ISO 5659-2:2017 PDF

Plastics — Smoke generation — Part 2: Determination of optical density by a single-chamber test

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Title (English):

ISO 5659-2:2017

Plastics — Smoke generation — Part 2: Determination of optical density by a single-chamber test

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 49
Publication date:: May 23, 2017
Edition:: ISO IS 5659 edition 4 version 1
ICS:: 13.220.40

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Description (English):

ISO 5659-2:2017 specifies a method of measuring smoke production from the exposed surface of specimens of materials or composites. It is applicable to specimens that have an essentially flat surface and do not exceed 25 mm in thickness when placed in a horizontal orientation and subjected to specified levels of thermal irradiance in a closed cabinet with or without the application of a pilot flame. This method of test is applicable to all plastics. It is intended that the values of optical density determined by this test be taken as specific to the specimen or assembly material in the form and thickness tested and are not to be considered inherent, fundamental properties. The test is intended primarily for use in research and development and fire safety engineering in buildings, trains, ships, etc. and not as a basis for ratings for building codes or other purposes. No basis is provided for predicting the density of smoke that can be generated by the materials upon exposure to heat and flame under other (actual) exposure conditions. This test procedure excludes the effect of irritants on the eye.

Technical details

Technical committee: ISO/TC 61/SC 4 - Burning behaviour
SKU: ISO 5659-2:2017

Abstract

Overview

ISO 5659-2:2017 - Plastics - Smoke generation - Part 2: Determination of optical density by a single-chamber test specifies a laboratory method to measure smoke production (optical density) from the exposed surface of plastic specimens using a single‑chamber test. The method is applicable to essentially flat specimens up to 25 mm thickness placed horizontally and exposed to defined thermal irradiance in a closed cabinet, with or without a pilot flame. Results are specific to the sample form and thickness tested and intended for research, development and fire‑safety engineering - not as a direct basis for building code ratings or to predict real‑world fire smoke levels.

Key technical topics and requirements

Specimen requirements
- Flat geometry, maximum thickness 25 mm, preparation and conditioning procedures.
- Number, size and orientation of specimens defined to ensure repeatability.
Test chamber and apparatus
- Closed single‑chamber (closed cabinet) photometric test cabinet.
- Radiator cone and heat flux control to deliver specified thermal irradiance.
- Optional pilot burner for flaming or non‑flaming exposures.
Photometric system
- Light source, photodetector alignment, beam collimation and focusing, compensating and range‑extension filters.
- Recording of light transmission to calculate specific optical density (Ds).
Calibration and quality checks
- Chamber leakage test, burner and radiator calibration, linearity checks and compensating filter selection.
- Frequency of calibration and cleaning procedures described.
Data and reporting
- Expression of results as specific optical density with clear‑beam correction.
- Precision data, test report content and informative annexes (calibration, variability, mass optical density, guidance on testing and sample preparation).

Practical applications and users

Who uses ISO 5659-2:2017:

Fire safety engineers and researchers conducting smoke generation studies.
Materials scientists and plastics R&D teams developing low‑smoke formulations.
Independent test laboratories performing comparative smoke measurements.
Designers and safety assessors for buildings, rail, marine interiors interested in material behaviour under thermal exposure.

Typical applications:

Comparing smoke production of different plastic formulations or surface finishes.
Supporting product development and fire‑performance optimization.
Integrating smoke data into fire models and safety engineering studies.

Note: The standard excludes assessment of eye‑irritant effects and does not provide a basis for predicting smoke density under different or real‑world fire scenarios.

Related standards

Other parts of the ISO 5659 series (smoke generation test family).
Harmonized sample preparation with ISO 5660‑1 (heat release rate tests).

Related standards

Mentioned in the description and other ISO standards

Abstract

Overview

Key technical topics and requirements

Specimen requirements
- Flat geometry, maximum thickness 25 mm, preparation and conditioning procedures.
- Number, size and orientation of specimens defined to ensure repeatability.
Test chamber and apparatus
- Closed single‑chamber (closed cabinet) photometric test cabinet.
- Radiator cone and heat flux control to deliver specified thermal irradiance.
- Optional pilot burner for flaming or non‑flaming exposures.
Photometric system
- Light source, photodetector alignment, beam collimation and focusing, compensating and range‑extension filters.
- Recording of light transmission to calculate specific optical density (Ds).
Calibration and quality checks
- Chamber leakage test, burner and radiator calibration, linearity checks and compensating filter selection.
- Frequency of calibration and cleaning procedures described.
Data and reporting
- Expression of results as specific optical density with clear‑beam correction.
- Precision data, test report content and informative annexes (calibration, variability, mass optical density, guidance on testing and sample preparation).

Practical applications and users

Who uses ISO 5659-2:2017:

Fire safety engineers and researchers conducting smoke generation studies.
Materials scientists and plastics R&D teams developing low‑smoke formulations.
Independent test laboratories performing comparative smoke measurements.
Designers and safety assessors for buildings, rail, marine interiors interested in material behaviour under thermal exposure.

Typical applications:

Comparing smoke production of different plastic formulations or surface finishes.
Supporting product development and fire‑performance optimization.
Integrating smoke data into fire models and safety engineering studies.

Note: The standard excludes assessment of eye‑irritant effects and does not provide a basis for predicting smoke density under different or real‑world fire scenarios.

Related standards

Other parts of the ISO 5659 series (smoke generation test family).
Harmonized sample preparation with ISO 5660‑1 (heat release rate tests).

ISO 5659-2:2017 PDF

Technical details

Abstract

Overview

Key technical topics and requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key technical topics and requirements

Practical applications and users

Related standards

Related standards

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