GB8624-2025

Classification for burning behavior of building materials and products

建筑材料及制品燃烧性能分级

GB 8624-2025 est une norme nationale chinoise obligatoire à venir : Classification for burning behavior of building materials and products. Secteur : Chimie. Thème principal : Sécurité des produits. Entrée en vigueur : 1 janv. 2027.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

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Champ d’application

This standard is mandatory for the classification of burning behavior for building materials and products, decorative materials, and non-metallic materials for equipment devices in China. It applies to flat materials, flooring, roof coverings, thermal insulation products, and photovoltaic modules. It does not apply to materials and products not intended for building or related applications. Other materials and products may refer to this standard for classification.

Exigences techniques

The standard classifies materials into four main grades: A (non-combustible), B1 (difficult to ignite), B2 (combustible), and B3 (easily combustible). For building materials, grades A2, B, and C must also include sub-grades for smoke production (s1, s2, s3), flaming droplets/particles (d0, d1, d2), and smoke toxicity (t0, t1, t2). Manufacturers must declare the full classification string, e.g., B1(B-s1,d0,t1), on product packaging. Specific requirements are defined for various product categories, including flat materials, flooring, and roof coverings. For thermal insulation products, the standard introduces new classifications and requires the determination of thermal conductivity alongside burning behavior. For photovoltaic modules, specific fire performance test methods are introduced to evaluate their protective capability for the substrate under different fire source intensities. Building insulation products must be marked with a QR code or electronic tag containing detailed product and compliance information.

Méthodes d’essai

The standard references multiple testing methods to determine the classification. Key tests include the single burning item test (GB/T 20284) for measuring heat release and smoke production, the non-combustibility test (GB/T 5464), and the gross heat of combustion determination (GB/T 14402). For flooring, the radiant panel test (GB/T 11785) is used. Specific tests like the oxygen index method (GB/T 2406.2) and electric weld spark method (GB/T 40237) are required for thermal insulation foams. For photovoltaic modules, the PV module fire performance test (GB/T 46980) is applied.

Questions fréquentes

What products are regulated under GB 8624-2025?

It regulates building materials and products, decorative materials (like curtains and furniture foams), and non-metallic materials for equipment devices, including wire cable sleeves and photovoltaic modules.

Are there any updates from the previous version of GB 8624?

Yes, the 2025 version replaces the 2012 version. Key updates include the addition of classifications and test methods for building thermal insulation products and photovoltaic modules, as well as new requirements for smoke toxicity and flaming droplets sub-grades.

How is the burning behavior classification expressed?

For building materials, it is expressed as a combination of the main grade and sub-grades, such as B1(B-s1,d0,t1), which indicates the main grade (B1), smoke production (s1), flaming droplets (d0), and smoke toxicity (t1).

The summary above provides a high-level overview of GB 8624-2025. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 8624-2025 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Sécurité
CCS: C 80
ICS: 13.220.50
Autorité compétente: National Fire and Rescue Administration
Comité technique: National Technical Committee on Fire Protection of Standardization Administration of China

Relations

Remplace:GB 8624-2012 (En vigueur)