BS ISO 15859-3-2004 Aerospace series - Space systems - Fluid characteristics sampling and test methods - Nitrogen《航空航天系列 航天系统 流体特性、抽样和试验方法 氮》.pdf

1、BRITISH STANDARD AEROSPACE SERIES BS ISO 15859-3:2004 Space systems Fluid characteristics, sampling and test methods Part 3: Nitrogen ICS 49.140 BS ISO 15859-3:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 16 August 2004 BSI 16 August

2、2004 ISBN 0 580 44267 5 National foreword This British Standard reproduces verbatim ISO 15859-3:2004 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 Subcommittee ACE/68/-/3, Operation

3、s 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 found in the BSI Catalogu

4、e 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 responsible for its correc

5、t 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 keep the UK interests infor

6、med; 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 10, an inside back cover and a back cover. The BSI copyright notice displayed in t

7、his document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 15859-3:2004(E)INTERNATIONAL STANDARD ISO 15859-3 First edition 2004-06-01 Space systems Fluid characteristics, sampling and test methods Part 3: Nitrogen Systmes

8、 spatiaux Caractristiques, chantillonnage et mthodes dessai des fluides Partie 3: Azote BSISO158593:2004ii BSISO158593:2004ISO 15859-3:2004(E) iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of

9、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 that committee. International organizations, governmental and non-governmental,

10、 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 in accordance with the rules given in the ISO/IEC Directives, Part 2. The main t

11、ask 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 Standard requires approval by at least 75 % of the member bodies casting a vote. Attent

12、ion 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. ISO 15859-3 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 14,

13、 Space systems and operations. ISO 15859 consists of the following parts, under the general title Space 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 propell

14、ant Part 7: Hydrazine propellant Part 8: Kerosine propellant Part 9: Argon Part 10: Water Part 11: Ammonia Part 12: Carbon dioxide Part 13: Breathing air BSISO158593:2004ISO 15859-3:2004(E) iv Introduction Fluid operations at a spaceport or launch site may involve a number of operators and supplier/

15、customer interfaces, from the fluid production plant to the delivery to the launch vehicle or spacecraft. 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 equi

16、pment. The fluid composition limits specified are intended to define the purity and impurity limits of 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 metho

17、ds for verification of the fluid composition limits. BSISO158593:2004INTENRATIONAL TSANDADR IS-95851 O3:(4002E)1Space systems Fluid characteristics, sampling and test methods Part 3: Nitrogen 1 Scope This part of ISO 15859 specifies limits for the composition of nitrogen and establishes the sampling

18、 and test requirements applicable for the verification of nitrogen composition. This part of ISO 15859 is applicable to nitrogen, used in both flight hardware and ground facilities, systems and equipment, of the following types and grades of nitrogen. Type I: gaseous Grade A: purging/pressurizing, G

19、rade B: crew breathing, Grade C, Grade F, Grade J; Type II: liquid Grade A: purging/pressurizing, Grade B: crew breathing, Grade C, Grade F. This part of ISO 15859 is applicable to influents only within the specified limits herein. This part of ISO 15859 is applicable to any sampling operation requi

20、red 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 Normative references The following referenced documents are indispensable for the applic

21、ation 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 systems Fundamentals and vocabulary BSISO158593:2004ISO 15859-3:2004(E) 2 3 Terms and d

22、efinitions For the purposes of this document, the terms and definitions given in ISO 9000 and the following apply. 3.1 direct method method of measuring fluid purity by direct means as opposed to the indirect method NOTE A measurement device or analyser can be used as a direct means for measuring th

23、e fluid purity. 3.2 indirect method method of measuring fluid purity by indirect means, which consists in measuring the total volume fraction or mass fraction (in %) of aggregate impurities and subtracting this total from 100 % 3.3 total hydrocarbon content (as methane) single carbon atom equivalent

24、 3.4 verification test analysis performed on the fluid in the container, or a sample thereof, which is representative of the supply, permitting the verification of fluid composition limits 4 Chemical composition Unless otherwise provided in an applicable technical specification, the composition of n

25、itrogen delivered to the flight vehicle interface shall be in accordance with the limits given in Table 1 when tested in accordance with the applicable test methods. BSISO158593:2004ISO 15859-3:2004(E) 3Table 1 Composition limits Limits Type I and Type II (gaseous and liquid) Type I Component Grade

26、A Grade B Grade C Grade F Grade J Nitrogen Volume fraction, %, min.a 99,5 f 99,995 99,9 99,999 Water l/l, max.26,3 11,5 5,7 15 10 Total hydrocarbons as methane (CH 4 ) l/l, max. 58,3 5,0 g5,0 25 Oxygen l/l, max. 5 000 50 20 1 000 5 Hydrogen l/l, max. e e 0,5 e Argon bl/l, max. e 20 2,0 e Carbon diox

27、ide bl/l, max. e 5,0 5,0 e Carbon monoxide bl/l, max. e 5,0 5,0 e Aromatic hydrocarbons as benzene bl/l, max. 0,5 Halogenated hydrocarbons bl/l, max. 1,0 Chlorinated hydrocarbons bl/l, max. 0,1 Nitrous oxide bl/l, max. 1,0 Odour None Particulate matter cmg/l, max. 1,0 1,0 Total impurities dl/l, max.

28、 5 000 100 50 1 000 10 a Nitrogen (in percent) includes trace quantities of neon, helium, and small amounts of argon. b If required by use. c Applies only to Type II (liquid) nitrogen. d Sum of all percentages of water, hydrocarbons, oxygen, hydrogen, and if applicable, carbon monoxide, carbon dioxi

29、de, and argon. e No limit for this grade. f By indirect method 99,99 % or by direct method 95,0 %. g For environmental-control-and-life-support-system (ECLSS) ground test only.5 Procurement Nitrogen types and grades specified in Clause 1 should be procured in accordance with an applicable national s

30、tandard. BSISO158593:2004ISO 15859-3:2004(E) 4 6 Fluid sampling CAUTION Gaseous nitrogen is an asphyxiant. Human contact with liquid nitrogen will result in severe injury. Care should be taken in the handling and storage of liquid nitrogen to prevent contact with the human body. Care should also be

31、taken to prevent high concentrations of gaseous nitrogen in confined spaces. 6.1 Plan In order to ensure that the fluid composition complies with the 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 spac

32、e 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 the sampling points, the sampling procedures, the sampling frequency, the sample size, the number of samples,

33、the test methods, and the responsibilities of any involved operator. 6.2 Responsibility for sampling Unless otherwise provided in an applicable technical specification, the nitrogen delivered to the flight vehicle interface shall be sampled and verified by the supplier responsible for providing the

34、nitrogen 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 directed by the customer. 6.3 Sampling points Unless otherwise specified, sampling shall be conducted at the fluid storage site

35、 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. 6.5 Sample size The quantity in a single sample container shall be sufficient to perform the analysis for the limiting characterist

36、ics. If a single sample does not contain a sufficient quantity to perform all of the analyses for the required quality verification 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 s

37、ample per storage container; b) any number of samples agreed upon by the supplier and the customer. BSISO158593:2004ISO 15859-3:2004(E) 56.7 Storage container Unless otherwise provided by the applicable sampling plan, the fluid storage container shall not be refilled after the sample is taken. 6.8 G

38、aseous samples Gaseous samples shall be a typical specimen from the gaseous nitrogen supply. Samples shall be obtained in accordance with one of the following. a) By filling the sample container and storage containers at the same time, on the same manifold, and under the same conditions and with the

39、 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 between the supply and the sample containers. (Suitable valves are permissible.) For safety reasons, the sample container and sampling sy

40、stem 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 pressure regulation to prevent over-pressurizing this equipment. 6.9 Liquid samples (vaporized) Vaporized

41、liquid samples shall be a typical specimen from the liquid nitrogen supply. Samples shall be obtained by flowing liquid from the supply container into or through a suitable container in which a representative liquid sample is collected and then completely vaporized. 6.10 Rejection When any sample of

42、 the fluid tested in accordance with Clause 7 of this part of ISO 15859 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 the customer. 7 Test methods 7.1 General The supplier will ensure

43、 by standard practice, the quality level of nitrogen. If required, alternate test methods are described in 7.3 to 7.14. Other test methods not listed in this part of ISO 15859 are acceptable if agreed upon between the supplier and the customer. These tests are a single analysis or a series of analy

44、ses 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 as agreed upon between supplier and the customer. Tests may be perform

45、ed 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 nitrogen. 7.2 Parameters of analysis The parameters for analytical techniques contained in 7.3 to 7.14

46、 are the following: a) purity and impurity contents shall be expressed as a percentage by volume (volume fraction, %) unless otherwise noted; BSISO158593:2004ISO 15859-3:2004(E) 6 b) calibration gas standards containing the applicable gaseous components may be required to calibrate the analytical in

47、struments used to determine the limiting characteristic levels of the 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 shall be operated in accordance

48、 with the manufacturers instructions. 7.3 Nitrogen purity The nitrogen purity shall be determined by one of the following procedures. a) By determining the quantity of the aggregate impurities using the methods in 7.4 to 7.14. The purity of nitrogen is the value obtained when this quantity of aggreg

49、ate impurities, expressed as a volume fraction (%), is subtracted from 100. b) By determining the aggregate of all impurities by mass spectrometer. The percentage of nitrogen is the value obtained when the aggregate, expressed as a volume fraction (%), is subtracted from 100. c) By a gas chromatography method which uses a 5 zeol