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NFPA 270 2013

NFPA 270 2013

$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 2013 37
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Evaluate the extent of smoke obscuration with the up-to-date testing criteria in the 2013 NFPA 270. NFPA 270: Standard Test Method for Measurement of Smoke Obscuration Using a Conical Radiant Source in a Single Closed Chamber provides fire test labs and manufacturers with 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. This test method is based on ISO 5659-2, Determination of Specific Optical Density by a Single-Chamber Test, and provides equivalent results to ISO 5659-2. The principal fire-test-response characteristic obtained from using NFPA 270 is the specific optical density of smoke from the specimens tested. An optional fire-test-response characteristic measurable with this method is the mass optical density, which is the specific optical density of smoke divided by the mass lost by the specimens during the test. The 2013 NFPA 270 includes updated code and standard references as well as editorial revisions that improve usability and consistency with other standards.

PDF Catalog

PDF Pages PDF Title
2 Important Notices and Disclaimers
3 Additional Notices and Disclaimers
4 2.1 General
2.2 NFPA Publications (Reserved)
7 Chapter 1 Administration
1.1 Scope
1.2 Purpose (Reserved)
1.3 Application
8 1.4 Units and Formulas
Chapter 2 Referenced Publications
2.3 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
9 Chapter 4 Test Apparatus
4.1 General
4.2 Test Chamber
10 4.3 Sample Support and Heating Arrangements
12 4.4 Gas Supply
4.5 Photometric System
13 4.6 Chamber Leakage
4.7 Cleaning Materials
4.8 Ancillary Equipment
14 Chapter 5 Test Environment
5.1 Light Interference
5.2 Product of Combustion Venting
5.3 Operator Safety
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
15 6.7 Wrapping of Specimens
Chapter 7 Setup, Calibration, and Maintenance
7.1 Setup and Calibration Procedures
7.2 Alignment of Photometric System
7.3 Selection of Compensating Filter(s)
7.4 Linearity Check
16 7.5 Calibration of Range-Extension Filter
7.6 Chamber Leakage Rate Test
7.7 Burner Calibration
7.8 Radiator Cone Calibration
17 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
9.3 Preparation of Photometric System
9.4 Loading Specimen
9.5 Recording of Light Transmission
9.6 Observations
9.7 Termination of Test
19 9.8 Specimen Mass
9.9 Repeat Tests
Chapter 10 Calculations
10.1 Specific Optical Density, Ds
10.2 Clear Beam Correction Factor, Dc
10.3 Mass Loss
20 Chapter 11 Test Report
11.1 Descriptive Information
11.2 Test Results
Annex A Explanatory Material
22 Annex B Precision and Bias
25 Annex C Interlaboratory Application
Annex D Determination of Mass Optical Density
29 Annex E Informational References
31 Index

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NFPA 270 2013
$80.71