JJG 1030-2007 PDF English
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JJG 1030-2007: Ultrasonic Flowmeters---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JJG1030-2007
NATIONAL METROLOGY TECHINICAL SPECIFICATION
Ultrasonic Flowmeters
Issued on. AUGUST 21, 2007
Implemented on. NOVEMBER 21, 2007
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine
This Regulation was approved by General Administration of Quality Supervision,
Inspection and Quarantine on August 21, 2007, and shall be implemented since
November 21, 2007.
Jurisdiction organization.
National Flow and Capacity Measurement Technical Committee
Main drafting organizations.
National Institute of Metrology, China
Natural Gas Chengdu Branch, National Crude Oil Large Flowrate Measurement
Station
Participating drafting organizations.
National Water Large Flowrate Measurement Station
Tianjin Institute of Metrological Supervision and Testing
Daniel Measurement and Control Department of Emerson Process Management
Co., Ltd.
Beijing CHANGMIN Tech Co., Ltd.
Beijing WEIYEYUANGUAN Science & Trade Co., Ltd.
Shenzhen JIANHENG Industrial Automation System Co., Ltd.
Tangshan HUIZHONG Instrument Co., Ltd.
National Flow and Capacity Measurement Technical Committee is entrusted for
interpretation of this Regulation.
Replacing “Ultrasonic Flow”
part in JJG 198-1994
Verification Regulation of Ultrasonic
Flowmeters
Main drafters of this Regulation.
Wang, Chi (National Institute of Metrology, China)
Qiu, Fengchun (Natural Gas Chengdu Branch, National Crude Oil Large Flowrate
Measurement Station)
Participating drafters.
Miao, Yusheng (National Water Large Flowrate Measurement Station)
Chen, Xing (Tianjin Institute of Metrological Supervision and Testing)
Wang, Shuishan (Daniel Measurement and Control Department of Emerson
Process Management Co., Ltd.)
Pu, Qihuan (Beijing CHANGMIN Tech Co., Ltd.)
Shi, Lei (Beijing WEIYEYUANGUAN Science & Trade Co., Ltd.)
Xiao, Cong (Shenzhen JIANHENG Industrial Automation System Co., Ltd.)
Zhang, Lixin (Tangshan HUIZHONG Instrument Co., Ltd.)
Table of Contents
1 Scope... 5
2 References... 5
3 Terms and Definitions... 6
4 Overview... 8
5 Requirements of Metrological Performance... 10
6 General Technical Requirements... 11
7 Control of Measuring Instrument... 12
Appendix A Type Evaluation of Ultrasonic Flowmeter... 22
Appendix B Special Requirements of On-site Verification... 33
Appendix C In-use Inspection... 35
Appendix D Installation Requirements of Ultrasonic Flowmeter... 42
Appendix E Format of Verification Certificate (inner page)... 45
Verification Regulation of Ultrasonic Flowmeters
1 Scope
This Regulation is applicable to the type evaluation, initial verification, subsequent
verification and in-use inspection of ultrasonic flowmeters for closed pipes (hereinafter
referred to as flowmeters), which takes time difference method as the principle.
This Regulation is not applicable to the verification of ultrasonic flow measuring
instrument in open channels and closed conduits.
2 References
Through reference, the clauses included in the following standards and regulations
become the clauses of this Regulation.
JJF 1001-1998 General Terms in Metrology and Their Definitions
JJF 1004-2004 Metrological Terms and Their Definitions for Flow Rate
GB 3836 Electrical Apparatus for Explosive Gas Atmospheres
GB/T 18604-2001 Measurement of Natural Gas Flow by Ultrasonic Flow Meter
GB 17820-1999 Natural Gas
GB 50251-2003 Code for Design of Gas Transmission Pipeline Engineering
GB/T 13609-1999 Natural Gas - Sampling Guidelines
GB/T 13610-2003 Analysis of Natural Gas by Gas Chromatography
GB/T 17747.2-1999 Natural Gas - Calculation of Compression Factor - Part 2.
Calculation Using Molar - Composition Analysis
ISO 17089.2004 (CD) Measurement of Fluid Flow in Closed Conduits - Ultrasonic
Meters for Gas; Meters for Fiscal and Allocation Measurement
3 Terms and Definitions
3.1 Ultrasonic Flowmeter
Ultrasonic flowmeter refers to a flowmeter which utilizes the transmission characteristic
of ultrasonic wave in fluid to measure flow.
3.6 Acoustic Path
Acoustic path refers to the actual path of ultrasonic signal’s transmission among paired
ultrasonic transducers.
3.7 Transmission Angle
Transmission angle refers to the included angle between acoustic path and pipeline’s
axes.
3.8 Single-path Meter
Single-path meter refers to a flowmeter that merely has one pair of transducers.
3.9 Dual-paths Meter
Dual-paths meter refers to a flowmeter that has two pairs of transducers.
3.15 Signal Processing Unit
Signal processing unit is constituted of electronic components and microprocessor
system. It is a part of flowmeter.
3.16 Transition Flowrate (qt)
Transition flowrate refers to a flow value between the maximum flow and the minimum
flow. It segments the range of flow into two zones with different allowable errors,
namely, “high zone” and “low zone”.
4 Overview
4.1 Operating Principle
Flowmeter takes the measurement of the relations between the time and the flow of
acoustic wave’s transmission in flowing medium as the principle. Generally speaking,
it is believed that acoustic wave’s actual transmission speed in fluid is constituted of
acoustic wave’s transmission speed (cf) under the stationary state of the medium, and
the component of fluid’s axial average flow rate (vm) in the direction of acoustic
transmission.
4.2 Structural Form
4.2.1 Composition
Flowmeter is mainly constituted of meter body, ultrasonic transducer and its installation
parts, signal processing unit, and (or) flow computer. In terms of on-site wetted
ultrasonic meters and clamp-on ultrasonic meters, pipelines where transducer is
installed may be used as meter body. The transducer of wetted ultrasonic meters
directly contacts the fluid being measured, while the transducer of clamp-on ultrasonic
meters is tightly installed on the external wall of pipelines.
4.2.2 Form
4.2.2.1 In accordance with the installation mode of transducer, flowmeter may be
divided into two forms, namely, wetted and clamp-on.
5 Requirements of Metrological Performance
5.1 Grade of Accuracy
Table 1 provides recommended accuracy grade series. If a grade of accuracy that is
not listed in this table is adopted, the maximum allowable error needs to comply with
corresponding principles in Table 1 and needs to be clearly indicated in flowmeter
product instruction and flowmeter nameplate.
5.2 Repeatability
Repeatability of flowmeter shall not exceed 1/5 of the absolute value of the maximum
allowable error stipulated by the corresponding grade of accuracy.
5.3 Flowmeter Factor Adjustment
If meter factor is changed during verification, then, the verification certificate shall
clearly indicate the previous meter factor, the meter factor after the current adjustment
and the amount of meter factor adjustment.
6 General Technical Requirements
6.1 Product Documents
6.1.1 Flowmeter shall be accompanied by an instruction for use.
6.1.2 In terms of clamp-on ultrasonic meters, the instruction for use shall describes
flowmeter’s installation methods and operating requirements in details.
6.2 Nameplate and Marking
6.2.1 Flowmeter shall have marking of flow direction.
6.2.3 Each pair of ultrasonic transducers shall have permanent uniqueness marking
and installation marking in obvious positions.
6.2.4 When transducer’s signal cable needs to make one-to-one correspondence with
ultrasonic transducer, there shall be permanent uniqueness marking and installation
marking in obvious positions.
6.3 Appearance
6.3.1 Newly manufactured flowmeter shall have satisfying surface treatment; there
shall be no phenomena like burrs, scratches, cracks, corrosion, mildew stains or
stripping of coating. The sealed surface shall be flat; there shall be no damages.
6.5 Air-tightness
Verify the medium under the maximum experimental pressure, maintain for 5 min,
there shall be no leakage in the various ports of the flowmeter body.
7 Control of Measuring Instrument
The control of measuring instrument includes type evaluation, initial verification,
subsequent verification and in-use inspection. Appendix A stipulates the test conditions,
items and methods of type evaluation. Appendix B stipulates the special requirements
of on-site verification. Appendix C stipulates the test conditions, items and methods of
in-use inspection.
7.1 Verification Conditions
7.1.1 Requirements of flow calibration device
7.1.1.5 When the pressure of fluid that flows through the flowmeter needs to be
measured, directly take pressure from pressure ports on the flowmeter body. If there
are no pressure ports on the flowmeter body, it shall, according to the requirements of
the flowmeter, determine the measurement location of pressure.
7.1.2 Fluid for verification
7.1.2.1 Universal conditions
7.1.2.3 Gas used for verification
7.1.4 Installation conditions
7.1.4.1 The installation of flowmeter shall comply with the requirements in Appendix D.
7.1.4.2 During verification, in principle, all the components that constitute flowmeter
shall be submitted for verification.
7.1.5 Each measurement time shall be not less than the allowed shortest measurement
time of the device and the flowmeter being verified.
7.1.6 When the pulse output of the flowmeter being verified is adopted for verification,
the pulse count recorded in one verification shall not be less than 10 times of the
reciprocal of the absolute value of the maximum allowed error.
7.1.7 All the electrical apparatus used for verification shall be grounded in the same
point.
7.2 Verification Items and Verification Methods
7.2.1 Verification items
Verification items of the initial verification, subsequent verification and in-use
inspection are listed in Table 2.
7.3 Processing of Verification Result
Flowmeters that are qualified in the verification shall receive a verification certificate.
The requirements of the content of the verification certificate are shown in Appendix E.
Flowmeters that are disqualified in the verification shall receive a verification result
notification, which shall indicate the disqualified items. Flowmeters that receive in-use
inspection shall receive an inspection report.
7.4 Verification Cycle
Generally speaking, verification cycle shall not exceed 2 years. In terms of plug-in
flowmeter, if the flowmeter has self-diagnostic functions and can retain alarm records,
verification may be conducted once in every 6 years and in-use inspection shall be
conducted on the site every year.
NATIONAL METROLOGY TECHINICAL SPECIFICATION
Ultrasonic Flowmeters
Issued on. AUGUST 21, 2007
Implemented on. NOVEMBER 21, 2007
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine
This Regulation was approved by General Administration of Quality Supervision,
Inspection and Quarantine on August 21, 2007, and shall be implemented since
November 21, 2007.
Jurisdiction organization.
National Flow and Capacity Measurement Technical Committee
Main drafting organizations.
National Institute of Metrology, China
Natural Gas Chengdu Branch, National Crude Oil Large Flowrate Measurement
Station
Participating drafting organizations.
National Water Large Flowrate Measurement Station
Tianjin Institute of Metrological Supervision and Testing
Daniel Measurement and Control Department of Emerson Process Management
Co., Ltd.
Beijing CHANGMIN Tech Co., Ltd.
Beijing WEIYEYUANGUAN Science & Trade Co., Ltd.
Shenzhen JIANHENG Industrial Automation System Co., Ltd.
Tangshan HUIZHONG Instrument Co., Ltd.
National Flow and Capacity Measurement Technical Committee is entrusted for
interpretation of this Regulation.
Replacing “Ultrasonic Flow”
part in JJG 198-1994
Verification Regulation of Ultrasonic
Flowmeters
Main drafters of this Regulation.
Wang, Chi (National Institute of Metrology, China)
Qiu, Fengchun (Natural Gas Chengdu Branch, National Crude Oil Large Flowrate
Measurement Station)
Participating drafters.
Miao, Yusheng (National Water Large Flowrate Measurement Station)
Chen, Xing (Tianjin Institute of Metrological Supervision and Testing)
Wang, Shuishan (Daniel Measurement and Control Department of Emerson
Process Management Co., Ltd.)
Pu, Qihuan (Beijing CHANGMIN Tech Co., Ltd.)
Shi, Lei (Beijing WEIYEYUANGUAN Science & Trade Co., Ltd.)
Xiao, Cong (Shenzhen JIANHENG Industrial Automation System Co., Ltd.)
Zhang, Lixin (Tangshan HUIZHONG Instrument Co., Ltd.)
Table of Contents
1 Scope... 5
2 References... 5
3 Terms and Definitions... 6
4 Overview... 8
5 Requirements of Metrological Performance... 10
6 General Technical Requirements... 11
7 Control of Measuring Instrument... 12
Appendix A Type Evaluation of Ultrasonic Flowmeter... 22
Appendix B Special Requirements of On-site Verification... 33
Appendix C In-use Inspection... 35
Appendix D Installation Requirements of Ultrasonic Flowmeter... 42
Appendix E Format of Verification Certificate (inner page)... 45
Verification Regulation of Ultrasonic Flowmeters
1 Scope
This Regulation is applicable to the type evaluation, initial verification, subsequent
verification and in-use inspection of ultrasonic flowmeters for closed pipes (hereinafter
referred to as flowmeters), which takes time difference method as the principle.
This Regulation is not applicable to the verification of ultrasonic flow measuring
instrument in open channels and closed conduits.
2 References
Through reference, the clauses included in the following standards and regulations
become the clauses of this Regulation.
JJF 1001-1998 General Terms in Metrology and Their Definitions
JJF 1004-2004 Metrological Terms and Their Definitions for Flow Rate
GB 3836 Electrical Apparatus for Explosive Gas Atmospheres
GB/T 18604-2001 Measurement of Natural Gas Flow by Ultrasonic Flow Meter
GB 17820-1999 Natural Gas
GB 50251-2003 Code for Design of Gas Transmission Pipeline Engineering
GB/T 13609-1999 Natural Gas - Sampling Guidelines
GB/T 13610-2003 Analysis of Natural Gas by Gas Chromatography
GB/T 17747.2-1999 Natural Gas - Calculation of Compression Factor - Part 2.
Calculation Using Molar - Composition Analysis
ISO 17089.2004 (CD) Measurement of Fluid Flow in Closed Conduits - Ultrasonic
Meters for Gas; Meters for Fiscal and Allocation Measurement
3 Terms and Definitions
3.1 Ultrasonic Flowmeter
Ultrasonic flowmeter refers to a flowmeter which utilizes the transmission characteristic
of ultrasonic wave in fluid to measure flow.
3.6 Acoustic Path
Acoustic path refers to the actual path of ultrasonic signal’s transmission among paired
ultrasonic transducers.
3.7 Transmission Angle
Transmission angle refers to the included angle between acoustic path and pipeline’s
axes.
3.8 Single-path Meter
Single-path meter refers to a flowmeter that merely has one pair of transducers.
3.9 Dual-paths Meter
Dual-paths meter refers to a flowmeter that has two pairs of transducers.
3.15 Signal Processing Unit
Signal processing unit is constituted of electronic components and microprocessor
system. It is a part of flowmeter.
3.16 Transition Flowrate (qt)
Transition flowrate refers to a flow value between the maximum flow and the minimum
flow. It segments the range of flow into two zones with different allowable errors,
namely, “high zone” and “low zone”.
4 Overview
4.1 Operating Principle
Flowmeter takes the measurement of the relations between the time and the flow of
acoustic wave’s transmission in flowing medium as the principle. Generally speaking,
it is believed that acoustic wave’s actual transmission speed in fluid is constituted of
acoustic wave’s transmission speed (cf) under the stationary state of the medium, and
the component of fluid’s axial average flow rate (vm) in the direction of acoustic
transmission.
4.2 Structural Form
4.2.1 Composition
Flowmeter is mainly constituted of meter body, ultrasonic transducer and its installation
parts, signal processing unit, and (or) flow computer. In terms of on-site wetted
ultrasonic meters and clamp-on ultrasonic meters, pipelines where transducer is
installed may be used as meter body. The transducer of wetted ultrasonic meters
directly contacts the fluid being measured, while the transducer of clamp-on ultrasonic
meters is tightly installed on the external wall of pipelines.
4.2.2 Form
4.2.2.1 In accordance with the installation mode of transducer, flowmeter may be
divided into two forms, namely, wetted and clamp-on.
5 Requirements of Metrological Performance
5.1 Grade of Accuracy
Table 1 provides recommended accuracy grade series. If a grade of accuracy that is
not listed in this table is adopted, the maximum allowable error needs to comply with
corresponding principles in Table 1 and needs to be clearly indicated in flowmeter
product instruction and flowmeter nameplate.
5.2 Repeatability
Repeatability of flowmeter shall not exceed 1/5 of the absolute value of the maximum
allowable error stipulated by the corresponding grade of accuracy.
5.3 Flowmeter Factor Adjustment
If meter factor is changed during verification, then, the verification certificate shall
clearly indicate the previous meter factor, the meter factor after the current adjustment
and the amount of meter factor adjustment.
6 General Technical Requirements
6.1 Product Documents
6.1.1 Flowmeter shall be accompanied by an instruction for use.
6.1.2 In terms of clamp-on ultrasonic meters, the instruction for use shall describes
flowmeter’s installation methods and operating requirements in details.
6.2 Nameplate and Marking
6.2.1 Flowmeter shall have marking of flow direction.
6.2.3 Each pair of ultrasonic transducers shall have permanent uniqueness marking
and installation marking in obvious positions.
6.2.4 When transducer’s signal cable needs to make one-to-one correspondence with
ultrasonic transducer, there shall be permanent uniqueness marking and installation
marking in obvious positions.
6.3 Appearance
6.3.1 Newly manufactured flowmeter shall have satisfying surface treatment; there
shall be no phenomena like burrs, scratches, cracks, corrosion, mildew stains or
stripping of coating. The sealed surface shall be flat; there shall be no damages.
6.5 Air-tightness
Verify the medium under the maximum experimental pressure, maintain for 5 min,
there shall be no leakage in the various ports of the flowmeter body.
7 Control of Measuring Instrument
The control of measuring instrument includes type evaluation, initial verification,
subsequent verification and in-use inspection. Appendix A stipulates the test conditions,
items and methods of type evaluation. Appendix B stipulates the special requirements
of on-site verification. Appendix C stipulates the test conditions, items and methods of
in-use inspection.
7.1 Verification Conditions
7.1.1 Requirements of flow calibration device
7.1.1.5 When the pressure of fluid that flows through the flowmeter needs to be
measured, directly take pressure from pressure ports on the flowmeter body. If there
are no pressure ports on the flowmeter body, it shall, according to the requirements of
the flowmeter, determine the measurement location of pressure.
7.1.2 Fluid for verification
7.1.2.1 Universal conditions
7.1.2.3 Gas used for verification
7.1.4 Installation conditions
7.1.4.1 The installation of flowmeter shall comply with the requirements in Appendix D.
7.1.4.2 During verification, in principle, all the components that constitute flowmeter
shall be submitted for verification.
7.1.5 Each measurement time shall be not less than the allowed shortest measurement
time of the device and the flowmeter being verified.
7.1.6 When the pulse output of the flowmeter being verified is adopted for verification,
the pulse count recorded in one verification shall not be less than 10 times of the
reciprocal of the absolute value of the maximum allowed error.
7.1.7 All the electrical apparatus used for verification shall be grounded in the same
point.
7.2 Verification Items and Verification Methods
7.2.1 Verification items
Verification items of the initial verification, subsequent verification and in-use
inspection are listed in Table 2.
7.3 Processing of Verification Result
Flowmeters that are qualified in the verification shall receive a verification certificate.
The requirements of the content of the verification certificate are shown in Appendix E.
Flowmeters that are disqualified in the verification shall receive a verification result
notification, which shall indicate the disqualified items. Flowmeters that receive in-use
inspection shall receive an inspection report.
7.4 Verification Cycle
Generally speaking, verification cycle shall not exceed 2 years. In terms of plug-in
flowmeter, if the flowmeter has self-diagnostic functions and can retain alarm records,
verification may be conducted once in every 6 years and in-use inspection shall be
conducted on the site every year.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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