NFPA 270 2018
$80.71
NFPA 270: Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber
Published By | Publication Date | Number of Pages |
NFPA | 2018 | 40 |
This test method provides a means of measuring smoke obscuration of essentially flat materials, products, or assemblies (including surface finishes) up to 25mm thick, when exposed to specified levels of thermal irradiance in a single closed chamber.
PDF Catalog
PDF Pages | PDF Title |
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2 | Important Notices and Disclaimers |
3 | Additional Notices and Disclaimers |
7 | Chapter 1 Administration 1.1 Scope. 1.2 Purpose. (Reserved) 1.3 Application. |
8 | 1.4 Units and Formulas. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. (Reserved) 2.3 Other Publications. |
9 | 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 General. 4.2 Test Chamber. |
11 | 4.3 Sample Support and Heating Arrangements. |
12 | 4.4 Gas Supply. |
13 | 4.5 Photometric System. |
14 | 4.6 Chamber Leakage. 4.7 Cleaning Materials. 4.8 Ancillary Equipment. Chapter 5 Test Environment 5.1 Light Interference. 5.2 Product of Combustion Venting. 5.3 Operator Safety. |
15 | Chapter 6 Test Specimen 6.1 Suitability of Sample for Testing. 6.2 Sample Face. 6.3 Number of Specimens. 6.4 Additional Specimens. 6.5 Size of Specimens. 6.6 Specimen Preparation. 6.7 Wrapping of Specimens. Chapter 7 Setup, Calibration, and Maintenance 7.1 Setup and Calibration Procedures. |
16 | 7.2 Alignment of Photometric System. 7.3 Selection of Compensating Filter(s). 7.4 Linearity Check. 7.5 Calibration of Range-Extension Filter. 7.6 Chamber Leakage Rate Test. |
17 | 7.7 Burner Calibration. 7.8 Radiator Cone Calibration. 7.9 Cleaning. 7.10 Frequency of Checking and Calibrating Procedures. 7.11 Total System. |
18 | Chapter 8 Conditioning 8.1 Pre-Test. 8.2 Conditioning. Chapter 9 Test Procedure 9.1 Initial Conditions. 9.2 Tests with Pilot Flame. |
19 | 9.3 Preparation of Photometric System. 9.4 Loading Specimen. 9.5 Recording of Light Transmission. 9.6 Observations. 9.7 Termination of Test. 9.8 Specimen Mass. 9.9 Repeat Tests. |
20 | Chapter 10 Calculations 10.1 Specific Optical Density, Ds. 10.2 Clear Beam Correction Factor, Dc. 10.3 Mass Loss. Chapter 11 Test Report 11.1 Descriptive Information. 11.2 Test Results. |
21 | Annex A Explanatory Material |
23 | Annex B Precision and Bias |
26 | Annex C Interlaboratory Application |
27 | Annex D Determination of Mass Optical Density |
32 | Annex E Informational References |