GB/T 9081-2023 English PDF (GB/T9081-2023)

GB/T 9081-2023: Fuel dispensers for motor vehicles
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GB/T 9081-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 75.180.30
CCS N 13
Replacing GB/T 9081-2008
Fuel dispensers for motor vehicles
ISSUED ON: NOVEMBER 27, 2023
IMPLEMENTED ON: JUNE 01, 2024
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 4
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 9
4 Requirements for the whole machine ... 14
4.1 Structure and appearance ... 14
4.2 Explosion-proof performance ... 15
4.3 Metrology performance ... 15
4.4 Electronic system security ... 17
4.5 Air-liquid ratio performance ... 18
4.6 Climate and environmental adaptability ... 19
4.7 Power supply adaptability ... 19
4.8 Electrical safety ... 19
4.9 Adaptability to electromagnetic environment... 20
4.10 Power-down protection and re-display value time ... 21
4.11 Noise ... 21
4.12 Data communication interface ... 21
4.13 Operating performance ... 21
5 Component requirements ... 22
5.1 Flow measurement transducer ... 22
5.2 Coding device ... 23
5.3 Measurement controlling board ... 23
5.4 Indicating devices ... 23
5.5 Security checking device ... 24
5.6 Pump (excluding submersible pump) ... 25
5.7 Control valve ... 25
5.8 Oil hose ... 25
5.9 Pull-off valve ... 26
5.10 Nozzle ... 26
5.11 Refueling vapor recovery system ... 26
6 Test methods ... 27
6.1 Test conditions ... 27
6.2 Structural and appearance inspection ... 28
6.3 Explosion-proof performance inspection ... 28
6.4 Running performance test ... 28
6.5 Metering performance test ... 29
6.6 Electronic system safety test ... 30
6.7 Air-liquid ratio performance test ... 30
6.8 Climate environment adaptability test ... 30
6.9 Power supply adaptability test ... 31
6.10 Electrical safety test ... 31
6.11 Electromagnetic environment adaptability test ... 31
6.12 Power-down protection and re-display time test ... 32
6.13 Noise detection ... 32
6.14 Gas separation capability test ... 33
6.15 Hoses inner volume change test ... 33
7 Inspection rules ... 33
7.1 Inspection types ... 33
7.2 Inspection items ... 33
7.3 Type inspection ... 36
7.4 Exit-factory inspection ... 36
7.5 Determination rules ... 36
8 Sign, seal, accompanying documents ... 37
8.1 Sign ... 37
8.2 Seal ... 37
8.3 Accompanying documents ... 38
9 Packaging, transportation, storage ... 38
9.1 Packaging ... 38
9.2 Transport ... 38
9.3 Storage ... 39
Appendix A (Normative) Electronic system security testing ... 40
A.1 General requirements inspection ... 40
A.2 Self-locking function test ... 40
A.3 Test of validation function ... 41
Appendix B (Normative) Air-liquid ratio performance test ... 44
B.1 Test equipment ... 44
B.2 Test procedures ... 44
Appendix C (Informative) Test record format ... 46
C.1 Format of inspection item record ... 46
C.2 Record format of electronic system safety test ... 48
C.3 Record format of air-liquid ratio performance test ... 51
C.4 Record format of noise detection test ... 52
References ... 54
Fuel dispensers for motor vehicles
1 Scope
This document specifies the technical requirements, inspection items and methods,
inspection rules, requirements for marking, sealing, packaging, transportation and
storage of fuel dispensers for motor vehicle (hereinafter referred to as dispensers).
This document applies to the design, manufacturing, and acceptance of fuel dispensers.
This document applies to gas dispensers used in fixed gas stations and gas stations with
skid-mounted car refueling devices. Please refer to this document for gas dispensers
used in mobile refueling trucks.
2 Normative references
The contents of the following documents constitute essential provisions of this
document through normative references in the text. Among them, for dated reference
documents, only the edition corresponding to the date applies to this document; for
undated reference documents, the latest edition (including all amendments) applies to
this document.
GB/T 191 Packaging - Pictorial marking for handling of goods
GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements
GB/T 3836.2 Explosive atmospheres - Part 2: Equipment protection by flameproof
enclosures "d"
GB/T 3836.3 Explosive atmospheres - Part 3: Equipment protection by increased
safety "e"
GB/T 3836.4 Explosive atmospheres - Part 4: Equipment protection by intrinsic
safety "i"
GB/T 3836.9 Explosive atmospheres Part 9: Equipment protected by casting type
"m"
GB/T 3836.15 Explosive atmospheres - Part 15: Electrical installations design,
selection and erection
GB/T 3836.28 Explosive atmospheres - Part 28: Non-electrical equipment for
explosive atmospheres - Basic method and requirements
4.3.3 Minimum specified volume quantity
The minimum specified volume quantity of the fuel dispenser shall be ≤ 0.01 L.
4.3.4 Maximum permissible error
The maximum permissible error of the fuel dispenser shall meet the following
requirements.
- When Qmax ≤ 200 L/min, the maximum permissible error of the volume indication
error of the fuel dispenser is ±0.30%; its repeatability is ≤ 0.10%.
- When Qmax > 200 L/min, the maximum permissible error of the volume indication
error of the fuel dispenser is ±0.50%; its repeatability is ≤ 0.17%.
- The maximum permissible error of the minimum measured quantity is ±0.50%; its
repeatability is ≤ 0.17%.
4.3.5 Payment amount error
The payment amount displayed by the fuel dispenser shall not be greater than the
payment amount, which is calculated by multiplying the unit price and the volume
indication value; the absolute value of the difference between the two shall not exceed
the minimum specified price deviation.
4.3.6 Flow interruption indication error
If the oil circuit is suddenly closed during the refueling process, the volume indication
error and payment amount indication error shall meet the requirements of 4.3.4 and
4.3.5, respectively.
4.3.7 Counting indication range
The range of counting indications shall meet the requirements of measurement accuracy.
The requirements for the indication range are as follows:
- The payment amount and transaction volume shall be no less than 6 significant
figures, including 2 digits after the decimal point and no less than 4 digits before
the decimal point;
- The unit price must be no less than 4 significant figures, including 2 digits after the
decimal point and no less than 2 digits before the decimal point;
- The electronic cumulative amount shall not be less than 10 significant figures.
4.3.8 Measuring endurance
After the fuel dispenser operates for 100 hours at 80% to 100% of the maximum flow
rate as shown on the nameplate, the average value of the indication error and
measurement repeatability of each measurement point shall meet the requirements of
4.3.4. Compared with the indication error before 100 hours of operation, at the same
flow point, the absolute value of the indication error change shall be ≤ 0.30%.
4.4 Electronic system security
4.4.1 General requirements
4.4.1.1 There shall be no circuit on the measurement controlling board, that can
disconnect or attach the communication channel between the monitoring
microprocessor and the security checking device.
4.4.1.2 There shall be no circuit on the measurement controlling board, that can
disconnect or attach the communication channel between the monitoring
microprocessor and the indicating device.
4.4.1.3 There shall be no circuit on the measurement controlling board, that can open
the control valve alone. The control valve shall be opened jointly by the metering
microprocessor and the monitoring microprocessor.
4.4.1.4 The monitoring microprocessor shall integrate the storage unit and real-time
clock. The storage unit and real-time clock have no external access interface.
4.4.1.5 The measurement software shall be designed in accordance with the software
requirements for category II metering instrument in Chapter 6 of GB/T 42555-2023 and
the medium software protection level as specified in 5.1.1 of JJF 1182-2021. The overall
design, detailed design, data protection mechanism, software interface, etc. of the
software process shall be clearly described. Relevant software modules shall have
online upgrade functions. The upgrade operation shall be carried out after online
validation. The relevant information required for online validation shall be encrypted
and stored in the storage medium. The software upgrade of the legal metrology part
shall comply with the relevant provisions of 6.2.8.2 in GB/T 42555-2023.
4.4.1.6 The encryption algorithm used by the system shall be one or more of the
symmetric encryption algorithm (3DES, AES), the asymmetric encryption algorithm
(RAS) or the national secret algorithm (SM1, SM2). It shall have the function of online
key update.
4.4.1.7 The fuel dispenser used for domestic oil trade settlement shall have self-locking
and validation functions.
4.4.2 Self-locking function
4.4.2.1 The fuel dispenser shall be able to activate the self-locking function through
special equipment.
realize closed-loop control and automatically adjust the air-liquid ratio, to meet the
requirements of 5.3 in GB 20952-2020.
4.6 Climate and environmental adaptability
Under the following environmental conditions, the fuel dispenser shall perform
normally and meet the requirements of 4.3.4.
- Temperature: -25 °C ~ +55 °C.
- Relative humidity: ≤ 95%.
- Atmospheric pressure: 86 kPa ~ 106 kPa.
4.7 Power supply adaptability
The fuel dispenser shall perform normally in a power supply environment, which has a
nominal voltage (allowed fluctuation range is -15% ~ +10%) and maximum frequency
variation of ±1 Hz (except DC power supply), meanwhile meet the requirements of
4.3.4.
4.8 Electrical safety
4.8.1 The conductive parts in contact with the protective grounding terminal and
connecting end of the fuel dispenser shall be selected according to Appendix N in GB
4943.1-2022, so that the potential difference between any two different metals is equal
to or less than 0.6 V.
4.8.2 The connection resistance -- between the protective grounding terminal or
grounding contact of the fuel dispenser and the components that need to be grounded -
- shall not be greater than 0.1 Ω.
4.8.3 The contact current of the fuel dispenser shall not be greater than 5 mA.
4.8.4 The fuel dispenser shall meet the electrical strength requirements of category I
overvoltage equipment. An AC test voltage, which has an effective value of 1500 V and
a frequency of 50 Hz, shall be applied between the primary circuit and the fuel dispenser
or between the primary circuit and the secondary circuit for 60 seconds. There shall be
no insulation breakdown during the test. The test voltage of the electric strength test for
exit-factory inspection can be reduced by 10%; the duration shall be 1 s ~ 4 s.
4.8.5 The resistance value of the refueling nozzle and the anti-static grounding to the
ground shall be less than 1 × 106 Ω.
4.9 Adaptability to electromagnetic environment
4.9.1 General requirements
The entire fuel dispenser shall be tested for electrostatic discharge immunity, radio
frequency electromagnetic field radiation immunity, electrical fast transient pulse group
immunity, voltage sag, short interruption and voltage change immunity, surge (shock)
immunity test. During the above test process and after the test is completed, the function
of the fuel dispenser shall be normal; the following phenomena shall not occur:
- Device failure or unexpected action;
- Change or loss of stored data;
- Restore to factory settings;
- Change of operating mode;
- Confusion or errors in data display;
- Keyboard operation failure.
Note: Normal functions refer to normal functions such as start and stop of the fuel dispenser,
unit price setting, zero return.
4.9.2 Electrostatic discharge immunity
The electrostatic discharge immunity's severity level shall reach the Level 3 test level
specified in GB/T 17626.2-2018:
- Air discharge: Test voltage ±8 kV;
- Contact discharge: Test voltage ±6 kV.
4.9.3 Radio frequency electromagnetic field radiation immunity
The severity level of radio frequency electromagnetic field radiation immunity shall
reach the Level 3 test level specified in GB/T 17626.3-2016:
- Frequency range: 80 MHz ~ 1000 MHz;
- Test field strength: 10 V/m.
4.9.4 Electrical fast transient burst immunity
The severity level of electrical fast transient burst immunity shall reach the Level 3 test
level specified in GB/T 17626.4-2018:
the factory; the test results shall meet the following requirements.
- All parts are not loose and work normally, flexibly, harmoniously, reliably.
- There is no leakage or abnormal noise in the hydraulic oil circuit during operation.
5 Component requirements
5.1 Flow measurement transducer
5.1.1 The appearance shall be subject to good surface treatment; it shall be free of
visible burrs, scratches, cracks, rust or mildew and other defects.
5.1.2 A flow direction mark shall be marked on an obvious part of the shell.
5.1.3 There shall be a nameplate on the exterior; the nameplate shall indicate:
- Manufacturer name;
- Flow measurement transducer model;
- Measuring range;
- Maximum permissible error;
- Nominal pressure;
- Exit-factory number.
5.1.4 The maximum permissible error is ±0.20%; the repeatability error shall be ≤
0.07%.
5.1.5 The ratio -- of the maximum flow rate Qmax to the minimum flow rate Qmin -- shall
not be less than 10:1.
5.1.6 No leakage when withstanding oil pressure 1.5 times the pump outlet pressure.
5.1.7 A mechanical adjustment device can be equipped to adjust the flow meter so that
the indication error is close to zero. The adjustment device and the shell shall have a
reliable sealing mechanism, to prevent components from being a...