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Influence of electrode material on spark ignition probability.

Authors
Peterson-JS
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9416, 1992 Jan; :1-19
NIOSHTIC No.
10011241
Abstract
The testing procedures of the U.S. Mine Safety and Health Administration specify that intrinsic safety acceptance tests be conducted using a standard tungsten-cadmium electrode configuration in the breakflash apparatus. However, in realistic mining environments, other materials may be more likely sources of sparking. Information defining the probability of spark ignition between common materials such as aluminum, brass, copper, lead, tin, cold-rolled steel, and stainless steel is of more practical value in determining ignition hazards. The U.S. Bureau of Mines has completed an investigation of the influence of material on the ignition probability using the breakflash apparatus. By comparing ignition currents or ignition voltages corresponding to a probability of one ignition per thousand sparks to those found previously for cadmium, a margin of safety may be estimated for each material. This report presents the results of an investigation into the influence of disk electrode material on the probability of ignition.
Keywords
Mining-industry; Mining-equipment; Safety-engineering; Safety-research; Explosive-hazards; Explosive-devices; Explosion-prevention
Contact
Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh, PA 15236
CAS No.
7440-50-8; 7439-92-1; 7440-31-5; 7440-43-9
Publication Date
19920101
Document Type
IH; Report of Investigations
Fiscal Year
1992
NTIS Accession No.
PB92-206929
NTIS Price
A03
Identifying No.
RI-9416
NIOSH Division
PRL
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9416
State
PA
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