1、BRITISH STANDARD AEROSPACE SERIES BS ISO 15859-13:2004 Space systems Fluid characteristics, sampling and test methods Part 13: Breathing air ICS 49.140 BS ISO 15859-13:2004 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 Au
2、gust 2004 BSI 12 August 2004 ISBN 0 580 44277 2 National foreword This British Standard reproduces verbatim ISO 15859-13:2004 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 Subcommit
3、tee 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 r
5、esponsible 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 ke
6、ep 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 7 and a back cover. The BSI copyright notice displayed in
7、 this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 15859-13:2004(E)INTERNATIONAL STANDARD ISO 15859-13 First edition 2004-06-01 Space systems Fluid characteristics, sampling and test methods Part 13: Breathing a
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13、hi n Switlrez dnaii BSISO1585913:2004 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 committees. Each member b
14、ody 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 the International Electro
15、technical 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 International Standards adopted
16、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 the subject of patent r
17、ights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15859-13 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 the general title Space
18、systems Fluid characteristics, sampling and 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: Water Part 11: Ammon
19、ia Part 12: Carbon dioxide Part 13: Breathing air BSISO1585913:2004iv 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 spacecraft. The purpose of IS
20、O 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 the fluid for loadin
21、g 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. BSISO1585913:2004 1Space systems Fluid characteristics, sampling and t
22、est methods Part 13: Breathing air 1 Scope This part of ISO 15859 specifies limits for the composition of breathing air and establishes the sampling and test requirements applicable for the verification of the breathing air composition. This part of ISO 15859 is applicable to sampling and test metho
23、ds for breathing air intended for purging and pressurization of space systems as well as flight hardware and ground support facilities, systems and equipment. This part of ISO 15859 may be applied to influent breathing air. This part of ISO 15859 is applicable to any sampling operation required to e
24、nsure 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 Normative references The following referenced documents are indispensable for the application of
25、 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 systems Fundamentals and vocabulary 3 Terms and definitions For the purposes of this document,
26、the terms and definitions given in ISO 9000 and the following apply. 3.1 total hydrocarbon content (as methane) single carbon atom equivalent 3.2 verification test analysis performed on the fluid in the container, or a sample thereof, which is representative of the supply, permitting the verificatio
27、n of fluid composition limits 4 Chemical composition Unless otherwise provided in an applicable technical specification, the composition of breathing air delivered to the flight vehicle interface shall be in accordance with the limits given in Table 1 when tested in accordance with the applicable te
28、st methods. BSISO1585913:20042 Table 1 Composition limits Limits Component Compressed source Liquid source Oxygen Volume fraction, % 19,5 to 23,8 20 to 23,8 Nitrogen Volume fraction, % 75,2 to 79,5 75,2 to 80 Rare gases (argon, krypton, hydrogen, xenon, helium, neon) Volume fraction, %, max. 1 1 Car
29、bon monoxide l/l, max. 10 5 Carbon dioxide l/l, max. 500 50 Water l/l, max.400 400 Odour None None Total hydrocarbons, as methane equivalent l/l, max. 25 50 Acetylene l/l, max.N/A 0,5 Halogenated hydrocarbons l/l, max. 2,0 2,0 Chlorinated hydrocarbons l/l, max. 0,2 0,2 Nitrous oxide l/l, max. 2,0 2,
30、0 Aromatic hydrocarbons, as benzene equivalent l/l, max. 0,5 0,5 N/A = not applicable 5 Procurement The breathing air specified in Clause 1 should be procured in accordance with an applicable national standard. 6 Fluid sampling 6.1 Plan In order to ensure that the fluid composition complies with the
31、 limits specified in this part of ISO 15859, 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 applicab
32、le to that task. Such a plan shall specify: the sampling points; the sampling procedures; the sampling frequency; the sample size; the number of samples; the test methods; the responsibilities of any involved operator. BSISO1585913:2004 36.2 Responsibility for sampling Unless otherwise provided in a
33、n applicable technical specification, the breathing air delivered to the flight vehicle interface shall be sampled and verified by the supplier responsible for providing the breathing air to the flight vehicle. The supplier may use his/her or any other resources suitable for the performance of the v
34、erification tests specified herein unless otherwise directed 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 tim
35、e agreed upon by the supplier and the customer. 6.5 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 ve
36、rification test, additional samples shall 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
37、 Unless otherwise provided by the applicable sampling plan, the fluid storage container shall not be refilled after the sample is taken. 6.8 Gaseous samples Gaseous samples shall be typical specimens from the breathing air supply. Samples shall be obtained in accordance with one of the following. a)
38、 By filling the sample container and storage containers at the same time, on the same manifold, and under the same conditions and with the same procedure. b) By withdrawing a sample from the supply container through a suitable connection into the sample container. No pressure regulator shall be used
39、 between the supply and the sample containers. (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 anal
40、ytical equipment using suitable pressure 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
41、 rejected fluid shall be specified by the customer. BSISO1585913:20044 7 Test methods 7.1 General The supplier will ensure, by standard practice, the quality level of breathing air. If required, alternate test methods are described in 7.3 to 7.13. Other test methods not listed in this part of ISO 15
42、859 are acceptable if agreed upon between the supplier and 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
43、 of the fluid from the facility at appropriate intervals 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 lim
44、iting characteristics of breathing air. 7.2 Parameters of analysis The parameters for analytical techniques contained in 7.3 to 7.13 are the following: a) purity shall be expressed as a percentage by volume (volume fraction, %) unless otherwise noted; b) calibration gas standards containing the appl
45、icable gaseous components may be required 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 fo
46、r standards; d) analytical equipment shall be operated in accordance with the manufacturers instructions. 7.3 Oxygen content The oxygen content shall be determined by one of the following procedures. a) By an electrochemical-type oxygen analyser containing a solid or an aqueous electrolyte. The anal
47、yser shall be calibrated at appropriate intervals by use of calibration gas standards or integrally in accordance with Faradays Law. The range used should be no greater than 10 times the specified maximum oxygen content. b) By a heat-of-reaction-type analyser. The analyser shall be calibrated at app
48、ropriate intervals by the use of calibration gas standards or integrally in accordance with Faradays Law. The range used should be no greater than 10 times the specified maximum oxygen content. c) By an analyser in which oxygen reacts to form a compound which is subsequently measured. The analyser s
49、hall be calibrated at appropriate intervals by the use of calibration standards. The range used shall be no greater than 10 times the specified maximum oxygen content. d) By a gas chromatograph. This method may be used not only for oxygen determination but also for the determination of any other limiting characteristic gaseous component. The analyser must be capable of separating and detecting the comp
