NFPA 270-2018 PDF Download

The NFPA 270-2018 standard is a crucial resource for fire test labs and manufacturers. It provides a consistent and reliable means of assessing the level of smoke obscuration caused by flat materials, products, or assemblies (including surface finishes) up to 25mm thick when exposed to specified levels of thermal irradiance in a closed chamber.

This test method is based on ISO 5659-2 and delivers equivalent results to that standard. The primary fire-test-response characteristic obtained from using NFPA 270 is the specific optical density of smoke emitted by the tested specimens. Additionally, a secondary characteristic called the mass optical density, which is the specific optical density of smoke divided by the mass lost by the specimens during the test, can also be measured optionally.

The 2018 edition of NFPA 270 introduces updates to the pressure sensor requirements in order to incorporate advancements in technology. The standard also includes references to other codes and standards, ensuring its alignment with other industry guidelines.