1、BS EN ISO4080:2009ICS 23.040.70NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDRubber and plasticshoses and hoseassemblies Determination ofpermeability to gas(ISO 4080:2009)This British Standardwas published under theauthority of the StandardsPolicy and Strategy
2、Committee on 28 February2010. BSI 2010ISBN 978 0 580 58380 3Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 4080:2009National forewordThis British Standard is the UK implementation of EN ISO 4080:2009. Itsupersedes BS EN ISO 4080:1995which is withdrawn.The UK participation in it
3、s preparation was entrusted to TechnicalCommittee PRI/66/-/4, Rubber and plastics tubing, hoses and hoseassemblies - Methods of test.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisi
4、onsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4080 December 2009 ICS 23.040.70 Supersedes EN ISO 4080:1995English Version Rubber and plastics
5、 hoses and hose assemblies - Determination of permeability to gas (ISO 4080:2009) Tuyaux et flexibles en caoutchouc et en plastique - Dtermination de la permabilit au gaz (ISO 4080:2009) Gummi- und Kuntstoffschluche und -schlauchleitungen - Bestimmung der Gasdurchlssigkeit (ISO 4080:2009) This Europ
6、ean Standard was approved by CEN on 19 September 2009. CEN members are bound to comply 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
7、concerning such national standards may be obtained on application to the CEN 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 i
8、ts own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, L
9、ithuania, Luxembourg, Malta, Netherlands, Norway, Poland, 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 20
10、09 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4080:2009: EBS EN ISO 4080:2009EN ISO 4080:2009 (E) 3 Foreword This document (EN ISO 4080:2009) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“
11、in collaboration with Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblies” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2
12、010, and conflicting national standards shall be withdrawn at the latest by June 2010. 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 such patent rights.
13、 This document supersedes EN ISO 4080:1995. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany
14、, 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 4080:2009 has been approved by CEN as a EN ISO 4080:2009 without
15、 any modification. BS EN ISO 4080:2009ISO 4080:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Test pieces .2 5 Conditioning of test pieces 2 6 Test temperature .2 7 Test gas 2 8 Test pressure .2 9 Apparatus.2 10 Procedu
16、re.3 11 Expression of results6 12 Test report7 BS EN ISO 4080:2009ISO 4080:2009(E) iv ISO 2009 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standard
17、s 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 liaison with ISO, also take
18、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 with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is t
19、o 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 approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility
20、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 4080 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics). This fo
21、urth edition cancels and replaces the third edition (ISO 4080:1991), which has been technically revised to clarify the test method procedures and to standardize the units in the expression of results clause for method 1 and method 2. It also incorporates the Technical Corrigendum ISO 4080:1991/Cor.2
22、:1998. BS EN ISO 4080:2009INTERNATIONAL STANDARD ISO 4080:2009(E) ISO 2009 All rights reserved 1Rubber and plastics hoses and hose assemblies Determination of permeability to gas WARNING Persons using this International Standard should be familiar with normal laboratory practice. This standard does
23、not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies three methods
24、for the determination of the volume of gas diffusing through a rubber or plastics hose or length of tubing in a specified time. Method 1: For determining the permeability of the complete hose or length of tubing, excluding end-fittings, to the test gas. The permeability is calculated with respect to
25、 the length of the hose or tubing. Method 2: For determining the permeability at the hose/fitting interface. This method is used when determining the permeability characteristics of hoses with an unpricked cover, when the gas usually issues from the textile reinforcement at the cut ends. The permeab
26、ility is calculated with respect to the length of the hose. Method 3: For determining precisely the permeability of a hose or hose assembly to the test gas. The permeability is calculated with respect to the surface area of the hose lining. The methods are applicable only to gases which are insolubl
27、e in water. NOTE 1 Although the results are expressed in the same units for methods 1 and 2, the results obtained will not necessarily be comparable in the case of unpricked and pricked hoses intended for the same application as the test times specified are different and the permeability could there
28、fore vary. NOTE 2 Method 3 is the preferred method. 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 of the referenced document (including
29、 any amendments) applies. ISO 8330, Rubber and plastics hoses and hose assemblies Vocabulary ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 833
30、0 apply. BS EN ISO 4080:2009ISO 4080:2009(E) 2 ISO 2009 All rights reserved4 Test pieces 4.1 Method 1 The test piece shall be a length of hose or tubing long enough to ensure that the length of the exposed hose or tubing under the gas-collecting trough is 1 m. NOTE The cover of a hose test piece may
31、 be pricked. 4.2 Method 2 The test piece shall be a length of unpricked hose or tubing fitted with end couplings. It shall have a free length of 1 m between the couplings. NOTE The type of coupling used and the method by which the couplings are fixed to the test piece can affect the results obtained
32、 using this method. 4.3 Method 3 The test piece shall be a length of unpricked hose fitted with end couplings. It shall have a free length of 0,5 m between the couplings. 5 Conditioning of test pieces No test shall be carried out within 24 h of manufacture. Before testing, the test pieces shall be c
33、onditioned, in accordance with ISO 23529, for at least 3 h at the specified temperature and humidity. 6 Test temperature Unless otherwise specified in the product standard, the test shall be carried out at a temperature of 23 C 2 C. 7 Test gas The test gas shall be as specified in the product standa
34、rd. 8 Test pressure Unless otherwise specified in the product standard, the test shall be carried out at a gas pressure of 1 MPa (10 bar). 9 Apparatus NOTE Schematic layouts of the test arrangements for the three test methods are shown in Figures 1 to 3. 9.1 Water bath, capable of being maintained a
35、t a specified temperature and of sufficient length to accommodate the test piece. 9.2 Gas supply, provided with a suitable pressure gauge and emergency excess flow shutoff valves in case of test piece failure. BS EN ISO 4080:2009ISO 4080:2009(E) ISO 2009 All rights reserved 39.3 Gas-collecting appar
36、atus, comprising measuring cylinders and in some instances additional apparatus appropriate to each of the three methods, as illustrated in Figures 1 to 3, respectively. The capacity and accuracy of the measuring cylinders shall be selected in accordance with the volume of gas that is expected to be
37、 collected. 9.4 Barometer, to record the barometric pressure during the test. 9.5 Two thermometers, to record the water temperature and air temperature at the gas-collection point. 10 Procedure 10.1 Method 1 Attach the appropriate feed and tail couplings to the test piece. Connect one end of the tes
38、t piece to the specified gas supply (9.2) with a suitable connector. Purge the test assembly with gas for 30 s to expel the air before finally sealing the test assembly by blanking off the other end. Adjust the temperature of the water bath (9.1) to the specified value. Immerse the test assembly in
39、the water bath. Apply the gas pressure and maintain this pressure for 72 h prior to collecting any gas. Arrange the gas-collecting apparatus (9.3) above the test piece as shown in Figure 1 and measure and record the time taken to collect 3,0 cm3of gas. If the volume of gas collected after 24 h is le
40、ss than 3,0 cm3but more than 1 cm3, then this can be taken as the reading. Repeat the measurement a further two times. Alternatively, measure the volume of gas collected in a 24 h period. If the permeability is required to be determined at different pressures, test at the lowest pressure first and t
41、hen at increasing pressure levels. 10.2 Method 2 Attach the appropriate feed and tail couplings to the test piece. Connect the feed end to the specified gas supply (9.2) and purge the assembly with gas for 30 s to expel the air before finally sealing the test assembly by blanking off the tail coupli
42、ng. Maintaining the test assembly at the specified test temperature, apply the gas pressure to the assembly and maintain this pressure for 24 h. Following this period, immerse the test assembly and its end connections in the water bath (9.1) at the specified temperature (see Figure 2). Position the
43、two measuring cylinders and the collection funnels as shown in Figure 2 so as to collect and measure any gas which escapes from the two ends of the test piece for a period of 1 h. Record the total volume of gas collected as the first reading. Then remove the assembly from the water bath and hold it
44、at the specified temperature and gas pressure for another 24 h. After 24 h, re-immerse the assembly in the water bath and collect and measure the gas as previously. Carry out this process a total of six times. If the permeability is required to be determined at different pressures, test at the lowes
45、t pressure first and then at increasing pressure levels. NOTE It is important to remove the assembly from the water bath after each 1 h period and not leave it immersed, since the exposed textile reinforcement could swell and lead to unrepresentative results. BS EN ISO 4080:2009ISO 4080:2009(E) 4 IS
46、O 2009 All rights reservedKey 1 gas supply 2 collecting trough 3 measuring cylinder 4 test piece 5 1 m of free hose 6 water bath Figure 1 Schematic apparatus for method 1 BS EN ISO 4080:2009ISO 4080:2009(E) ISO 2009 All rights reserved 55 6 4 1 3 3 2 2 Key 1 gas supply 2 measuring cylinders 3 collec
47、ting funnels 4 water bath 5 1 m of hose 6 test piece Figure 2 Schematic apparatus for method 2 10.3 Method 3 Partially seal one end of the test piece and connect the other end to the specified gas supply (9.2). Purge the test assembly with gas for 30 s to expel the air before finally sealing the tes
48、t assembly. Adjust the temperature of the water bath (9.1) to the specified temperature. Insert the test assembly into the glass tube and immerse in the water bath so that they are inclined at approximately 20 to the horizontal (see Figure 3). Apply the gas pressure and maintain it for 14 days. At t
49、he end of this period, while still maintaining the specified pressure, collect the gas for 6 h or record the time to collect between 450 cm3and 500 cm3of gas. Repeat this procedure every 24 h until two successive gas volumes are within 5 % of each other. Use the average of these two successive readings for the calculation of the permeability. If the permeability is required to be determined at different pressures, test at the lowest pressure first and then at increasing pressure levels. BS EN ISO 4080:2009ISO 4080:2009(E) 6 ISO 200
