GB15322.4-2019
Combustible gas detectors—Part 4: Line-type optical beam combustible gas detectors for industrial and commercial use
可燃气体探测器 第4部分：工业及商业用途线型光束可燃气体探测器
GB 15322.4-2019 is a current mandatory Chinese national standard for Combustible gas detectors—Part 4: Line-type optical beam combustible gas detectors for industrial and commercial use. It appears in the Construction compliance cluster with a product safety focus and has an implementation date of Nov 1, 2020.
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
GB 15322.4-2019 applies to line-type optical beam combustible gas detectors used in industrial and commercial premises that employ the spectral absorption principle to detect combustible gases and vapors such as hydrocarbons, ethers, esters, and alcohols. The standard covers both indoor and outdoor use types. All technical content in this standard is mandatory for manufacturers supplying these detectors to the Chinese market. Detectors with special performance characteristics may also follow this standard unless otherwise specified by relevant standards.
Technical requirements
The standard defines requirements across several key areas. General requirements specify that detectors must be powered by DC voltage of 36V or below with reverse polarity protection, feature independent status indicators (green for normal, yellow for fault, red for alarm), and have a maximum optical path length of 100m. The measurement range upper limit shall not exceed 5 LEL·m, with alarm setpoints between 10% and 70% of the range. Detectors must adopt an explosion-proof type conforming to GB 3836.1-2010. Alarm action performance requirements define threshold concentrations at which the detector must not alarm and must alarm, with a maximum alarm response time of 10 seconds. The standard also specifies range indication deviation limits, requiring display values to remain within defined tolerances of reference values. Environmental adaptability requirements cover resistance to light intensity attenuation (up to 90% for outdoor types), beam deflection, optical interference, and steam interference. Detectors must maintain normal monitoring and alarm performance under these conditions. Electromagnetic compatibility requirements include immunity to electrostatic discharge, RF electromagnetic fields, electrical fast transients, surges, and conducted disturbances per the referenced GB/T 17626 series. Climate and mechanical environment requirements specify operating temperature ranges (e.g., -40°C to 70°C for outdoor types), humidity endurance, salt spray resistance, vibration resistance, and drop test conditions. Long-term stability testing requires 28 days of continuous operation without false alarms or faults.
Testing methods
The standard mandates a comprehensive testing program using 3 test samples. Key tests include: basic performance test (verifying construction, power supply, indicators, and alarm output interfaces); alarm action performance test (using gas chambers to verify alarm thresholds and response times); light intensity attenuation test (using optical attenuators); beam deflection test (verifying performance at maximum allowable angular deflection); optical interference test (exposing the receiver to 800±50 W/m² radiation); and steam interference test (per Annex A, using boiling water vapor). Electromagnetic compatibility tests follow the GB/T 17626 series, while environmental tests follow GB/T 16838 and GB/T 2423.17-2008. The standard also requires voltage fluctuation testing at 85% and 115% of rated voltage.
FAQs
What products are regulated under GB 15322.4-2019?
GB 15322.4-2019 regulates line-type optical beam combustible gas detectors designed for industrial and commercial use. These detectors use spectral absorption principles to detect combustible gases and vapors including hydrocarbons, ethers, esters, and alcohols. Both indoor and outdoor use types are covered.
Is GB 15322.4-2019 a mandatory standard?
Yes, all technical content in GB 15322.4-2019 is mandatory. Manufacturers must comply with all specified requirements, including construction, performance, environmental adaptability, electromagnetic compatibility, and marking requirements for their products to be legally sold in China.
What is the relationship between GB 15322.4-2019 and other parts of GB 15322?
GB 15322 is a multi-part standard series covering combustible gas detectors. Part 4 specifically addresses line-type optical beam detectors for industrial and commercial use. Other parts cover point-type detectors (Part 1), household detectors (Part 2), and portable detectors (Part 3). Part 4 references GB 15322.1-2019 for model numbering conventions and shares common testing principles across the series.
The summary above provides a high-level overview of GB 15322.4-2019. To ensure complete compliance for your line-type optical beam combustible gas detectors entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 15322.4-2019 today to access all detailed parameters, test conditions, tables, and procedures needed for certification and regulatory approval.
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