BSS 7238, a Boeing Safety Standard, defines a test method for determining the specific optical density of smoke emanating from solid materials by the NBS chamber. The design of this standard was based on the ASTM E662 standard published by the American Society for Testing and Materials (ASTM) (ASTM E662-21ae1 Standard test method for the specific optical density of smoke produced by solid materials).
This fire test response standard covers the determination of the specific optical density of smoke produced by vertically mounted solid materials and assemblies in thicknesses up to 25,4 mm. In this test method, the attenuation of a light beam by smoke (suspended solid or liquid particles) accumulated in a closed chamber due to flameless pyrolytic decomposition and flaming combustion is detected. Results are expressed in terms of specific optical density derived from a geometric factor and measured optical density, which is a measurement property of smoke concentration.
The BSS 7238 standard focuses mainly on determining the fire response of materials used in Boeing type aircraft. During the tests, the samples are dried at 24 degrees Celsius within 60 hours and conditioned at 23 degrees Celsius and 50 percent humidity. The following values are measured in the tests:
The smoke density chamber test method (NBS chamber) was developed by the National Institute of Standards and Technology (NIST). This test room is used in many areas of testing. This test method is mainly used to detect plastic products and non-metallic travel materials, dense non-metallic equipment, wire ropes and similar materials.
A published standard on this subject is the ISO 5659-2 standard (Plastics - Smoke generation - Part 2: Determination of optical density by single chamber test). This standard describes a test method for measuring smoke production from the exposed surface of material or composite samples.
Among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors, our organization also provides smoke density testing services in case of combustion of Boeing aircraft material, within the scope of BSS 7239 standard, with its trained and expert staff and advanced technological equipment.
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
EUROLAB reporting and certification activities, United Accreditation Foundation (UAF), Turkish Accreditation Agency (TÜRKAK), Enterprise Accreditation Foundation (EAF) based on the accreditation provided by its institution. The Enterprise Accreditation Foundation (EAF) is also a signatory to the United Nations (UN GLOBAL COMPACT).
