BS-7813-1995 ISO-4124-1994.pdf
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1、BRITISH STANDARD BS 7813:1995 ISO 4124:1994 Guide for Statistical control of dynamic liquid hydrocarbon volumetric metering systems Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:55:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7813:1995 This British Stan
2、dard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 June 1995 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference PTI/12 Draf
3、t for comment 88/52423 DC ISBN 0 580 24139 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PTI/12, Petroleum measurement and sampling, upon which the following bodies were represented: Department of Trade and Industry (
4、National Engineering Laboratory) Department of Trade and Industry (Oil and Gas Office) Institute of Petroleum Salvage Association The following body was also represented in the drafting of the standard, through subcommittees and panels: GAMBICA (BEAMA Ltd.) Amendments issued since publication Amd. N
5、o.DateComments Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:55:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7813:1995 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordiii Section 1. General 1.1Scope1 1.2Definitions1
6、1.3Symbols and units1 1.4Central proving2 1.5On-line proving2 Section 2. Statistical measurements 2.1Principles of statistical measurement3 2.2Measurement procedure6 Section 3. Central proving 3.1Collection of data9 3.2Reliability of data collected and resulting values10 3.3Performance charts11 3.4C
7、ontrol charts and tests18 3.5Worked examples21 Section 4. On-line proving 4.1Collection of data45 4.2Reliability of data collected47 4.3Performance charts47 4.4Control charts48 4.5Worked examples52 Section 5. Secondary control 5.1Comparison between meter and tank63 Annex A (informative) Statistical
8、tables67 Annex B (informative) t-distribution values for 95 % and 99 % probability (two-sided)70 Annex C (informative) Normal (Gaussian) distribution71 Annex D (informative) Outlier tests73 Annex E (informative) Random uncertainty of polynomial approximation75 Annex F (informative) Bibliography75 Fi
9、gure 1 Performance chart: K-factor versus flowrate showing scatter (range) of 5 to 10 consecutive runs8 Figure 2 Control chart (general)8 Figure 3 Performance chart No. 113 Figure 4 Performance chart No. 214 Figure 5 Performance chart No. 3, E = f (Q)14 Figure 6 Performance chart No. 4 UCC polynomia
10、l15 Figure 7 Control chart No. 119 Figure 8 Control chart No. 219 Figure 9 Control chart No. 320 Figure 10 Control chart No. 420 Figure 11 Double chronometer method of pulse interpolation24 Figure 12 Performance chart, turbine No. 310, 197828 Figure 13 Log (Q/v) vs. meter factor, turbine No. 310, 19
11、7829 Figure 14 Performance chart, turbine No. 310, 197933 Figure 15 Log (Q/v) vs. meter factor, turbine No. 310, 197934 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:55:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7813:1995 ii BSI 09-1999 Page Figure 16
12、 Performance chart, turbine No. 310, 198038 Figure 17 Log (Q/v) vs. meter factor, turbine No. 310, 198039 Figure 18 Comparison of 1978 data with 1979 data, log (Q/v) vs. meter factor, turbine No. 31043 Figure 19 Comparison of 1979 data with 1980 data, log (Q/v) vs. meter factor, turbine No. 31044 Fi
13、gure 20 Permissable change in flowrate during proving46 Figure 21 Performance chart from series of on-line provings48 Figure 22 K-factor (mean of 5 or 10 consecutive runs) versus time49 Figure 23 Combined performance/control chart51 Figure 24 Moving-average meter factor versus time52 Figure 25 Contr
14、ol chart for meter operating within linear range56 Figure 26 Chart A Meter performance curves Meter turbine proved with pipe prover59 Figure 27 Control chart Meter operating outside linear range61 Figure C.1 Frequency histogram72 Figure C.2 Bell-shaped distribution curve72 Table 1 Performance chart
15、No. 5 Direct matrix16 Table 2 Performance chart No. 617 Table 3 Example 5: test results for turbine meter25 Table 4 Performance chart, meter No. 310 test report, 197830 Table 5 Meter factor for turbine meter No. 310, 197831 Table 6 Random uncertainty of polynomial for turbine No. 310, 197832 Table 7
16、 Performance chart, meter No. 310 test report, 197935 Table 8 Meter factor for turbine meter No. 310, 197936 Table 9 Random uncertainty of polynomial for turbine No. 310, 197937 Table 10 Performance chart, meter No. 310 test report, 198040 Table 11 Meter factor for turbine meter No. 310, 198041 Tabl
17、e 12 Random uncertainty of polynomial for turbine No. 310, 198042 Table 13 Example 4 Normalizing meter factor58 Table 14 Computed uncertainty for vertical cylindrical tanks at 15 C65 Table 15 Computed meter uncertainty at 15 C65 Table 16 Combined values of transfer uncertainty for tank and meter66 T
18、able A.1 Distribution of the range67 Table A.2 Limiting values E2 (n, ), P = 0,9568 Table A.3 Limiting values E2 (n, ), P = 0,9969 Table B.1 t-distribution values70 Table D.1 For use with Dixons Test for outliers73 Table D.2 For use with Grubbs Test for outliers74 List of referencesInside back cover
19、 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:55:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7813:1995 BSI 09-1999iii National foreword This British Standard has been prepared by Technical Committee PTI/12. It is identical with ISO 4124:1994, Liquid h
20、ydrocarbons Dynamic measurement Statistical control of volumetric metering systems, published by the International Organization for Standardization (ISO). ISO 4214 was prepared by Subcommittee 2, Dynamic petroleum measurement, of Technical Committee, Petroleum products and lubricants, in which the U
21、nited Kingdom participated. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-referen
22、ces International StandardCorresponding British Standard BS 6866 Proving systems for meters used in dynamic measurement of liquid hydrocarbons ISO 7278-3:1986Part 3:1987 Methods for pulse interpolation (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i
23、 to iv, pages 1 to 76, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: London South Bank University, London South Bank Universi
24、ty, Fri Dec 08 13:55:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 13:55:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7813:1995 BSI 09-19991 Section 1. General 1.1 Scope In dynamic measuring systems th
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