GB4715-2024

Point-type smoke detectors using scattered light, transmitted light or ionization

点型感烟火灾探测器

GB 4715-2024은(는) 현행 중국 강제 국가 표준입니다: Point-type smoke detectors using scattered light, transmitted light or ionization. 산업: 건설. 주제: 제품 안전. 시행일: 2025년 5월 1일.

적용 여부는 제품 범위, 인증 경로, 주관 당국 공고, 전환 규정에 따라 달라집니다. 컴플라이언스 판단에 사용하기 전에 번역을 의뢰하거나 공식 출처를 확인하세요.

컴플라이언스 개요

이 개요는 현재 영어로만 제공됩니다.

적용 범위

This standard applies to the design, manufacturing, and testing of point-type smoke detectors using scattered light, transmitted light, or ionization, intended for use in industrial and civil buildings. It covers both photoelectric and ionization types, including Type A (adjustable response threshold) and Type B (non-adjustable threshold) detectors. Compliance with this standard is mandatory for manufacturers entering the Chinese fire safety market. It does not apply to special fire detectors covered by GB 15631.

기술 요구 사항

The standard outlines comprehensive performance criteria, including smoke response repeatability and consistency across different orientations. It mandates that detectors maintain stable performance under power parameter fluctuations and airflow interference. For photoelectric detectors, specific requirements for ambient light interference resistance and a sensor contamination alarm function are newly introduced. Manufacturers must ensure their products meet these robust environmental and operational stability criteria. Additionally, the standard sets strict guidelines for electromagnetic compatibility (EMC), requiring detectors to withstand radio frequency fields, electrostatic discharges, and electrical fast transients without false alarms. Climate and mechanical environment tolerances are also specified, covering high/low temperature operations, humidity, and impact resistance. GB/T 17626 series standards are referenced for EMC testing protocols. The standard also details fire sensitivity requirements, demanding reliable responses to specific test fires such as wood pyrolysis smoldering, cotton rope smoldering, polyurethane plastic, and n-heptane fires. Furthermore, it specifies structural requirements like indicator lights, wiring terminals, and protection against foreign object ingress. Software-controlled detectors must provide detailed design documentation to prove compliance.

시험 방법

Testing involves a series of rigorous evaluations using a standardized smoke box to measure response thresholds under various conditions. Key tests include the smoke response orientation test, consistency test, and power parameter fluctuation test. Environmental tests cover high/low temperature operation, alternating damp heat, and SO2 corrosion. Mechanical tests include impact and vibration evaluations. Fire sensitivity is assessed using specific test fires (SH1 to SH4) in a dedicated combustion laboratory, while a dust environment simulation device is used to verify the contamination alarm function of photoelectric detectors.

자주 묻는 질문

What products are regulated under GB 4715-2024?

It regulates point-type smoke detectors using scattered light, transmitted light, or ionization used in industrial and civil buildings.

Are there any updates from the previous version of GB 4715?

Yes, the 2024 version introduces classifications for photoelectric detectors, adds wiring terminal requirements, and mandates a sensor contamination alarm function for photoelectric types.

Does GB 4715-2024 apply to combined detectors?

Yes, combined detectors with heat or CO sensing functions must also comply with GB 4716 or GB 15631 respectively.

The summary above provides a high-level overview of GB 4715-2024. 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 4715-2024 today to access all detailed parameters, tables, and testing procedures.

적용 참고 사항

유형: 제품
CCS: C81
ICS: 13.220.20
주관 부처: National Fire and Rescue Administration
기술 위원회: National Technical Committee on Fire Protection of Standardization Administration of China