ISO INTERNATIONAL STANDARD 9030 First edition 1990-12-15 Crude petroleum --- Determination of water and sediment -- Centrifuge method Pétrole brut --- Determination de la teneur en eau et en sediments - Methode par centrifugation Reference number ISO 9030:1990(E) Not for Resale ISO 9030:1990(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member 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, govern- mental 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 Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Interna- tional Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard iso 9030 was prepared by Technicai Committee ISO/Tc 28, Petroleum products and lubricants. Annexes A and B form an integral part of this International Standard. C 1SO1990 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland ii Not for Resale ted without license from IHS INTERNATIONAL STANDARD ISO 9030:1990(E) Crude petroleum --- Determination of water and sediment Centrifuge method WARNING --- The use of this International Standard may involve hazardous materiais, operations and equipment. This standard does not purport to address ali of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices isO 5272:1979, Toluene for industrial use - Specifi- Scope 1 cations This International Standard specifies a method for IsO 9029:1990. Crude petroleum -- Determination of the laboratory determination of water and sediment water -- Distillation method. in crude oils by means of a centrifuge procedure The precision data have only been determined for water contents up to 1 % (V/V). Significance 3 It has been observed that centrifugal methods NOTE 1 A knowledge of the water content of crude oil is im- of determination of water and sediment may, in many portant in the refining. purchase. sale and transfer cases, give erroneous results. This is especially so when use of a high-speed mixer has been employed to obtain of products a representative sample. The method is therefore not en- tirelysatisfactory andthe amount ofwaterdeterminedis is used to correct the volume involved in the custody almost always lowerthan the actual water content transfer of oil. Normative references 2 Principle 4 The following standards contain provisions which Equal volumes of crude oil and water-saturated through reference in this text, constitute provisions toluene are placed in a cone-shaped centrifuge tube. ofthisInternationalStandard.Atthetimeofpubli- After centrifugation, the volume of the higher-density cation, the editions indicated were valid. All stan. water and sediment layer at the bottom of the tube dards subject to revision, and parties to are is read. agreements based on this International Standard are encouraged to investigate the possibility of ap- plying the most recent editions of the standards in- Apparatus 5 dicated below. Members of IEC and ISO maintain registers of currently valid International Standards. Usual laboratory apparatus, together with the fol- lowing: ISO 3170:1988, Petroleum liquids Manual s