Standard No.:	JJG 1030-2007
English Name:	Verification Regulation of Ultrasonic Flowmeters
Chinese Name:	超声流量计检定规程
Chinese Classification:	A53    Mechanics Measurement
Professional Classification:	JJ    Metering
Issued by:	AQSIQ
Issued on:	2007-8-21
Implemented on:	2007-11-21
Status:	valid
Superseding:	JJG 198-1994 Verification Regulation of Velocity Flow Meter
Language:	English
File Format:	PDF
Word Count:	13500 words
Price(USD):	140.0
Delivery:	via email in 1 business day

1 Scope This regulation is applicable to the type evaluation, initial verification, subsequent verification and in-service inspection of ultrasonic flowmeter (hereinafter referred to as flowmeter) for closed pipeline follows the principle of time difference method. This regulation is not applicable to the verification of flowmeter measuring the flow in open or covered channel. 2 Reference Documents The following standards and regulations contain provisions which, through reference in this text, constitute provisions 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 Meters 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 - 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 Hydrocar-bon Gases ANSI/API MPMS 5.8-2004 Measurement of Liquid Hydrocarbons by Ultrasonic Flowmeters Using Transit Time Technology Editions of such documents which are applied shall be those currently in effect. 3 Terminologies and Definitions 3.1 Ultrasonic flowmeter

1 Scope 2 Reference Documents 3 Terminologies and Definitions 4 General 4.1 Operating Principle 4.2 Structure Type 5 Metrological Performance Requirements 5.1 Accuracy Grade 5.2 Repeatability 5.3 Meter Factor Adjustment 5.4 Requirements of Bi-direction Measurement Flowmeter 5.5 Requirements of Clamp-on Meter 6 General Technical Requirements 6.1 Random Documents 6.2 Nameplate and Marking 6.3 Appearance 6.4 Protective Function 6.5 Tightness 7 Measuring Instrument Control 7.1 Verification Condition 7.2 Test Item and Test Method 7.3 Verification Result Treatment 7.4 Verification Period Appendix A Type Evaluation of Ultrasonic Flowmeter Appendix B Special Requirements for Site Verification Appendix C In-service Inspection Appendix D Installation Requirements of Ultrasonic Flowmeter Appendix E Verification Certificate (Inside Page) Format