SAE-AIR-825-5A-2003.pdf
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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2003 SAE International All rights reserved. No part of this publication may
3、 be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER:Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA) Fa
4、x: 724-776-0790 Email: custsvcsae.org SAE WEB ADDRESS:http:/www.sae.org AEROSPACE INFORMATION REPORT AIR825/5 REV. A Issued2002-03 Revised2003-03 Superseding AIR825/5 Liquid Oxygen Systems FOREWORD This document is one of a set of related documents. These documents comprehensively address the “Intro
5、duction to Oxygen Equipment for Aircraft“, and are referred to as slash (/) documents, rather than chapters. The documents may be obtained as a set or individually. As the field of oxygen systems for aircraft has evolved, it became cumbersome for one document to cover the full range of subject matte
6、r. The reader who is seeking overall familiarity with oxygen systems for aircraft should read all of these documents that combine to form a general reference to oxygen systems. The reader who is familiar with oxygen systems for aircraft may want to obtain only the slash documents that pertain to top
7、ics that are of specific interest. The document set is written as an introductory level, suitable for anyone who would like to understand the basics of oxygen systems in aircraft, and specifically for the engineer who has just recently been assigned to aircraft oxygen systems. Many of these document
8、s point the reader toward more detailed treatments located in other SAE documents. TABLE OF CONTENTS 1.SCOPE.3 2.REFERENCES.3 2.1Applicable Documents .3 2.1.1SAE Publications .3 2.1.2U.S. Government Publications.3 2.1.3NFPA Publications .3 2.2Related Publications 4 2.3Definitions 4 3.LIQUID OXYGEN (
9、LOX).4 3.1LOX Properties 5 Copyright SAE International Provided by IHS under license with SAELicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 01:59:51 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AIR825/5 Revision A - 2 - TABLE OF C
10、ONTENTS (Continued) 3.2LOX Converters and Ground Servicing Equipment .5 3.2.1LOX Converter Assembly.8 3.2.2LOX Ground Servicing Equipment.12 3.3Precautionary Measures 16 3.3.1Possible Injury from Cold .16 3.3.2Clothing and Protective Equipment16 3.3.3Clothing Safety Measures16 3.3.4Treatment for LOX
11、 Contact 16 3.3.5Precautions on Transferring LOX.16 3.3.6Material in Contact with LOX16 3.3.7Ground Surfaces in Transferring LOX17 3.3.8Electrical Grounding Requirements17 3.3.9Lubricants in LOX.17 3.3.10Storage Requirements of LOX .17 3.3.11Location of Storage Containers17 3.3.12Vacuum Failure 17 3
12、.4Comparison of Liquid Versus Gaseous Oxygen 18 3.4.1Advantages of LOX18 3.4.2Disadvantages of LOX .19 3.5Design Issues for Aircraft Installation.20 3.5.1Oxygen System Sizing.20 3.5.2Heat Exchanger Requirements20 3.5.3Tubing Requirements.21 3.5.4Pressure Relief Concerns 21 3.5.5Recharger Outlets21 3
13、.5.6Purging and Cleaning LOX Converters and Supply Equipment.22 3.5.7Other LOX System Features Necessary for Maintenance and Safety.22 4.NOTES22 4.1Keywords .22 Copyright SAE International Provided by IHS under license with SAELicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale,
14、03/05/2007 01:59:51 MSTNo reproduction or networking permitted without license from IHS -,-,- SAE AIR825/5 Revision A - 3 - 1.SCOPE: This Aerospace Information Report provides general information to aircraft designers and engineers, regarding LOX, its properties, its storage and its conversion to ga
15、s. Much useful information is included herein for aircraft designers regarding important design considerations for a safe and effective installation to an aircraft. The associated ground support equipment needed to support operations of LOX equipped aircraft is also discussed. It is important to rea
16、lize that LOX equipped aircraft cannot be supported unless this support infrastructure is also available. A significant part of this document will address the specific advantages, disadvantages and precautions relating to LOX systems. These are important issues that must be considered in deciding wh
17、ich oxygen system to install to the aircraft. Also, many commercial and military aircraft use aeromedical LOX equipment that is mostly portable equipment. Aeromedical LOX equipment is not addressed herein as it is beyond the scope of this document. 2.REFERENCES: 2.1Applicable Documents: The followin
18、g publications form a part of this document to the extent specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and refe
19、rences cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1SAE Publications: Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. AS8010Aviators B
20、reathing Oxygen Purity Standard 2.1.2U.S. Government Publications: Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. MIL-PRF-27210Oxygen, Aviators Breathing, Liquid and Gas 2.1.3NFPA Publications: Available from National Fire Protection
21、Association, 11 Tracy Drive, Avon, MA 02322. NFPA Standard No. 401 B Copyright SAE International Provided by IHS under license with SAELicensee=IHS Employees/1111111001, User=listmgr, listmgr Not for Resale, 03/05/2007 01:59:51 MSTNo reproduction or networking permitted without license from IHS -,-,
22、- SAE AIR825/5 Revision A - 4 - 2.2Related Publications: The following publications are provided for information purposes only and are not a required part of this SAE Aerospace Technical Report. MIL-D-19326Design and Installation of Liquid Oxygen Systems in Aircraft,General Specification for TR-56-2
23、60Air Force Handbook of LOX Systems, Volumes I that is, the filler valve assembly and the build-up and vent valve assembly. In portable converter designs, these assemblies may be part of the converter assembly. Most designs that are available now combine the functions of the two assemblies into one
24、unit. 3.2.1.6Converter Vacuum: The principle part of the converter is a vacuum insulated container. It consists of an inner and an outer shell with an evacuated air space between the two walls. Connections for filling and removing the LOX, and for venting the gaseous oxygen are provided between the
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