GB14907-2018

Fire resistive coating for steel structure

钢结构防火涂料

GB 14907-2018 ist eine gültige verbindliche chinesische Nationalnorm: Fire resistive coating for steel structure. Branchencluster: Chemikalien. Schwerpunkt: Produktsicherheit. Inkrafttreten: 1. Juni 2019.

Die Anwendbarkeit hängt vom Produktumfang, dem Zertifizierungsweg, Bekanntmachungen der Behörden und Übergangsregeln ab. Fordern Sie eine Übersetzung an oder prüfen Sie die Quelle, bevor Sie diesen Eintrag für Compliance-Entscheidungen nutzen.

Compliance-Überblick

Dieser Überblick ist derzeit nur auf Englisch verfügbar.

Geltungsbereich und Anwendbarkeit

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.

Technische Anforderungen

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.

Prüfverfahren

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.

Häufige Fragen

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.

Hinweise zur Anwendbarkeit

Normtyp: Produkt
CCS: C84
ICS: 13.220.50
Zuständige Behörde: National Fire and Rescue Administration
Technisches Komitee: National Technical Committee on Fire Protection of Standardization Administration of China

Normbeziehungen

Ersetzt:GB 14907-2002