Report of Investigations 8464: Practical Ignition Problems Related to Intrinsic Safety in Mine Equipment: Four Short-Term Studies

Details

• Personal Author:
  Burgess, David S. ; Kubala, Theodore A. ; Litchfield, Elton L. ; Perzak, Frank J. ; Schellinger, T. ; Burgess, David S. ; Kubala, Theodore A. ; Litchfield, Elton L. ; Perzak, Frank J. ; Schellinger, T.
• Corporate Authors:
  United States. Bureau of Mines ; United States. Bureau of Mines
• Description:
  Four short-term studies of practical ignition problems were undertaken and completed during the course of the Bureau of Mines project "development of specifications for intrinsically safe equipment." Conclusions were as follows: (1) the most easily ignitible mixture of propane-air in a ptb break flash apparatus is approximately 5.2 percent propane; (2) miniature lamp bulbs to be used in intrinsically safe circuits are about as incendive to coal dust-air as to methane-air and should be tested in gas mixtures containing about 7.0 to 7.5 percent methane; (3) the sodium amalgam contained in high-pressure sodium lamps does not present an ignition hazard for coal dust or methane, where the lamps contain no more than 30 milligrams of amalgam; (4) the maximum allowable surface temperature of permissible electrical enclosures should remain at 150 deg. C despite efforts by industry groups to raise the value to 200 deg. C. [Description provided by NIOSH]
• Subjects:
  Coal Fires Mining Occupational Health Safety
• Series:
  Mining Publications   ; Mining Publications  
• Subseries:
  Report of Investigations ; Report of Investigations
• ISSN:
  1066-5552 (print)
• Publisher:
  United States. Bureau of Mines
• Document Type:
  Text
• Genre:
  Case Report ; Case Report
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• Rights:
  Public Domain
• CIO:
  National Institute for Occupational Safety and Health (NIOSH) ; National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRC - Pittsburgh Research Center ; PRC - Pittsburgh Research Center
• Topic:
  Workplace Safety & Health ; Workplace Safety & Health
• Location:
  North America ; North America
• Pages in Document:
  26 pdf pages
• NIOSHTIC Number:
  nn:10000395
• Citation:
  NTIS: PB 81/1147282; :1-18
• Federal Fiscal Year:
  1980
• Peer Reviewed:
  False
• Source Full Name:
  NTIS: PB 81/1147282
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5f74781c7cadb6d62d301b0123a89250b43c22359809b614fd2c8adc38bb40d8a97dfc7c208b1b1831329d9e2cf32b6725dd0366f9b33ea62bc1b36151e6c0bc
• Download URL:
  https://stacks.cdc.gov/view/cdc/201696/cdc_201696_DS1.pdf
• File Type:
  [PDF - 979.39 KB ]