NFPA® 253 Standard Method of Test for Critical Radiant Flux of Floor Covering Systems Using a Radiant Heat Energy Source 2011 Edition

Chapter 1 Administration

1.1 Scope
1.2 Purpose
1.3 Application
1.4 Summary of Test Method

Chapter 2 Referenced Publications

2.1 General
2.2 NFPA Publications. (Reserved)
2.3 Other Publications
2.4 References for Extracts in Mandatory Sections. (Reserved)

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

Chapter 7 Test Procedure

7.1 Pretest Heating
7.2 Sample Mounting
7.3 Ignition of Pilot Burner
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 Procedure for Calibration of Apparatus
Annex C Sample Data Logs
Annex D Commentary on Critical Radiant Flux Test
Annex E Precision and Bias
Annex F Safety Precautions
Annex G Informational References
Index