1、 Reference number ISO 4020:2001(E) ISO 2001INTERNATIONAL STANDARD ISO 4020 First edition 2001-12-15 Road vehicles Fuel filters for diesel engines Test methods Vhicules routiers Filtres combustible pour moteurs diesels Mthodes dessai ISO 4020:2001(E) PDF disclaimer This PDF file may contain embedded
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4、optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2001 All rights reserved. Unless otherwise specified
5、, 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 either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case p
6、ostale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland ii ISO 2001 All rights reservedISO 4020:2001(E) ISO 2001 All rights reserved iiiContents Page Foreword.iv 1 Scope 1 2 Normative references1 3 Terms and definitions .2
7、 4 Flow rates .4 5 Test materials.4 5.1 Test liquid.4 5.2 Test contaminants for tests to determine instantaneous filtration efficiency and filter life4 5.3 Test installation, general.5 6 Tests5 6.1 Test for cleanliness of new filters5 6.2 Fabrication integrity test.6 6.3 Test for differential pressu
8、re of new filters.6 6.4 Test for instantaneous filtration efficiency and filter life 7 6.5 Test for water separation efficiency 14 6.6 Collapse/burst test of the filter element16 6.7 Burst test of complete filters17 6.8 Pulsating pressure fatigue test 18 6.9 Vibration resistance fatigue test 20 Anne
9、x A (normative) Test liquid for fuel filter test 21 Annex B (normative) Test installations 22 Annex C (normative) Organic contaminant37 Annex D (normative) Specification for carbon black powder used for the organic contaminant concentrate 40 Annex E (normative) Supplementary details for water separa
10、tion test 42 Annex F (normative) Determination of the insoluble content 44 Annex G (normative) Diagram for showing instantaneous filtration efficiency and differential pressure versus choking time47 Bibliography48 ISO 4020:2001(E) iv ISO 2001 All rights reservedForeword ISO (the International Organi
11、zation 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 establishe
12、d 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 International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
13、International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. 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 t
14、he member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. International Standard ISO 4020 was prepared by Techni
15、cal Committee ISO/TC 22, Road vehicles, Subcommittee SC 7, Injection equipment and filters for use on road vehicles. This first edition cancels and replaces ISO 4020-1:1979, which has been technically revised. The former Part 2 has been withdrawn. Annexes A to G form a normative part of this Interna
16、tional Standard. INTERNATIONAL STANDARD ISO 4020:2001(E) ISO 2001 All rights reserved 1Road vehicles Fuel filters for diesel engines Test methods 1 Scope This International Standard specifies the types of test for fuel filters in accordance with their application. This International Standard applies
17、 to fuel filters provided for road vehicles with diesel engines and for test installations for fuel injection equipment. The test described may be used for fuel filters located either on the pressure side or on the suction side of the fuel supply pump. This International Standard is intended for fil
18、ters having a rated flow of up to 200 lh 1 . By agreement, the tests, with some modifications, may be used for filters with higher rates of flow. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this Internati
19、onal Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents in
20、dicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 565:1990, Test sieves Metal wire cloth, perforated metal plate and electroformed sheet Nominal sizes of o
21、penings ISO 760:1978, Determination of water Karl Fischer method (General method) ISO 2719: 1) , Determination of flash point Pensky-Martens closed cup method ISO 2942:1994, Hydraulic fluid power Filter elements Verification of fabrication integrity and determination of the first bubble point ISO 30
22、16:1994, Petroleum products Determination of pour point ISO 3104:1994, Petroleum products Transparent and opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity ISO 3405:2000, Petroleum products Determination of distillation characteristics at atmospheric pressure I
23、SO 3675:1998, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method 1) To be published. (Revision of ISO 2719:1988) ISO 4020:2001(E) 2 ISO 2001 All rights reservedISO 4548-7:1990, Methods of test for full-flow lubricating oil filters for internal combust
24、ion engines Part 7: Vibration fatigue test ISO 8213:1986, Chemical products for industrial use Sampling techniques Solid chemical products in the form of particles varying from powders to coarse lumps ISO 11841-1:2000, Road vehicles and internal combustion engines Filter vocabulary Part 1: Definitio
25、ns of filters and filter components ISO 11841-2:2000, Road vehicles and internal combustion engines Filter vocabulary Part 2: Definitions of characteristics of filters and their components ISO 12103-2:1997, Road vehicles Test dust for filter evaluation Part 2: Aluminium oxide test dust ASTM-D 971-99
26、a, Standard Test Method for Interfacial Tension of Oil Against Water by the Ring Method ASTM-D 2784-98, Standard Test Method for Sulfur in Liquefied Petroleum Gases (Oxy-Hydrogen Burner or Lamp) 3 Terms and definitions For the purposes of this International Standard the terms and definitions given i
27、n ISO 11841-1, ISO 11841-2 and the following apply. NOTE Pressures are indicated in kPa (instead of bar) or in Pa (instead of mbar); to obtain them in bar or mbar, divide them by 10 2 (100 kPa = 1 bar; 100 Pa = 1 mbar) 3.1 sedimentor separator in which contaminant is removed by density difference 3.
28、2 instantaneous filtration efficiency h ratio between the test contaminant retained versus that added, expressed as a percentage 12 1 100 dd d h - = where d 1is the concentration of test contaminant at filter inlet; d 2is the concentration of test contaminant at filter outlet. 3.3 filter life t or V
29、 service interval of a filter or filter element until maintenance or replacement, expressed in minutes or until final differential pressure is reached, expressed in litres 3.4 pressure difference p stat difference in static pressure between upstream and downstream of a filter, expressed in pascals I
30、SO 4020:2001(E) ISO 2001 All rights reserved 33.5 rated flow q vnormal operating flow at which liquid is passed through a filter, expressed in litres per hour or litres per minute NOTE The flow can be that specified by the manufacturer or as agreed between manufacturer and user. 3.6 contaminant, org
31、anic suspension of finely divided carbon black in test liquid, formulated to provide similar filter choking characteristics to those of normal diesel fuel 3.7 contaminant, inorganic fused aluminium oxide dust of closely controlled particle size NOTE It is the incombustible constituent that is added
32、to the organic contaminant for the purpose of revealing the instantaneous filtration efficiency property of a filter. 3.8 collapse/burst pressure of filter element p diff differential pressure at which a choked filter element suffers structural failure, expressed in kilopascals 3.9 burst pressure of
33、 complete filter p internal pressure at which the filter housing suffers structural failure, expressed in kilopascals 3.10 fabrication integrity test test to indicate quality standard of filter element by measurement of volume of air escaping through filter medium or joints in unit time, when immers
34、ed in liquid at specified depth and internal pressure NOTE The volume is measured in millilitres per minute and is given the symbol V B . 3.11 test of cleanliness test to enables the degree of cleanliness of new filters to be determined and reveal the amount of impurities flushed from the clean side
35、 of the filter under specified test conditions NOTE The amount is measured in milligrams and is given the symbol W. 3.12 test flow rate q trate at which test liquid flows through the filter during a specific test, expressed in litres per hour or litres per minute NOTE It may be different from the ra
36、ted flow q v . 3.13 undissolved water water dispersed in test liquid NOTE This means diesel fuel containing water which can be separated by physical means, e. g. by centrifuging. ISO 4020:2001(E) 4 ISO 2001 All rights reserved4 Flow rates The test flow rate shall reflect service conditions and shall
37、 be one of the following values: 10 lh 1 , 25 lh 1 , 50 lh 1 , 75 lh 1 , 100 lh 1 , 125 lh 1 , 150 lh 1 , 175 lh 1 , 200 lh 1 or as agreed between filter manufacturer and user. 5 Test materials 5.1 Test liquid The test liquid used for all tests, except the water separation test (see 6.5) and collaps
38、e/burst test of the filter element (see 6.6), shall be a straight mineral oil 2)with properties as shown in annex A. Except in tests 6.1 and 6.2, this liquid shall be used at such a temperature that the kinematic viscosity of the liquid lies between 4 mm 2 /s and 6 mm 2 /s. Alternatively, the liquid
39、 shall be blended with refined spindle oil or premium grade kerosene to give a viscosity that is between these limits at the test temperature. All test liquids shall be free from additives apart from colouring dyes. Provision shall be made to ensure that the test liquid is free from undissolved wate
40、r. The liquid for each test shall be drawn from its storage container at a point above the zone of sedimentation. Before use, and if needed, all liquids shall be passed through a highly efficient filter medium, the latter being adequately supported and suitably clamped at the edges; see the followin
41、g items from B.3 (2nd, 3rd and 4th items under Other equipment), e.g.: vacuum pump: 85 kPa below atmospheric pressure; filtration apparatus: filter paper disc holder; filter paper disc or membrane: diameter 140 mm, mean pore size between 0,4 m and 1,1 m. The differential pressure across the filter p
42、aper shall not exceed 85 kPa. Providing the test liquid is suitably cleaned, it may be reused up to a maximum of 20 times. 5.2 Test contaminants for tests to determine instantaneous filtration efficiency and filter life 5.2.1 Organic contaminant concentrate The concentrate (see note) shall consist o
43、f a dispersion in a ratio of 1 g of carbon black to a mixture of 90 ml of test liquid and 10 ml of dispersant additive. For the method of preparation, see annex C. The specification of the carbon black can be found in annex D. NOTE This concentrate is difficult to prepare and when prepared requires
44、to be tested for suitability as described in annex C. 2) Suitable products are available commercially. Details (product list) may be obtained from the Secretariat of Technical Committee ISO/TC 22 or from the ISO Central Secretariat. ISO 4020:2001(E) ISO 2001 All rights reserved 55.2.2 Inorganic cont
45、aminant The contaminant shall be fused aluminium oxide dust. The particle size distribution shall conform to grades M1 and M2 of ISO 12103-2. Normally, grade M2 dust shall be used, however, for filters manufactured from fine paper the finer M1 grade dust shall be used as an alternative contaminant.
46、5.3 Test installation, general There shall be no sudden changes in tube or hose bore throughout the test rigs. 6 Tests 6.1 Test for cleanliness of new filters 6.1.1 Purpose of the test This test shall be carried out first to ascertain whether the clean side of the filter to be tested is free from di
47、rt and of other loose particles which may result from production, storage and transport. 6.1.2 Test installation See B.1. The test liquid temperature shall be 23 C 5 C. 6.1.3 Other equipment See B.1. 6.1.4 Procedure a) Clean and dry the test sieve for 30 min in a drying cabinet at approximately 20 C
48、 above the final boiling point of the petroleum ether employed in accordance with 6.1.4 d) and allow to cool for 30 min to ambient temperature. b) Weigh the test sieve to the nearest 0,1 mg on a laboratory balance and insert the test sieve in a horizontal position in the measuring device (B.1.7). c)
49、 Pump the test liquid through the circuit for 1 h at twice the rated flow of the filter under test. d) Spray approximately 10 ml of petroleum ether through the cleaning hole on to the inner walls of the measuring device in order to wash down particles from the wall and to gather them on the sieve. e) Remove the test sieve with tweezers, place it on filter paper and allow to dry. f) Place the test sieve in a clean, dry Petri dish, cover it with a lid, dry and al
