1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1505:1998 The Europ
2、ean Standard EN 1505:1997 has the status of a British Standard ICS 91.140.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Ventilation for buildings Sheet metal air ducts and fittings with rectangular cross-section DimensionsThis British Standard, having been prepared under
3、the direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1998 BSI 1998 ISBN 0 580 29025 5 BS EN 1505:1998 Amendments issued since publication Amd. No. Date Text affected National foreword This British Standard is the En
4、glish language version of EN 1505:1997 published by the European Committee for Standardization (CEN). The UK participation in its preparation was entrusted to Technical Committee RHE/2, Air distribution and air diffusion, which has the responsibility to: aid enquirers to understand the text; present
5、 to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on req
6、uest to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of
7、the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. S
8、ummary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 3
9、6, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1505:1997 E EUROPEAN STANDARD EN 1505 NORME EUROPE ENNE EUROPA ISCHE NORM December 1997 ICS 91.140.30 Descriptors: Buildings, ventilation, air conditioning, ae
10、raulic pipes, accessories, rectangular form, metal plates, definitions, dimensions, dimensional tolerances English version Ventilation for buildings Sheet metal air ducts and fittings with rectangular cross-section Dimensions Ventilation des ba timents Conduits en to le et accessoires a section rect
11、angulaire Dimensions Lu ftung von Geba uden Luftleitungen und Formstu cke aus Blech mit Rechteckquerschnitt Mae This European Standard was approved by CEN on 25 October 1997. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Euro
12、pean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English
13、, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republi
14、c, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1505:1997 BSI 1998 Figure 1 Position of EN 1505 in the field of mechanical building services Foreword This European Standard has b
15、een prepared by Technical Committee CEN/TC 156, Ventilation for buildings, the secretariat of which is held by BSI. This standard is one of a series of standards for ductwork used for ventilation and air conditioning of buildings for human occupancy, and it has a parallel standard referring to dimen
16、sions of ducts with circular cross-section. The position of this standard in the field of mechanical building services is shown in Figure 1. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 19
17、98, and conflicting national standards shall be withdrawn at the latest by June 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
18、France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 3 EN 1505:1997 BSI 1998 Contents Page Foreword 2 Introduction 4 1 Scope 4 2 Normative references 4 3 Definitions and symbols 4 4 Dimensions and values f
19、or ducts 5 5 Dimensions for fittings 6 6 Tolerances and deviations 8 Annex A (informative) Examples of alternative designs of connections 9 Annex B (informative) Comments and notes to clause 5 9 Annex C (informative) Bibliography 10Page 4 EN 1505:1997 BSI 1998 Figure 2 Application of denominations f
20、or the nominal size 1) See annex C. Introduction This standard has been prepared by CEN/TC 156 to specify dimensions and tolerances for rectangular ducts and duct fittings used in ventilation systems. Dimension and tolerances for straight ducts given in this standard are in accordance with ISO 7807:
21、1983 1) concerning recommended sizes. The dimensions given for duct fittings are based on document EUROVENT 2/4 1) . 1 Scope This European Standard specifies dimensions of sheet metal air ducts and duct fittings with rectangular cross-section. It applies to ductwork used in ventilation and air condi
22、tioning systems in buildings subject to human occupancy. The wall thickness of ducts and fittings is not specified in this standard; strength and leakage are dealt with in prEN 1507. The corresponding standard for circular ducts is EN 1506. 2 Normative references This European Standard incorporates
23、by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references the subsequent amendments to or revisions of any of these publications apply to this European
24、Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. CR 12792, Ventilation for buildings Symbols and terminology EN 1506, Ventilation for buildings Ductwork. Circular sheet metal air ducts and duct fittings
25、Dimensions prEN 1507, Ventilation for buildings Ductwork Rectangular sheet metal air ducts Strength and leakage Requirements and testing 3 Definitions and symbols For the purposes of this standard, the definitions given in CR 12792, together with the following, apply. 3.1 nominal size reference dime
26、nsion used for designation, calculation and application of ducts and fittings. For ducts, the nominal size is the internal dimension of side a and side b, where a is the visible side (see Figure 2). The lengths of the sides of the smaller end of a transformation piece are denoted by c and d, where c
27、 is the visible side (see Figure 2) 3.2 effective length of fitting (l) length by which a fitting contributes to the overall length of the air distribution system 3.3 effective length of a straight duct (L) length by which a straight duct contributes to the overall length of the air distribution sys
28、tem 3.4 cross-sectional area (A c ) product of the side lengths a and b 3.5 duct surface area (A i ) product of the internal perimeter and the duct length 3.6 hydraulic diameter (d h ) for a rectangular duct, the diameter of a circular duct which will cause the same pressure drop at equal air veloci
29、ty and equal friction coefficients d h = 4 (cross-sectional area) internal perimeter 2 ab a + b 3.7 equivalent diameter (d e ) for a rectangular duct, the diameter of a circular duct which will cause the same pressure drop at equal air flow and equal friction coefficients 3.8 angle of a transformati
30、on piece (a) the larger angle between two opposite sides of a transformation piecePage 5 EN 1505:1997 BSI 1998 Table 1 Dimensions and values for ducts Side lengths mm 100 150 200 250 300 400 500 600 800 1000 1200 200 0,020 0,030 0,040 A c 133 171 200 d h 149 186 218 d c 0,60 0,70 0,80 A i 250 0,025
31、0,038 0,050 0,063 A c 143 188 222 250 d h 165 206 241 273 d c 0,70 0,80 0,90 1,00 A i 300 0,030 0,045 0,060 0,075 0,090 A c 150 200 240 273 300 d h 180 224 262 296 327 d c 0,30 0,90 1,00 1,10 1,20 A i 400 0,040 0,060 0,080 0,10 0,12 0,16 A c 160 218 267 308 343 400 d h 205 255 299 337 373 436 d e 1,
32、00 1,10 1,20 1,30 1,40 1,60 A i 500 0,075 0,10 0,13 0,15 0,20 0,25 A c 231 286 333 375 444 500 d h 283 331 374 413 483 545 d e 1,30 1,40 1,50 0,60 1,80 2,00 A i 600 0,090 0,12 0,15 0,18 0,24 0,30 0,36 A c 240 300 353 400 480 545 600 d h 307 359 406 448 524 592 654 d e 1,50 1,60 1,70 1,80 2,00 2,20 2
33、,40 A i 800 0,16 0,20 0,24 0,32 0,40 0,48 0,64 A c 320 381 436 533 615 686 800 d h 410 463 511 598 675 745 872 d e 2,00 2,10 2,20 2,40 2,60 2,80 3,20 A i 3.9 Deviation, tolerance 3.9.1 upper deviation algebraic difference between the maximum limit of size and the corresponding nominal size 3.9.2 low
34、er deviation algebraic difference between the minimum limit of size and the corresponding nominal size 3.9.3 tolerance difference between the upper deviation and the lower deviation. The tolerance is an absolute value without sign 4 Dimensions and values for ducts The dimensions for ducts, including
35、 the corresponding values of cross-sectional area (A c in m 2 ), hydraulic diameter (d h in mm), equivalent diameter (d e in mm) and duct surface area per metre length (A i in m 2 /m), are given in Table 1. The equivalent diameter d e is calculated using the following formula: d e =2 b ( p 22 n (1 +
36、 a/b) 1+n /(a/b) 3 ) 1/(n25) where n = 1/(1,05 logR e 2 0,45) Tolerances and deviations are given in clause 6.Page 6 EN 1505:1997 BSI 1998 Table 1 Dimensions and values for ducts (continued) Side lengths mm 100 150 200 250 300 400 500 600 800 1000 1200 1000 0,25 0,30 0,40 0,50 0,60 0,80 1,00 A c 400
37、 462 571 667 750 889 1000 d h 512 566 662 747 825 965 1090 d e 2,50 2,60 2,80 3,00 3,20 3,60 4,00 A i 1200 0,36 0,48 0,60 0,72 0,96 1,20 1,44 A c 480 600 706 800 960 1091 1200 d h 614 719 812 896 1049 1184 1308 d e 3,00 3,20 3,40 3,60 4,00 4,40 4,80 A i 1400 0,56 0,70 0,84 1,12 1,40 1,68 A c 622 737
38、 840 1018 1167 1292 d h 771 871 962 1125 1270 1403 d e 3,60 3,80 4,00 4,40 4,80 5,20 A i 1600 0,64 0,80 0,96 1,28 1,60 1,92 A c 640 762 873 1067 1231 1371 d h 819 925 1022 1195 1350 1491 d e 4,00 4,20 4,40 4,80 5,20 5,60 A i 1800 0,90 1,08 1,44 1,80 2,16 A c 783 900 1108 1286 1440 d h 976 1078 1261
39、1424 1573 d e 4,60 4,80 5,20 5,60 6,00 A i 2000 1,00 1,20 1,60 2,00 2,40 A c 800 923 1143 1333 1500 d h 1024 1131 1323 1494 1650 d e 5,00 5,20 5,60 6,00 6,40 A i 5 Dimensions for fittings 5.1 Bends Examples of bends are shown in Figure 3. In order to reduce the pressure loss, bends of larger dimensi
40、ons may be provided with splitters. Examples of designing and positioning of splitters are given in annex B. 5.2 Branches Examples of branches are shown in Figure 4. The dimensions r and f are given in Table 2. Table 2 Minimum dimensions of r and f Dimensions in millimetres Branch duct of width a rf
41、 a 600 $ 150 $ 200 5.3 Transformation pieces Examples of transformation pieces are shown in Figures 5 to 7. For connections between rectangular and circular ducts see also EN 1506.Page 7 EN 1505:1997 BSI 1998 a) b) c) 908 bend 908 transformation bend e$ 25 mm r$ 100 mm r$ 100 mm l = 0,5 a + r + e e
42、1 and e 2 $ 25 mm r$ 100 mm r y + c + r i l 1 = 0,5 c + r i + e 1 l 2 = 0,5 c + r i + e 2 d) e) f) bends,a#908 e$ 25 mm r i $ 100 mm l = (0,5 a + r) tana/2 + e Figure 3 Examples of bends a) b) Figure 4 Branch mounted on the side wall of a ductPage 8 EN 1505:1997 BSI 1998 a) concentric b) eccentric F
43、igure 5 Transformation between ducts with rectangular cross-section a) concentric b) eccentric Figure 6 Transformation between one duct with rectangular, and one with circular cross-section Figure 7 Branch with circular cross-section as a transformation piece to a duct with rectangular cross-section
44、 6 Tolerances and deviations The tolerance of the length L of a straight duct is 0,005 L. The tolerance of angles is 28. The deviation of a, b, c, d, e, f is mm 24 0 The deviation l, l p and r is given in Table 3. Table 3 Deviation of l, l p and r Dimensions in millimetres l, l p r Deviation # 15 0
45、22 1 5 0 #100 25 100 2 0 210Page 9 EN 1505:1997 BSI 1998 Annex A (informative) Examples of alternative designs of connections a) Rolled steel angle flanged joints with welded corners b) Rolled steel flat flanged joint with welded corners c) Reinforced flange cleat with C-cleat d) Slide on flange e)
46、Slide on flange f) Integral standing flanged with C-cleat g) Standing flange with double rubber gasket and C-cleat h) Standing flange with single rubber gasket and C-cleat Figure A.1 Examples of alternative designs of connections Annex B (informative) Comments and notes to clause 5 B.1 General It is
47、 recommended that splitters are positioned in accordance with the examples given in Table B.1. Designers should take account of individual system requirements regarding acoustics, velocity and pressure when selecting duct fittings. NOTE 1 The bend shown in Figure 3a) is only recommended for use on l
48、ow pressure/velocity systems and smaller dimensions of ducts. NOTE 2 For bends shown in Figures 3b) and 3c), with radius r less than 100 mm, splitters are recommended in accordance with Table B.1 and Figure B.1. If alternatively r is increased to 0,5a splitters may be omitted. NOTE 3 For bends shown
49、 in Figures 3d), 3e) and 3f), with angles # 458, splitters are not required but for angles 458, splitters are recommended. NOTE 4 For transformation pieces, as shown on Figures 5 and 6, which are large or are used on high velocity systems the slope anglea should be reduced. Table B.1 Positioning of splitters Duct width a Number of splitters Distance between splitters mm (approximate) mm a 1 a 2 a 3 400# 800 1 a/3 800# 1600 2 a/4 a/2 1600# 2000 3 a/8 a/3 a/2Page 10 EN 1505:1997 BSI 1998 F
