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

More documents

Recommendations

Info

“Confined” combustible dust operations can be designed to minimize damage potential or prevent explosions. NFPA 69, Standard on Explosion Prevention Systems (1997), and NFPA 68, Guide for Venting Deflagrations (2002), describe explosion venting as a means of mitigating or preventing a dust explosion. NFPA 68 states: “[B]y releasing expanding gases through an opening engineered for the purpose, it is possible to maintain a reduced maximum pressure that is below that which would cause unacceptable damage.” CSB investigators did not observe any explosion venting design or explosion prevention systems incorporated into the CTA production process or any of the facility structures. 120
APPENDIX E: HMIS Rating System The National Paint and Coatings Association developed the Hazardous Materials Identification System (HMIS) in the early 1970s for use as an in-plant labeling system. The hazard rating system is conveyed in a rectangular-shaped box divided into four areas, each assigned a color and a numerical rating: • Health hazard (blue) • Flammability hazard (red) • Reactivity hazard (yellow) • Protective equipment (white). The order of severity of each hazard is indicated by a numerical grading from “4,” indicating severe hazard or extreme danger, to “0,” indicating minimal hazard. HMIS uses a letter code (A to K) to recommend appropriate personal protective equipment to be worn when handling specific chemicals. For the CTA investigation, the rating of interest is the flammability rating (Table E-1) assigned by Borden Chemical to its phenolic resins. The flammability rating of a material is based on ease of ignition. 121
Page 1 and 2:
KEY ISSUES: U.S. CHEMICAL S AFETY A
Page 3 and 4:
5.1.2 Line 405 Oven Temperature Con
Page 5 and 6:
9.1 FM Global Guidelines...........
Page 7 and 8:
Figures 1 Simplified Layout of CTA
Page 9 and 10:
ACC American Chemistry Council Acro
Page 11 and 12:
Executive Summary A February 20, 20
Page 13 and 14:
1.0 Introduction At approximately 7
Page 15 and 16:
2.0 Key Findings 1. Combustible phe
Page 17 and 18:
3.0 Facility Description 3.1 CTA Ac
Page 19 and 20:
eams. Nonload-bearing masonry block
Page 21 and 22:
Thirteen-foot-high freestanding enc
Page 23 and 24:
4.0 Process Description The product
Page 25 and 26:
4.1.2 Mat-former and Baghouse In th
Page 27 and 28:
Circulating fans and dampers direct
Page 29 and 30:
• Manually striking baghouse bags
Page 31 and 32:
5.0 Incident Description 5.1 Pre-In
Page 33 and 34:
• The line was one week past due
Page 35 and 36:
forklift with a semi-enclosed cab d
Page 37 and 38:
panels and lights down inside the b
Page 39 and 40:
occurred in the southeast corner of
Page 41 and 42:
5.3.3 Firefighting Activities 5.3.3
Page 43 and 44:
5.4 Incident Aftermath The CTA inci
Page 45 and 46:
6.0 Understanding Combustible Dust
Page 47 and 48:
As depicted in Figure 11 (Eckhoff,
Page 49 and 50:
Figure 12. Mechanism for a dust fir
Page 51 and 52:
7.0 Reconstructive Analysis To dete
Page 53 and 54:
urned clean but otherwise intact an
Page 55 and 56:
7.1.2 Other Possible Initiating Eve
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
Page 63 and 64:
that the phenolic resin could explo
Page 65 and 66:
A 1998 internal Borden Chemical mem
Page 67 and 68:
• Characterize new and existing p
Page 69 and 70: CTA that phenolic resins, when susp
Page 71 and 72: CTA department supervisors were res
Page 73 and 74: 8.5 Work Practices 8.5.1 Production
Page 75 and 76: operating the oven with the doors o
Page 77 and 78: 8.7 Incident Investigations The inc
Page 79 and 80: • Excessive accumulations of comb
Page 81 and 82: Data Sheet 6-9 also states: Clean o
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 and 104: APPENDIX B: Laboratory Testing of P
Page 105 and 106: B.2 Minimum Explosible Concentratio
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
Page 113 and 114: II controllers, only manufactured a
Page 115 and 116: Therefore, at any given time, it wa
Page 117 and 118: APPENDIX D: NFPA Guidelines In prom
Page 119: D.2 Other Pertinent NFPA Codes D.2.
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
show all

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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?