JJG 1030-2007 English PDF

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JJG 1030-2007: Verification Regulation of Ultrasonic Flowmeters
JJG 1030-2007
NATIONAL METROLOGY TECHINICAL SPECIFICATION
OF THE PEOPLE’S REPUBLIC OF CHINA
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 and 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 and 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
ISO/TR 12765: 1997 Measurement of Fluid Flow in Closed Conduits - Methods Using
Transit Time Ultrasonic Flowmeters
AGA Report-1992 No.8 Compressibility Factors of Natural Gas and Other Related
Hydrocarbon Gases
AGA Report No.9-1998 Measurement of Gas by Multipath Ultrasonic Meters
AGA Report No.10-2003 Speed of Sound in Natural Gas and Other Related
Hydrocarbon Gases
ANSI/API MPMS 5.8-2004 Measurement of Liquid Hydrocarbons by Ultrasonic Flow
Meters Using Transit Time Technology
Please make sure to adopt the currently valid version of the above-mentioned
references.
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.
3.2 Ultrasonic Transducer
Ultrasonic transducer refers to a device which can generate acoustic output under the
effect of electric signal and transduce acoustic signal to electric signal.
3.3 Wetted Ultrasonic Meters
Wetted ultrasonic meters refers to flowmeters which embed transducer into fluid
pipelines; allow the transducer to directly contact the fluid.
3.4 Clamp-on Ultrasonic Meters
Clamp-on ultrasonic meters refers to flowmeters which fixate transducer outside fluid
pipelines; whose acoustic wave transmission path penetrates through the wall of fluid
pipelines.
3.5 Transit Time
Transit time refers to the time of ultrasonic signal’s transmission in the fluid medium
part.
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.
3.10 Multiple-paths Meter
Multiple-paths meter refers to a flowmeter that has above two pairs of transducers.
3.11 Meter Body
Meter body refers to a pipe section which is adopted for the installation of components
like ultrasonic transducer; can comply with the stipulations of relevant standards in all
the aspects after going through special manufacture.
3.12 Zero-flow Reading
Zero-flow reading refers to flowmeter’s maximum flowrate reading when the medium
is under a stationary state.
3.13 Pulse Factor
Pulse factor refers to pulse count sent out by a flowmeter when a unit volume of fluid
flows through the flowmeter. Generally speaking, it is also known as K factor, which
shall be expressed in symbol K.
3.14 Flow Conditioner
Flow conditioner refers to a component that can reduce vortex and improve the
distribution of speed.
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”.
3.17 Meter Factor
Meter factor refers to a factor that is used to correct the value indicated by flowmeter
in accordance with the result of actual flow verification of the flowmeter. The value is
the ratio of the value indicated by the standard to the value indicated by flowmeter.
Generally speaking, it is expressed in symbol F.
4 Overview
4.1 Operating Princi...