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Fire Resistance Test Method for Conveyor Belts.

Sapko MJ; Mura KE; Furno AL; Kuchta JM
MISSING :27 pages
A moderately scaled apparatus was developed by the Bureau of Mines to determine the fire resistance characteristics of mine conveyor belts and similar type materials. The design of the apparatus was based upon data obtained in full-scale fire tests and features a radiant panel to preheat the belt and a methane-oxygen ribbon burner to ignite the sample under ventilating conditions in a rectangular duct. The test method overcomes the limitations of existing laboratory-scale methods and provides a measure of both ignitability and flammability in quantitative terms. Flame propagation depended upon such variables as air velocity, ignitor heat flux, and belt width and height in the test chamber. Data are presented for nine belt materials and fire resistance ratings are proposed in terms of the flame spread rate, heat release rate, and the critical ignitor heat flux. The ratings discriminate between the fire hazard posed by diffeent fire-resistant belts and tend to be in reasonable agreement with those obtained in full-scale fire tests.
Publication Date
Document Type
IH; Report of Investigations
Fiscal Year
Identifying No.
RI 8521
NIOSH Division
Source Name
Page last reviewed: October 29, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division