1、BRITISH STANDARD BS EN ISO 8222:2002 Incorporating Corrigendum No. 1 Petroleum measurement systems Calibration Temperature corrections for use when calibrating volumetric proving tanks The European Standard EN ISO 8222:2002 has the status of a British Standard ICS 75.180.30 BS EN ISO 8222:2002 This
2、British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 22 November 2002 BSI 29 January 2003 ISBN 0 580 40786 1 National foreword This British S
3、tandard is the official English language version of EN ISO 8222:2002. It is identical with ISO 8222:2002. It supersedes BS EN ISO 8222:1996 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee PTI/12, Petroleum measurement and sampling, to Subcommittee PTI
4、/12/1, Static and dynamic petroleum measurement, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this do
5、cument may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contrac
6、t. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for
7、change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages
8、 1 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments 14315 Corrigendum No.1 29 January 2003 Replacing EN ISO foreword pageEUROPEANSTANDARD NORMEEUROPEN
9、NE EUROPISCHENORM ENISO8222 November2002 ICS75.180.30 SupersedesENISO8222:1995 Englishversion PetroleummeasurementsystemsCalibrationTemperature correctionsforusewhencalibratingvolumetricprovingtanks (ISO8222:2002) SystmesdemesureduptroleEtalonnageCorrections detempratureutiliserlorsdeltalonnagedesja
10、uges talons(ISO8222:2002) MesssystemefrMinerallerzeugnisseKalibrierung TemperaturkorrekturenzurAnwendungaufvolumetrische Bezugsmessbehlter(ISO8222:2002) ThisEuropeanStandardwasapprovedbyCENon9October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgi
11、vingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninany
12、otherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,
13、Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnational
14、Members. Ref.No.ENISO8222:2002ECORRECTED20021218 Foreword Thisdocument(ENISO8222:2002)hasbeenpreparedbyTechnicalCommitteeISO/TC28 “Petroleumproductsandlubricants“incollaborationwithTechnicalCommitteeCEN/TC19 “Petroleumproducts,lubricantsandrelatedproducts“,thesecretariatofwhichisheldbyNEN. ThisEurop
15、eanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement,atthelatestbyMay2003,andconflictingnationalstandards shallbewithdrawnatthelatestbyMay2003. ThisdocumentsupersedesENISO8222:1995. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardso
16、rganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg, Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnitedKingdom. Endorsementnotice ThetextofISO8222:2002has
17、beenapprovedbyCENasENISO8222:2002withoutany modifications. ENISO8222:2002INTERNATIONAL STANDARD ISO 8222 Second edition 2002-11-01 Reference number ISO 8222:2002(E) Petroleum measurement systems Calibration Temperature corrections for use when calibrating volumetric proving tanks Systmes de mesure d
18、u ptrole talonnage Corrections de temprature utiliser lors de ltalonnage des jauges talonsENISO8222:2002ENISO8222:2002iiISO 2282002:2)E( ISO 2002 r llAithgs reservde iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO memb
19、er bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, government
20、al and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Direct
21、ives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elem
22、ents of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO8222 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants, Subcommittee SC 3, Static petrole
23、um measurement. This second edition cancels and replaces the first edition (ISO 8222:1987), which has been technically revised. This revision includes an equation for calculation of the density of water in the range 1,0 C to 40 C derived from density determinations on water carried out at the CSIRO
24、National Measurement Laboratory, Australia, and published in 1994. It is expressed in terms of the International Temperature Scale of 1990, ITS-90. The equation in ISO 8222:1987 was based on work published in 1971 by PTB, Germany, expressed in terms of the International Practical Temperature Scale o
25、f 1968, IPTS-68. Annex A forms a normative part of this International Standard. Annex B is for information only. ENISO8222:2002iiiISO :2228(2002)E vi ISO 2002 Ar llithgr seresvde Introduction When meter proving tanks or other containers are calibrated with a primary measure using water, correction f
26、actors are required to make allowance for the effects of temperature during the calibration on the volume of water that is transferred and on the capacities of the primary measure and container. The corrections take account of differences in the volume of water, and of the capacities of the measure
27、and the tank, arising from the following temperature-related effects. a) The change in volume of the calibrating liquid (water) caused by any change in its temperature from the time it is measured in the measure to the time when the total volume has been transferred to or drawn from the tank being c
28、alibrated. NOTE Although this International Standard is applicable to volumes transferred to, or drawn from, a tank, it has been written in terms of the volume transferred to the tank. b) Changes in the capacities of the measure and the tank being calibrated caused by any differences between the tem
29、peratures of their shells and their standard reference (calibration) temperature(s). ENISO8222:2002ivANRETNIITOTS LANDNADRA ISO 2282002:2)E( ISO 2002 r llAithgs reservde 1 Petroleum measurement systems Calibration Temperature corrections for use when calibrating volumetric proving tanks 1 Scope This
30、 International Standard specifies multiplication factors for the correction of the volume of water transferred from a primary measure to a tank for changes arising from temperature differences during the determination of the capacity of the tank at reference temperature. NOTE This International Stan
31、dard does not set out a calibration procedure nor consider the uncertainties in temperature measurement, for which reference should be made to other standards. Equations are given in annex A for the determination of the density of air-free and air-saturated, pure water in the temperature range to fo
32、r temperatures expressed in terms of the ITS-90 International Temperature Scale. A calculation routine is also provided in annex B for the combined water and metal correction factor that is applied when determining the capacity of the tank at reference temperature. 2 Symbols and definitions For the
33、purposes of this International Standard, the symbols defined in Table 1 apply. 3 Temperatures 3.1 The corrections apply for temperatures in the range to . For practical reasons, the temperature difference between the temperature of the measure and that of the tank shall not exceed . Table 1 Symbols
34、Symbol Quantity Unit Combined correction factor 1 Correction factor for expansion of the calibrating liquid (water) over the temperature range to where 1 Standard reference temperature of the measure Standard reference temperature of the tank being calibrated Temperature of the water in the measure
35、and of its shell Temperature of the water in the tank being calibrated at the completion of the calibration and of the shell of the tank Cubical expansion coefficient of the shell of the measure Cubical expansion coefficient of the shell of the tank being calibrated Density of water at temperature D
36、ensity of water at temperature 1,0 C4 0 C C c C tdw t 1 t 2 C tdw = 1 2 t sm C t st C t 1 C t 2 C V 1 C 1 V 2 C 1 1 t 1 kg/m 3 2 t 2 kg/m 3 1,0 C4 0 C 5,0 C ENISO8222:20021ISO :2228(2002)E 2 ISO 2002 Ar llithgr seresvde NOTE Larger temperature differences between measure and tank may indicate temper
37、ature gradients within the tank that would result in errors in its calibration. 3.2 Because of the difficulty of accurately measuring the temperatures of the shell of the measure and the shell of the tank being calibrated, the following assumptions shall be made. a) The measure is at the same temper
38、ature as the liquid it contains when the volume of the particular increment (pour) is measured. b) The tank being calibrated is at the same temperature as the liquid it contains when the total volume of liquid has been transferred. 3.3 The standard reference temperature ( ) for petroleum measurement
39、 is generally 2 . If the measure has been calibrated at , the tank calibration will generally be at the same reference temperature. However, the calculation routine covers the circumstance where the reference temperatures of the measure and of the tank being calibrated may differ. If this Internatio
40、nal Standard is applied for one of the other reference temperatures used in some countries, i.e. or , the values entered for or shall be and respectively. If the values of and have been recorded in degrees Fahrenheit, they shall be converted to degrees Celsius, to the nearest . 4 Coefficient of expa
41、nsion 4.1 Expansion of shells In the computation of the corrections, the values of the coefficients of cubical expansion for the metals of the shells of the measure ( ) and the tank being calibrated ( ) shall be used if they are known. These coefficients shall be reported with the other details of t
42、he calibration. If the value for the particular steel is not known, the following values may be used and reported as part of the calibration: mild steel: stainless steel: NOTE Values for the coefficient of cubical expansion of stainless steel depend upon its composition. Values have been reported ov
43、er the range to . In this International Standard, the value has been adopted for consistency with ISO 4269 1 . 4.2 Expansion of water The expansion of the water, , expressed as the “water correction factor” is the ratio of the densities of water at temperature in the measure and at the temperature i
44、n the tank being calibrated. Values of and shall be obtained from the equation given in annex A. Calculate the water correction factor to 6 decimal places. t s 15 C 15 C 20 C 60 F t sm t st 20 C 15,56 C t 1 t 2 0,01 C V 1 V 2 33 10 6 C 1 51 10 6 C 1 43 10 6 C 1 54 10 6 C 1 51 10 6 C 1 C tdw t 1 t 2
45、C tdw = 1 2 1 2 ENISO8222:20022ISO 2282002:2)E( ISO 2002 r llAithgs reservde 3 5 Basis of the computation of the corrections 5.1 Determination of the change in the volume of the measure or the tank Express the corrections as multiplication factors: a) for the measure: ; b) for the tank: . 5.2 Combin
46、ed correction factor The combined correction factor, , for both the contraction or expansion of the water and that of the shells of the measure and the tank is given by the equation: 5.3 Calculation routine A calculation routine giving the recommended calculation sequence to use is given in annex B.
47、 6 Reporting and use of correction The combined correction factor, , which is dimensionless, shall be rounded to six decimal places before use. Report the value of the correction factor together with the following information: a) reference to this International Standard, i.e. ISO 8222; b) material of construction of the shell of the measure; c) value of ; d) material of construction of the shell of the tank; e) value of ; f) standard reference temperature for the measure; g) standard reference temperature for the tank. The correction shall be used in the form of a mu
