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JJG 640-2016 English PDF

US$919.00 · In stock
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JJG 640-2016: Differential Pressure Flowmeters
Status: Valid

JJG 640: Evolution and historical versions

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	PDF
JJG 640-2016	English	919	Add to Cart	5 days [Need to translate]	Differential Pressure Flowmeters	Valid	JJG 640-2016
JJG 640-1994	English	RFQ	ASK	3 days [Need to translate]	Verification Regulation of Differential Pressure Type Flowmeter	Obsolete	JJG 640-1994

PDF similar to JJG 640-2016

Standard similar to JJG 640-2016

GB/T 36126 JJG 646 GB/T 1885 JJG 648 JJG 649 JJG 638

Basic data

Standard ID	JJG 640-2016 (JJG640-2016)
Description (Translated English)	Differential Pressure Flowmeters
Sector / Industry	Metrology & Measurement Industry Standard
Classification of Chinese Standard	A53
Word Count Estimation	40,431
Date of Issue	2016-11-30
Date of Implementation	2017-05-30
Older Standard (superseded by this standard)	JJG 640-1994
Regulation (derived from)	State Administration of Quality Supervision, Inspection and Quarantine Notice No.119 of 2016
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine

JJG 640-2016: Differential Pressure Flowmeters

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Differential Pressure Flowmeters National Metrological Verification Regulation of the People's Republic of China Differential pressure flowmeter 2016-11-30 release 2017-05-30 implementation State Administration of Quality Supervision, Inspection and Quarantine issued Differential pressure flow meter verification procedures Replacing JJG 640-1994 Responsible Unit. National Traffic Capacity Measurement Technical Committee The main drafting unit. China Institute of Metrology Participated in the drafting unit. Tianjin Runtai Automation Instrumentation Co., Ltd. Beijing Bo Sida New Century Measurement and Control Technology Co., Ltd Liaoning Institute of Metrology Dalian Sony Electronics Co., Ltd. Shanghai Branch Yang Technology Co., Ltd This procedure entrusts the National Flow Capacity Measurement Technical Committee to explain The main drafters of this procedure. Shi Zhendong (China Institute of Metrology) Duan Huiming (China Institute of Metrology) Participate in the drafters. Tong Fu Lai (Tianjin Runtai Automation Instrumentation Co., Ltd.) Zhang Zhili (Beijing Bo Sida New Century Measurement and Control Technology Co., Ltd.) Wang Zhen (Liaoning Institute of Metrology) Pang Shiqiang (Dalian Sony Electronics Co., Ltd.) Zhou (Shanghai Ke Yang Technology Co., Ltd.)

Introduction (II) 1 Scope (1) 2 References (1) 3 Terms and definitions (2) 3.1 Terminology (2) 3.2 Units of measurement and symbols (3) 4 Overview (4) 4.1 Working principle (4) 4.2 Composition (4) 4.3 Classification (4) 4.4 Use (4) 5 Metrological performance requirements (5) 5.1 Geometric test method Measurement performance requirements (5) 5.2 coefficient test method measurement performance requirements (5) 5.3 indication error measurement method measurement performance requirements (5) 6 General technical requirements (6) 6.1 Random files (6) 6.2 Identification and nameplate (6) 6.3 Appearance (6) 7 Metering device control (6) 7.1 Geometry Detection (7) 7.2 coefficient detection method (12) 7.3 Indication error detection method (14) 7.4 Processing of Verification Results (15) 7.5 Verification cycle (16) Appendix A Geometrical test method of measurement performance requirements (17) Appendix B Outflow Coefficient Calculation Formula (31) Appendix C Certificate of Verification and Verification Results Page Format (33)

Introduction

This procedure is according to JJF1002-2010 "national measurement procedures for the preparation of rules", according to JJF1004 "flow Metrological terminology and definition ", combined with China's differential pressure flow meter technology and the status quo to amend. This procedure and JJG 640-1994 "differential pressure flowmeter" compared to the main changes are as follows. - According to JJF1002-2010 "national measurement procedures for the preparation of rules" requirements, to determine the structure of the program, Added an introduction to a reference file; --- provides the differential pressure flow meter of the three test methods. In the original geometric detection method, the basis of coefficient detection method , The new value of the error detection method; --- According to GB 2624-2006 relative GB 2624-1993 changes, the new version of the geometric detection method The diameter ratio of the standard throttle, the outflow coefficient and its uncertainty, the upper part of the throat of the upper part of the throat is required. Have changed --- clear the accuracy level of 0.5, 1, 1.5, 2, 2.5; - In accordance with JJF1002-2010 "National Metrological Verification Rules for the preparation of rules" requirements, in Appendix C to Out of the three test methods of the certificate/certificate results within the notice page format. Prerequisites of this Code Release. --- JJG 640-1994. Differential pressure flow meter verification procedures

1 Scope

This procedure applies to the integration of differential pressure flowmeter and split differential pressure flow meter standard throttle and differential pressure device Of the first test, follow-up test and use of the inspection.

2 reference file

This procedure refers to the following documents. JJG 882 pressure transmitter JJG 1003 flow totalizer Standard Terminology and Definitions for JJF1001-2011 Flow meter noun terms and definitions GB/T 2624.1-2006 Measurement of full flow of fluid with differential pressure devices installed in circular cross-section pipes Part 1. General principles and requirements GB/T 2624.2-2006 Measurement of full pipe flow with differential pressure devices installed in circular cross-section pipes 2 parts. orifice plate GB/T 2624.3-2006 Measurement of full pipe flow with differential pressure devices installed in circular cross-section pipes 3 parts. nozzle and venturi nozzle GB/T 2624.4-2006 Measurement of full pipe flow with differential pressure devices installed in circular cross-section pipes 4 parts. Venturi tube ISO 5167-1..2003 Measurement of full flow of fluid with a differential pressure device installed in a circular cross-section pipe. Section. General principles and requirements (Measurementoffluidflowbymeansofpressuredifferentialde- vicesinsertedincircularcross-sectionconduitsrunningful-Part 1. Generalprinciples andrequirements) ISO 5167-2..2003 Measurement of full pipe fluid flow with differential pressure devices installed in circular cross-section pipes. Partial. Orifice Plate (Measurementoffluidflow by means ofpressuredifferentialdevices insertedincircularcross-sectionconduitsrunningful-Part 2. Orificeplates) ISO 5167-3..2003 Measurement of full-pipe fluid flow with differential pressure devices installed in circular cross-section pipes. Part. nozzle and venturi nozzle (Measurementoffluidflowbymeansofpressuredifferential devicesinsertedincircularcross-sectionconduitsrunningful-Part 3. NozzlesandVen- turinozzles ISO 5167-4..2003 Measurement of full pipe flow with differential pressure devices installed in circular cross-section pipes. Part. Venturi tube (Measurementoffluidflowbymeansofpressuredifferentialdevices insertedincircularcross-sectionconduitsrunningful-Part 4. Venturitubes) For dated references, only the dated edition applies to this rule; references that are not dated , The latest version (including all amendments) applies to this procedure.

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