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GB28374-2025
Fireproof coating for electric cable
电缆防火涂料
GB 28374-2025 — действующий обязательный национальный стандарт Китая: Fireproof coating for electric cable. Отрасль: Химия. Тема: Безопасность продукции. Дата вступления в силу: 1 июн. 2026 г..
Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.
Обзор требований
Этот обзор пока доступен только на английском языке.
Область применения
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.
Технические требования
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.
Методы испытаний
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.
Частые вопросы
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.
Подсказки по применимости
- Тип
- Безопасность
- CCS
- C84
- ICS
- 13.220.50
- Компетентное ведомство
- National Fire and Rescue Administration
- Технический комитет
- National Technical Committee on Fire Protection of Standardization Administration of China
Связи
Заменяет:GB 28374-2012