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1、INTERNATIONAL STANDARD IS0 13351 First edition 1996-06-l 5 Industrial fans - Dimensions Ventilateurs industriels - Dimensions This material is reproduced from IS0 documents under International Organization for Standardization (ISO) Copyright License number IHSIICC11996. Not for resale. No part of th
2、ese IS0 documents may be reproduced in any form, electronic retrieval system or otherwise, except as allowed in the copyright law of the country of use, or with the prior written consent of IS0 (Case postale 56, I211 Geneva 20, Switzerland, Fax +41 22 734 10 79), IHS or the IS0 Licensers members. Re
3、ference number IS0 13351 :I 996(E) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword IS0
4、 (the international Organization for Standardization) is a worldwide fed- eration of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical c
5、ommittee has been established has the right to be rep- resented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 col- laborates closely with the International Electrotechnical Commission (IEC) on all matters of el
6、ectrotechnical standardization. Draft International Standards adopted by the technical committees are cir- culated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 13351 was pr
7、epared by Technical Committee lSO/TC 117, industrial fans. 0 IS0 1996 All rights reserved. Unless otherwise specified, no part of this publication may be repro- duced or utilized In any form or by any means, electronic or mechantcal, rncluding photo- copytng and mrcrofilm, without permrssron In writ
8、ing from the publisher. International Organrzation for Standardization Case Postale 56 l CH-1211 Geneva 20 l Switzerland Printed in Switzerland ii Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Re
9、sale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 IS0 13351:1996(E) Introduction This International Standard gives details of circular and rectangular flanges as well as specifying “fan size designation”. For circular flanges, the values specif
10、ied in IS0 6580:1981, General purpose industrial fans - Cir- cular flanges - Dimensions are retained for the next five years in parallel with those given in table 2 of this International Standard. Though not constraining a manufacturers choice of flange details, this In- ternational Standard provide
11、s the opportunity for interchangeability and therefore a reduction in technical obstacles to free trading. Throughout this International Standard, the principal dimensions are based on the rounded values of “preferred” numbers given in IS0 497. III Copyright International Organization for Standardiz
12、ation Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 13351:1996(E) Industrial fans - Dimensions 1 Scope This Internati
13、onal Standard specifies size designations for industrial fans and specifies dimensions for the cir- cular and rectangular flanges of general purpose in- dustrial fans as defined in 3.1 .I. It does not apply to cross-flow fans, or fan appliances used for household or similar applications. For circula
14、r flanges, this International Standard pro- vides two different flange series, one for standard casing thicknesses and a second for heavy duty fans as used on board sea-going vessels or in heavy indus- try. In order not to restrict fan designs unduly, only the pitch diameter, hole numbers and hole d
15、iameters are standardized. Flange thickness as well as internal and external flange diameters can be chosen freely within the limits of good engineering practice. 2 Normative references The following standards contain provisions, which, through reference in this text, constitute provisions of this I
16、nternational Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreement based on this International Standard are encouraged to investi- gate the possibility of applying the most recent edi- tions of the standards indicated
17、 below. Members of IEC and IS0 maintain registers of currently valid Inter- national Standards. I SO 3: 1973, Preferred numbers - Series of preferred numbers. IS0 497:1973, Guide to the choice of preferred num- bers and of series containing more rounded values of preferred numbers. 1) To be publishe
18、d. IS0 13349:-l), industrial fans - Terminology. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of this International Standard, the definitions given in IS0 13349 and the followrng defi- nitions apply. 3.1.1 general purpose industrial fan: Fan for which the flange dimensio
19、ns conform to those given in fig- ure 4 and table 2. 3.1.2 heavy duty fan: Fan for which the flange di- mensions are greater and conform to those given in figure 4 and table 3. 3.1.3 nominal impeller tip diameter, D: Diameter of the impeller tip on which the design of the fan is based. 3.2 Symbols a
20、nd abbreviations For the purposes of this International Standard, the following symbols and abbreviations apply: D dl d2 d3 d4 e g 1 N a nominal impeller tip diameter (see figures 1, 2 and 3) actual impeller tip diameter (see figures 1, 2 and 3) pitch circle diameter hole diameter bolt diameter wash
21、er diameter casing thickness hole offset arc length between bolt holes number of holes angle between bolt holes Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo rep
22、roduction or networking permitted without license from IHS -,-,- IS0 13351:1996(E) Figure 1 - Impeller of a centrifugal fan 4 Required characteristics Figure 2 - Impeller of an axial-flow fan 4.1 General This International Standard adopts the Renard R 20 Series as given in IS0 497 as the nominal dim
23、ensions for impeller tip diameters, inside diameters of circular flanges and the inside lengths of the sides of rectan- gular flanges. It takes into account the maximum casing thicknesses likely to be used for general pur- pose industrial fans as well as typical manufacturing tolerances representati
24、ve of “good practice”. The dimensions of circular and rectangular flanges are given in sizes which correspond to nominal diameters from 100 mm to 2 000 mm. In many cases, in the smaller sizes, below about 200 mm, flange details are determined by the customers specification. However, where this is no
25、t the case, then this International Standard shall be used. 4.2 Designation of fan size Fan size shall be designated by the nominal impeller tip diameter as defined in 3.1.3. This International Standard uses the R 20 Series (see IS0 3) for the fan size designation (nominal impeller tip diameter, 0,
26、in the range 100 mm to 2 000 mm, as shown in table 1. For impeller tip diameters greater than 2 000 mm, the numbers may be selected from the R 20, R 40 or R 80 series. NOTE - Usually D = DR Figure 3 - Impeller of a mixed-flow fan Table 1 - Fan sizes Nominal impeller tin diameter 100 280 800 112 315
27、900 125 355 1ooo 140 400 1 120 160 450 250 1 180 500 1400 200 560 1600 224 630 1800 250 710 2ooo 1) R 10 series numbers are underlined. Dimensions In mrhmetres 4.3 Circular flange characteristics The smallest practical pitch circle diameter can be re- lated to the inside diameter of the fan casing,
28、the casing thickness, the size of the weld fillet or bend radius at the junction of the flange and the casing and the normal washer diameter. This International Standard accepts that the number and diameter of bolts or screws cannot be established on a theoretical basis. Practical experience of sati
29、sfac- tory service, optimum cost of installation and manu- facture as well as dimensional tolerances of production are the most important considerations. The number of flange holes is divisible by four to permit the orientation of cylindrical cased fans to pos- itions at 90”. The holes are disposed
30、equally each side of the centrelines of the fan. This permits a flange to be divided in half should a split casing be required. It 2 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/20
31、07 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 IS0 13351:1996(E) also allows better access to the fixings on the remote side of a fan in a confined installation. Should an intermediate fan size be required, then the R 40 series shall be used to obtain the n
32、ominal inside diameter. The flange details shall be interpreted from the next larger R 20 size. In exceptional circumstances when even smaller in- crements of fan size are required, it is suggested that the R 80 series be used. 4.4 Rectangular flange characteristics The objective of the system is to
33、 provide a maximum of freedom of choice of rectangular dimensions, using standardized flange dimensions and standardized lo- cations and sizes of bolt holes throughout the range of fan outlet sizes. The system is applied by selecting standard bolt hole locations from table 4 for each of the two dime
34、nsions of the fan outlet. Tables 5 and 6 show a series of rectangular outlets based on the R 20 series for two alternate methods of determining aspect ratio. No recommendations are given for the size of angle to be used in the lap-welded design, the choice being de- termined by the hole offset dimen
35、sion, g, and the ability to apply a tightening spanner to the nut and bolt specified. For certain aspect ratios other than 1, there are selections where unequal flanges could result from the system (see note 2 of figure 5). If unequal flanges are undesirable, then equal flange dimensions and bolt si
36、zes may be selected to correspond with the dimensions for the longer of the two sides, but retain- ing the pitch between the bolt holes to correspond to each outlet side dimension. The offset dimension, g, must remain unaltered to maintain the dimensional integrity of the hole positions. Copyright I
37、nternational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 13351:1996(E) Figure 4 - Circular flanges 4 Copyright
38、International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 13351:1996(E) D 4 100 139 112 151 Table 2 - Circular
39、flanges - Dimensions for general purpose fans Dlmenslons in mihmetres Number of holes d, D - N a 1 d2 4 4 1) e“ 2 degrees 19,5 4 90 109 9,5 MB 17 1,5 =S e =S 6 195 4 90 119 9,5 M8 17 1,5ee6 1) Gwen for tnformatlon. Copyright International Organization for Standardization Provided by IHS under licens
40、e with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 13351:1996(E) IS0 Table 3 - Circular flanges - Dimensions for heavy duty fans Dlmenslons V-I mhmetres 1 800 1910 55 40 9 150 24
41、M20 37 8elO I) Given for Information. 6 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- 0 IS0 I
42、S0 13351:1996(E) PA See note 1 Q -A- I Lap-weld design Hole locatlons Fabricated flange design Butt flange design I Lap-weld design Rolled flange design Alternative mounttng designs NOTES 1 Optional corner holes. Position defined by dimension g. 2 For certain aspect ratios other than 1, there are se
43、lections where unequal-sized holes would result from the SYS- tern. If unequal-sized holes are undesirable, then equal hole and bolt sizes may be selected to correspond with the dimensions of the longer of the two sides, but retaining the pitch between the bolt to correspond to each outlet side dime
44、nsion. Figure 5 - Rectangular flanges - Dimensions Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,
45、-,- IS0 13351:1996(E) Table 4 - Rectangular flanges - Dimensions Dlmenslons In milllmetres Fan outlet Pitch r No. of holes per side N Inside casing AorB PA or PB With corner holes Without corner holes 4 4 100 71 4 2 M6 7 19 112 71 4 2 M6 7 19 125 71 4 2 M6 7 19 140 71 4 2 M6 7 19 160 100 4 2 M6 7 19
46、 180 100 4 2 M6 7 19 200 100 4 2 M6 7 19 224 100 4 2 M6 7 19 250 125 4 2 M8 10 19 280 125 4 2 M8 10 19 315 125 5 3 M8 10 19 355 125 5 3 M8 IO 19 400 125 5 3 M8 10 19 450 125 6 4 Ml0 12 32 500 125 6 4 Ml0 12 32 560 125 7 5 Ml0 12 32 630 125 7 5 Ml0 12 32 710 125 8 6 Ml0 12 32 800 125 9 7 Ml0 12 32 90
47、0 125 9 7 Ml0 12 32 1 000 125 10 8 Ml2 14 32 1 120 125 11 9 Ml2 14 37 1 250 125 12 10 Ml2 14 37 1 400 125 12 10 Ml2 14 37 1 600 125 13 11 Ml2 14 37 1 800 125 15 13 Ml2 14 37 2 000 125 16 14 Ml2 14 37 I) Given for information. ,I) max. 2 2 2 2 2 2 2 2 3 3 3 3 3 5 5 5 5 5 5 5 5 5 5 5 5 5 5 Copyright I
48、nternational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/22/2007 20:42:00 MDTNo reproduction or networking permitted without license from IHS -,-,- Q IS0 IS0 13351:1996(E) Table 5 - A series of rectangular outlets based on the R 20 series - Aspect ratios, k, (see footnote 2)l Short side mm Short side mm JO