1、DEUTSCHE NORM Februarv 1998 Ventilation for buildings Sheet metal air ducts and fittings with rectangular cross section - Dimensions English version of DIN EN 1505 DIN EN 1505 ICs 91.1 40.30 Descriptors: Buildings, ventilation, air ducts, fittings, dimensions. Supersedes parts of DIN 241 90 and DIN
2、241 91, November 1985 editions. Lftung von Gebuden - Luftleitungen und Formstcke aus Blech mit Rechteckquerschnitt - Mae European Standard EN 1505 : 1997 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by CEN/TC 156. The resp
3、onsible German body involved in its preparation was the Normenausschu Heiz- und Raum- lufttechnik (HVAC Standards Committee). It should be noted that this standard does not specify minimum wall thicknesses of ducts and fittings. Until publication of a standard covering methods of measurement (in cou
4、rse of preparation), the minimum wall thicknesses specified in the November 1985 editions of DIN 24190 and DIN 24191 shall apply. Amendments Parts of DIN 24190 and DIN 24191, November 1985 editions, have been superseded by the specifications of EN 1505. Previous editions DIN 241 56-3: 1966-07; DIN 2
5、4156-4: 1966-07; DIN 241 57-1 : 1966-07; DIN 241 57-3: 1966-07; DIN 241 90: 1985-1 1 DIN 241 91 : 1985-1 1. EN comprises 15 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 1505 : 1998-0 V Deutsches Institut fr Nonung e. V., Berlin. Luth Verlag GmbH,
6、D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 08 Sales No . . 1108 07.98 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1505 December 1997 ICs 91.140.30 Descriptors: Buildings, ventilation, air ducts, fittings, dimensions. English versio
7、n Ventilation for buildings Sheet metal air ducts and fittings with rectangular cross section Dimensions Ventilation des btiments - Conduits en tle et accessoires section rectangulaire - Dimensions Lftung von Gebuden - Luftleitungen und Formstcke aus Blech mit Rechteckquerschnitt - Mae This European
8、 Standard was approved by CEN on 1997-1 0-25. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning
9、 such national stand- ards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own lang
10、uage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain,
11、Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, 8-1050 Brussels O 1997. CEN - All rights of exploitation in any form and by any means reserved worldwide for
12、CEN national members. Ref. No. EN 1505 : 1997 E Page 2 EN 1505 : 1997 Contents Foreword Introduction 1 Scope 2 Normative references 3 Definitions and symbols 4 Dimensions aand values for ducts 5 Dimensions for fittings 6 Tolerances and deviations Annexes A (informative) Examples of alternative desig
13、ns of connections B (informative) Comments and notes to clause 5 C (informative) Bibliography Page 3 4 5 5 5 7 9 12 13 14 15 Page 3 EN 1505 : 1997 Circular sheet Circular sheet metal ducts metal ducts Dimensions Strength and leakage Foreword Redangular sheet metal Hangers and leakage duck Strength a
14、nd supports This European Standard has been 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 h
15、as a parallel standard referring to dimensions 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
16、 by endorsement, at the latest by June 1998, and conflicting national standards shall be withdrawn at the latest by June 1998. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
17、lgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. I Mechanical Building Services +, r, Ventilation and air conditioning IxIyI“I-I, Air handling units i Installation
18、i= Measurement of duct surface Dimensions ductwork components io facilitate maintenance Determinaiion of mechanical energy loss insulation ducthoards Figure 1: Position of EN 1505 in the field of mechanical building services Page 4 EN 1505 : 1997 Introduction This standard has been prepared by CEN/T
19、C 156 to specifi 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 IS0 7807: 1983 concerning recommended sizes. The dimensions given for duct fittings are based on d
20、ocument EUROVENT 2/4? See annex C Page 5 EN 1505 : 1997 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 conditioning systems in buildings subject to human occupancy. The
21、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 by dated or undated reference, provisions from other publicati
22、ons. 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 Standard only when incorporated in it by amendment or revision
23、. 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 - Sheet metal air ducts and fittings with circular cross section - Dimensions prEN 1507 Ventilation for buildings - Stren
24、gth and leakage of sheet metal air ducts with rectangular cross section - 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 dimension used for designation, calculati
25、on and application of ducts and fittings. For ducts, the nominal size is the internal dimension of side a and side h, 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 is the visible side (see figure 2).
26、Page 6 EN 1505 : 1997 Figure 2: Application of denominations for the nominal size 3.2 effective length of fitting (i): 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
27、to the overall length of the air distribution system. 3.4 cross-sectional area (AE): Product of the side lengths a and b. 3.5 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
28、 cause the same pressure drop at equal air velocity and equal friction coefficients 4 (cross -sectional area) - 2 ab - dh = internalperimeter a + b Page 7 EN 1505 : 1997 3.7 equivalent diameter (de): For a rectangular duct, the diameter of a circular duct which will cause the same pressure drop at e
29、qual air flow and equal friction coefficients. 3.8 angle of a transformation piece (01): The larger angle between two opposite sides of a transformation piece. 3.9 deviation, tolerance 3.9.1 upper deviation: Algebraic difference between the maximum limit of size and the corresponding nominal size. 3
30、.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 without sign. 4 Dimensions and values for ducts The dimensions for duct
31、s, including the corresponding values of cross-sectional area (A, in m2), hydraulic diameter (dh in mm), equivalent diameter (& in mm) and duct surface area per metre length (A, in m2/m), are given in table 1. The equivalent diameter d, is calculated using the following formula: de = 2b(7t2“ (1 + ah
32、)+“ /(ah)3 where: n = 1/(1,05 log Re - 0,45) Tolerances and deviations are given in clause 6. Page 8 EN 1505 : 1997 Table 1: Dimensions and values for ducts Page 9 EN 1505 : 1997 5 Dimensions for fittings 5.1 Bends Examples of bends are shown in figure 3. 90 O bend I_ I 4 e II P T e225mm r 2 loom 1
33、= 0,5 a+ r + e r 90 transformation bend bends, a I 90 a e225mm ri 2 100 mm 1 = (0,5 a + r) tg d2 + e el and e2 2 25 mm r2 1OOmm r,=c+& li = 0,5 c + ri + el l2 = 0,5 c + ri + e2 Figure 3: Examples of bends Page 1 O EN 1505 : 1997 Branch duct of width a (mm) r mm a 600 2 150 200 15 5 100 100 b U U 1 (
34、II I I -4, I O -2 O -5 O -10 Figure 7: Branch with circular cross section as a transformation piece to a duct with rectangular cross section 6 Tolerances and deviations The tolerance of the length L of a straight duct is 0,005 L The tolerance of angles is 2“. The deviation of a, b, c, d, e, f is mm
35、The deviation 1, l, and r is gven in table 3. Table 3: Deviation of 1, I, and r I I 1, $r Deviation mm mm Page 13 EN 1505 : 1997 Annex A (informative) Examples of alternative designs of connections a) Rolled steel angle flanged joints with welded corners c) Reinforced flange cleat with C - cleat I I
36、 e) Slide on flange b) Rolled steel flat flanged joint with welded corners A h d) Slide on flange Q 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 c
37、onnections Page 14 EN 1505 : 1997 Duct width a Number of mm splitters 400 I800 1 800 5 1600 2 1600I2000 3 Annex B (informative) Distance between splitters, mm (approximate) al a2 a3 al3 al4 al2 al8 al3 al2 Comments and notes to clause 5 B.l General It is recommended that splitters are positioned in
38、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 low pressurehelocity systems and smaller dime
39、nsions of ducts. NOTE 2: For bends shown in figures 3b) and 3c) with radius r less than 100mm, 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 in figures 3d), 3e) and 39 with angles I45
40、 O splitters are not required but for angles 45 O 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 angle 01 should be reduced. Figure B.1: Positioning of splitters Page 15 EN 1505 : 1997 Annex C (informative) Bibliography The following documents are referred to in the introduction: IS0 7807 Au distribution - Straight circular sheet metal ducts with a lock type spiral seam and straight rectangular sheet metal ducts - Dimensions EUROVENT 2/4 Sheet metal air ducts - Standard for fittings
