GB28376-2012

Fireproof board for tunnels

隧道防火保护板

GB 28376-2012 é uma norma nacional chinesa obrigatória vigente: Fireproof board for tunnels. Setor: Construção. Foco: Segurança de produtos. Entrada em vigor: 1 de set. de 2012.

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 fireproof boards for tunnels used on the concrete structure surfaces of highway and urban traffic tunnels. It is mandatory for manufacturers producing fireproofing materials for these specific infrastructure projects. Railway tunnels may refer to this standard, though it is primarily designed for road and city transit applications.

Requisitos técnicos

GB 28376-2012 specifies the technical requirements for single-composition and multi-composition tunnel fireproof boards. The standard categorizes these boards based on their heating curves, including BZ, HC, and RABT types, ensuring they meet strict structural and safety benchmarks. The standard outlines critical physical and chemical parameters, including dry-state bending strength, moisture deformation rate, and anti-halogen properties. Manufacturers must ensure that the boards exhibit no cracking, delamination, or shedding after exposure to water, acid, alkali, and freeze-thaw cycles. Furthermore, the standard mandates specific combustion performance metrics, such as the fire growth rate index (FIGRA) and total heat release, to minimize fire hazards. It also references GB/T 20285 for smoke toxicity, requiring boards to meet a minimum safety grade to protect tunnel occupants.

Métodos de ensaio

Testing procedures involve rigorous physical and chemical evaluations. Bending strength is tested in both dry and water-saturated states, while moisture deformation is measured after specific immersion and drying cycles. Fire resistance tests are conducted using standard, HC, and RABT heating curves on C30 concrete substrates. Combustion performance is evaluated according to GB/T 20284 and GB/T 8626.

Perguntas frequentes

What products are regulated under GB 28376-2012?

It regulates fireproof boards installed on the concrete surfaces of highway and urban traffic tunnels.

Are there any updates from the previous version of GB 28376-2012?

This is the foundational release of the standard, establishing the baseline requirements for tunnel fireproof boards.

How does GB 28376-2012 differ from ISO standards?

It specifically addresses the unique fire scenarios of tunnels using BZ, HC, and RABT heating curves, which are tailored to Chinese infrastructure requirements and referenced local standards.

The summary above provides a high-level overview of GB 28376-2012. 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 28376-2012 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