NFPA 253:2023

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. Chapter 6 Radiant Heat Energy Flux Profile Standardization 6.1 Procedure. 2.1 General. 2.2 NFPA Publications. (Reserved) 2.3 Other Publications. 2.4 References for Extracts in Mandatory Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 Test Apparatus 4.1 Radiant Panel Test Apparatus. 4.2 Test Chamber. 4.3 Radiant Heat Energy Source. 4.4 Specimen Holder. 4.5 Pilot Burner. 4.6 Thermocouples. 4.7 Exhaust Hood. 4.8 Dummy Specimen. 4.9 Timer. Chapter 5 Test Specimens 5.1 Sampling Procedure. 5.2 Specimen Size and Mounting. 5.3 Specimen Conditioning. Chapter 6 Radiant Heat Energy Flux Profile Standardization 6.1 Procedure. 6.2 Calibration of Radiation Instrumentation. Chapter 7 Test Procedure 7.1 Pretest Heating. 7.4 Flame Propagation of Specimen. 7.5 Completion of Test. 7.6 Data Collection and Recording. 7.7 Removal of Specimen. 7.8 Subsequent Testing. 7.9 Extent of Flame Travel After a Prescribed Period. Chapter 8 Calculations 8.1 General. 8.2 Formulas. Chapter 9 Report 9.1 Required Information. Annex A Explanatory Material Annex B Sample Data Logs Annex C Commentary on Critical Radiant Flux Test Annex D Precision and Bias Annex E Safety Precautions Annex F Informational References

This fire test response standard describes a procedure for measuring critical radiant flux behavior of horizontally mounted floor covering systems exposed to a flaming ignition source in a graded, radiant heat energy environment within a test chamber.