1、Petroleum products Determination of the filterability of lubricating oilsPart 2: Procedure for dry oilsBS ISO 133572:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017Petroleum products Determination of the filterability of lubricating oils Part 2: Procedu
2、re for dry oilsProduits ptroliers Dtermination de la filtrabilit des huiles lubrifiantes Partie 2: Mthode pour les huiles non pollues par de leauINTERNATIONAL STANDARDISO13357-2Third edition2017-05Reference numberISO 13357-2:2017(E)National forewordThis British Standard is the UK implementation of I
3、SO 133572:2017. It supersedes BS ISO 133572:2005 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee MCE/18/-/16, Hydraulic fluids.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not p
4、urport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 88673 7ICS 75.100Compliance with a British Standard cannot confer immunity from legal obligati
5、ons.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 133572:2017 ISO 2017Petroleum products Determination of the filterability of lubricating o
6、ils Part 2: Procedure for dry oilsProduits ptroliers Dtermination de la filtrabilit des huiles lubrifiantes Partie 2: Mthode pour les huiles non pollues par de leauINTERNATIONAL STANDARDISO13357-2Third edition2017-05Reference numberISO 13357-2:2017(E)BS ISO 133572:2017ISO 13357-2:2017(E)ii ISO 2017
7、All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the inte
8、rnet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyr
9、ightiso.orgwww.iso.orgBS ISO 133572:2017ISO 13357-2:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, e
10、lectronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Ver
11、nier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgISO 13357-2:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Reagents and materials . 26 Apparatus . 37 Samples and sampling 58 Preparation of appa
12、ratus 59 Procedure. 510 Calculations 710.1 Stage I filterability 710.2 Stage II filterability 711 Expression of results 812 Precision . 812.1 General . 812.2 Determinability 812.3 Repeatability . 812.4 Reproducibility . 913 Test report . 9Annex A (informative) Suitable procedure for the addition of
13、graduations to a measuring cylinder .10Bibliography .12 ISO 2017 All rights reserved iiiContents PageBS ISO 133572:2017ISO 13357-2:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
14、 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 liais
15、on with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Direc
16、tives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that
17、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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent decl
18、arations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as informatio
19、n about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.The committee responsible for this document is ISO/TC 28, Petroleum products and related products of synthetic or biological orig
20、in.This third edition cancels and replaces the second edition (ISO 13357-2:2005), of which it constitutes a minor revision including alternative membranes in order to enable the continued use of this document.A list of all parts in the ISO 13357 series can be found on the ISO website.iv ISO 2017 All
21、 rights reservedBS ISO 133572:2017ISO 13357-2:2017(E)ForewordISO (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. Ea
22、ch 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 take part in the work. ISO collaborates closely with the Internatio
23、nal Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different
24、 types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall
25、not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents).Any trade name used in this document i
26、s information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Techni
27、cal Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.The committee responsible for this document is ISO/TC 28, Petroleum products and related products of synthetic or biological origin.This third edition cancels and replaces the second edition (ISO 13357-2:2005), of
28、which it constitutes a minor revision including alternative membranes in order to enable the continued use of this document.A list of all parts in the ISO 13357 series can be found on the ISO website.iv ISO 2017 All rights reserved ISO 13357-2:2017(E)IntroductionThe fluid in a hydraulic system acts
29、as a lubricant, and to minimize wear of the components, it is important to reduce the concentrations of circulating hard contaminant particles. This is particularly necessary when the performance of the system depends on the maintenance of small clearances and orifices. Removal of these contaminants
30、 is effected by the use of filters, and the ability of a hydraulic fluid to pass through fine filters, without plugging them, is called its “filterability”. This document describes a laboratory test procedure for assessing the filterability of mineral oils in a dry state. Filterability so determined
31、 is not a physical characteristic of the oil, but represents an estimation of its behaviour in service.This document describes two measurements, referred to as “stages”. The Stage I determination is based on a comparison of the mean flow rate of a fluid through a test membrane with its initial flow
32、rate. Oils having good Stage I filterability, but only a poor Stage II performance (see below), would be unlikely to give performance problems in use, unless extremely fine system filters are utilized.The Stage II determination is based upon the ratio between the initial flow rate of fluid through t
33、he test membrane and the rate at the end of the test. It is considered that this part of the procedure is a more severe test, and is more sensitive to the presence of gels and fine silts in the oil. Silts and gels may be present in an oil when it is produced, or could be formed as an oil ages, espec
34、ially when hot. An oil with good Stage II filterability would be unlikely to give filtration problems even in the most extreme conditions, and with fine (less than 5 m) filtration present. It would thus be suitable for use in more critical hydraulic and lubrication systems.The procedure has been eva
35、luated with mineral oils up to ISO viscosity grade 100. There would appear to be no practical reason why it should not be used with oils of higher viscosity grades, but the data obtained could not be claimed to be completely in accordance with this method. Similarly, it should be possible to extend
36、the test procedure to fluids other than mineral oils. However, some fluids, e.g. fire-resistant fluids, will not be compatible with the specified test membranes, and the test could only be used for comparison purposes even when suitable membranes, with similar pore size/pore density characteristics
37、to those specified in this procedure, have been identified. ISO 2017 All rights reserved vBS ISO 133572:2017BS ISO 133572:2017Petroleum products Determination of the filterability of lubricating oils Part 2: Procedure for dry oilsWARNING The use of this document can involve hazardous materials, oper
38、ations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.1 Scop
39、eThis document specifies a procedure for the evaluation of the filterability of dry lubricating oils, particularly those designed for hydraulic applications. The procedure only applies to mineral-based oils, since fluids manufactured from other materials (e.g. fire-resistant fluids) might not be com
40、patible with the specified test membranes. The range of application has been evaluated with oils of viscosity up to ISO viscosity grade (VG) 100, as defined in ISO 3448. Within the range described, the filterability as defined is not dependent on the viscosity of the oil. The procedure is not suitab
41、le for some hydraulic oils on which specific properties have been conferred by the use of insoluble/partially soluble additives, or by particularly large molecular species.NOTE Filterability is a prime requirement for lubricating oils used in hydraulic systems because of the fine filters used in thi
42、s application.This document defines a method for assessing the filterability of dry oils. It is necessary to note that some oils exhibit poorer filterability characteristics in the presence of contaminating water. ISO 13357-12applies to the investigation of the effect of water and high temperature o
43、n filterability, if an oil is used in applications where the presence of water in the oil is likely.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edit
44、ion cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 1219-1, Fluid power systems and components Graphical symbols and circuit diagrams Part 1: Graphical symbols for conventional use and data-processing applicationsISO 3170, P
45、etroleum liquids Manual samplingISO 3448, Industrial liquid lubricants ISO viscosity classificationISO 3696, Water for analytical laboratory use Specification and test methodsISO 4788, Laboratory glassware Graduated measuring cylinders3 Terms and definitionsFor the purposes of this document, the fol
46、lowing terms and definitions apply.INTERNATIONAL STANDARD ISO 13357-2:2017(E) ISO 2017 All rights reserved 1BS ISO 133572:2017ISO 13357-2:2017(E)ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electro
47、pedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1filterabilitydimensionless number, expressed as a percentage, between volumes (Stage I) or flow rates (Stage II) at specified intervals in the test procedure3.2stage I filterabilityratio, expressed as a percentage
48、, between 240 ml and the volume of oil actually filtered in the time that 240 ml would have theoretically taken, assuming no plugging of the membrane3.3stage II filterabilityratio, expressed as a percentage, between the flow rate near the start of the filtration, and the flow rate between 200 ml and
49、 300 ml of filtered volume4 PrincipleThe test fluid is filtered under specified conditions through a membrane of 0,8 m mean pore diameter and the times for the specified filtrate volumes are recorded. Filterabilities are calculated from ratios of the filtration rate near the start of filtration to the filtration rate at specified higher filtered volumes. The result of the test is the average of three determined values.NOTE In the ideal situation, the filtration rate remains constant.5 Reage
