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GB 15322.1-2019: Combustible gas detectors -- Part 1: Point-type combustible gas detectors for industrial and commercial use
GB 15322.1-2019
GB
NATIONAL STANDARD OF THE
PEOPLE?€?S REPUBLIC OF CHINA
ICS 13.220.20
C 81
Replacing GB 15322.1-2003, GB 15322.4-2003
Combustible Gas Detectors - Part 1: Point-type Combustible
Gas Detectors for Industrial and Commercial Use
ISSUED ON: OCTOBER 14, 2019
IMPLEMENTED ON: NOVEMBER 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the People?€?s Republic of China.
Table of Contents
Foreword ... 4
1 Scope ... 6
2 Normative References ... 6
3 Classification ... 7
4 Requirements ... 7
4.1 General Rules ... 7
4.2 Appearance Requirements ... 7
4.3 Performance ... 8
4.4 Response Performance for Detecting Gases other than Methane, Propane and Carbon
Monoxide ... 20
5 Tests ... 21
5.1 Test Outline ... 21
5.2 Basic Performance Test ... 25
5.3 Alarm Action Value Test ... 26
5.4 Measuring Range Indication Deviation Test ... 26
5.5 Response Time Test ... 26
5.6 Orientation Test ... 27
5.7 Alarm Repetition Test ... 27
5.8 High-speed Air Flow Test ... 27
5.9 Sampling Air Flow Changes (only applicable to the air-breathing specimens) ... 27
5.10 Line Transmission Performance Test (only applicable to the systematic specimens)
... 28
5.11 Detector Interchangeability Test (only applicable to the systematic specimens) ... 28
5.12 Voltage Fluctuation Test ... 28
5.13 Insulation Resistance Test ... 28
5.14 Electrical Strength Test ... 29
5.15 Electrostatic Discharge Immunity Test ... 30
5.16 Immunity Test to Radio Frequency Electromagnetic Field Radiation ... 30
5.17 Immunity Test to Electrical Fast Transient / Burst ... 30
5.18 Surge (impact) Immunity Test ... 31
5.19 Immunity Test to Conducted Disturbances, Induced by Radio-frequency Fields ... 31
5.20 High-temperature (operation) Test ... 31
5.21 Low-temperature (operation) Test ... 31
5.22 Constant Damp Heat (operation) Test ... 32
5.23 Vibration (sinusoidal) (operation) Test ... 32
5.24 Vibration (sinusoidal) (durability) Test ... 32
5.25 Drop Test ... 33
5.26 Resistance to Gas Disturbance (except for detectors with a measurement range below
3%LEL) ... 33
5.27 Toxicity Resistance Test ... 33
5.28 Resistance to High-concentration Gas Impact ... 34
5.29 Low-concentration Operation Test ... 34
5.30 Long-term Stability Test ... 34
6 Inspection Rules ... 35
6.1 Exit-factory Inspection... 35
6.2 Type Inspection ... 35
7 Markings ... 36
7.1 General Rules ... 36
7.2 Product Markings ... 36
7.3 Quality Inspection Mark ... 36
Appendix A (normative) Model Designation of Detectors ... 37
Appendix B (normative) Test Equipment for Combustible Gas Detectors... 39
Combustible Gas Detectors - Part 1: Point-type Combustible
Gas Detectors for Industrial and Commercial Use
1 Scope
This Part of GB 15322 specifies the classification, requirements, tests, inspection rules and
marking of point-type combustible gas detectors for industrial and commercial use.
This Part is applicable to point-type combustible gas detectors installed and used in industrial
and commercial places for the detection of hydrocarbons, ethers, esters, alcohols, carbon
monoxide, hydrogen and other combustible gases and vapors (hereinafter referred to as the
?€?detectors?€?). For point-type combustible gas detectors with special properties used in industrial
and commercial places, this Part may also be implemented, unless special requirements are
otherwise specified by relevant standards.
2 Normative References
The following documents are indispensable to the application of this document. In terms of
references with a specified date, only versions with a specified date are applicable to this
document. In terms of references without a specified date, the latest version (including all the
modifications) is applicable to this document.
GB 3836.1-2010 Explosive Atmospheres - Part 1: Equipment - General Requirements
GB/T 9969 General Principles for Preparation of Instructions for Use of Industrial Products
GB 12978 Rules for Test of Fire Electronic Products
GB/T 16838 Environmental Test Methods and Severities for Fire Electronic Products
GB/T 17626.2-2018 Electromagnetic Compatibility - Testing and Measurement Techniques -
Electrostatic Discharge Immunity Test
GB/T 17626.3-2016 Electromagnetic Compatibility - Testing and Measurement Techniques -
Radiated, Radio-frequency, Electromagnetic Field Immunity Test
GB/T 17626.4-2018 Electromagnetic Compatibility - Testing and Measurement Techniques -
Electrical Fast Transient / Burst Immunity Test
GB/T 17626.5-2008 Electromagnetic Compatibility - Testing and Measurement Techniques -
Surge Immunity Test
GB/T 17626.6-2017 Electromagnetic Compatibility - Testing and Measurement Techniques -
Immunity to Conducted Disturbances, Induced by Radio-frequency Fields
have no obvious scratches, cracks, burrs and other mechanical damages, and no loosening of
fastening parts.
4.3 Performance
4.3.1 General requirements
4.3.1.1 Operations, such as: zero-setting, calibration and parameter changes, of the detectors
under power-on conditions shall not change the integrity of their enclosure.
4.3.1.2 The systematic detectors shall be powered by a DC voltage of 36 V or below, and the
independent detectors shall be powered by an AC voltage of 220 V. The detectors powered by
DC voltage shall have protection measures against reversed polarity.
4.3.1.3 The free-diffusion detectors and air-breathing detectors shall have independent working
status indicator lights to respectively indicate their normal monitoring, fault and alarm working
status. If the on-site detection components of the optical fiber sensing detectors do not have
independent working status indicator lights, then, the control and indicating equipment
connected to them shall have independent working status indicator lights to respectively
indicate the working status of each detection component. The normal monitoring status
indication shall be green, the fault status indication shall be yellow, and the alarm status
indication shall be red. The low limit and high limit alarm status indications shall be clearly
distinguishable. The indicator lights shall have Chinese function annotations. Under the
illumination condition of 5 lx ~ 500 lx, and 5 m directly in front, the status of the indicator
lights shall be clearly visible.
NOTE: the normal monitoring status refers to the status when the detectors are powered on and
normally working, without issuing an alarm signal or fault signal.
4.3.1.4 When the combustible gas concentration in the monitored area reaches the alarm set
value, the detectors shall be able to issue an alarm signal. Then, place the detectors in a normal
environment, within 30 seconds, they shall be able to automatically (or manually) return to the
normal monitoring status.
4.3.1.5 The independent detectors shall have an alarm output interface. The type and capacity
of the detectors?€? alarm output interface shall match the supporting products or executive
components specified by the manufacturer and shall be indicated in the instructions for use. If
the detectors?€? alarm output interface has a delay function, its maximum delay time shall not
exceed 30 seconds.
4.3.1.6 The systematic detectors shall be able to output signals corresponding to their measured
concentration and working status. The type and parameters of the signals shall be indicated in
the instructions for use.
4.3.1.7 The independent detectors shall have a concentration display function. Under the
illumination condition of 5 lx ~ 500 lx, and 1 m directly in front, the displayed information shall
be clearly visible.
4.3.1.8 The measuring range and alarm set value of the detectors shall comply with the
following stipulations:
a) For the detectors with a measurement range between 3%LEL ~ 100%LEL, the upper
limit of the measuring range shall be 100%LEL and the low limit alarm set value shall
be within the range of 5%LEL ~ 25%LEL, if there is a high limit alarm set value, it
shall be 50%LEL. If the low limit alarm set value is adjustable, it shall be adjustable
within the range of 5%LEL ~ 25%LEL.
b) For the detectors that detect carbon monoxide, the low limit alarm set value shall be
within the range of 150 ??? 10?€?6 (volume fraction) ~ 300 ??? 10?€?6 (volume fraction). If
there is a high limit alarm set value, it shall be 500 ??? 10?€?6 (volume fraction). If the
low limit alarm set value is adjustable, it shall be adjustable within the range of 150
??? 10?€?6 (volume fraction) ~ 300 ??? 10?€?6 (volume fraction).
c) The detectors with a measurement range below 3%LEL and the detectors with a
measurement range above 100%LEL shall have their measuring range and alarm set
value specified by the manufacturer.
d) The instructions for use of the detectors shall indicate the parameters, such as:
measuring range and alarm set value, etc.
4.3.1.9 When the detectors adopt a plug-in gas sensor, there shall be structural measures to
prevent falling-off. When the gas sensor falls off, the detectors shall be able to issue a fault
signal within 30 seconds.
4.3.1.10 When the sampling pipeline of the air-breathing detectors is blocked or leaked, the
detectors shall be able to issue a fault signal and indicate the type of the fault.
4.3.1.11 The detectors shall adopt an explosion-proof type that satisfies the requirements of GB
3836.1-2010.
4.3.1.12 The model designation of the detectors shall comply with the stipulations of Appendix
A.
4.3.1.13 The instructions for use of the detectors shall satisfy the relevant requirements of GB/T
9969, and the service life of the gas sensor shall be indicated.
4.3.2 Alarm action value
4.3.2.1 In the test items specified in this Part, for the detectors with a measurement range
between 3%LEL ~ 100%LEL, the alarm action value shall not be lower than 5%LEL; for the
detectors that detect carbon monoxide, the alarm action value shall not be lower than 50 ??? 10?€?6
(volume fraction).
4.3.2.2 The difference between the detectors?€? alarm action value and alarm set value shall satisfy
the following requirements:
4.3.5 Orientation
The detectors rotate clockwise within the installation plane specified by the manufacturer, and
rotate 45??? each time, respectively measure the alarm action value of the detectors. The
difference between the alarm action value and the alarm set value shall satisfy the following
requirements:
a) For the detectors with a measurement range between 3%LEL ~ 100%LEL, the
absolute value of the difference between the alarm action value and the alarm set value
shall not be greater than 3%LEL.
b) For the detectors with a measurement range below 3%LEL, the absolute value of the
difference between the alarm action value and the alarm set value shall not be greater
than the larger value between 3% measuring range and 50 ??? 10?€?6 (volume fraction).
For the detectors that detect carbon monoxide, the absolute value of the difference
between the alarm action value and the alarm set value shall not be greater than 50 ???
10?€?6 (volume fraction).
c) For the detectors with a measurement range above 100%LEL, the absolute value of
the difference between the alarm action value and the alarm set value shall not be
greater than 3% measuring range.
4.3.6 Alarm repeatability
Repeat the measurement of the alarm action value for the same detector for 6 times. The
difference between the alarm action value and the alarm set value shall satisfy the following
requirements:
a) For the detectors with a measurement range between 3%LEL ~ 100%LEL, the
absolute value of the difference between the alarm action value and the alarm set value
shall not be greater than 3%LEL.
b) For the detectors with a measurement range below 3%LEL, the absolute value of the
difference between the alarm action value and the alarm set value shall not be greater
than the larger value between 3% measuring range and 50 ??? 10?€?6 (volume fraction).
For the detectors that detect carbon monoxide, the absolute value of the difference
between the alarm action value and the alarm set value shall not be greater than 50 ???
10?€?6 (volume fraction).
c) For the detectors with a measurement range above 100%LEL, the absolute value of
the difference between the alarm action value and the alarm set value shall not be
greater than 3% measuring range.
4.3.7 High-speed air flow
Under the condition that the test air flow rate is 6 m/s ??? 0.2 m/s, measure the alarm action value
of the detectors. The difference between the alarm action value and the alarm set value shall
satisfy the following requirements:
a) For the detectors with a measurement range between 3%LEL ~ 100%LEL, the
absolute value of the difference between the alarm action value and the alarm set value
shall not be greater than 5%LEL.
b) For the detectors with a measurement range below 3%LEL, the absolute value of the
difference between the alarm action value and the alarm set value shall not be greater
than the larger value between 5% measuring range and 80 ??? 10?€?6 (volume fraction).
For the detectors that detect carbon monoxide, the absolute value of the difference
between the alarm action value and the alarm set value shall not be greater than 80 ???
10?€?6 (volume fraction).
c) For the detectors with a measurement range above 100%LEL, the absolute value of
the difference between the alarm action value and the alarm set value shall not be
greater than 5% measuring range.
4.3.8 Sampling air flow changes (only applicable to the air-breathing detectors)
4.3.8.1 Make the detectors operate under the following sampling air flow conditions, and
measure the alarm action value of the detectors:
a) If the sampling flow rate of the detectors is adjustable, respectively adjust the
sampling flow rate to the maximum and minimum flow rates;
b) If the sampling flow rate of the detectors cannot be adjusted, make the sampling flow
rate 50% of the normal flow rate.
4.3.8.2 The difference between the alarm action value and the alarm set value of the detectors
shall satisfy ...