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 theref
2、rom, 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 InternationalAll rights reserved. No part of this publi
3、cation 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: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/www.sae.org/technical/standards/ARP780BAEROSPACERECOMMENDED PRACTICEARP780 REV. BIssued 1963-05Revised 1996-07Reaffirmed 2015
5、10Environmental Systems Schematic SymbolsRATIONALEARP780B has been reaffirmed to comply with the SAE five-year review policy.TABLE OF CONTENTS1. SCOPE . 21.1. Purpose. 22. REFERENCES 23. SYMBOLS USE. 23.1 General Schematic Organization. 23.2 General Symbol Features . 34. SYMBOLS. 34.1 Heat Exchange
6、rs. 44.2 Rotating Components 54.3 Plumbing and Lines. 74.4 Valves . 94.5 Controls and Sensors114.6 Miscellaneous .125. COMBINED OR SPECIAL SYMBOLS.146. EXAMPLE SCHEMATIC .17APPENDIX A BIBLIOGRAPHY181. SCOPE:This SAE Aerospace Recommended Practice (ARP) provides symbols to schematically representaero
7、space vehicle environmental system components on functional flow schematic drawings andgraphical computerized output. The symbols are for use on simplified diagrams that provide basicinformation about an environmental system.Symbols are provided to represent basic types of components used in environ
8、mental systems. Simple variations of basic symbol types are provided. Words on the schematic diagram, specialsymbol codes, or symbols that combine basic symbol types (Section 5) can be used to augmentthe basic symbols when appropriate. Special or combined symbols not contained in this documentshould
9、 be defined on the schematic diagram.An example of a complete schematic is given in Section 6.A bibliography of other documents on environmental system symbols is found in Appendix A.1.1 Purpose:This document establishes graphical symbols for use on schematic flow diagrams of aerospacevehicle enviro
10、nmental systems. Use of this document is recommended for systems integrationpurposes. It is not intended to show detailed component functional information.2. REFERENCES:See Appendix A.3. SYMBOLS USE:Environmental system symbols are used on a schematic diagram to indicate functionalrelationships betw
11、een actual parts of the system. The schematic diagram facilitates tracing theoperation of the system. The diagram does not indicate actual physical size, shape, or location of asystem component, device, or part. The symbols are a shorthand method to relate graphically thefunction of a part of the sy
12、stem.3.1 General Schematic Organization:Recommendations for organizing component symbols on a schematic diagram, and generalrecommendations on schematic symbols for system plumbing and lines are provided.3.1.1 Symbols should be located on the schematic diagram so that components located towards thef
13、orward part of the vehicle are located on the left side of a schematic diagram, and symbols forcomponents located towards the aft part of the vehicle are on the right side of a schematicdiagram. This does not apply if general component location in a vehicle is unknown.3.1.2 Heavy, medium, and light
14、lines may be used on a schematic diagram to emphasize elements ofthe system diagram.SAE INTERNATIONAL ARP780B 2 OF 193.1.3 Fluid flow directions should be indicated with arrowheads on the schematic flow diagram.3.1.4 Fluid types should be written near symbols for ducting or plumbing lines, particula
15、rly if severaldifferent fluids are used.3.2 General Symbol Features:Several general features applicable to all symbols are recommended.3.2.1 Circles, rectangles, squares, triangles, and lines (curved and straight) are basic symbol shapes.Rotation of a symbol shape on a schematic diagram does not cha
16、nge the meaning of thesymbol.3.2.2 Alphabetical (letter) codes, related to the component name, are used to identify symbols havingthe same or similar shape. Complete component names or identifications on a schematicdiagram should be located in approximately the same location relative to the symbol t
17、o whichthey apply.3.2.3 The inlet and outlet flow locations should be indicated clearly for each symbol. Flow linesthrough a symbol should be used to prevent confusion if two or more different fluids enter orexit a component at two different locations (e.g., heat exchanger flow lines).3.2.4 Lines re
18、presenting sensor signals or intelligence data for controls should be drawn lightly. Thenumber of wires or lines actually used does not need to be indicated - a single line can be used.The type of sensor signal or intelligence data should be identified by words or alphanumericcodes.4. SYMBOLS:Symbol
19、s are presented in five general groupings, plus miscellaneous. The five groups are HeatExchangers, Rotating Components, Plumbing and Lines, Valves, and Controls and Sensors. Generally, symbol types are alphabetized within each group.Asterisks are used on some symbols in this report, but are not inte
20、nded for actual use. Instead, anidentifier or code letter or letters should be used, as noted on the following pages. The asterisk canbe omitted when appropriate.Arrowheads are not included on most symbols in this report. They should be used on theschematic flow diagrams to indicate fluid flow direc
21、tion between component symbols. Arrowheadsare found on some symbols in this report for clarity.SAE INTERNATIONAL ARP780B 3 OF 194.1 Heat Exchangers:FIGURE 1SAE INTERNATIONAL ARP780B 4 OF 194.2 Rotating Components:FIGURE 2SAE INTERNATIONAL ARP780B 5 OF 194.2 (Continued):FIGURE 3SAE INTERNATIONAL ARP7
22、80B 6 OF 194.3 Plumbing and Lines:FIGURE 4SAE INTERNATIONAL ARP780B 7 OF 194.3 (Continued):FIGURE 5SAE INTERNATIONAL ARP780B 8 OF 194.4 Valves:FIGURE 6SAE INTERNATIONAL ARP780B 9 OF 194.4 (Continued):FIGURE 7SAE INTERNATIONAL ARP780B 10 OF 194.5 Controls and Sensors:FIGURE 8SAE INTERNATIONAL ARP780B
23、 11 OF 194.6 Miscellaneous:FIGURE 9SAE INTERNATIONAL ARP780B 12 OF 194.6 (Continued):FIGURE 10SAE INTERNATIONAL ARP780B 13 OF 195. COMBINED OR SPECIAL SYMBOLS:FIGURE 11SAE INTERNATIONAL ARP780B 14 OF 195. (Continued):FIGURE 12SAE INTERNATIONAL ARP780B 15 OF 195. (Continued):FIGURE 13SAE INTERNATIONA
24、L ARP780B 16 OF 196. EXAMPLE SCHEMATIC:FIGURE 14SAE INTERNATIONAL ARP780B 17 OF 19PREPARED BY SAE COMMITTEE AC-9, AIRCRAFT ENVIRONMENTAL SYSTEMSSAE INTERNATIONAL ARP780B 18 OF 19APPENDIX ABIBLIOGRAPHYA.1 SAE AS1290, Graphic Symbols for Aircraft Hydraulic and Pneumatic Systems, 1987, SAECommittee A-6
25、A.2 ISO - 1219, Fluid Power Systems and Components - Graphic Symbols, 1977.A.3 ASHRAE Handbook of Fundamentals, Chapter 36 - Abbreviations and Symbols, 1985.A.4 MIL-STD-17B-2, Mechanical Symbols for Aeronautical, Aerospacecraft and Spacecraft Use, 23January 1963.A.5 ANSI Y32.10 - 1974, Graphic Symbols for Fluid Power Diagrams, 1974.A.6 ANSI Y32.2.4M-1984, Graphic Symbols for Heating, Ventilating, and Air Conditioning, 1984.A.7 DOD-STD-863B, Preparation of Wiring Data and System Schematic Diagrams, 17 March 1981.SAE INTERNATIONAL ARP780B 19 OF 19
