. Nonload-bearing masonry block
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Thirteen-foot-high freestanding enc
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4.0 Process Description The product
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4.1.2 Mat-former and Baghouse In th
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Circulating fans and dampers direct
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• Manually striking baghouse bags
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5.0 Incident Description 5.1 Pre-In
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• The line was one week past due
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forklift with a semi-enclosed cab d
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panels and lights down inside the b
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occurred in the southeast corner of
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5.3.3 Firefighting Activities 5.3.3
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5.4 Incident Aftermath The CTA inci
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6.0 Understanding Combustible Dust
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As depicted in Figure 11 (Eckhoff,
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Figure 12. Mechanism for a dust fir
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7.0 Reconstructive Analysis To dete
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Page 57 and 58: Table 3 Borden Chemical Black Pheno
Page 59 and 60: 7.3 Line 405 Equipment Testing CSB
Page 61 and 62: determine if those products are haz
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Page 65 and 66: A 1998 internal Borden Chemical mem
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Page 69 and 70: CTA that phenolic resins, when susp
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Page 73 and 74: 8.5 Work Practices 8.5.1 Production
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Page 77 and 78: 8.7 Incident Investigations The inc
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Page 83 and 84: Table 5 Insurance Company Dust Issu
Page 85 and 86: standards (Appendix D). Kentucky OS
Page 87 and 88: 10.2.2 Division of Building Codes E
Page 89 and 90: 11.0 Combustible Dust Hazard Study
Page 91 and 92: 4. The Borden Chemical product stew
Page 93 and 94: 13.0 Recommendations CSB developed
Page 95 and 96: Kentucky Office of Occupational Saf
Page 97 and 98: BY THE U.S. Chemical Safety and Haz
Page 99 and 100: Lawson, Robert G., 1984. Beverly Hi
Page 101 and 102: APPENDIX A: Fire and Explosion Dama
Page 103: APPENDIX B: Laboratory Testing of P
Page 107 and 108: B.4 Propagating Brush Discharge Ign
Page 109 and 110: Material Corona Charge Voltage (kV)
Page 111 and 112: APPENDIX C: Equipment Testing Line
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Page 115 and 116: Therefore, at any given time, it wa
Page 117 and 118: APPENDIX D: NFPA Guidelines In prom
Page 119 and 120: D.2 Other Pertinent NFPA Codes D.2.
Page 121 and 122: APPENDIX E: HMIS Rating System The
Page 123 and 124: APPENDIX F: Simplified Organization
Page 125 and 126: Subtree A Second dust explosion abo
Page 127: Subtree C Most CTA personnel had a
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