ISO INTERNATIONAL STANDARD 12917-1 Second edition 2017-03 Petroleum and liquid petroleum products Calibration of horizontal cylindrical tanks Part 1: Manual methods Pétrole et produits pétroliers liquides - Jaugeage des réservoirs cylindriques horizontaux Partie 1: Meéthodes manuelles Reference number ISO 12917-1:2017(E) [so International Organization for Standardization @ IS0 2017 nitted without license from IHS IS0 12917-1:2017(E) COPYRIGHT PROTECTED DOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either Iso at the address below or Iso's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internatinir DrganizationforStandardization @ IS0 2017 - All rights reserved No reproduction or networking permited without license from IHS IS0 12917-1:2017(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Precautions 4.1 General .1 4.2 Internal method .2 4.3 External method .2 5 Equipment. .2 5.1 Equipment as used in IS0 7507-1 5.2 Telescopic rod. .2 5.3 Distance meter .2 5.4 Leveller 2 6 General requirements ..2 7 Calibration procedures. .3 7.1 3 General, 7.2 Measurement of circumferences External 3 7.2.1 .3 Introduction 7.2.2 General. .3 7.2.3 Repetition of measurements ..4 7.3 Measurement of circumferences Internal .5 7.3.1 Overview 5 7.3.2 General. .5 7.4 Measurements of lengths. .5 7.4.1 Method. 7.4.2 Length of horizontal cylinder .6 7.4.3 Lengths of segments .6 7.4.4 Lengths of heads 7 7.4.5 Gauge lengths ..7 7.4.6 Measurement/calculations of radii of the heads 7 7.5 Tank tilt. .7 7.6 Plate thickness. .8 7.7 Reference height .8 7.8 Deadwood 7.9 Measurements of temperature and pressure ..8 8 Re-calibration. .8 9 Descriptive data. .9 10 Computation of tank capacity table .10 10.1 General rules .10 10.2 Accuracy of volume .10 10.2.1 General.. ..10 10.2.2 Calculation parameters .10 10.2.3 Volume calculation. .13 10.3 Correctionsofvolumeoftanktable .22 10.3.1 General 22 10.3.2 Working pressure. .22 10.3.3 Tank-shell temperature .24 10.4 Deadwood .24 10.5 Calibration table at gauged levels 24 Inteainal oganzation @stS207 - All rights reserved ii d without license from IHS