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1、BRITISH STANDARD BS EN ISO 11114-3:1998 Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 3: Autogenous ignition test in oxygen atmosphere The European Standar EN ISO 11114-3:1997, including Corrigendum April 1998, has the status of a British Standard I
2、CS 23.020.30; 23.060.40 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11114-3:1998 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Standard
3、s Board and comes into effect on 15 July 1998 BSI 04-1999 ISBN 0 580 29744 6 National foreword This British Standard is the English language version of EN ISO 11114-3:1997, including Corrigendum April 1998. It is identical with ISO 11114-3:1997. The UK participation in its preparation was entrusted
4、by Technical Committee PVE/3, Gas containers, to Subcommittee PVE/3/1, Valve fittings for gas containers, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, a
5、nd keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standar
6、ds normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “Inter
7、national Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a
8、British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 8 and a back cover. This standard has been updated (see copyright date) and may have had amendm
9、ents incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11114-3:1998 BSI 04-1999i Contents
10、 Page National forewordInside front cover Foreword2 Text of EN ISO 11114-33 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI E
11、UROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11114-3 October 1997 ICS 23.020.30; 23.060.40Incorporates Corrigendum April 1998 Descriptors: Gas pressure vessels, gas cylinders, gas valves, gases, compatibility, tests, determination, autoignition temperature, test report sheets English vers
12、ion Transportable gas cylinders Compatibility of cylinder and valve materials with gas contents Part 3: Autogenous ignition test in oxygen atmosphere (ISO 11114-3:1997) Bouteilles gaz transportables Compatibilit des matriaux des bouteilles et des robinets avec les contenus gazeux Partie 3: Essai dau
13、to-inflammation sous atmosphre doxygne (ISO 11114-3:1997) Ortsbewegliche Gasflaschen Vertrglichkeit von Werkstoffen fr Gasflaschen und Ventile mit den in Berhrung kommenden Gasen Teil 3: Prfung der Selbstentzndungstemperatur in sauerstoffhaltiger Atmosphre (ISO 11114-3:1997) This European Standard w
14、as approved by CEN on 18 September 1997. 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 concerning suc
15、h national standards may be obtained on application to the Central Secretariat 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
16、and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switz
17、erland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. R
18、ef. No. EN ISO 11114-3:1997 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11114-3:1997 BSI 04-1999 2 Foreword This text of EN ISO 11114-3:1997 has been prepared by Technical Committee CEN/TC 23 “Transportable gas cylinders”, the s
19、ecretariat of which is held by BSI, in collaboration with Technical Committee ISO/TC 58 “Gas cylinders”. The text of the draft standard was submitted to the Formal Vote and was approved by CEN as EN ISO 11114-3 on 97-09-18. This European Standard has been submitted for reference into the RID and/or
20、in the technical annexes of the ADR. 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 April 1998, and conflicting national standards shall be withdrawn at the latest by April 1998. According to the
21、 CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sw
22、eden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Principle3 3Preparation of test samples3 4Test apparatus3 5Oxygen purity3 6Test procedure3 7Results4 8Test record4 Annex A (informative) Test record sheet6 Annex B (informative) Bibliography7 Annex ZZ (informati
23、ve) Corresponding international and European Standards for which equivalents are not given in the text8 Figure 1 Example of apparatus for ignition test4 Figure 2 Typical autogenous ignition test curves5 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy
24、, (c) BSI EN ISO 11114-3:1997 BSI 04-19993 Introduction This Standard is one of a three-part Standard concerning compatibility of gases and gas mixtures with materials: Part 1: Metallic materials; Part 2: Non metallic materials; Part 3: Autogenous ignition test in oxygen atmosphere. The following te
25、st method is referenced in EN ISO 11114-1. Further information about oxygen compatibility is given in EN ISO 11114-1 and prEN ISO 11114-2. Other oxygen compatibility test methods include oxygen index (see ISO 4589), heat of combustion and adiabatic compression on materials. 1 Scope This standard spe
26、cifies a test method to determine the autogenous ignition temperature of non metallic materials in pressurized gaseous oxygen. Autogenous ignition temperature is a criterion for ranking materials, and can be used to assist with the choice of materials used in the presence of gaseous oxygen. Annex B
27、of this standard is a comprehensive bibliography of the published material on which this standard is based. NOTEThis standard can be used for the selection of nonmetallic materials for gas cylinders and accessories; for example, to select the materials in order to meet the requirement for type-testi
28、ng for oxygen compatibility of all oxygen gas cylinder valves as specified in EN 849. 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
29、 sudden increase in temperature and pressure is observed (this point is known as 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 materi
30、al shall be finely divided. A sample mass between 0,06 g and 0,5 g is used for each test. NOTEThis mass should be adusted to take into consideration the volume of the test cell. A sample of 0,5g in a test cell volume of between 30 cm3 and 250 cm3 has been found to be suitable. 4 Test apparatus Figur
31、e 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 electric oven with power sufficient to raise temperature at a constant rate as specified in clause 6. A thermocouple shall be position
32、ed 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 detector shall be provided. The pressure detector shall have an accuracy of 1 % at full scale. A pressure regulating device may be used if it is intended to keep oxygen pre
33、ssure constant during the test. NOTEAutogenous Ignition Temperature may depend on oxygen pressure. When the oxygen pressure is increased, the autogenous ignition temperature decreases and stabilizers beyond a certain pressure. Therefore, for ranking of materials, when the minimum Autogenous Ignition
34、 Temperature has to be determined, a starting pressure of 10 MPa (100 bar) 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-
35、the flame from the test sample. 5 Oxygen purity The oxygen used for the test shall have a purity of at least 99,5 % (V/V). The hydrocarbon content shall be limited to 100 ppm by volume (volume fraction # 104). 6 Test procedure The sample holder containing the test sample is placed into the reaction
36、chamber. The reaction chamber is then sealed and purged with oxygen to remove any air and any possible residual combustion products from preceding tests. The recommended purging procedure is to pressurize the reaction chamber to 1 MPa (10 bar) and vent to atmospheric pressure and to repeat this proc
37、edure 3 times. The 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 autogenous ignition temperature or up to a maximum temperature of 500 C. The heating rate shall be recorded. If constant pressure is
38、desired, adequate control shall be performed. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11114-3:1997 4 BSI 04-1999 From the continuous recording of the two parameters (temperature and pressure), the autogenous ignition temperatu
39、re is determined, which corresponds to the sudden increase in temperature and pressure caused by the internal reaction (see Figure 2). NOTEThe use of a high heating rate (greater then 20 C/min), when using an electrical filament furnace, may result in a lower autogenous ignition temperature than whe
40、n using the normal heating rate (between 5 C/min and 20 C/min). 7 Results The autogenous ignition temperature is the temperature, expressed in C, at which the sudden increase of temperature and associated increase of pressure commences. This point is determined from the temperature, pressure, time r
41、ecording 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 1In certain cases, a material can be required to have an autogenous ignition temperature higher than a speci
42、fied critical value. NOTE 2The temperature and pressure increases, %T and %p (see Figure 2), may characterize the violence of the reaction. Special requirements can also apply to these two parameters. NOTE 3Because the temperature and pressure increases, %T and %p, are affected by the relationship b
43、etween the size of the sample, the volume of the reaction chamber and the heating capacity of the oven, comparison between the results from different types of equipment 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 Ann
44、ex A. Figure 1 Example of apparatus for ignition test Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11114-3:1997 BSI 04-19995 NOTEThe figure shows the temperature and pressure versus time curves for a typical autogenous ignition tes
45、t carried out under nearly constant pressure. Figure 2 Typical autogenous ignition test curves Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11114-3:1997 6 BSI 04-1999 Annex A (informative) Test record sheet Licensed Copy: sheffield
46、un sheffieldun, na, Sat Nov 18 16:00:39 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11114-3:1997 BSI 04-19997 Annex B (informative) Bibliography 1. Gunter, M., “Ignition in High-Pressure Oxygen,” Ministry of Supply, S, “Compatibility of Materials with 7500 PSI Oxygen,” DDC AD 608260, ARML-TDR-
47、64-76, Union Carbide Coporation, Linde Division, Tonawanda, NY, Oct. 1964. 4. Marzani, J. A., “Spontaneous Ignition of Solid Materials at Elevated Pressures,” presented at the Eastern Section (Provisional), The Combustion Institute Symposium on Heterogenous Combustion, Oct. 1968. 5. Keeping, W. O.,
48、“Ignition of Materials in Gaseous Oxygen,” BOC Report 3875, British Oxygen Company, London, 1969. 6. Attwood, H. C. and Allen, G. R., “On the Spontaneous Ignition Temperature of Organic Materials in Oxygen,” Royal Aircraft Establishment Technical Report 70083, Ministry of Defence, Farnborough, Unite
49、d Kingdom, May 1970. 7. Lapin, A., “Oxygen Compatibility of Materials,” Reliability and Safety of Air Separation Plant, Annex 1973-1 to Bulletin de IInstitut International du Froid, 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 Materials in Oxygen-Enriched Atmospheres: First Volume, ASTM STP 812, Werley, B. L. Editor, American Society for T
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