GB14907-2018
Fire resistive coating for steel structure
钢结构防火涂料
GB 14907-2018 is a current mandatory Chinese national standard for Fire resistive coating for steel structure. It appears in the Chemicals compliance cluster with a product safety focus and has an implementation date of Jun 1, 2019.
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
This standard applies to all types of fire resistive coatings used on the surface of steel structures in buildings and civil engineering works. It covers classifications based on fire protection objects (ordinary vs. special), usage locations (indoor vs. outdoor), dispersion media (water-based vs. solvent-based), and fire protection mechanisms (intumescent vs. non-intumescent). It is strictly applicable to structural steel elements and does not cover fire protection materials for concrete or other non-steel substrates.
Technical requirements
The standard specifies mandatory technical requirements for both general and performance characteristics. General requirements dictate that raw materials must comply with national environmental and safety regulations, and coatings must be applicable via standard construction methods without emitting irritating odors once dried. Notably, the minimum dry coating thickness must not be less than 1.5 mm for intumescent coatings and 15 mm for non-intumescent coatings. Performance requirements are categorized for indoor and outdoor applications. For indoor coatings, the standard regulates physical and chemical properties such as bond strength, dry density, pH value, and resistance to water and cold-heat cycling. Outdoor coatings must meet more stringent durability requirements, including resistance to heat exposure, moisture, freeze-thaw cycles, acids, alkalis, salt spray corrosion, and UV radiation. The standard also defines strict fire resistance limits graded from 0.50 hours to 3.00 hours. Fire performance is differentiated between ordinary steel structure coatings (tested under building fiber fire conditions) and special steel structure coatings (tested under hydrocarbon (HC) fire conditions). Manufacturers must ensure that thermal insulation efficiency deviation remains within ±15% during factory testing.
Testing methods
Testing procedures include evaluating physical and chemical properties such as drying time, initial drying crack resistance, and bond strength using standardized tensile and compression machines. Durability is assessed through prolonged exposure tests (e.g., water immersion, salt spray chambers, UV irradiation) followed by measuring the thermal insulation efficiency decay. Fire resistance is tested using full-scale horizontal furnace tests on coated steel beams (like HN400x200 H-section steel) under specified loading and fire curves. The fire resistance limit is determined by the time until the specimen loses load-bearing capacity or reaches a critical average temperature of 538°C.
FAQs
What products are regulated under GB 14907-2018?
It applies to all types of fire resistive coatings applied to the surface of steel structures in buildings and civil engineering works. It covers both indoor and outdoor applications, as well as water-based and solvent-based formulations.
Are there any updates from the previous version of GB 14907?
The 2018 version introduces several updates, including the addition of section factor terminology, new requirements for thermal insulation efficiency deviation and pH value, and the addition of UV radiation resistance testing for outdoor coatings. It also modified the classification and marking of products.
How does GB 14907-2018 classify fire resistive coatings?
The standard distinguishes between ordinary steel structure fire resistive coatings (tested under building fiber fire conditions) and special steel structure fire resistive coatings (tested under hydrocarbon (HC) fire conditions). It also classifies products by expansion type, usage location, and dispersion medium.
The summary above provides a high-level overview of GB 14907-2018. 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 14907-2018 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- 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 14907-2002