1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 20783-1:2011Petroleum and related products Determination of emulsion stability of fire-resistant fluidsPart 1: Fluids in category HFAEBS EN ISO 20783-1:2011 BRITISH STA
2、NDARDNational forewordThis British Standard is the UK implementation of EN ISO20783-1:2011. It supersedes BS EN ISO 20783-1:2003, which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee MCE/18/-/6, Contamination control.A list of organizations represented on thi
3、s committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011 ISBN 978 0 580 71219 7 ICS 75.120 Compliance with a British Standard cannot confer immunity fromle
4、gal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2011. Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 20783-1 January 2011 ICS 75.120 Supersede
5、s EN ISO 20783-1:2003English Version Petroleum and related products - Determination of emulsion stability of fire-resistant fluids - Part 1: Fluids in category HFAE (ISO 20783-1:2011) Ptrole et produits connexes - Dtermination de la stabilit dmulsions de fluides difficilement inflammables - Partie 1
6、: Fluides de catgorie HFAE (ISO 20783-1:2011) Minerallerzeugnisse und verwandte Produkte - Bestimmung der Emulsionsstabilitt von schwer entflammbaren Flssigkeiten - Teil 1: HFAE-Flssigkeiten (ISO 20783-1:2011) This European Standard was approved by CEN on 10 January 2011. CEN members are bound to co
7、mply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENEL
8、EC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the
9、same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
10、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any
11、means reserved worldwide for CEN national Members. Ref. No. EN ISO 20783-1:2011: EBS EN ISO 20783-1:2011 EN ISO 20783-1:2011 (E) 3 Foreword This document (EN ISO 20783-1:2011) has been prepared by Technical Committee ISO/TC 28 “Petroleum products and lubricants“ in collaboration with Technical Commi
12、ttee CEN/TC 19 “Gaseous and liquid fuels, lubricants and related products of petroleum, synthetic and biological origin” the secretariat of which is held by NEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
13、the latest by July 2011, and conflicting national standards shall be withdrawn at the latest by July 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all
14、 such patent rights. This document supersedes EN ISO 20783-1:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, E
15、stonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 20783-1:2011 has been approved b
16、y CEN as a EN ISO 20783-1:2011 without any modification. BS EN ISO 20783-1:2011 ISO 20783-1:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle .2 5 Reagents 2 6 Apparatus.2 7 Samples and sampling3 8 Test condition
17、s 4 9 Procedure.4 10 Expression of results5 11 Precision 5 12 Test report5 Annex A (normative) Composition of test waters .6 Bibliography7 BS EN ISO 20783-1:2011 ISO 20783-1:2011(E) iv ISO 2011 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federa
18、tion 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 committ
19、ee. 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. International Standards are drafted in accordance
20、 with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires ap
21、proval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that 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. ISO 20783 was prepared by Technical Comm
22、ittee ISO/TC 28, Petroleum products and lubricants. This second edition cancels and replaces the first edition (ISO 20783-1:2003), of which it constitues a minor revision. ISO 20783 consists of the following parts, under the general title Petroleum and related products Determination of emulsion stab
23、ility of fire-resistant fluids: Part 1: Fluids in category HFAE Part 2: Fluids in category HFB BS EN ISO 20783-1:2011INTERNATIONAL STANDARD ISO 20783-1:2011(E) ISO 2011 All rights reserved 1Petroleum and related products Determination of emulsion stability of fire-resistant fluids Part 1: Fluids in
24、category HFAE WARNING The use of this part of ISO 20783 may involve hazardous materials, operations and equipment. This part of ISO 20783 does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this part of ISO 20783 to establish approp
25、riate safety and health practices and determine the applicability of regulatory limitations prior to use. 1 Scope This part of ISO 20783 specifies a test method to assess the stability of emulsions within the category HFAE, as defined in ISO 6743-4, made up with waters having clearly-defined concent
26、rations of salts. This method is applicable only to HFAE fluids and not to HFAS fluids. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition o
27、f the referenced document (including any amendments) applies. ISO 3170:2004, Petroleum liquids Manual sampling ISO 3696:1987, Water for analytical laboratory use Specification and test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 s
28、tability ability of a fluid to remain of a uniform composition and consistency for extended periods of time, without the formation of layers having compositions different to the bulk or the separation of components or ingredients 3.2 oil separation production, in the form of droplets or a continuous
29、 layer at the surface of the test sample, of a separate phase that has a distinct difference in colour, generally more or less dark yellow, and a distinct phase boundary that separates it from the bulk of the test sample 3.3 creaming production of a layer at the surface of the test sample with a whi
30、te to yellow-white colour, showing a consistency different from the rest of the sample, but not necessarily a distinct separation boundary BS EN ISO 20783-1:2011 ISO 20783-1:2011(E) 2 ISO 2011 All rights reserved4 Principle A sample of emulsifying oil is used to make up an emulsion with a standard t
31、est water with which it has been declared to be compatible by the manufacturer. The emulsion is stored for a specified period at a specified temperature. Observations of the stability of the emulsion are made at the end of the storage period. 5 Reagents 5.1 Demineralized water, meeting the requireme
32、nts of Grade 2 of ISO 3696. 5.2 Potable water, i.e. tap water, unless the mains supply is contaminated with particulate or high soluble mineral content. 5.3 Acetone (CH3COCH3), general purpose reagent (GPR). 5.4 Propan-2-ol (isopropyl alcohol) (CH3CHOHCH3), general purpose reagent (GPR). 5.5 Dishwas
33、her detergent, also called glass cleaner detergent or glass washing machine detergent. 6 Apparatus 6.1 Flasks, 150 ml or 200 ml capacity, with graduated necks (Hirschsohn flasks) as shown in Figure 1. 6.2 Cork bungs, to fit the flasks (6.1). 6.3 Oven, capable of maintaining a temperature of (70 2) C
34、 or (50 2) C. BS EN ISO 20783-1:2011 ISO 20783-1:2011(E) ISO 2011 All rights reserved 3Dimensions in millimetres Figure 1 Hirschsohn flasks 7 Samples and sampling 7.1 Unless otherwise specified, samples of emulsifying oil shall be obtained by the procedures described in ISO 3170. 7.2 Prepare 1 l of
35、emulsion using one of the standard test waters described in Annex A (normally the hardest of the waters with which the manufacturer has declared the emulsifying oil to be compatible). Use the proportion of emulsifying oil recommended by the manufacturer for normal applications. Vigorous shaking by h
36、and is usually sufficient to emulsify the oil, but reference should be made to the suppliers instructions regarding mixing. Other proportions may be used if required and by agreement with the parties concerned. BS EN ISO 20783-1:2011 ISO 20783-1:2011(E) 4 ISO 2011 All rights reserved8 Test condition
37、s On agreement between the parties concerned, one of the following two test conditions shall be chosen: a) Test condition 1: test temperature: (70 2) C test duration: 1 week b) Test condition 2 test temperature: (50 2) C test duration: 3 weeks 9 Procedure 9.1 Prepare three flasks (6.1) of either cap
38、acity. However, if there is reason to expect much separation, it is advisable to use the larger ones. Clean the flasks by washing them with dishwasher detergent (5.5) and rinsing with potable water (5.2) followed by demineralized water (5.1). Allow them to dry, by a final rinse of acetone (5.3) or p
39、ropan-2-ol (isopropyl alcohol) (5.4) followed by air drying at ambient temperature. Fill the flasks with the prepared emulsion (7.2) to approximately the middle of the graduated scale. Insert a cork bung loosely into each flask. 9.2 Adjust the temperature of the oven (6.3) to the value required by t
40、he test condition chosen. Place the stoppered flasks in the oven and maintain the oven at the temperature and for the test duration required by the chosen test condition. 9.3 Ensure that while the emulsion is being heated to the test temperature, the cork bungs are not displaced and the emulsion lev
41、el does not rise above the top graduation mark of the flasks. When the emulsion has reached the test temperature, ensure that the cork bungs are inserted tightly to prevent evaporation. 9.4 At the end of the test time and while the flasks and their contents are still hot, assess the emulsions in the
42、 test flasks visually according to the categories for oil separation and creaming given in Tables 1 and 2. Record the categories observed for each of the test flasks. 9.5 Record the presence of any water separation at the bottom of the flasks. Table 1 Oil separation (A) Category Description 1A No oi
43、l separation 2A Traces of oil (oil drops or a ring of oil) 3A Continuous film of oil (see the Note) NOTE Oil separation at the sides of the flasks is classified under category 2A. Table 2 Creaming (R) Category Description 1R No creaming 2R 1 ml of creaming BS EN ISO 20783-1:2011 ISO 20783-1:2011(E)
44、ISO 2011 All rights reserved 510 Expression of results 10.1 Express the result of the assessment of separation as the category designation for which at least two identical results were obtained. If three different categories are obtained, repeat the test. If, upon repeating the test, three different
45、 categories are again obtained, report the result as 3A. 10.2 Express the result of the assessment of creaming as the category designation for which at least two identical results were obtained. If three different categories are obtained, repeat the test. If, upon repeating the test, three different
46、 categories are again obtained, report the result as 3R. 10.3 Express the result of the assessment of stability as the two category designations for separation and for creaming. EXAMPLE Three individual results for a fluid show categories 1A, 1A, 2A for oil separation and 2R, 2R, 3R for creaming. Th
47、e result of the assessment of stability is 1A 2R. 11 Precision The precision of this test method has not been determined. However, for guidance, in co-operative interlaboratory tests carried out at 40 C with a water of hardness equivalent to 400 mg/l of calcium carbonate, a 95 % confidence limit was
48、 established if the total amount of oil separation and creaming was no greater than 0,1 ml after 25 h standing. 12 Test report The test report shall contain at least the following information: a) a reference to this part of ISO 20783, i.e. ISO 20783-1:2010; b) the type and complete identification of
49、 the product tested, including the water type used for the preparation of the emulsion and the percentage concentration of the emulsifying oil used to make up the emulsion tested; c) the test conditions (see Clause 8); d) the result of the assessment of stability; e) the presence or absence of water separation at the bottom of the flasks; f) any deviation, by agreement or otherwise, from the procedure specified; g) the date of the test. BS EN ISO 20783-1:2011 ISO 20783-1:2011(E) 6 ISO 2011 All
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