GB7956.3-2014

Fire fighting vehicles―Part 3：Foam fire fighting vehicle

消防车第3部分：泡沫消防车

GB 7956.3-2014 é uma norma nacional chinesa obrigatória vigente: Fire fighting vehicles―Part 3：Foam fire fighting vehicle. Setor: Automotivo. Foco: Segurança de produtos. Entrada em vigor: 1 de jul. de 2015.

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 foam fire fighting vehicles, which are primarily equipped with vehicle-mounted fire pumps, water tanks, foam liquid tanks, and water-foam mixing equipment. It is mandatory for manufacturers producing foam fire trucks for the Chinese market. However, this standard does *not* apply to compressed air foam fire fighting vehicles or high-expansion foam fire fighting vehicles.

Requisitos técnicos

The standard specifies comprehensive technical requirements for foam fire fighting vehicles, building upon the general requirements in *GB 7956.1-2014*. It covers vehicle-level specifications such as fuel tank capacity, control panel layouts, and operational instructions. Manufacturers must ensure all automatic control mechanisms have manual emergency measures. For the fire hydraulic system, the standard details requirements for fire pumps, piping layouts, and tank specifications. It mandates specific color-coding for different pipelines, such as deep green for intake pipes and deep yellow for foam liquid pipes. The standard also sets performance criteria for water tanks and foam liquid tanks, including volume tolerances, anti-surge baffle configurations, and static pressure resistance. The vehicle-mounted foam system requirements focus on the foam proportioner, foam monitors, and mixing accuracy. The system must include a flushing device to prevent cross-contamination between water and foam liquids. It also specifies performance limits for both negative-pressure and positive-pressure foam proportioners, including vacuum tightness and pressure differential criteria. Additionally, the standard outlines requirements for continuous operation, overload operation, and the equipping of necessary fire-fighting tools and equipment. Fire trucks must pass a 6-hour continuous operation test without abnormal vibrations or leaks. It also references *GB 6245-2006* and *GB 19156* for pump and fire monitor compliance.

Métodos de ensaio

The standard outlines various testing methods to verify compliance, including: - Continuous operation test: Running the vehicle for 6 hours under specified conditions to check engine and pump stability. - Static pressure tests: Applying specific hydrostatic pressures to pipelines, tanks, and proportioners to check for leaks and structural integrity. - Foam system accuracy test: Using refractometers or conductivity meters to measure the mixing ratio accuracy of the foam system. - Vacuum and sealing tests: Measuring the maximum vacuum degree and pressure drop over time to ensure the priming system's tightness. - Fire monitor performance test: Measuring foam range, expansion ratio, and 25% drainage time under specific angles and wind conditions.

Perguntas frequentes

What products are regulated under GB 7956.3-2014?

GB 7956.3-2014 regulates foam fire fighting vehicles equipped with fire pumps, water tanks, foam liquid tanks, and mixing systems. It excludes compressed air and high-expansion foam vehicles.

Are there any mandatory requirements for the control panel in GB 7956.3-2014?

Yes, the standard mandates that all automatic control mechanisms must have manual emergency measures. It also requires specific pressure displays, engine speed controllers, and clear operational instructions on the panel.

How does GB 7956.3-2014 address the foam proportioning system?

The standard specifies strict requirements for the vehicle-mounted foam system, including mixing ratio accuracy, vacuum tightness for negative-pressure proportioners, and automatic shut-off for positive-pressure foam pumps. The system must also include a flushing device to prevent contamination.

The summary above provides a high-level overview of GB 7956.3-2014. To ensure complete compliance for your foam fire fighting vehicles entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 7956.3-2014 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: C84
ICS: 13.220.10
Órgão competente: National Fire and Rescue Administration
Comitê técnico: National Technical Committee on Fire Protection of Standardization Administration of China