This engineering guide provides methods for predicting piloted ignition of solid materials from thermal radiation. It is intended to be used in conjunction with the Engineering Guide: Assessing Flame Radiation to External Targets from Pool Fires or other methods capable of predicting thermal radiation. The guide reviews the concept of minimum ignition level and reviews five methods to calculate the time to ignition under constant radiative heat flux. This guide includes sample results for each method and an appendix of relevant material properties.
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