GB4716-2024

Point type heat fire detectors

点型感温火灾探测器

GB 4716-2024 é uma norma nacional chinesa obrigatória vigente: Point type heat fire detectors. Setor: Construção. Foco: Segurança de produtos. Entrada em vigor: 1 de dez. de 2025.

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 point type heat fire detectors used in industrial and civil buildings. It covers the design, manufacture, and inspection of these fire safety devices. It is mandatory for all manufacturers producing heat detectors for the Chinese market. The standard does not apply to special fire detectors covered by other specific standards.

Requisitos técnicos

The standard specifies comprehensive requirements for point type heat fire detectors, including structural integrity, component performance, and control software reliability. Detectors are classified into categories A1, A2, B, C, D, E, F, and G based on their typical application temperature and maximum application temperature limits. Manufacturers must ensure detectors correctly signal fire alarms and faults within defined temperature ranges. Key performance requirements include response time under various heating rates, action temperature limits, and high-temperature response capabilities. The standard also introduces new requirements for fault monitoring of heat elements and data output functions for addressable detectors. Detecting element faults like short circuits or disconnections must trigger a fault signal within 100 seconds. Additionally, the standard mandates robustness against environmental and mechanical stresses. Detectors must withstand climatic environment tests (such as low temperature, humidity, and SO2 corrosion), mechanical environment tests (including shock, impact, and vibration), and electromagnetic compatibility (EMC) tests. Response time consistency must be maintained before and after these rigorous environmental exposures.

Métodos de ensaio

Testing involves a series of evaluations using a standard temperature chamber to measure response times across different orientations and heating rates. Key tests include the orientation test, action temperature test, and response time test under varying rates of temperature increase. Detectors are evaluated for consistent performance in both maximum and minimum response time orientations. Environmental and durability testing includes low-temperature operation, damp heat endurance, and SO2 corrosion tests. Mechanical integrity is verified through shock, collision, and vibration tests, while a newly added drop test assesses structural resilience. Electromagnetic immunity is validated through ESD, radiated RF, and surge tests in accordance with GB/T 17626 series standards.

Perguntas frequentes

What products are regulated under GB 4716-2024?

The standard applies to point type heat fire detectors used in industrial and civil buildings. It is mandatory for the design, manufacture, and inspection of these specific fire safety products.

Are there any updates from the previous version of GB 4716?

The 2024 version introduces several updates, including new requirements for fault monitoring of heat elements, data output functions, drop tests, and stricter response time consistency requirements before and after environmental tests.

How does GB 4716-2024 classify heat detectors?

The standard categorizes detectors into classes A1 through G based on application temperatures, with additional S-type and R-type variants. Manufacturers must ensure their products meet the specific response time and temperature thresholds for their declared class.

The summary above provides a high-level overview of GB 4716-2024. 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 4716-2024 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: C81
ICS: 13.220.20
Órgão competente: National Fire and Rescue Administration
Comitê técnico: National Technical Committee on Fire Protection of Standardization Administration of China

Relações

Substitui:GB 4716-2005