DIN EN ISO 11114-3-2011 Gas cylinders - Compatibility of cylinder and valve materials with gas contents - Part 3 Autogenous ignition test for non-metallic materials in oxygen atmos.pdf

1、April 2011 Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 2

2、3.020.30; 23.060.40!$nod“1757665www.din.deDDIN EN ISO 11114-3Gas cylinders Compatibility of cylinder and valve materials with gas contents Part 3: Autogenous ignition test for non-metallic materials in oxygenatmosphere (ISO 11114-3:2010)English translation of DIN EN ISO 11114-3:2011-04Gasflaschen Ve

3、rtrglichkeit von Flaschen- und Ventilwerkstoffen mit den in Berhrung kommendenGasen Teil 3: Prfung der Selbstentzndungstemperatur von nichtmetallischen Werkstoffen inSauerstoffatmosphre (ISO 11114-3:2010)Englische bersetzung von DIN EN ISO 11114-3:2011-04Bouteilles gaz Compatibilit des matriaux de b

4、outeilles et de robinets avec les contenus gazeux Partie 3: Essai dauto-inflammation des matriaux non mtalliques sous atmosphredoxygne (ISO 11114-3:2010)Traduction anglaise de DIN EN ISO 11114-3:2011-04SupersedesDIN EN ISO 11114-3:1998-06www.beuth.deDocument comprises pagesIn case of doubt, the Germ

5、an-language original shall be considered authoritative.1303.11 DIN EN ISO 11114-3:2011-04 A comma is used as the decimal marker. National foreword This document has been prepared by Technical Committee ISO/TC 58 “Gas cylinders” in collaboration with Technical Committee CEN/TC 23 “Transportable gas c

6、ylinders” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Druckgasanlagen (Pressurized Gas Installations Standards Committee), Working Committee NA 016-00-03 AA Druckgas-flaschen und Ausrstung. Amendments This standard differs from

7、DIN EN ISO 11114-3:1998-06 as follows: a) the standard has been revised in form and substance; b) the standard has been brought in line with the current rules of presentation. Previous editions DIN EN ISO 11114-3: 1998-06 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11114-3 December 20

8、10 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 bouteilles et d

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

10、lischen 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 EuropeanStandard the status of a national standard wi

11、thout 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, German). A version in any othe

12、r 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, Croatia, Cyprus, Czech Republic,

13、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 STANDARDIZATION COMIT EUROPEN DE NORMAL

14、ISATION 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: EContents Page Foreword .3 Introduction.4 1 Scope5 2 Principle .5 3

15、Preparation of test samples .5 4 Test apparatus.5 5 Oxygen purity 7 6 Test procedure.7 7 Results8 8 Test record .8 Annex A (informative) Test record sheet.9 Bibliography10 DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E) 2Foreword This document (EN ISO 11114-3:2010) has been prepared by Technical

16、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 national standard, either by publication of an identical text or by endorsement, at the

17、 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 rights. CEN and/or CENELEC shall not be held responsible for identifying any or all su

18、ch 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 European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Esto

19、nia, 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 11114-3:2010 has been approved by C

20、EN as a EN ISO 11114-3:2010 without any modification. DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E) 3Introduction 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 compatib

21、ility test methods include oxygen index (see ISO 4589-3), heat of combustion and adiabatic compression on materials (see ISO 21010). DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E) 41 Scope This part of ISO 11114 specifies a test method to determine the autogenous ignition temperature of non-meta

22、llic materials in pressurized gaseous oxygen. The autogenous ignition temperature is one criterion for ranking materials, and can be used to assist with the choice of materials used in the presence of gaseous oxygen. A comprehensive bibliography of the published material on which this part of ISO 11

23、114 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 accessories, for example to select the materials in order to meet the requirement for type testing for oxygen compatibility of all cylinder valves for highly

24、 oxidizing gases as specified in ISO 10297. 2 Principle A small quantity of the test material is heated in pressurized oxygen. A continuous recording is made of pressure and temperature in order to determine the point of autogenous ignition, at which point a sudden increase in temperature and pressu

25、re is observed (this point is known as the autogenous ignition temperature). 3 Preparation of test samples Test samples shall be prepared in such a manner 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 m

26、ass 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. 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 examp

27、le 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 electric oven with sufficient power to raise temperature at a constant rate as specified in Clause 6. DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E)

28、 5Key 1 water 2 oxygen 3 cooling coil 4 pressure transducer 5 temperature transducer 6 sample holder 7 reaction chamber 8 electrical 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 sha

29、ll have an accuracy of 2 C between 25 C and 500 C. A pressure transducer shall be provided. The pressure transducer shall have an 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 temper

30、ature can depend on oxygen pressure. When the oxygen pressure is increased, the autogenous ignition temperature decreases and stabilizes beyond a certain pressure. Therefore, for ranking of materials, when the minimum autogenous ignition temperature has to be determined, a starting pressure of 100 b

31、ar is recommended. The equipment, and in particular the reaction chamber, shall be designed to resist violent internal reactions (explosions). In some designs, the temperature- and pressure-measuring devices could be exposed to the flame from the test sample. DIN EN ISO 11114-3:2011-04 EN ISO 11114-

32、3:2010 (E) 65 Oxygen purity The oxygen used for the test shall have a purity of at least a volume fraction of 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

33、. The reaction chamber is then sealed and purged with oxygen to remove any air and any possible residual combustion 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. T

34、he oxygen pressure is then increased to the pressure required for the particular test. The temperature is then 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, ade

35、quate control shall be performed. From the continuous recording of the two parameters (temperature and pressure), 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

36、high heating rate (greater then 20 C/min), when using an electrical filament furnace, can result in a lower autogenous 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 autogen

37、ous ignition test carried out under nearly constant pressure. Key 1 pressure 2 temperature 3 autogenous ignition temperature 4 pFigure 2 Typical autogenous ignition test graph DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E) 77 Results The autogenous ignition temperature is the temperature, expres

38、sed in degrees Celsius, at which the sudden increase in temperature and associated increase 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 press

39、ure, p, caused by the ignition are determined as illustrated in Figure 2. NOTE 1 In certain 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 Fig

40、ure 2), characterize the violence of the reaction. Special requirements can also apply to 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

41、 of the heater, a comparison between the results from different types of test apparatus cannot 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. DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E) 8Annex A (informative) T

42、est record sheet AUTOGENOUS IGNITION TEST Test N ISO 11114-3 Date 1 - 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

43、 RESULTS Mass of test sample, g: _Heating rate, C/min: _Starting pressure, 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)

44、 The user of this form is allowed to reproduce this form.DIN EN ISO 11114-3:2011-04 EN ISO 11114-3:2010 (E) 9Bibliography 1 ISO 4589-3, Plastics Determination of burning behaviour by oxygen index Part 3: Elevated-temperature test 2 ISO 10297, Transportable gas cylinders Cylinder valves Specification

45、 and type testing 3 ISO 11114-1, Gas cylinders Compatibility of cylinder and valve materials with gas contents Part 1: Metallic materials 4 ISO 11114-2, Gas cylinders Compatibility of cylinder and valve materials with gas contents Part 2: Non-metallic materials 5 ISO 11114-4, Transportable gas cylin

46、ders Compatibility of cylinder and valve materials with gas contents Part 4: Test methods for selecting metallic materials resistant to hydrogen embrittlement 6 ISO 21010, Cryogenic vessels Gas/materials compatibility 7 LAPIN, A. Oxygen Compatibility of Materials. Reliability and Safety of Air Separation Plant, Annex 1973-1 to “Bulletin de lInstitut International du Froid”, 1973, pp. 79-94 8 MCQUAID, R.W., SHEETS, D.G. and BIEBERICH, M.J. Determination of Autogenous Ignition Temperatures of a Steam Turbine Lubricating Oil in Nitrogen and Oxygen Mixtures. Flammability and Sensitivity of Ma