GB28374-2025

Fireproof coating for electric cable

电缆防火涂料

GB 28374-2025 est une norme nationale chinoise obligatoire en vigueur : Fireproof coating for electric cable. Secteur : Chimie. Thème principal : Sécurité des produits. Entrée en vigueur : 1 juin 2026.

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

Cet aperçu n’est actuellement disponible qu’en anglais.

Champ d’application

GB 28374-2025 applies to fireproof coatings for electric cables used in various application environments. It covers coatings applied to cables with insulation and sheaths made of rubber, polyethylene, PVC, or cross-linked polyethylene. This standard is mandatory for manufacturers producing cable fireproof coatings for the Chinese market. It does not apply to coatings for non-cable applications.

Exigences techniques

The standard specifies comprehensive technical requirements for cable fireproof coatings, categorized into water-based, solvent-based, and other types. Key requirements include in-container state, ensuring no agglomeration and uniformity after stirring. It also defines limits for fineness and viscosity, along with specific drying time parameters for surface dry and hard dry conditions. Additionally, the standard mandates durability tests such as oil resistance, salt spray corrosion resistance, and humidity resistance, ensuring the coating remains intact without cracking, peeling, or blistering under harsh conditions. Coatings must also meet strict smoke density and flame retardancy criteria to ensure safety. The standard references GB/T 17651.2 for smoke density and GB/T 18380.32-2022 for flame propagation tests.

Méthodes d’essai

Testing methods include evaluating the coating's state in a container, measuring fineness and viscosity, and determining drying times. Durability is assessed through oil immersion, salt spray exposure, and humidity tests. Bending resistance is tested by wrapping the cable around a cylinder. Smoke density is measured according to GB/T 17651.2, and flame retardancy is evaluated using the AF/R class test method specified in GB/T 18380.32-2022, measuring the charred height after combustion.

Questions fréquentes

What products are regulated under GB 28374-2025?

GB 28374-2025 regulates fireproof coatings for electric cables, including water-based, solvent-based, and other types of coatings applied to cables with rubber, PE, PVC, or XLPE insulation and sheaths.

Are there any updates from the previous version of GB 28374?

Yes, GB 28374-2025 replaces the 2012 version. Key updates include the addition of smoke density requirements and test methods, salt spray corrosion resistance tests, and modifications to oil resistance and freeze-thaw cycle requirements.

How does GB 28374-2025 address flame retardancy?

The standard evaluates flame retardancy by measuring the charred height of the cable base material after a 40-minute fire exposure, following the AF/R class test method in GB/T 18380.32-2022. The charred height must not exceed 2.50 meters.

The summary above provides a high-level overview of GB 28374-2025. 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 28374-2025 today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Sécurité
CCS: C84
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 28374-2012