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 there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2015 SAE International All rights reserved. No part of this p
3、ublication may 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/MA2001B AEROSPACE STANDARD MA2001 (ISO 6771) REV. B Issued 1981-07 Revised 1993-0
5、6 Reaffirmed 2015-08 Aerospace Fluid Systems and Components - Pressure and Temperature Classifications RATIONALE MA2001B has been reaffirmed to comply with the SAE five-year review policy. FOREWORDAerospace fluid systems and components are generally designed and marked for a specific fluid pressure
6、and temperature type. The operating pressures listed are selected from ISO 2944 as far as practical.1. SCOPE AND FIELD OF APPLICATION:This document establishes the temperature types and pressure classes that are commonly used in aerospace fluid systems.2. REFERENCES:2.1 U.S. Government Publications:
7、Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.ISO 2944 Fluid Power Systems and Components-Nominal PressuresSAE INTERNATIONAL MA2001B Page 2 of 4 3. TEMPERATURE CLASSIFICATIONS:System operating temperature ranges shall be classified as
8、 follows (see Table 1):TABLE 1 - Temperature Type (C)4. NOMINAL PRESSURE CLASSIFICATIONS:Nominal pressures shall be classified as follows (see Table 2):TABLE 2 - Nominal Pressure Classes kPa (bar)PREPARED BY SAE COMMITTEE G-3,AEROSPACE COUPLINGS, FITTINGS, HOSE, AND TUBING ASSEMBLIESSAE INTERNATIONA
9、L MA2001B Page 3 of 4 APPENDIX AISO/DIS 6771 AEROSPACE SYSTEM PRESSURES AND TEMPERATURESA.1 ASSIGNMENT:At the fifth meeting of ISO/TC 20/SC 10 in Paris in October 1976, the U.S. agreed to prepare a standard for fluid system pressures and temperatures.A.2 BACKGROUND:Initially, the proposal was discus
10、sed under a proposed specification for fittings (SC 10 - N.53, N.93). In accordance with SC 10 resolution No. 33, the subject proposal was then drafted as a separate document (SC 10 - N.203) because of its applicability to other areas.Revision A changed the nominal pressure classes 10 000 and 20 000
11、 kPa to 10 500 and 21 000 kPa respectively. The 10 000 and 20 000 kPa classes follow the ISO 2944 Renard Series for nominal pressures but would require redesign and changes to the currently used 1500 and 3000 psi hydraulic system components if they were to be used in metric systems. Revision A limit
12、s the changes to the fittings of the 1500 and 3000 psi components, and will avoid changes to wall thicknesses, bore dimensions, etc., allowing such components to be used in metric systems.Revision B revises classes C and F similar to B and D of Revision A. It also adds 14 000, 35 000 and 56 000 kPa
13、classes, accomodating through 8000 psi operating and all combinations for return pressures at a 1:2 ratio.A.3 ACCEPTED STANDARDS, NATIONAL, INTERNATIONAL:The temperature ranges are fairly common to European and U.S. aircraft fluid systems specifications. The pressure ranges proposed in the reference
14、d documents are selected from ISO 2944, pr EN2245 (AECMA) and MIL-H-5540 (U.S.).SAE INTERNATIONAL MA2001B Page 4 of 4 TABLE 1AA.4 APPROVAL STATUS:The N.203 proposal was accepted by SC 10 at the 1977 Berlin meeting with changes as shown in N.261. The countries represented at the meeting: France, Germ
15、any, UK, USA. The N.261 document was coordinated in TC20 as DIS 6771, which resulted in disapprovals from Czechoslovakia and the USSR. Comments were received from Germany F. R. All suggested changes were discussed by ISO/TC20 /SC10. The agreed on changes are shown in this specification. This metric Aerospace Standard is the equivalent of ISO 6771.ISO 6771 was published in 1981.
