GB 12791-2025 Point-type flame detectors English, Anglais, Englisch, Inglés, えいご
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ICS 13.220
CCS H 57
National Standard of the People's Republic of China
GB 12791-2025
Replaces GB 12791-2006
Point-type flame detectors
点型火焰探测器
Issue date: 2025-10-31 Implementation date: 2026-05-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification and Nomenclature
5 Requirements
5.1 General Requirements
5.2 Appearance
5.3 Indicator Lights
5.4 Auxiliary Equipment Connection
5.5 Factory Settings Adjustment
5.6 Field Sensitivity Adjustment
5.7 Control Software
5.8 User Manual
5.9 Connection Fault Monitoring
5.10 Reproducibility
5.11 Repeatability
6 Tests
6.1 General Requirements
6.2 Appearance Inspection
6.3 Functional Design Check
6.4 Connection Fault Monitoring Test
6.5 Reproducibility Test
6.6 Repeatability Test
6.7 Directional Dependence Test
6.8 Fire Sensitivity Test
6.9 Optical Surface Contamination Test
6.10 Artificial Light Interference Test
6.11 Sunlight Interference Test
6.12 Thermal Interference Test
6.13 High Temperature (Operating) Test
6.14 Low Temperature (Operating) Test
6.15 Damp Heat (Cyclic) (Operating) Test
6.16 Damp Heat (Constant) (Endurance) Test
6.17 Sulfur Dioxide (SO₂) Corrosion (Endurance) Test
6.18 Salt Spray Test
6.19 Shock (Operating) Test
6.20 Bump Test
6.21 Vibration (Sinusoidal) (Operating) Test
6.22 Vibration (Sinusoidal) (Endurance) Test
6.23 Radio-Frequency Electromagnetic Field Radiation Immunity Test
6.24 Immunity to Conducted Disturbances from Radio-Frequency Fields
6.25 Electrostatic Discharge Immunity Test
6.26 Electrical Fast Transient/Burst Immunity Test
6.27 Surge Immunity Test
6.28 Power Supply Parameter Fluctuation Test
6.29 Ingress Protection (IP) Rating Test
7 Inspection Rules
7.1 Factory Inspection
7.2 Type Inspection
8 Marking
8.1 General Requirements
8.2 Product Marking
8.3 Quality Inspection Marking
Appendix A (Normative) Response Point Measuring Equipment
A.1 Optical Bench
A.2 Radiation Source
A.3 Shutter
A.4 Modulator
A.5 Irradiance Meter
Appendix B (Normative) Test Fire - n-Heptane Fire
B.1 Fuel
B.2 Arrangement
B.3 Ignition Method
B.4 Test Termination Criteria
Appendix C (Normative) Test Fire - Methylated Spirit Fire
C.1 Fuel
C.2 Arrangement
C.3 Ignition Method
C.4 Test Termination Criteria
Appendix D (Normative) Optical Surface Contamination Simulation
D.1 Neutral Density Filter
D.2 Optical Surface Contamination Simulation
Appendix E (Normative) Artificial Light Interference Test Equipment
E.1 Installation
E.2 Arrangement
E.3 Light Source
E.4 Power Supply
1 Scope
This document defines the terminology for point flame detectors, specifies the classification and naming, requirements, inspection rules, and marking, and describes the corresponding test methods.
This document applies to the design, manufacture, and inspection of point flame detectors (hereinafter referred to as "detectors") used in industrial and civil buildings.
2 Normative References
The contents of the following documents, through normative citations in this document, constitute essential provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 4208-2017 Degrees of protection provided by enclosure (IP Code)
GB/T 9969 General principles for instructions for use of industrial products
GB 12978 Inspection rules for fire electronic products
GB/T 16838 Environmental test methods and severity levels for fire electronic products
GB/T 17626.2 Electromagnetic compatibility - Test and measurement techniques - Electrostatic discharge immunity test
GB/T 17626.3 Electromagnetic compatibility - Test and measurement techniques - Part 3: Radiofrequency electromagnetic field radiation immunity test
GB/T 17626.4 Electromagnetic compatibility - Test and measurement techniques - Immunity to electrical fast transient pulses
/T 17626.5 Electromagnetic compatibility - Test and measurement techniques - Surge (impulse) immunity test
GB/T 17626.6 Electromagnetic compatibility - Test and measurement techniques - Conducted disturbance immunity to radiofrequency fields
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Infrared Flame Detector
A detector that produces alarm decision-related responses only to infrared radiation with wavelengths greater than 850 nm.
3.2 Ultraviolet Flame Detector
A detector that produces alarm decision-related responses only to ultraviolet radiation with wavelengths less than 300 nm.
3.3 Response Point D Value
The maximum distance within 30 seconds that a detector can reliably issue a fire alarm signal when exposed to specific flame radiation.
Note: Dmx, Dmin, and D represent the maximum, minimum, and average values of the response point D values, respectively. The response point D values are determined according to the method specified in 6.1.5.
3.4 Sensitivity
A measure of the detector's ability to detect fires.
3.5 Sensitivity Adjustment
The function to adjust the alarm conditions of the detector or its control and indication equipment to achieve sensitivity changes.
4 Classification and Naming
4.1 Detectors are classified by detection principle as follows:
a) Infrared flame detector (hereinafter referred to as "infrared type");
b) Ultraviolet flame detector (hereinafter referred to as "ultraviolet type");
c) Red-ultraviolet composite flame detector (hereinafter referred to as "composite type").
4.2 Detectors are classified by environmental adaptability as follows:
a)Type A;
b)b) Type B.
c)Note: Type B improves the requirements for light interference resistance (see 5.15), climate environment tolerance (see 5.18), and enclosure protection (see 5.22) compared to Type A. It also adds requirements for optical surface contamination monitoring (see 5.14),
anti-light interference performance (see 5.16), and thermal interference resistance (see 5.17). Type B is marked with (-25°C) or (-40°C) based on the low-temperature (operating) test conditions (see 5.18.1).
4.3 Detectors are classified by sensitivity as follows:
a) Level 1 (25m);
b) Level 2 (17m);
c) Level 3 (12m);
d) Level 1S [indicated by the manufacturer with a distance Lm greater than 25m, marked as 1S(Lm) level].
5 Requirements
5.1 General Requirements
Detectors shall meet the requirements of this chapter and undergo tests according to Chapter 6 to confirm compliance with these requirements.
5.2 Appearance
Detectors shall be supplied in complete factory packaging. The detector surface shall have product markings, and the packaging shall include quality inspection合格 marks and user manuals. The detector surface shall have no signs of corrosion, peeling, or bubbling of the coating layer, no obvious scratches, cracks, burrs, or other mechanical damage, and no loose fastening points.
