1、Petroleum and Liquid PetroleumProductsCalibration of HorizontalCylindrical TanksPart 1: Manual MethodsANSI/API MPMS CHAPTER 2.2EFIRST EDITION, APRIL 2004REAFFIRMED, AUGUST 2014 ERRATA, NOVEMBER 2009ISO 12917-1: 2002 (Identical), Petroleum and liquid petroleum productsCalibration of horizontal cylind
2、rical tanksPart 1: Manual methodsDate of Issue: November 11, 2009 Affected Publication: API MPMS Chapter 2.2E, Petroleum and Liquid Petroleum ProductsCalibration of Horizontal Cylindrical Tanks, Part 1: Manual Methods, First Edition, April 2004 ERRATA Page 8, Clause 15 At the end of the first senten
3、ce, replace “can be neglected” with “can be neglected if E/D is less than 0,012”. At the end of the paragraph, replace “normative annex A” with “Annex A”. Page 14, Figure A.1: Replace items 1 and 2 in the key with the following: Key Value of H/D: 0,5 to 0,999 subtract volume correction when the tank
4、 is more than half full Value of H/D: 0,001 to 0,5 add volume correction when the tank is less than half fullSpecial Notes API publications necessarily address problems of a general nature. With respect to particular circumstances, local, state, and federal laws and regulations should be reviewed. A
5、PI is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations under local, state, or federal laws. Information concerni
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13、d engineering judgment regarding when and where these standards should be utilized. The formulation and publication of API standards is not intended in any way to inhibit anyone from using any other practices. Any manufacturer marking equipment or materials in conformance with the marking requiremen
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16、e API ForewordAPI publications may be used by anyone desiring to do so. Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them; however, the Institute makes no representation, warranty, or guarantee in connection with this publication and her
17、eby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal, state, or municipal regulation with which this publication may conflict. Suggested revisions are invited and should be submitted to API, Standards department, 1220 L
18、 Street, NW, Washington, DC 20005, standardsapi.org. API MPMS 2.2E / ISO 12917-1ii Contents Page API Foreword . ii Foreword . iv Introduction iv 1 Scope . 1 2 Normative references 1 3 Terms and definitions 1 4 Precautions . 2 4.1 General 2 4.2 Internal method 2 4.3 External method . 2 5 Equipment .
19、2 5.1 Equipment as used in the ISO 7507 series 2 5.2 Telescopic rod 2 6 General requirements 2 7 Calibration procedures 3 8 External measurements 3 8.1 Introduction 3 8.2 General 3 8.3 Repetition of measurements . 4 8.4 Tolerances 4 8.5 Other measurements on tank-shell plates 4 9 Internal measuremen
20、ts 5 9.1 General 5 9.2 Repetition of measurements . 5 9.3 Tolerances 5 9.4 Other measurements on tank-shell plates 5 10 Additional measurements . 6 10.1 Deadwood . 6 10.2 Measurement of tilt 6 11 Other parameters . 7 12 Recalibration 7 13 Descriptive data . 7 14 Computation of tank capacity tables G
21、eneral rules 7 15 Effects of tilt . 8 16 Systematic calculations (summary) . 8 16.1 General 8 16.2 Cylindrical volume . 8 16.3 Volume of the knuckle-dish ends . 9 16.4 Elliptical ends . 11 16.5 Spherical head 11 16.6 Deadwood 12 Annex A (normative) Tilt 13 Annex B (informative) Corrections of volume
22、 of tank table . 15 Bibliography . 18 API MPMS 2.2E / ISO 12917-1iii ISO 12917-1:2002(E)iv ISO 2002 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Sta
23、ndards 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 liaison with ISO, also
24、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 3. The main task of technical committees
25、 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 drawn to the possibi
26、lity that some of the elements of this part of ISO 12917 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12917-1 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants, Subcommittee SC 3, Static petro
27、leum measurement. ISO 12917 consists of the following parts, under the general title Petroleum and liquid petroleum products Calibration of horizontal cylindrical tanks: Part 1: Manual methods Part 2: Internal electro-optical distance-ranging method Annex A forms a normative part of this part of ISO
28、 12917. Annex B is for information only. This corrected version of ISO 12917-1:2002 incorporates the following corrections. On the cover page, “Premire dition” has been replaced by “First edition”. The missing Greek symbols have been added in the following equations: page 9, subclause 16.3, four equ
29、ations; page 10, subclause 16.3, equation immediately above Figure 4; pages 15 and 16, clause B.2, six equations. API MPMS 2.2E / ISO 12917-1ivISO 12917-1:2002(E) ISO 2002 All rights reserved vIntroduction This International Standard forms part of a series on tank calibration methods. In countries w
30、here some or all of the items covered by this part of ISO 12917 are subject to mandatory regulations, the regulations have to be observed. In cases where differences exist between this part of ISO 12917 and regulations, precedence is given to the latter. API MPMS 2.2E / ISO 12917-1 v INTERNATIONAL S
31、TANDARD ISO 12917-1:2002(E) ISO 2002 All rights reserved 1Petroleum and liquid petroleum products Calibration of horizontal cylindrical tanks Part 1: Manual methods 1 Scope This part of ISO 12917 specifies manual methods for the calibration of nominally horizontal cylindrical tanks, installed at a f
32、ixed location. It is applicable to horizontal tanks up to 4 m in diameter and 30 m in length. The methods are applicable to insulated and non-insulated tanks, either when they are above-ground or underground. The methods are applicable to pressurized tanks, and to both knuckle-dish-end and flat-end
33、cylindrical tanks as well as elliptical and spherical head tanks. This part of ISO 12917 is applicable to tanks inclined by up to 10 % from the horizontal provided a correction is applied for the measured tilt. For tanks over and above these dimensions and angle of tilt, appropriate corrections for
34、tilt and appropriate volume computations should be based on the “Coats” equation 1. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 12917. For dated references, subsequent amendments to, or r
35、evisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 12917 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normati
36、ve document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1998 (all parts), Petroleum industry Terminology ISO 7507 (all parts), Petroleum and liquid petroleum products Calibration of vertical cylindrical tanks 3 Terms and definitions
37、For the purposes of this part of ISO 12917, the terms and definitions given in ISO 1998, ISO 7507-1 and the following apply. 3.1 telescopic rod extendable tubular measuring device to measure a distance between two points NOTE For example, to measure the internal diameter of a cylindrical tank. API M
38、PMS 2.2E / ISO 12917-1 1 ISO 12917-1:2002(E) 2 ISO 2002 All rights reserved4 Precautions 4.1 General The general and safety precautions given in ISO 7507-1 shall apply to this part of ISO 12917. 4.2 Internal method Before a tank which has been used is entered, a safe-entry certificate, issued in acc
39、ordance with local or national regulations, shall be obtained. All lines entering the tank shall be disconnected and blanked. The national or local regulations regarding entry into tanks which have contained leaded fuels shall be meticulously observed. 4.3 External method National or local regulatio
40、ns regarding entry to the tank area shall be observed. 5 Equipment 5.1 Equipment as used in the ISO 7507 series The equipment required to carry out the calibration is dependent on the method to be employed. This part of ISO 12917 uses techniques and equipment described in ISO 7507-1. Equipment used
41、in the calibration of horizontal tanks shall conform with the specifications laid down in the relevant parts of ISO 7507. All equipment shall be traceable to a reference standard. 5.2 Telescopic rod 5.2.1 In addition to the equipment mentioned in 5.1, a telescopic rod shall be used. This telescopic
42、rod shall have a scale capable of being read to 1 mm, and shall be calibrated to within 0,5 mm. 5.2.2 The telescopic rod shall give a repeatability of maximum 1 mm. 6 General requirements 6.1 The tank shall be filled to its normal working capacity and working pressure at least once and allowed to st
43、and while full for at least 24 h prior to emptying and preparing the tank for calibration. NOTE The hydrostatic test applied to new or repaired tanks will satisfy this requirement when additional pressure tests are carried out. 6.2 The following variables shall be considered for the development of t
44、he capacity tables: slope/tilt; deadwood; temperature; pressure; liquid head; position of gauge point. API MPMS 2.2E / ISO 12917-1 2 ISO 12917-1:2002(E) ISO 2002 All rights reserved 37 Calibration procedures The calibration procedures for calibration of horizontal cylindrical tanks are described in
45、clause 8 (external measurements) and clause 9 (internal measurements). For both methods, measurements will be taken at around 20 % and 80 % of the width of each ring (see Figure 1). Key 1 Weld line 2 Course length 3 Circumference measurement 4 Reference height Figure 1 Measurements of the diameters/
46、circumferences 8 External measurements 8.1 Introduction External measurements may be executed with any depth of liquid and liquid pressure in the tank. The depth, temperature, density and pressure of the liquid at the time of calibration shall be recorded. However, if the temperature of the tank wal
47、l could differ by more than 10 C between the empty part and full part of the tank whilst the measurements are being taken, the tank shall be either completely full or empty during the procedure. 8.2 General For the measurement procedures, a circumferential tape of sufficient length to completely encircle the tank should be used and measurements of the total circumference shall be taken. a) In all cases, the tape to be used should be applied to the tank surface at the prescribed locat
