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GB 15322.1-2019 PDF in English


GB 15322.1-2019 (GB15322.1-2019) PDF English
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GB 15322.1-2019: PDF in English

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 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.
4.3.9 Line transmission performance (only applicable to the systematic detectors)
Respectively adjust the detectors’ power supply voltage to 85% and 115% of the rated voltage
and measure the detectors’ alarm action value. 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.
4.3.12 Insulation resistance
When the working voltage of the external live terminals and power plug of the detectors is
greater than 50 V, the insulation resistance between the external live terminals, power plug and
the enclosure shall not be less than 100 M under normal atmospheric conditions.
4.3.13 Electrical strength
When the working voltage of the external live terminals and power plug of the detectors is
greater than 50 V, the external live terminals and power plug shall be able to withstand an
electrical strength test with a frequency of 50 Hz and an AC voltage of r.m.s voltage 1,250 V
for a duration of 60 seconds. During the test, the detectors shall not manifest any disruptive
discharge. After the test, the detectors shall be functioning normally.
4.3.14 Electromagnetic compatibility
The detectors shall be able to withstand the various tests under the electromagnetic disturbance
conditions specified in Table 1. During the test, the detectors shall not issue an alarm signal or
fault signal. After the test, the difference between the alarm action value and the alarm set value
of the detectors 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).
Make the detectors respectively work in the following gas disturbance environments for 30
minutes. During this period, the detectors shall not issue an alarm signal or fault signal:
a) Acetic acid: (6,000  200)  106 (volume fraction);
b) Ethanol: (2,000  200)  106 (volume fraction).
After being subjected to the disturbance by each gas, put the detectors under the normal
monitoring status for 1 hour, then, measure the alarm action value. The difference between the
alarm action value and the alarm set value of the detectors 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 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.
4.3.18 Toxicity resistance
Make the two detectors work in the following mixed gas environment for 40 minutes. During
this period, the detectors shall not issue an alarm signal or fault signal (the detectors with a
measurement range below 3%LEL may issue an alarm signal):
a) A mixed gas with a combustible gas concentration of 1%LEL [for the detectors that
detect carbon monoxide, the carbon monoxide concentration is 10  106 (volume
fraction)] and a hexamethyl disiloxane vapor concentration of (10  3)  106 (volume
fraction);
b) A mixed gas with a combustible gas concentration of 1%LEL [for the detectors that
detect carbon monoxide, the carbon monoxide concentration is 10  106 (volume
fraction)] and a hydrogen sulfide concentration of (10  3)  106 (volume fraction).
After environmental disturbance, put the detectors under the normal monitoring status for 20
minutes, then, respectively measure the alarm action value. The difference between the alarm
action value and the alarm set value of the two detectors 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 10%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 10% measuring range and 160  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 160
 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 10% measuring range.
4.3.19 Resistance to high-concentration gas impact
Transmit the test gas with a volume fraction of 100% (for the detectors that detect carbon
monoxide, use test gas with a volume fraction of 150% measuring range) to the sampling part
of the detectors at a flow rate of 500 mL/min, and maintain for 2 minutes. Put the detectors
under the normal monitoring status for 30 minutes, then, measure the alarm action value. 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.
4.3.20 Low-concentration operation
Make the detectors work in an environment where the combustible gas concentration is 20% of
the low limit alarm set value for 4 hours. During the operation, the detectors shall not issue an
alarm signal or fault signal. Put the detectors under the normal monitoring status for 20 minutes,
then, measure the alarm action value. 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
5.2 Basic Performance Test
5.2.1 Put the specimen in a normal monitoring status; perform operations, such as: zero-setting,
calibration and parameter changes, etc., on the specimen. Check and record whether such
operations change the integrity of the specimen enclosure.
5.2.2 Check and record whether the power supply mode of the specimen complies with the
stipulations of 4.3.1.2.
5.2.3 Check and record whether the indication and function annotation of the specimen working
status indicator light comply with the stipulations of 4.3.1.3.
5.2.4 Introduce the test gas into the specimen to make it issue an alarm signal. Check and record
whether the specimen’s measuring range and alarm set value setting comply with the
stipulations of 4.3.1.8. Put the specimen in a normal environment and start timing. Check and
record the recovery of its alarm state.
5.2.5 Connect the alarm output interface of the specimen to the supporting product or executive
component specified by the manufacturer, so as to make the specimen issue an alarm signal.
Check and record whether the alarm output interface of the specimen takes an action. If the
alarm output interface has a delay function, measure and record its maximum delay time.
5.2.6 Connect the systematic specimen to the combustible gas alarm controller specified by the
manufacturer, introduce the test gas into the specimen, change the working status of the
specimen, check and record the measured concentration and working status indication of the
specimen on the combustible gas alarm controller.
5.2.7 Introduce the test gas into the independent specimen, check and record the concentration
indication of the specimen.
5.2.8 If the gas sensor of the specimen adopts a plug-in structure, check whether it has structural
measures to prevent falling-off. Remove the gas sensor, check and record the fault status
indication of the specimen.
5.2.9 Check the sampling pipeline and sampling hole of the air-breathing specimen, make the
sampling pipeline of the specimen blocked or leaked. Check and record the sampling pipeline
fault indication of the specimen.
5.2.10 Check whether the specimen adopts an explosion-proof type that complies with the
requirements of GB 3836.1-2010.
5.2.11 Check whether the model designation of the specimen complies with the stipulations of
Appendix A.
5.2.12 Check whether the instructions for us of the specimen comply with the relevant
requirements of GB/T 9969, and whether the service life of the gas sensor is indicated.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.