1、BRITISH STANDARD AEROSPACE SERIES BS ISO 15859-12:2004 Space systems Fluid characteristics, sampling and test methods Part 12: Carbon dioxide ICS 49.140 BS ISO 15859-12:2004 This British Standard was published under the authority of the Standards Policy and S t r a t e g y C o m m i t t e e o n 12 A
2、ugust 2004 BSI 12 August 2004 ISBN 0 580 44276 4 National foreword This British Standard reproduces verbatim ISO 15859-12:2004 and implements it as the UK national standard. The UK participation in its preparation was entrusted by Technical Committee ACE/68, Space systems and operations, to Subcommi
3、ttee ACE/68/-/3, Operations and ground support, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be
4、 found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are
5、responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and k
6、eep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 4, an inside back cover and a back cover. The BSI copyri
7、ght notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 15859-12:2004(E)INTERNATIONAL STANDARD ISO 15859-12 First edition 2004-06-01 Space systems Fluid characteristics, sampling test methods P
8、art 12: Carbon dioxide Systmes spatiaux Caractristiques, chantillonnage et mthodes dessai des fluides Partie 12: Dioxyde de carbone BSISO1585912:2004DPlcsid Fremia ihTs PDF file mya ctnoian emdebt dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu slahl t
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13、e bwww.is.o gro Pulbisdehi n Switlrez dnaii BSISO1585912:2004 iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical c
14、ommittees. 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 part in the work. ISO collaborates closely with t
15、he 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 to prepare International Standards. Draft Internat
16、ional 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 that some of the elements of this document may be
17、 the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15859-12 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 14, Space systems and operations. ISO 15859 consists of the following parts, under
18、the general title Space systems Fluid characteristics, sampling test methods: Part 1: Oxygen Part 2: Hydrogen Part 3: Nitrogen Part 4: Helium Part 5: Nitrogen tetroxide propellants Part 6: Monomethylhydrazine propellant Part 7: Hydrazine propellant Part 8: Kerosine propellant Part 9: Argon Part 10:
19、Water Part 11: Ammonia Part 12: Carbon dioxide Part 13: Breathing air BSISO1585912:2004iv Introduction Fluid operations at a spaceport or launch site may involve a number of operators and supplier/customer interfaces, from the fluid production plant to the delivery to the launch vehicle or spacecraf
20、t. The purpose of ISO 15859 is to establish uniform requirements for the components, sampling and test methods of fluids used in the servicing of launch vehicles, spacecraft and ground support equipment. The fluid composition limits specified are intended to define the purity and impurity limits of
21、the fluid for loading into the launch vehicle or spacecraft. The fluid sampling and test methods are intended to be applied by any operator. The fluid sampling and test methods are acceptable methods for verification of the fluid composition limits. BSISO1585912:2004 1Space systems Fluid characteris
22、tics, sampling test methods Part 12: Carbon dioxide 1 Scope This part of ISO 15859 specifies limits for the composition of carbon dioxide (CO 2 ) and establishes the sampling and test requirements applicable for the verification of the carbon dioxide composition. This part of ISO 15859 is applicable
23、 to composition, sampling, and test methods for carbon dioxide intended for purging and pressurization in both space systems flight hardware and ground support facilities, systems, and equipment. This part of ISO 15859 may be applied to carbon dioxide influents. Carbon dioxide may be of the gaseous
24、or liquid type. This part of ISO 15859 is applicable to any sampling operation required to ensure that, when the fluid enters the launch vehicle or spacecraft, the fluid composition complies with the limits provided hereafter or with any technical specification agreed to for a particular use. 2 Norm
25、ative 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 any amendments) applies. ISO 9000, Quality management sys
26、tems Fundamentals and vocabulary 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 9000 and the following apply. 3.1 verification test analysis performed on the fluid in the container, or a sample thereof, which is representative of the supply, permitt
27、ing the verification of fluid composition limits 4 Chemical composition Unless otherwise provided in an applicable technical specification, the composition of carbon dioxide delivered to the flight vehicle interface shall be in accordance with the limits given in Table 1 when tested in accordance wi
28、th the applicable test methods. BSISO1585912:20042 Table 1 Composition limits Component Limit Carbon dioxide purity volume fraction, %, min. 99 Water, at 21 C and 760 mm Hg mg per litre of gas, max. 0,092 5 Procurement The carbon dioxide specified in Clause 1 should be procured in accordance with an
29、 applicable national standard. 6 Fluid sampling CAUTION Carbon dioxide is an asphyxiant. Care should be taken to prevent high concentrations of gaseous carbon dioxide in confined spaces. 6.1 Plan In order to ensure that the fluid composition complies with the limits specified in this part of ISO 158
30、59, a fluid sampling plan should be established by all the involved operators, from the production to the space vehicle interface, and approved by the final user. Sampling activities and test methods shall comply with all safety regulations and rules applicable to that task. This plan shall specify
31、the sampling points, the sampling procedures, the sampling frequency, the sample size, the number of samples, the test methods, and the responsibilities of any involved operator. 6.2 Responsibility for sampling Unless otherwise provided in an applicable technical specification, the carbon dioxide de
32、livered to the flight vehicle interface shall be sampled and verified by the supplier responsible for providing the carbon dioxide to the flight vehicle. The supplier may use his/her or any other resources suitable for the performance of the verification tests specified herein unless otherwise direc
33、ted by the customer. 6.3 Sampling points Unless otherwise specified, sampling shall be conducted at the fluid storage site or the flight vehicle interface. 6.4 Sampling frequency Sampling shall be performed annually or in accordance with a time agreed upon by the supplier and the customer. BSISO1585
34、912:2004 36.5 Sample size The quantity in a single sample container shall be sufficient to perform the analysis for the limiting characteristics. If a single sample does not contain a sufficient quantity to perform all of the analyses for the required quality verification test, additional samples sh
35、all be taken under similar conditions. 6.6 Number of samples The number of samples shall be in accordance with one of the following: a) one sample per storage container; b) any number of samples agreed upon by the supplier and the customer. 6.7 Storage container Unless otherwise provided by the appl
36、icable sampling plan, the fluid storage container shall not be refilled after the sample is taken. 6.8 Gaseous samples Gaseous samples shall be a typical specimen of the carbon dioxide supply. Samples shall be obtained in accordance with one of the following. a) By filling the sample container and s
37、torage containers at the same time, on the same manifold, and under the same conditions and with the same procedures. b) By withdrawing a sample from the supply container through a suitable connection into the sample container. No pressure regulator shall be used between the supply and the sample co
38、ntainers. (Suitable valves are permissible.) For safety reasons, the sample container and sampling system shall have a rated service pressure at least equal to the pressure in the supply container. c) By connecting the container being sampled directly to the analytical equipment using suitable press
39、ure regulation to prevent over-pressurizing this equipment. 6.9 Rejection When any sample of the fluid tested in accordance with Clause 7 fails to conform to the requirements specified herein, the fluid represented by the sample shall be rejected. Disposal of the rejected fluid shall be specified by
40、 the customer. 7 Test methods 7.1 General The supplier will ensure, by standard practice, the quality level of carbon dioxide. If required, alternate test methods are described in 7.3 to 7.4. Other test methods not listed in this part of ISO 15859 are acceptable if agreed upon between the supplier a
41、nd the customer. These tests are a single analysis or a series of analyses performed on the fluid to ensure the reliability of the storage facility to supply the required quality level. This can be verified by analysis of representative samples of the fluid from the facility at appropriate intervals
42、 as agreed upon between supplier and the customer. Tests may be performed by the supplier or by a laboratory agreed upon between the supplier and the customer. The analytical requirements for the tests shall include the determination of all limiting characteristics of carbon dioxide. BSISO1585912:20
43、044 7.2 Parameters of analysis The parameters for analytical techniques contained in 7.3 and 7.4 are the following: a) purity shall be expressed as a percentage by volume (volume fraction, %) unless otherwise noted; b) calibration gas standards containing the applicable gaseous components may be req
44、uired to calibrate the analytical instruments used to determine the limiting characteristic levels of fluid; c) if required by the customer, the accuracy of the measuring equipment used in preparing these standards shall be traceable to an established institute for standards; d) analytical equipment
45、 shall be operated in accordance with the manufacturers instructions. 7.3 Carbon dioxide purity The carbon dioxide purity shall be determined by one of the following procedures. a) By a volumetric absorption (Orsat type) gas analysis apparatus. b) By a gas chromatograph capable of separating and det
46、ermining the components of interest. c) By determining the amount of the aggregate impurities using other acceptable methods. The purity of carbon dioxide is the value obtained when the quantity of aggregate impurities, expressed as a volume fraction (%), is subtracted from 100. 7.4 Water content Th
47、e water content shall be determined by one of the following procedures. a) By an apparatus employing a detector tube filled with a colour-reactive chemical. The degree of accuracy is dependent on the precision of the measurements and the analytical bias of the tube. b) By an electrolytic hygrometer
48、having an indicator graduated in cubic centimetres per cubic metre within a range which is not greater than 10 times the specified maximum water content. c) By a dew-point analyser in which the temperature of a viewed surface is measured at the time water first begins to form. d) By a piezoelectric
49、sorption hygrometer, of which the accuracy of analysis shall be 0,1 cm 3 /m 3or 5 % of the reading, whichever is greater. e) By a metal-oxide-capacitor-equipped analyser within a range which is not greater than 10 times the specific maximum water content. BSISO1585912:2004blankBS ISO 15859-12:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national
