1、G=-%yi BSI 5M*k23 87 m 1624bb OLOL7L 7 m British Standard 5M23: 1987 IS0 12-1987 O (Superseding British Standard 4M 23) UDC 629.7 : 621.644 : .001.3 British Standards Institution. No part of this publication may be photocopied or otherwise reproduced without the prior permission in writing of BSI Br
2、itish Standard Aerospace Series: Specification for An identification scheme for pipelines IS0 title: Aerospace - Pipelines - Identification scheme Srie arospatiale. Un procd didentification pour les tuyauteries - Spcifications Luftraumser e. E in Er kennungsschema f r Rohr leitu ngen O Contents Nati
3、onal foreword Committees responsible Specification 1 Scope and field of application 2 Reference 3 Identification scheme 4 Markers 5 Location of markers Page Page I Tables Back cover 1 Pipe systems and symbols 2 2 Colorimetric values of colours 3 2 Figures 1 Typical applications of markers 2 Identifi
4、cation symbols and colours 4 5 3 4 National foreword This British Standard has been published under the direction of the Aerospace Standards Committee. It is identical with IS0 12-1987 Aerospace - Pipelines - Identification, published by the International Organization for Standardization (ISO) and s
5、upersedes British Standard 4M 23 : 1977, which is withdrawn. IS0 12 was produced as a result of international discussion in which the UK took an active part. The international standard supersedes IS0 12-1976, which has been withdrawn, and introduces the following technical changes: O (a) the scope a
6、nd field of application have been modified; (b) a symbol has been added for filtered air (see table 1 and figure 2); (c) the subclause on the supplementary identification marker (now 4.3) has been expanded. Terminology and conventions. The text of the international standard has been approved as suit
7、able for publication as a British Standard without deviation. Some terminology and certain conventions are not identical with those used in British Standards; attention is drawn especially to the following. The comma has been used as a decimal marker. In British Standards it is current practice to u
8、se a full point on the baseline as the decimal marker. Wherever the words International Standard appear, referring to this standard, they should be read as British Standard. Cross-reference International standard Corresponding British Standard IS0 3323-1976 British Standard M 49 : 1977 Specification
9、 for marking of hydraulic components (Identical) Compliance with a British Standard does not of itself confer immunity from legal obligations. O British Standards Institution f BSI 5M*23 7 Lb2Ybb9 0303972 9 British Standard 5M 23 : 1987 , Colours, The colours given in BS 381C Colours for - - - _Is -
10、 I identification, coding and special purposes that are suitable for use in accordance with 4.2.2 are as follows. oi Colour Blue Green Yellow Brown Orange Red Grey ES 381C number 166 218 309 41 2 592 538 63 1 Identification. Wiih reference to 4.4, the method of i identifying the marker for the hydra
11、ulic system, for example, is BS 5M 23/6. - I This International Standard lays down the requirements for a scheme to indicate, by appropriate marking, the functions or contents of rigid pipe assemblies in aircraft and spacecraft systems, but excluding those in aero-engines with the excep- tion of tho
12、se which connect directly to the airframe systems at their break points. These requirements may also be applied to hose assemblies, if . desired. Scope and field of application The purpose of the scheme is to provide the minimum iden- tification necessary for normal maintenance purposes. NOTE - Mark
13、ers used for the purpose of applying this identification scheme should not adversely affect the chemical or mechanical proper- ties of the pipes or conduits. 2 Reference IS0 3323, Aircraft - Hydraulic components - Marking to indicate fluid for which component is approved. 3 Identification scheme 3.1
14、 General 3.1 .I Where ambient temperatures permit, the scheme shall consist of markers fixed to the pipelines to indicate their func- tions or contents, to give due warning where the contents are dangerous and, when required, to indicate the direction of flow of the contents. Typical applications of
15、 the scheme are shown in figure 1. Any supplementary identification required should be separate and distinct from the lettering, symbols and colours specified in this International Standard. It is recommended that such sup- plementary identificatiqn should be by means of a number code see figure IdI
16、l. 3.1.2 Where ambient temperatures are too high to permit the use of mark,ers, the requirements of this International Standard shall be met as fully as possible. As a minimum requirement, one inscription in black letters, located in accordance with clause 5, shall be applied in such a manner that i
17、t remains legible throughout the temperature range imposed on the pipeline. ? ,7 7 2 3.2 Basic identification 3.2.1 Each rigid pipe in the pipe systems listed in table 1 shall be identified by a marker bearing the designation of the system, together with the appropriate symbol as described in table
18、1 and shown in figure 2. 3.2.2 Pipelines for replenishment, vents, pressure transmis- sion, priming and drains, or related functional equipment, shall be identified by the same marker as the main pipeline. Table 1 - Pipe systems and symbols Designation of pipe system Air conditioning (including cabi
19、n pressurizing) Battery activator Breathing oxygen Compressed gas Coolant De-icing Drinking water Electrical conduit Filtered air Fire protection Fuel Hydraulic Inerting Instrument air Lubrication Monopropellant Rain repellent Pneumatic Rocket catalyst Rocket fuel Rocket oxidizer Solvent Vacuum Wast
20、e water Water injection Symbol (see figure 2) Description Dot pattern Ellipse with radiating lines Rectangle Broad diagonal stripe Broad undulations Triangle 11 “H20“ Flash of lightning “NEC“ Horizontal diamond Four-pointed star Circle Pipe crossII Zig-zag linezi Square 1 Block T Falling raindrops “
21、X“21 Three vertical stripes2. Four-pointed star inside crescent Crescent Horizontal stripes Wavy line21 Chain21 Chevron No. 11 24 10 16 9 13 25 17 27 12 1 6 19 8 5 21 22 7 15 3 2 20 23 26 14 1) Alternate symbols to be staggered , 2) Continuous partern e O -3 -)-i BSI 5M*it23 87 U 1b24bb9 0301973 O U
22、 British Standard 5M 23 : 1987 I 0,188 0,510 0,386 0,356 0,316 0,363 I I 0,488 3.2.3 The contents of pipelines other than those listed in table 1 (e.g. toilet) shall, where necessary, be identified by markers bearing the name of the function or contents only, 3.3 Supplementary identification 3.3.1 S
23、ub-division of basic identification Where necessary for the further identification of a pipeline, a basic identification shall be sub-divided by means of additional words, describing the specific function or contents of the sub- division (eng. “Methyl bromide“, “Auto-pilot“), which may be on a secon
24、d, narrower marker adjacent to the basic identifica- tion marker or interposed between the words on the latter see figure leil. . 3.3.2 Warning symbol Markers bearing the skull and crossbones symbol, as shown in figure 2 (No. 141, shall be applied adjacent to the basic iden- tification markers on al
25、l pipelines where it is necessary to in- dicate that the contents of the pipelines are considered to be dangerous to maintenance personnel. 3.3.3 Direction of flow When required, the direction of flow of the contents of a pipeline shall be indicated by means of additional markers bearing arrows, as
26、shown in figure 2 (No. 18). 4.2.2 If desired, the background to the written description may be coloured, in which case the colouring shall be as shown in figure 2. The colours shall have the colorimetric values given in table 2 and shall not be of such densiy as to obscure the lettering. Where there
27、 is more than one colour, the widths of the bands shall be approximately equal. Table 2 - Colorimetric values of colours Colour I Chromaticity coordinates and luminance factor under CIE* Standard Illuminant B (A) Blue (BI Green (Cl Yellow (DI Brown (E) Orange (Fi Red (G) Grey 0,201 0,366 0,483 0.506
28、 0,620 0,645 0,342 - 8.8 14.3 62.3 3.3 16.2 7.7 231 * on Illumination) Commission internationale de lclairage (International Commission 4.3 Supplementary identification marker 4.3.1 A marker used for supplementary identification pur- poses (see 3.3) shall be not less than 12 mm wide and shall bear e
29、ither 4 Markers 4.1 General Except as laid down in 4.2.2 and 4.3.2, all lettering and sym- bols shall be printed in black upon a white or equivalent background. If desired, alternate lines or, where appropriate, pairs of lines of the lettering may be inverted. 4.2 Basic identification marker 4.2.1 T
30、he basic identification marker shall be not less than 25 mm wide and shall bear a) the appropriate symbol, at regular intervals or forming a continuous pattern (see figure 2) in a band approximately 7 mm wide on one margin of the marker; b) the designation of the pipe system, in lettering not less t
31、han 3 mm high, repeated at regular intervals such that the gap between the lines is not more than twice the height of the lettering, on the portion of the marker not used for the svmbol. a) the appropriate symbol at regular intervals, as shown in figure 2 (Nos. 14 and 181, or b) the desired inscript
32、ion, in lettering not less than 2 mm high, repeated at regular intervals such that the gap between the lines is not more than twice the height of the lettering. 4.3.2 Where a supplementary identification marker is used to indicate the type of fluid for which a hydraulic system pipeline is approved,
33、the inscription shall be the name of the particular type of fluid as specified in IS0 3323. Where IS0 3323 makes provision for the use of a colour to indicate a particular type of fluid, the background to the written inscription may be coloured, if desired, in which case the colour used shall be tha
34、t specified in IS0 3323 for that particular type of fluid. 4.4 Identification For purchasing and handling purposes, the markers shall be identified by the number of the relevant national standard together with the appropriate symbol number as shown in table 1 and/or figure 2. O BSI 5M*Z3 87 162LIbb9
35、 0101974 2 W British Standard 5M 23 : 1987 5 Location of markers Markers shall be located at both ends of a pipeline component and at intervals along the pipeline. Identification points shall be selected so that when the pipeline is installed at least one marker is located adjacent to each servicing
36、 point and inspec- tion door. Where a length of pipeline is less than 600 mm and the installed pipeline may be readily traced, only one marker need be used. To preclude over-application of markers, discretion may be exercised when implementing these requirements. Where visi- bility is unrestricted o
37、ver a one-piece pipeline of considerable length, the markers need only be placed at intervals necessary to ensure that at least one marker is visible and recognizable from any observation point along the pipeline. FUEL PROTKTION a) Fuel c) Compressed gas - warning bl Fire protection - methyl bromide
38、 Constructors marking (A) IC) 2 dl Hydraulic - with supplementary identification el Positioning of markers showing alternative methods of giving supplementary information (see 3.3.1) NOTES 1 The letters above the markers are the serial letters of the colours as given in table 2. 2 The supplementary
39、identification marker may be located on either side of the basic identification marker (see 3.3 1 i Figure 1 - Typical applications of markers r 4 BSI 5M*ir23 87 1624669 0303975 4 W British Standard 5M 23 : 1987 ( F) FUEL 1 LUBRICATION m IUBRICATiN I LUBRICATION LUBRICATION 5 COOLANT COOLANT COOLANT
40、 COOLANT COOLANT 9 (G) 13 1 2 3 4 (Ai C) 6 (BI BREATHING OXYGEN BREATH I NG 10 (C) (BI 14 15 Warning symbol (E) (Al 7 (DI (GI 11 (E) IWSTR MENT INSTR MEN1 INST MENJ FIRE + PROTKTIOH 4 PROTECTION 12 e PROTKTIOH 0 FIRE (DI (E) 16 17 1 The letters above the markers are the serial letters of the colours
41、 as given in table 2. The numbers below the markers are the symbol numbers for identification purposes. 2 The symbol may be ocated on either margin of a marker see 4.2.la)l. Figure 2 - Identification symbols and colours British Standard 5M23: 1987 18 Direction of flaw IG) (E) (GI 23 (E) (6) 1s (Cl (
42、GI BSI 5MP23 87 E Lb24669 OLOL97b b S 24 20 21 (A) (6) (FI (A) 25 26 22 (6) (FI 27 NOTES 1 The letters above the markers are the senal letters of the colours as given in table 2. The numbers below the markers are the symbol numbers for identification purposes. 2 The symbol may be located on either m
43、argin of a marker see 4.2.la)l. Figure 2 (concluded BSI 5M*23 7 W lb24bb7 0303977 B W Publication referred to See national foreword. BSI 5M*K23 87 m 3624bb9 0303978 T M Date of issue Amd. No. British Standard Text affected -Ag %2 4-48! 5M 23 : 1987 IS0 12-1987 This British Standard, having been prep
44、ared under the direction of the Aerospace Standards Committee, was published under the authority of the Board of BSI and comes into effect on 30 November 1987 O British Standards Institution, 1987 ISBN O 580 16256 7 The following BSI references relate to the work on this standard: Committee referenc
45、e ACE/-/I Draft for comment 85/79720 DC British Standards Institution. Incorporated by Royal Charter, BSI is the independent national body for the preparation of British Standards. It is the UK member of the International Organization for Standardization and UK sponsor of the British National Commit
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47、obtained from the Enquiry Section, BSI, Milton Keynes MK14 6LE, telephone 0908 221 166, telex 825777. Copyright. Users of British Standards are reminded that copyright subsists in all BSI publications. No part of this publication may be reproduced in any form without the prior permission in writing
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