BS ISO 22538-1-2007 Space systems Oxygen safety Design of oxygen systems and components《航空航天系统 氧气安全性 氧气系统及组件的设计》.pdf
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1、BRITISH STANDARDBS ISO 22538-1:2007Space systems Oxygen safety Part 1: Design of oxygen systems and components ICS 49.140g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g4
2、4g42g43g55g3g47g36g58BS ISO 22538-1:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2007 BSI 2007ISBN 978 0 580 53674 8National forewordThis British Standard is the UK implementation of ISO 22538-1:2007.The UK participation in
3、 its preparation was entrusted to Technical Committee ACE/68, Space systems and operations.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible
4、for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsReference numberISO 22538-1:2007(E)INTERNATIONAL STANDARD ISO22538-1First edition2007-09-01Space systems Oxygen safety Part 1: Design
5、of oxygen systems and components Systmes spatiaux Scurit des systmes doxygne Partie 1: Conception des systmes doxygne et leurs composants BS ISO 22538-1:2007ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms, definitions and abbreviated terms . 1 3.1 Terms and definitions
6、. 1 3.2 Abbreviated terms 2 4 Design approach. 2 4.1 General. 2 4.2 Design specifications. 2 4.3 Design reviews 2 4.4 Component and system testing 4 5 Design for high-pressure and high-temperature gaseous oxygen systems 4 5.1 Design features . 4 5.2 Materials guidelines 5 5.3 General design guidelin
7、es . 6 5.4 Specific system design guidelines . 7 6 Design for cryogenic oxygen systems.10 6.1 General. 10 6.2 Materials guidelines 11 6.3 General system installation guidelines 11 6.4 Design specifications. 11 6.5 Hazard considerations . 12 6.6 Component hardware and systems design considerations. 1
8、2 6.7 Electrical design guidelines 12 7 Standard practices 13 7.1 Liquid-oxygen vessels . 13 7.2 Piping systems 13 7.3 Liquid-oxygen piping systems 14 7.4 Gaseous oxygen piping systems 15 7.5 Systems connections and joints. 15 7.6 Components 16 Bibliography . 20 BS ISO 22538-1:2007iv Foreword ISO (t
9、he 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 body interested in a subject for which a technical commit
10、tee 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 Electrotechnical Commission (IEC) on all matters of electrotech
11、nical 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 by the technical committees are circulated to the member
12、 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 rights. ISO shall not be held responsible for identifying
13、 any or all such patent rights. ISO 22538-1 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee SC 14, Space systems and operations. ISO 22538 consists of the following parts, under the general title Space systems Oxygen safety: Part 1: Design of oxygen systems a
14、nd components Part 2: Selection of metallic materials for oxygen systems and components Part 3: Selection of non-metallic materials for oxygen systems and components Part 4: Hazards analyses for oxygen systems and components The following parts are under preparation: Part 5: Operational and emergenc
15、y procedures Part 6: Facility planning and implementation BS ISO 22538-1:20071Space systems Oxygen safety Part 1: Design of oxygen systems and components 1 Scope This part of ISO 22538 describes a process for the design of oxygen systems and their components. This part of ISO 22538 applies equally t
16、o ground support equipment, launch vehicles and spacecraft. 2 Normative 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 (i
17、ncluding any amendments) applies. ISO 22538-2, Space systems Oxygen safety Part 2: Selection of metallic materials for oxygen systems and components ISO 22538-3, Space systems Oxygen safety Part 3: Selection of non-metallic materials for oxygen systems and components 3 Terms, definitions and abbrevi
18、ated terms 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 direct oxygen service service in which materials and components are in direct contact with oxygen during normal operations 3.1.2 indirect oxygen service service in which materials
19、 and components are not normally in direct contact with oxygen but might be as a result of a malfunction, operator error or process disturbance 3.1.3 oxygen-enriched atmosphere mixture (gas or liquid) that contains more than 25 volume percent oxygen 3.1.4 qualified technical personnel persons such a
20、s engineers and chemists who, by virtue of education, training or experience, know how to apply physical and chemical principles involved in the reactions between oxygen and other materials BS ISO 22538-1:20072 3.2 Abbreviated terms CDR critical design review EPR emergency procedures review FMECA fa
21、ilure modes and effects criticality analysis GOX gaseous oxygen LOX liquid oxygen ORI operational readiness inspection PCTFE polychlorotrifluoroethylene PDR preliminary design review PTFE polytetrafluoroethylene SSA/SR system safety analysis/safety review TRR test readiness review 4 Design approach
22、4.1 General Oxygen is chemically stable and a strong oxidizer that supports combustion. It is not shock sensitive and is not flammable. Oxygen is reactive at ambient conditions and its reactivity increases with increasing pressure, temperature and concentration. Before embarking on a new task, it is
23、 important that designers, customers and operators understand the risks associated with oxygen systems. 4.2 Design specifications Each new design project begins with specifications for the requested item. It is important that these specifications do not create an unnecessary risk for personnel or eq
24、uipment. Most materials are flammable in high-pressure oxygen. An oxygen system designer shall understand that oxygen, fuel and a source of ignition are all that is necessary to start and propagate a fire. Many materials are combustible in oxygen-enriched environments and reactivity is generally inc
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