GB16807-2025

Fire intumescent seals

防火膨胀密封件

GB 16807-2025 é uma norma nacional chinesa obrigatória que entrará em vigor: Fire intumescent seals. Setor: Construção. Foco: Segurança de produtos. Entrada em vigor: 1 de ago. de 2026.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

This standard applies to the design, manufacturing, and inspection of fire intumescent seals used in building components. It specifically covers seals utilized in fire doors, fire windows, fire rolling shutters, fire valves, and fire glass partitions. It is applicable to products that expand under fire or high temperature to provide fire, smoke, and thermal sealing. It does not apply to structural fireproofing coatings or unrelated sealing materials.

Requisitos técnicos

The standard specifies comprehensive physical and chemical parameters for fire intumescent seals. It outlines requirements for appearance, mandating that surfaces be smooth without cracks or significant powdering. Additionally, it regulates the unit length mass deviation and the initial expansion ratio, requiring these values to stay within a 10% deviation of the manufacturer's stated nominal values. A major focus is placed on fire safety characteristics, specifically smoke density and smoke toxicity. The standard classifies these seals into three distinct grades based on their smoke production during combustion, referencing GB/T 8627 and GB/T 20285 methodologies. Products must not perform lower than Grade 3 for both smoke density and toxicity. Furthermore, the standard details rigorous environmental durability requirements. Seals must demonstrate resistance to air aging, water, acidity, alkalinity, and freeze-thaw cycles without significant degradation. A notable addition in this revision is the requirement for UV radiation resistance. Post-aging and environmental exposure, the expansion ratio of the intumescent component must not fall below 90% of its initial value. Finally, the standard establishes fire sealing performance grades (ranging from F0.5 to F3.0) corresponding to the overall fire integrity rating of the building component, ensuring the seal supports the required fire resistance duration.

Métodos de ensaio

The standard mandates specific testing procedures to verify compliance. Expansion performance is evaluated using a specialized high-temperature furnace apparatus to measure the expansion ratio of the intumescent material. Smoke density and toxicity are tested according to the referenced national standards GB/T 8627 and GB/T 20285. Environmental resistance tests involve prolonged immersion in water, acid, and alkaline solutions, alongside air aging and UV radiation exposure tests. The critical fire sealing test is conducted by installing the seal on actual building components and performing a full-scale fire resistance test according to GB/T 9978.1-2008.

Perguntas frequentes

What products are regulated under GB 16807-2025?

This standard regulates fire intumescent seals used in building components such as fire doors, fire windows, fire rolling shutters, fire valves, and fire glass partitions. It applies specifically to seals designed to provide fire, smoke, and thermal isolation during a fire.

Are there any major updates in GB 16807-2025 compared to the previous version?

The 2025 version introduces a new classification and coding method for smoke density, smoke toxicity, and fire sealing grades. It also adds requirements and testing methods for UV radiation resistance and unit length mass deviation, while updating the testing methods for expansion performance and fire sealing. Manufacturers previously compliant with the 2009 version must update their testing and certification to meet these new parameters.

How does GB 16807-2025 differ from international ISO standards for fire seals?

While the standard references general testing principles similar to international norms, it mandates specific Chinese national standards for testing, such as GB/T 8627 for smoke density and GB/T 20285 for smoke toxicity. Overseas engineers must ensure their products are tested according to these specific GB/T testing protocols rather than solely ISO standards to achieve Chinese market compliance.

The summary above provides a high-level overview of GB 16807-2025. 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 16807-2025 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: C84
ICS: 13.220.50
Órgão competente: National Fire and Rescue Administration
Comitê técnico: National Technical Committee on Fire Protection of Standardization Administration of China

Relações

Substitui:GB 16807-2009 (Vigente)