GB28374-2025
Fireproof coating for electric cable
电缆防火涂料
GB 28374-2025 is a current mandatory Chinese national standard for Fireproof coating for electric cable. It appears in the Chemicals compliance cluster with a product safety focus and has an implementation date of Jun 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
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.
Technical requirements
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.
Testing methods
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.
FAQs
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.
Applicability hints
- Type
- Safety
- CCS
- C84
- ICS
- 13.220.50
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China
Relationships
Replaces:GB 28374-2012