EN ISO 11114-3-2010 en Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 3 Autogenous ignition test for non-metallic materials in oxygen atmosp.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 11114-3:2010Gas cylinders Compatibilityof cylinder and valve materialswith gas contentsPart 3: Autogenous ignition test for non-metallic materials in oxygen atmosphere(

2、ISO 11114-3:2010)BS EN ISO 11114-3:2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO11114-3:2010. It supersedes BS EN ISO 11114-3:1998 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PVE/3, Gas containers.A li

3、st of organizations represented on this 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 2011ISBN 978 0 580 65832 7ICS 23.020.30Compliance with a British

4、Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11114-3 December

5、2010 ICS 23.020.30 Supersedes EN ISO 11114-3:1997English Version Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 3: Autogenous ignition test for non-metallic materials in oxygen atmosphere (ISO 11114-3:2010) Bouteilles gaz - Compatibilit des matriaux de bouteil

6、les et de robinets avec les contenus gazeux - Partie 3: Essai dauto-inflammation des matriaux non mtalliques sous atmosphre doxygne (ISO 11114-3:2010) Ortsbewegliche Gasflaschen - Vertrglichkeit von Flaschen- und Ventilwerkstoffen mit den in Berhrung kommenden Gasen - Teil 3: Prfung der Selbstentznd

7、ungstemperatur von nichtmetallischen Werkstoffen in Sauerstoffatmosphre (ISO 11114-3:2010)This European Standard was approved by CEN on 14 December 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the sta

8、tus 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-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, G

9、erman). 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 same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croa

10、tia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDI

11、ZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11114-3:2010: EBS EN ISO 11114-3:2010EN ISO 11114-3:

12、2010 (E) 3 Foreword This document (EN ISO 11114-3:2010) has been prepared by Technical Committee ISO/TC 58 “Gas cylinders“ in collaboration with Technical Committee CEN/TC 23 “Transportable gas cylinders” the secretariat of which is held by BSI. This European Standard shall be given the status of a

13、national standard, either by publication of an identical text or by endorsement, at the latest by June 2011, and conflicting national standards shall be withdrawn at the latest by June 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

14、 rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 11114-3:1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europe

15、an Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the

16、 United Kingdom. Endorsement notice The text of ISO 11114-3:2010 has been approved by CEN as a EN ISO 11114-3:2010 without any modification. BS EN ISO 11114-3:2010ISO 11114-3:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Principle .1 3 Preparation of tes

17、t samples .1 4 Test apparatus.1 5 Oxygen purity 3 6 Test procedure.3 7 Results4 8 Test record .4 Annex A (informative) Test record sheet.5 Bibliography6 BS EN ISO 11114-3:2010ISO 11114-3:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for Standardization) is a wor

18、ldwide 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 established has the right to be represented on

19、 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. International Standards are drafted

20、in accordance 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 Standar

21、d requires approval 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. This part of ISO 11114 was

22、prepared by Technical Committee ISO/TC 58, Gas cylinders. This second edition cancels and replaces the first edition (ISO 11114-3:1997). No significant technical changes have been made. ISO 11114 consists of the following parts, under the general title Gas cylinders Compatibility of cylinder and val

23、ve materials with gas contents: Part 1: Metallic materials Part 2: Non-metallic materials Part 3: Autogenous ignition test for non-metallic materials in oxygen atmosphere Part 4: Test methods for selecting metallic materials resistant to hydrogen embrittlement BS EN ISO 11114-3:2010ISO 11114-3:2010(

24、E) ISO 2010 All rights reserved vIntroduction The following test method is referenced in ISO 11114-1 and ISO 11114-2. Further information about oxygen compatibility is given in ISO 11114-1 and ISO 11114-2. Other oxygen compatibility test methods include oxygen index (see ISO 4589-3), heat of combust

25、ion and adiabatic compression on materials (see ISO 21010). BS EN ISO 11114-3:2010BS EN ISO 11114-3:2010INTERNATIONAL STANDARD ISO 11114-3:2010(E) ISO 2010 All rights reserved 1Gas cylinders Compatibility of cylinder and valve materials with gas contents Part 3: Autogenous ignition test for non-meta

26、llic materials in oxygen atmosphere 1 Scope This part of ISO 11114 specifies a test method to determine the autogenous ignition temperature of non-metallic materials in pressurized gaseous oxygen. The autogenous ignition temperature is one criterion for ranking materials, and can be used to assist w

27、ith the choice of materials used in the presence of gaseous oxygen. A comprehensive bibliography of the published material on which this part of ISO 11114 is based is included. It is intended that this part of ISO 11114 be used for the selection of non-metallic materials for gas cylinders and access

28、ories, for example to select the materials in order to meet the requirement for type testing for oxygen compatibility of all cylinder valves for highly oxidizing gases as specified in ISO 10297. 2 Principle A small quantity of the test material is heated in pressurized oxygen. A continuous recording

29、 is made of pressure and temperature in order to determine the point of autogenous ignition, at which point a sudden increase in temperature and pressure is observed (this point is known as the autogenous ignition temperature). 3 Preparation of test samples Test samples shall be prepared in such a m

30、anner as to prevent contamination. Test samples may be in liquid or solid form. In the case of solids, the material shall be finely divided. A sample mass between 0,06 g and 0,5 g is used for each test. This mass should be adjusted to take into consideration the volume of the test reaction chamber.

31、A sample of 0,5 g in a test reaction chamber volume of between 30 cm3and 250 cm3has been found to be suitable. 4 Test apparatus Figure 1 gives an example of a suitable test apparatus. The test sample is put into a small, carefully cleaned inert sample holder, placed in a reaction chamber within an e

32、lectric oven with sufficient power to raise temperature at a constant rate as specified in Clause 6. BS EN ISO 11114-3:2010ISO 11114-3:2010(E) 2 ISO 2010 All rights reservedKey 1 water 2 oxygen 3 cooling coil 4 pressure transducer 5 temperature transducer 6 sample holder 7 reaction chamber 8 electri

33、cal heater 9 test sample Figure 1 Example of apparatus for ignition test A thermocouple shall be positioned as closely as possible to the test sample. The thermocouple shall have an accuracy of 2 C between 25 C and 500 C. A pressure transducer shall be provided. The pressure transducer shall have an

34、 accuracy of 1 % at full scale. A pressure-regulating device may be used if it is intended to keep oxygen pressure constant during the test. The autogenous ignition temperature can depend on oxygen pressure. When the oxygen pressure is increased, the autogenous ignition temperature decreases and sta

35、bilizes beyond a certain pressure. Therefore, for ranking of materials, when the minimum autogenous ignition temperature has to be determined, a starting pressure of 100 bar is recommended. The equipment, and in particular the reaction chamber, shall be designed to resist violent internal reactions

36、(explosions). In some designs, the temperature- and pressure-measuring devices could be exposed to the flame from the test sample. BS EN ISO 11114-3:2010ISO 11114-3:2010(E) ISO 2010 All rights reserved 35 Oxygen purity The oxygen used for the test shall have a purity of at least a volume fraction of

37、 99,5 %. The hydrocarbon content shall be limited to 100 106by volume (volume fraction u104). 6 Test procedure The sample holder containing the test sample is placed into the reaction chamber. The reaction chamber is then sealed and purged with oxygen to remove any air and any possible residual comb

38、ustion products from preceding tests. The common purging procedure is to pressurize the reaction chamber to 10 bar and vent to atmospheric pressure and to repeat this procedure three times. The oxygen pressure is then increased to the pressure required for the particular test. The temperature is the

39、n raised at a constant heating rate up to the autogenous ignition temperature or up to a maximum temperature of 500 C. The heating rate shall be recorded. If constant pressure is desired, adequate control shall be performed. From the continuous recording of the two parameters (temperature and pressu

40、re), the autogenous ignition temperature is determined, which corresponds to the sudden increase in temperature and pressure caused by the internal reaction (see Figure 2). NOTE The use of a high heating rate (greater then 20 C/min), when using an electrical filament furnace, can result in a lower a

41、utogenous ignition temperature than when using the normal heating rate (between 5 C/min and 20 C/min). NOTE Figure 2 shows the temperature and pressure versus time graph for a typical autogenous ignition test carried out under nearly constant pressure. Key 1 pressure 2 temperature 3 autogenous ignit

42、ion temperature 4 pFigure 2 Typical autogenous ignition test graph BS EN ISO 11114-3:2010ISO 11114-3:2010(E) 4 ISO 2010 All rights reserved7 Results The autogenous ignition temperature is the temperature, expressed in degrees Celsius, at which the sudden increase in temperature and associated increa

43、se in pressure commences. This point is determined from the temperature and pressure versus time recording graph as illustrated in Figure 2. The magnitude of the increase in temperature, T, and increase in pressure, p, caused by the ignition are determined as illustrated in Figure 2. NOTE 1 In certa

44、in cases, as an acceptance criterion, a material can be required to have an autogenous ignition temperature higher than a specified critical value. NOTE 2 The temperature and pressure increases, T and p (see Figure 2), characterize the violence of the reaction. Special requirements can also apply to

45、 these two parameters. NOTE 3 Because the temperature and pressure increases, T and p, are affected by the relationship between the size of the sample, the volume of the reaction chamber and the heating capacity of the heater, a comparison between the results from different types of test apparatus c

46、annot easily be made. 8 Test record The test results shall be recorded on a test record sheet, an example of which is shown in Annex A. BS EN ISO 11114-3:2010ISO 11114-3:2010(E) ISO 2010 All rights reserved 5Annex A (informative) Test record sheet AUTOGENOUS IGNITION TEST Test N ISO 11114-3 Date 1 -

47、 TEST PERFORMED FOR CUSTOMER _2 - TESTED MATERIAL _Function: _Conditions of use: Temperature, C _Pressure, bar _Assumed generic type: _Condition, shape, appearance: _Manufacturer: _Supplier: _Trade name: _3 - TESTING CONDITIONS AND RESULTS Mass of test sample, g: _Heating rate, C/min: _Starting pres

48、sure, bar (gauge): _Pressure, bar Temperature, C Autogenous ignition test Peak p Autogenous ignition test Peak T Remarks: 4 - AUTOGENOUS IGNITION TEMPERATURE, C 5 - COMMENTS Authorized signature (and test laboratory identification) The user of this form is allowed to reproduce this form.BS EN ISO 11114-3:2010ISO 11114-3:2010(E) 6 ISO 2010