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GB/T 9248-2008: Methods of evaluating the performance of flowmeters for incompressible fluids
Status: Valid GB/T 9248: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 9248-2008 | English | 419 |
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Methods of evaluating the performance of flowmeters for incompressible fluids
| Valid |
GB/T 9248-2008
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| GB/T 9248-1988 | English | 639 |
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Methods of evaluating the performance of flowmeters for incompressidle fluids
| Obsolete |
GB/T 9248-1988
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PDF similar to GB/T 9248-2008
Basic data | Standard ID | GB/T 9248-2008 (GB/T9248-2008) | | Description (Translated English) | Methods of evaluating the performance of flowmeters for incompressible fluids | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | N12 | | Classification of International Standard | 17.120.10 | | Word Count Estimation | 18,149 | | Date of Issue | 2008-07-28 | | Date of Implementation | 2009-02-01 | | Older Standard (superseded by this standard) | GB/T 9248-1988 | | Quoted Standard | GB/T 17212-1998; GB/T 17611-1998; GB/T 18271.2-2000 | | Regulation (derived from) | Announcement of Newly Approved National Standards No. 12 of 2008 (No. 125 overall) | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This standard specifies the performance of incompressible fluid flow meter performance evaluation methods and test results representation. This standard applies to closed conduits measuring single-phase incompressible fluid flow. Special operating conditions using the meter, in addition to meeting the requirements of this standard, we must also comply with other relevant standards requirements. Certain provisions of this standard test items or requirements may apply to certain types of flowmeters, and some types of flowmeters and may need to increase pilot projects or other requirements, so the pilot project different varieties according to meter, type, structure principle, etc. according to the provisions of the relevant product standard additions and deletions. | GB/T 9248-2008: Methods of evaluating the performance of flowmeters for incompressible fluids---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.
Methods of evaluating the performance of flowmeters for incompressible fluids
ICS 17.120.10
N12
National Standards of People's Republic of China
Replacing GB/T 9248-1988
Incompressible fluid flow meter performance evaluation method
Posted 2008-07-28
2009-02-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
1 Scope 1
2 Normative references 1
3 Terms and definitions
4 Basic Performance Test 2
4.1 Test equipment requirements 2
4.2 meter installation requirements 2
4.3 Test fluid to claim 3
4.4 Test conditions Requirement 3
4.5 basic error and repeatability 4
5 affect the amount of test 6
Representation of the general provisions of 5.1 and test the effects of influence quantities 6
5.2 Test Project 7
6 13 Other tests
6.1 Pressure loss 13
6.2 starting flow 13
6.3 electrical output signal ripple content 13
6.4 Insulation resistance 13
6.5 Dielectric Strength 13
13 6.6 Energy Consumption
13 6.7 Accelerated Life Test
6.8 Step Response 13
7 Assessment Report 13
Foreword
The revised standard and replaces GB/T 9248-1988 "incompressible fluid flow meter performance evaluation method."
This standard and GB/T 9248-1988 the main differences are as follows.
--- In accordance with the provisions of GB/T 1.1-2000 of the full text of the editorial changes;
--- Update normative references;
--- Supply pressure tolerance from the "nominal value ± 1%" to "nominal value ± 3%", oil content from "not more than 1ppm" to "not
Greater than 10mg/m3 ", the amount of dust from the" dust particles less than 3μm "to" not more than 0.1g/m
3, small dust particle diameter
To 3μm ";
--- According to standard test method has been modified.
The standard proposed by China Machinery Industry Federation.
The standard measurement and control of industrial processes by the National Standardization Technical Committee at its first Technical Committee (SAC/TC124/SC1)
Centralized.
This standard is drafted by. Shanghai Institute of Industrial Automation Instrumentation.
Participated in the drafting of this standard. Shanghai Automation Instrumentation System Inspection and Testing Institute.
The main drafters of this standard. Cai Wen-chi, Li Minghua.
This standard replaces the standards previously issued as follows.
--- GB/T 9248-1988.
Incompressible fluid flow meter performance evaluation method
1 Scope
This standard specifies the representation of incompressible flow meter performance evaluation methods and performance test results in fluid flow meter.
This standard applies to closed conduits measuring single-phase incompressible fluid flow meter.
Meter used under special working conditions, in addition to meeting the requirements of this standard, it should also comply with the other provisions of the relevant standards
Claim.
Some test items specified in this standard or requirement may not apply to certain types of meter, and some type of meter can be
The need to increase energy pilot projects or other requirements, according to the meter so the test project different variety, type, and other structures in accordance with relevant principles
Product standard additions or deletions.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent
Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research
Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 17212-1998 industrial process measurement and control - Terms and definitions (idt IEC 60902. 1987)
GB/T 17611-1998 closed conduits of fluid flow measurement terminology and symbols (idt ISO 4006.1991)
GB/T 18271.2-2000 Process measurement and control devices - General methods and procedures for evaluating performance - Part 2. under reference conditions
Test (idt IEC 61298-2.1995)
3 Terms and Definitions
The following terms and definitions GB/T 17212 and GB/T 17611 apply to this standard established.
3.1
Within a short time interval to flow through the pipe cross-section of the quotient of the amount of fluid time interval. The time interval should be short enough so that you can
Considered to be within the flow of time is a steady stream.
3.2
Over a period of time the total amount of the fluid flowing through the pipe cross-section. It is numerically equal to the flow of time points.
3.3
Measurement of fluid flow in closed conduits or the total amount of the instrument. Usually it consists of primary and secondary device component unit.
3.4
The flow rate of fluid through the measuring pipe, pressure, density and temperature and other various parameters do not change over time, so as not to affect the desired measurement
The accuracy of the flow.
NOTE. The observed steady flow, in fact, close to the average of these parameters in a time-independent and small changes with time, the flow of which is in fact "(EC
Meter) average steady flow. "
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