Seven recommended national standards for combustion performance test methods of building materials, approved and issued by the State Administration for Market Regulation (Standardization Administration), have completed a six-month implementation transition period and will officially take effect on October 1, 2026.
These standards are built around the core classification indicators of GB 8624-2025 "Classification for Burning Behavior of Building Materials and Products," covering multiple key test dimensions and forming a complete test and evaluation system for building fire protection materials.
The seven standards each have their own focus while complementing and connecting with one another, covering core test scenarios such as non-combustibility, combustibility, flame-retardant properties, single burning item tests, floor coverings, calorific value of combustion, and mass loss determination.
Among them, the "Test Method for Non-Combustibility of Building Materials" optimizes the test apparatus and temperature control, and clarifies judgment indicators under high-temperature conditions of 750 degrees Celsius from three dimensions: temperature rise, mass loss, and flaming combustion, providing key test evidence for the recognition of Class A non-combustible materials.
The "Test Method for Combustibility of Building Materials" refines requirements related to ignition methods and flame spread determination, improves the test process for surface combustibility of materials under normal temperature and ambient conditions, and enhances the ability to assess early-stage fire risks.
The "Test Method for Flame-Retardant Properties of Building Materials" upgrades the vertical furnace test apparatus and judgment criteria, adds a calorimetric device on the basis of the original fire spread test, optimizes the heat release measurement model, and improves the scientific nature of test evaluation for flame-retardant materials.
The remaining four standards are respectively the single burning item test, determination of combustion performance of floor coverings, determination of calorific value of combustion, and determination of mass loss in combustion performance tests. They target subdivided scenarios such as corner fire simulation, evaluation of floor building materials, calorific value accounting, and combustion mass loss detection, optimizing calibration procedures, test parameters, and calculation methods to meet the testing and evaluation needs of different categories of building materials and products.
After these standards are officially implemented, they will work in coordination with the GB 8624-2025 classification standard, further improving the applicability, accuracy, and operability of combustion performance classification for building materials, and providing a unified standard basis for engineering design material selection, product research and development testing, certification evaluation, and supervision and enforcement.