GB20517-2025
Self-contained smoke alarms using scattered light or transmitted light
独立式感烟火灾探测报警器
GB 20517-2025 is a current mandatory Chinese national standard for Self-contained smoke alarms using scattered light or transmitted light. It appears in the Construction compliance cluster with a product safety focus and has an implementation date of Jun 1, 2026.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to self-contained smoke alarms using scattered light or transmitted light principles, specifically designed for use in industrial and civil buildings. It covers the design, manufacturing, and inspection of these standalone fire safety devices. It is not applicable to smoke detectors integrated into larger fire alarm systems or those utilizing ionization principles.
Technical requirements
The standard mandates that alarms must be powered solely by internal batteries and utilize optical (scattered or transmitted light) detection methods. It specifies critical operational features, including fire alarm functionality, wireless and manual silencing mechanisms, and self-diagnostic capabilities. Manufacturers must ensure alarms feature data recording for at least 20 events and clear indicator lights visible from 6 meters. Regarding performance, the standard sets strict limits on response thresholds (measured in dB/m), ensuring consistency and repeatability across different orientations and airflow conditions. It also defines the required sound pressure level, which must gradually increase to a specific decibel range to ensure audibility. Alarms must also feature a battery fault warning system that triggers before power loss critically impairs operation. The standard outlines rigorous environmental tolerances, requiring alarms to withstand high and low temperatures, humidity, SO2 corrosion, and mechanical shocks. Furthermore, it includes electromagnetic compatibility (EMC) requirements to prevent false alarms from radio frequency interference or electrostatic discharge. Alarms must also include a sensor contamination warning feature to alert users when dirt or debris affects performance.
Testing methods
Testing procedures evaluate the alarm's response threshold using a specialized smoke test chamber (detailed in Appendix A). Key tests include the orientation test (measuring consistency across 8 rotational angles), repeatability and consistency tests, and battery fault performance evaluations. Environmental reliability is verified through high/low temperature, damp heat cyclic, and SO2 corrosion tests. Mechanical integrity is assessed via impact, collision, and vibration tests. Fire sensitivity is rigorously tested using four standardized test fires (SH1 to SH4) representing different combustion materials.
FAQs
What products are regulated under GB 20517-2025?
GB 20517-2025 applies to self-contained smoke alarms using scattered light or transmitted light principles, designed for use in industrial and civil buildings. It is mandatory for the design, manufacture, and inspection of these specific fire safety products in China.
Are there any significant updates from the previous GB 20517-2006 version?
The 2025 version introduces several major updates, including the addition of wireless communication functions, data recording and export capabilities, and sensor contamination alarm requirements. It also updates EMC testing criteria and removes outdated electrical tests like insulation resistance and voltage withstand tests.
How does GB 20517-2025 differ from international standards like ISO?
While GB 20517-2025 shares the fundamental goal of ensuring smoke alarm reliability with international standards like ISO or EN 14604, it incorporates specific Chinese compliance requirements. These include unique test fire definitions (SH1 to SH4), mandatory infrared remote silencing acceptance, and specific dust contamination testing procedures not typically found in ISO standards.
The summary above provides a high-level overview of GB 20517-2025. 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 20517-2025 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Product
- CCS
- C81
- ICS
- 13.220.20
- Competent department
- National Fire and Rescue Administration
- Technical committee
- National Technical Committee on Fire Protection of Standardization Administration of China
Relationships
Replaces:GB 20517-2006