EN 23015:1994

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Mineralölerzeugnisse - Bestimmung des Cloudpoints (ISO 3015:1992)Produits pétroliers - Détermination du point de trouble (ISO 3015:1992)Petroleum products - Determination of cloud point (ISO 3015:1992)75.080Naftni proizvodi na splošnoPetroleum products in generalICS:Ta slovenski standard je istoveten z:EN 23015:1994SIST EN 23015:1998en01-maj-1998SIST EN 23015:1998SLOVENSKI
STANDARD
INTERNATIONAL STANDARD Second edition 1992-08-l 5 Petroleum products - Determination of cloud point Produits p6troliers - LMtermination du point de trouble _- --- .- --- .--- -y----- 7- Reference number IS0 3015:1992(E) SIST EN 23015:1998

IS0 3015:1992(E) Foreword IS0 (the International. Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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. IS0 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 Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 3015 was prepared by Technical Committee ISO/TC 28, Petroleum products and Lubricants. This second edition cancels and replaces the first edition (IS0 3015:1974), of which it constitutes a technical revision. 0 IS0 1992 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 l CH-1211 Genkve 20 l Switzerland Printed in Switzerland ii SIST EN 23015:1998

Petroleum products - Determination of cloud point WARNING - The use of this International Standard may involve hazardous materials, operations and equipment. This standard does not purport to address all 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 and determine the applicability of regulatory limitations prior to use. 1 Scope This International Standard specifies a method for the determination of the cloud point of petroleum products which are transparent in layers 40 mm in thickness and have a cloud point below 49 *C. 2 Definition For the purposes of this International Standard, the following definition applies. 2.1 cloud point: The temperature at which a cloud of wax crystals first appears in a liquid when it is cooled under specified conditions. 3 Principle A sample is cooled at a specified rate and examined periodically. The temperature at which a cloud is first observed at the bottom of the test jar is re- corded as the cloud point. 4 Apparatus (see figure 1) 4.1 Test jar, cylindrical, of clear glass, flat- bottomed, 33,2 mm to 34,8 mm in outside diameter and 115 mm to 125 mm in height. The inside diameter of the jar may range from 30 mm to 32,4 mm, within the constraint that the wall thickness be no greater than I,6 mm. The jar shall be marked with a line to indicate a sample height L 54 mm + 3 mm above the inside bottom. - 4.2 Thermometers, partial-immersion type, con- forming to the specifications in table 1. 4.3 Cork, to fit the test jar, bored centrally to take the test thermometer. 4.4 Jacket, watertight, cylindrical, metal, flat- bottomed, about 115 mm in depth, with an inside di- ameter of 44,2 mm to 45,8 mm. It shall be supported in a vertical position in a cooling bath (4.7) so that not more than 25 mm projects out of the cooling medium, and it shall be capable of being cleaned. 4.5 Disc, of cork or felt, 6 mm in thickness, to fit loosely inside the jacket. 4.6 Gasket, ring form, about 5 mm in thickness, to fit snugly on the outside of the test jar and loosely inside the jacket. This gasket may be made of rubber, leather or other suitable material, elastic enough to cling to the test jar and hard enough to hold its shape. The purpose of the ring gasket is to prevent the test jar from touching the jacket. SIST EN 23015:1998

IS0 3015:1992(E) Dimensions in millimetres Thermometers fork Coolant 1 Test Jar Jacket - Gasket - 7 cb Int. 458 Q, int, 44,2 (b ext. 34,B Q) ext. 33,2 _ w @ int. 32,4 Q, Int. 30,Q DISC t Cooling bath Figure 1 - Apparatus for cloud-point test SIST EN 23015:1998

IS0 3015:1992(E) Table 1 - Specifications of thermometers Specification Range Immersion length Graduation at each Longer lines at each Figured at each Scale error not to exceed Expansion chamber: heating permitted to Overall length Stem diameter Bulb length Bulb diameter Distance to line at from bottom of bulb Length of scale High cloud and pour - 38 “C to -+- 50 *c 108 mm 1 “C 5 *c 10 “C 0,5 *c 100 "C 230 mm zfi 5 mm 6mmto 8 mm 7,0 mm to IO mm 5,5 mm min, but not greater than stem diam- eter - 38 *C : 120 mm to 130 mm 65 mm to 85 mm Low cloud arid pour - 80 “C to + 20 “C 76 mm 1 "C 5 *c IO "C 1 “C down to - 33 *c, 2 *C below - 33 “C 60 OC 230 mm + 5 mm 6 mm to 8 mm 7,0 mm to 10 mm 5,O mm min, but not greater than stem diam- eter - 70 *c : 100 mm to 120 mm 70 mm to 100 mm NOTE - The emergent-stem tetnperature is 21 *C throughout the scale range. 4.7 Cooling baths, of a type suitable for obtaining the required temperatures. The size and shape of the baths are not specified, but a support to hold the jackets firmly in a vertical position is essential. The bath temperature shall be monitored by means of a high or low cloud and pour thermometer immersed to the correct immersion depth. For the determination of cloud points below IO OC, two or more baths are needed. The required bath temperatures m;iy be maintained by refrigeration
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