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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
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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
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
NFPA 270 2018
$80.71