1、BRITISH STANDARD Ventilation for buildings - Sheet metal air ducts and fittings with rectangular cross-section - Dimensions The European Standard EN 15051997 has the status of a British Standard ICs 91.140.30 BS EN 1505:1998 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW - *_
2、 STD-BSI BS EN L505-ENGL 1998 Lb24bb9 Ob92473 L5T AmdNo. BS EN 1606:1998 Date Textafm National foreword This British Standard is the English language version of EN 15051997 published by the European Committee for St;uidarWon (CEN). The UK participation in its prepamtion was entrusted to Technical Co
3、mmittee RHE/2, Air distsibution and air diffusion, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the interpretation, or proposais for change, and keep the UK interests informed, - monitor related internationa
4、l and European developments and promulgate themintheUK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BS
5、I Standards Catalogue under the section entitled “International Standards Correspondence Index“, or by using the “Find“ faciity of the BSI Standards Elemnic Catalogue. A British Standard does not purport to include ail the necessary provisions of a contract. Users of British Standards are responsibl
6、e for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a hnt cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. This British Standard,
7、having been prepared under the direction of the Engineering Sedor Board, was published under the authority of the Standards Board and comes into effect on 15 Aprii 1998 O BSI 1998 ISBN O 680 29026 6 - STD-BSI BS EN L505-ENGL 1978 I LbZi-lbb9 Ob9247i-l 09b D EUROPEAN STANDARD EN 1505 NORNE EUROPENNE
8、EUROP ; BI Page 2 EN 1505:1997 Ventilation and air Heating systems conditioning systems Foreword This European Standard has been prepared by Technical Committee CENRC 156, VentMion for buildings, the secretariat of which is held by BSI. This standard is one of a series of standards for ductwork used
9、 for ventilation and air conditioning of buildings for human occupanq, and it has a parailel standard referring to dimensions of ducts with circular crosseclion. building services is shown in Figure 1. This European Standard shal be given the status of a national standard, either by publication of a
10、n identical text or by endorsement, at the latest by June 1998, and conflicting national standards shall be withdrawn at the latest by June 1998. According to the CENKENELEC internai Regulations, the national standards orga3uzations of the following countries are bound to implement this European Sta
11、ndard Austrki, Belgium, Czech Republic, Denmark, Finiand, France, Germany, Greece, Iceland, Ireland, Spain, Sweden, Switzerland and the United Kingdom. me position of this standard the field of mechanid Lemg, Netherland% Nowax Portugal, I 11, I I I I Mechanical building services I Identification I I
12、 Air handling I e Flexible ducts Determination Ductwork of mechanical made of energy loss insulation ductboards units Circular sheet Circular sheet metal ducts metal ducts Dimensions Strength and sheet metal ducts. of duct surface area Installation I Rectangular sheet metal ducts Strength and leakag
13、e I I 1 supports I Requirements for ductwork components to facilitate maintenance Flanges II I I - Figure 1 - Position of EN 1606 in the field of mechanical building services O BSI 1998 Page 3 EN 1505:1997 Contents Foreword Introduction 1 Scope 2 Normative references 3 Denitions and symbols 4 5 Dime
14、nsions for fittings 6 Tolerances and deviations AnnexA (informative) Examples of alternative designs of connections Annex B (iormative) Comments and notes to clause 6 Annex C (iormative) Bibliography Dimensions and values for ducts Page 2 4 4 4 4 5 6 8 9 9 10 * * cn O BSI 1998 STD-BSI BS EN LSO5-ENG
15、L 1998 Lb24hLS Ob72477 BT5 Page 4 EN 1505.:1997 Introduction This standard has been prepared by CENRY: 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 wi
16、th Is0 780719B1) concerning recommended sizes. The dimensions given for duct fittings are based on document EUROVENT 2/4). 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
17、 conditioning systems in buildings subject to human occupancy The wail thickness of duds and fittings is not specified in this standax6 strength and leakage are dealt with in prEN 1507. The corresponding standard for circular ducts is EN 1506. 2 Normative references This European Standard incorporat
18、es by daM or undated reference, provisions from other publications. These nonnative references are cited at the approptiate 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
19、 Standard oniy when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. CR 1279s, Vmtihtiun for buings - Symbols and temZirnl4l EN 1506, Ventilation for buildings - Ducczoork. Circular sheet metal air ducts and duct fittings
20、- Dimenswns prEN 1507, Vitilatiun fi buings - DuctworxC - Rectangular sheet metal air ducts - Strength and ladmgle- Requirements and testing 3 Denitions and symbols For the purposes of this standar4 the defmitions given in CR 12792, together with the following, apply 3.1 nominal size reference dimen
21、sion 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 smailer end of a transformation piece are denoted by c and d, where c
22、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 stmght duct contributes to the overall length of the air distribution system
23、 3.4 cross-sectional area (A,) product of the side lengths a and b 3.6 duct surface area (Ai product of the internal perimeter and the duct length 3.6 hydraulic diameter (dh) for a rectangular duct, the diameter of a circular duct which will cause the same pressure drop at equal air velocity and equ
24、al friction coefficients 4 (crosssectionai area) 2 ab internal perimeter a + b - dh = - 3.7 equivalent diameter (de) for a rectangular duct, the diameter of a circular duct which will cause the same pressure drop at equal air flow and equal fiction coefficients 3.8 angle of a transformation piece (a
25、) the iarger angle between two opposite sides of a transformation piece see annex c. O BSI 1998 Page 5 EN 1605:1997 260 0,063 250 273 l,oo 0,075 273 296 1,lO 0,lO 308 337 1,30 0,13 333 374 1,50 0,15 353 406 1,70 0,20 381 463 2,lO 3.9 Deviation, tolerance 3.9.1 upper deviation algebraic difference be
26、tween the maximum limit of size and the corresponding nominal size 3.9.2 lower 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 withou
27、t sign 300 0,090 300 327 1,20 0,12 343 373 1,40 0,15 375 413 0,60 0,18 400 448 1,80 0,24 436 511 2,20 4 Dimensions and values for ducts The dimensions for ducts, including the corresponding values of cross-sectional area (A, in m2), hydrauiic diameter (dh in mm), equivaient diameter (de in mm) and d
28、uct surface area per me- length (Ai in m2/m), are given in Table 1. The equivalent diameter de is calculated using the following formula: where Tolerances and deviations are given in clause 6. de = 2b(7+ (1 + u/b)+n/(a/b)3)“(n-5) n = 1/(1,05 logRe - 0,45) Table 1 - Dimensions and values for ducts Si
29、de lengths I, 250 300 400 500 600 800 100 0,020 133 149 0,60 0,025 143 165 O, 70 0,030 150 180 0,30 0,040 160 205 l,oo 160 0,030 171 186 0,70 0,038 188 206 0,80 0,045 200 224 0,060 218 255 1,lO 0,075 231 283 1,30 0,090 240 307 1,50 200 0,040 200 218 0,80 0,050 222 241 0,90 0,060 240 262 l,oo 0,080 2
30、67 299 1,20 o, 10 286 331 1,40 0,12 300 359 1,60 0,16 320 410 2,Oo 400 O, 16 400 436 1,60 0,20 444 483 1,80 0,24 480 524 2,oo 0,32 533 598 2,40 0,25 500 545 2,00 0,30 545 592 2,20 0,40 615 675 250 600 0,36 600 654 2,40 O, 686 745 2.80 O BSI 1998 Branch duct of width a r f Page 6 EN 1605:1997 Table 1
31、 - Dimensions and values for ducts (continued) 160 600 600 800 lo00 1200 100 Side lengths m loo0 0,50 667 747 3700 0,60 750 825 3,20 1,oo lo00 1090 4700 0,30 0,40 462 571 566 662 2,60 2,80 1200 0,72 800 896 3,60 1,20 1091 1184 4,40 174-4 1200 1308 4780 0,36 O,r-r h) Standing flange with single rubbe
32、r gasket and C-cleat, Figure A.l- Examples of alternative designs of connections Annex B (informative) Comments and notes to clause 5 B.l General It is recommended that splitters are positioned in accordance with the examples given in Table B.l. Designers should take account of individual system req
33、uirements regarding acoustics, velocity and pressure when selecting duct fittings. NOTE 1 The bend shown in Figure 3a) is only recommended for use on low pressure/velocity systems and smalier dimensions of ducts. NOTE 2 For bends shown in Figures 3b) and 3c), with radius T less than 100 mm, splitter
34、s are recommended in accordance with Table B.l and Figure B.1. If alternatively T is increased to O,% splitters may be omitted. NOTE 3 For bends shown in Figures 3d), 3e) and 3f), with angles 5 45”, splitters are not required but for angles 45”, splitters are recommended. NOTE 4 For transformation p
35、ieces, as shown on Figures 5 and 6, which are large or are used on high velocity systems the slope angle (Y should be reduced. O BSI 1998 STD-BSI BS EN L505-ENGL 1998 Lb2LibbS Clb92983 OT9 Page 10 EN 16CE1997 Figure B.l- Positioning of splitters Annex C (informative) Bibliography The foiiowing docum
36、ents are referred to in the introduction. Lso 7807, Air distribution - Straight c2rcular sheet metal ducts with a lock; type spiml seam and straight rectangular sheet metal ducts - DimenS.ions EUROVENT 24, Shset metal air ducts - Standard for fittiTlgs O BSI 1998 STD-BSI BS EN 1505-ENGL 1778 M LbZIb
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