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/AIR1273B AEROSPACE INFORMATION REPORT AIR1273 REV. B Issued 1972-08 Reaffirmed 20
5、06-05 Revised 2015-07 Superseding AIR1273A Identification and Coding of Fluid and Electrical Piping System Functions RATIONALE Reference documents deleted, titles of some documents altered and additional document referenced. 1. SCOPE This SAE Aerospace Information Report (AIR) establishes a positive
6、 identification of the functions and, if applicable, the hazards and direction of flow of pipe, hose, tube, or electrical conduit lines. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent specified herein. The latest issue of SAE publications
7、 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 references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes a
8、pplicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org. AS478 Identification Mark
9、ing Methods AS33681 Strap, Tiedown, Electrical Components, Identification, Adjustable, Self-Clinching, Plastic, Type II, Class 1 2.1.2 Military and Federal Publications Available from DODSSP, Subscription Services Desk, Building 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094. MIL-STD-1247 Marki
10、ngs, Functions, and Hazard Designations of Hose, Pipe, and Tube Lines for Aircraft, Missile, and Space Systems MIL-T-9906 Tape - Aerospace VehicleTubing Identification Marker SAE INTERNATIONAL AIR1273B Page 2 of 3 FED-STD-595 Colors used in Government Procurement MS21919 Clamp, Loop Type, Cushioned,
11、 Support 2.1.3 NAS Publications Available from Aerospace Industries Association, 1000 Wilson Boulevard, Suite 1700, Arlington, VA 22209-3928, Tel: 703-358-1000, www.aia-aerospace.org. NAS1411 Band, Marker, Blank (Aluminum and CRES) 2.2 Definition As referred to herein, lines include any pipe, hose,
12、tube, or duct used to convey liquids or gases. It also includes any conduit used to contain electrical wires or cables. Accessories such as pipe covering are considered as parts of the line. 3. GENERAL Properly and judiciously applied, line identification can promote safety, expedite training, lesse
13、n error in operation, and facilitate servicing. Location, temperature and environmental conditions dictate the proper identification media, if any, that can be applied. However, care must be used to prevent the selection of an identification method that will contribute to an unsafe condition. Use of
14、 tapes, tags, or bands in engine compartments or other critical system areas where they may cause trouble, should they become detached, should be avoided. Certain features of line identification have been subject to International Agreements. In addition, the references at the end of this AIR should
15、be consulted for information on specific applications and limitations of requirements herein specified. 4. DESIGNATION OF FUNCTION As applicable, the following functions of a line may be identified: a. Contained medium (e.g., Oil, Fuel, Propellant, Electric, etc.) b. Direction of Flow c. Instrument
16、Line d. Hazard e. Pressure f. Fire Control g. Temperature (e.g., Cold Lines, flowing medium is below 0 C (32 F) and Hot Lines, surface temperature ranges above 74 C (165 F) h. Electrical characteristics (e.g., Voltage, Polarity, Frequency, etc.) i. Supplementary Information (e.g., Drain, Nozzle Open
17、, Flap Up, etc.) SAE INTERNATIONAL AIR1273B Page 3 of 3 5. IDENTIFICATION MEDIA a. Tapes (Ref. MIL-T-9906) of nonmetallic material which completely encircle the line may be used subject to limitations of temperature, environment, or location in the system. These tapes should incorporate colors, symb
18、ols and lettering. b. Bands (Ref. NAS1411) which are metallic and include a tangslot or other bandlock may be used in environments where the nonmetallic tapes are not suitable. A small spot weld may be applied to the folded back tang for additional security. Bands (Ref. AS33681) which are of plastic
19、, adjustable, and self-clinching are often used on cables or wiring harnesses for the dual purpose of identification and bundling. c. Tags generally have usage dependent upon type and method of application. The conventional metallic or nonmetallic plate is affixed to the line by means of wire or str
20、ing as a temporary method. This method of application should not be used except for temporary information and should be removed immediately after permanent identification has been applied or the part is installed. Preferably, these tags should be limited to items prior to final system installation.
21、Another use of tag is what would be commonly considered a clamp. A clamp such as MS21919 (with the cushion removed in some cases) may have all function marking applied to it. d. Words and symbols permanently marked directly on the line. This is only practical on metal tubes or conduit and care must
22、be taken to assure that the marking is visible in the assembled position. A suitable method of application should be specified and utilized (see AS478). The method of marking will generally be the same as that for part number identification, in any case a non-harmful method must be specified. e. Col
23、ors and symbols using suitable paints, dyes, color anodize, etc., which have no harmful effect upon the lines may be used. This type of identification is suitable in such places as engine compartments or other critical system areas where tapes, tags, or bands may have a deleterious effect (e.g., bei
24、ng drawn into engine intake). Disconnects for engine build-ups (EBUs) which, when required, may be marked with a solid band of international orange paint. This method is also commonly used for large diameter lines where environmental conditions will permit. Hue, value, and chroma should be in accord
25、ance with FED-STD-595. Color bands, combinations of color stripes and symbols (usually applied with stencils) have been standardized in MIL-STD-1247 which also gives environmental limitations. f. Continuous marking (paint, dye, or ink) by the use of wire marking machines may be used for electrical w
26、ires or small tubing. Flexible tubing with molded-in color may have a significant identification conveyed by the particular colors. 6. NOTES 6.1 A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have bee
27、n made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications nor in documents that contain editorial changes only. PREPARED BY SAE COMMITTEE E-25, GENERAL STANDARDS FOR AEROSPACE AND PROPULSION SYSTEMS
