1、BRITISH STANDARD BS ISO 7507-1:2003 Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks Part 1: Strapping method ICS 75.180.30 BS ISO 7507-1:2003 This British Standard was published under the authority of the Standards Policy and S t r a t e g y C o m m i t t e e o n 10
2、 February 2004 BSI 10 February 2004 ISBN 0 580 43388 9 National foreword This British Standard reproduces verbatim ISO 7507-1:2003 and implements it as the UK national standard. It supersedes BS 7723-1:1994 and BS 7723-6:1998 which are withdrawn. The UK participation in its preparation was entrusted
3、 by Technical Committee PTI/12, Petroleum measurement and sampling, to Subcommittee PTI/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
4、Standards which implement international publications referred to in this document 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 public
5、ation does not purport to include all the necessary provisions of a contract. 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 internationa
6、l/European committee any enquiries on the interpretation, or proposals for 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 ISO title p
7、age, pages ii to v, a blank page, pages 1 to 62, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 7507-1:2003(E)INTERNATIONAL STANDAR
8、D ISO 7507-1 Second edition 2003-12-15 Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks Part 1: Strapping method Ptrole et produits ptroliers liquides Jaugeage des rservoirs cylindriques verticaux Partie 1: Mthode par ceinturage BSISO75071:2003DPlcsid Fremia ihTs PDF
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13、ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o gro We bwww.is.o groii BSISO75071:2003I SO 3002 All irhgts seredevr iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references. 1 3 Terms and definitions. 2 4
14、Precautions 5 5 Equipment 6 6 General requirements. 7 7 Circumference measurements. 7 8 Other measurements on tank shell plates 10 9 Deadwood 10 10 Tank bottoms. 11 11 Measurement of tilt . 11 12 Floating-roof tanks 11 13 Recalibration. 12 14 Computation of tank capacity tables General rules . 12 15
15、 Form of tank capacity tables . 13 16 Computation of open capacity 13 17 Construction of final tables 17 Annex A (normative) Specification for equipment used in strapping 23 Annex B (informative) Recommendations for monitoring, checking and verification of tank calibration and capacity table 26 Anne
16、x C (informative) Tank calibration data and calculation sheet 32 Annex D (informative) Tank calibration uncertainties 36 Annex E (informative) Tank shell temperature determination . 47 Annex F (normative) Gauge tape temperature correction . 48 Annex G (informative) Expansion due to liquid head . 50
17、Annex H (normative) Expansion due to temperature . 58 Annex I (normative) Certificate of calibration 61 Bibliography . 62 BSISO75071:2003iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prepar
18、ing 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, governmental and non-governmental, in li
19、aison 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 Directives, Part 2. The main task of
20、 technical committees is to prepare International Standards. 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
21、 drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 7507-1 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricant
22、s, Subcommittee SC 3, Static petroleum measurement. This second edition cancels and replaces the first edition (ISO 7507-1:1993). It also cancels and replaces ISO 7507-6:1997, the subject of which is now included in this part of ISO 7507. ISO 7507 consists of the following parts, under the general t
23、itle Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks: Part 1: Strapping method Part 2: Optical-reference-line method Part 3: Optical-triangulation method Part 4: Internal electro-optical distance-ranging method Part 5: External electro-optical distance-ranging metho
24、d Part 6: Recommendations for monitoring, checking and verification of tank calibration and capacity table BSISO75071:2003I SO 3002 All irhgts seredevr vIntroduction This part of ISO 7507 forms part of a series on tank calibration including the following: ISO 7507-2:1993, Petroleum and liquid petrol
25、eum products Calibration of vertical cylindrical tanks Part 2: Optical-reference-line method ISO 7507-3:1993, Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks Part 3: Optical-triangulation method ISO 7507-4:1995, Petroleum and liquid petroleum products Calibration of
26、 vertical cylindrical tanks Part 4: Internal electro-optical distance-ranging method ISO 7507-5:2000, Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks Part 5: External electro-optical distance-ranging method ISO 7507-6:1997, Recommendations for monitoring, checking a
27、nd verification of tank calibration and capacity table ISO 8311:1989, Refrigerated light hydrocarbon fluids Calibration of membrane tanks and independent prismatic tanks in ships Physical measurement ISO 9091-1:1991, Refrigerated light hydrocarbon fluids Calibration of spherical tanks in ships Part
28、1: Stereo-photogrammetry ISO 9091-2:1992, Refrigerated light hydrocarbon fluids Calibration of spherical tanks in ships Part 2: Triangulation measurement The strapping method for the calibration of vertical cylindrical tanks has been used for many years and is a recognized method of determining the
29、capacity of storage tanks from measurements of the circumference of a tank at various heights. The strapping method is also often used to establish a reference circumference at a selected height to use as a datum in other methods of tank calibration. BSISO75071:2003INTENRATIONAL TSANDADR IS-7057 O1:
30、(3002E)I SO 3002 All irhgts seredevr 1Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks Part 1: Strapping method 1 Scope 1.1 This part of ISO 7507 specifies a method for the calibration of substantially vertical cylindrical tanks by measuring the tank using a strappin
31、g tape. 1.2 This method is known as the “strapping method” and is suitable for use as a working method, a reference method or a referee method. NOTE For the reference method, the number of strappings required will be specified in the standard which refers to this part of ISO 7507. 1.3 The operation
32、of strapping, the corrections to be made and the calculations leading to the compilation of the tank capacity table are described. 1.4 This method does not apply to abnormally deformed, e.g. dented or non-circular, tanks. 1.5 This method is suitable for tilted tanks with a deviation of up to 3 % fro
33、m the vertical, provided that a correction for the measured tilt is applied in the calculations. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest
34、edition of the referenced document (including any amendments) applies. ISO 91-1:1992, Petroleum measurement tables Part 1: Tables based on reference temperatures of 15 C and 60 F ISO 3675:1998, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method ISO 42
35、69:2001, Petroleum and liquid petroleum products Tank calibration by liquid measurement Incremental method using volumetric meters BSISO75071:20032 3 Terms and definitions For the purposes of this document and subsequent parts of ISO 7507, the following terms and definitions apply. 3.1 argument inde
36、pendent variable of a function NOTE A table is entered with value(s) of the independent variable(s), the value(s) extracted from the table being known as the dependent value(s). 3.2 bottom calibration procedure to determine the quantity of liquid contained in a tank below the calibration datum-point
37、 3.3 calibration process of determining the capacity of a tank, or the partial capacities corresponding to different levels 3.4 capacity total volume of a tank 3.5 capacity table tank table tank capacity table table showing the capacities of, or volumes in, a tank corresponding to various liquid lev
38、els measured from a stable reference point 3.6 course one circumferential ring of plates in a tank 3.7 calibration datum-point point used as the datum in the preparation of a calibration table NOTE Course heights and the effective levels of deadwood are measured from this point, to which the bottom
39、calibration is also related. 3.8 deadwood any tank fitting that affects the capacity of the tank NOTE Deadwood is referred to as “positive deadwood” when the capacity of the fitting increases the effective capacity of the tank, or “negative deadwood” when the volume of the fitting displaces liquid a
40、nd reduces the effective capacity. 3.9 dip innage depth of a liquid in a tank above the dipping datum-point 3.10 dip-hatch gauge-hatch opening in the top of a tank through which dipping and sampling operations are carried out BSISO75071:2003I SO 3002 All irhgts seredevr 33.11 dip-point point on the
41、dip-plate which the dip-weight touches during gauging and from which the measurements of the oil and water depths are taken NOTE The dip-point usually corresponds to the datum-point, but when this is not so, the difference in level between the datum-point and the dip-point has to be allowed for in t
42、he calibration table. 3.12 dip-plate striking-plate positioned below the dip-hatch NOTE The position of the dip-plate should not be affected by bottom or wall movements. 3.13 dip-tape graduated steel tape used for measuring the depth of the oil or water in a tank, either directly by dipping or indir
43、ectly by ullage 3.14 dip-weight weight attached to a steel dip-tape, of sufficient mass to keep the tape taut and of such shape as to facilitate the penetration of any sludge that might be present on the dip-point or the dip-plate 3.15 floating cover screen lightweight cover of either metal or plast
44、ics material designed to float on the surface of a liquid in a tank NOTE The cover rests upon the liquid surface and is used to retard evaporation of volatile products in a tank. 3.16 floating-roof tank tank in which the roof floats freely on the surface of the liquid contents, except at low levels
45、when the weight of the roof is taken through its supports by the tank bottom 3.17 function when two variable quantities are interrelated, one quantity is said to be a function of the other NOTE In the context of tank calibration, the volume of liquid contained in a tank is said to be a function of t
46、he dip or of the ullage. 3.18 gauging process of taking all the necessary measurements in a tank in order to determine the quantity of liquid that it contains 3.19 interpolation process of obtaining the value of a function corresponding to a value of the argument intermediate between those given 3.2
47、0 Littlejohn grip quick-release clamp that may be fitted around a strapping tape at any convenient position throughout its length NOTE A handle is attached to the Littlejohn grip so that the strapping tape can be pulled to the correct tension. BSISO75071:20034 3.21 open capacity calculated capacity
48、of a tank or part of a tank before any allowance has been made for deadwood 3.22 reference height vertical distance between the dip-point and the upper reference point 3.23 overall height total external height from the top of the shell to the base of the tank (plate) 3.24 referee method application
49、of the strapping method of tank calibration to give a calibration of a tank for custody transfer purposes or to provide a basis for assessing the accuracy of other methods of tank calibration 3.25 reference method application of the strapping method of tank calibration to the measurement of a reference circumference for use in other methods of tank calibration NOTE An example of such a meth
