JIS-A-4009-1997-R2008-ENG.pdf

JIS JAPANESE INDUSTRIAL STANDARD Translated and Published by Japanese Standards Association JIS A 4009 :i997 Components of air duct ICs 91.140.30 Descriptors : ducts (building services), air-conditioning systems, steels, sheet materials Reference number : JIS A 4009 : 1997 (E) 24 S Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS A 4DDî-ENGL 1997 4933b08 0547335 880 m A 4009 : 1997 This translation has been made based on the original Japanese Industrial Standard revised by the Minister of International Trade and Industry through deliberations at Japanese Industrial Standards Committee in accordance with the Industrial Standardization Law: Date of Establishment: 1977-03-01 Date of Revision: 1997-04-20 Date of Public Notice in Official Gazette: 1997-04-21 Investigated by: Japanese Industrial Standards Committee Divisional Council on Architecture JIS A 4009 : 1997, First English edition published in 1997-11 Translated and published by: Japanese Standards Association 4-1-24, Akacaka, Minato-ku, Tokyo, 107 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. 4. Q JSA 1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS A 4007-ENGL 1777 4733b08 054731b 717 = JAPANESE INDUSTRIAL STANDARD JIS A 4009 : 1997 Components of air duct Introduction This Japanese Industrial Standard has been prepared on the basis of IS0 7807, Air distribution-Straight circular sheet metal ducts with a lock type spiral seam and straight rectangular sheet metal ducts-Dimensions published in 1983 as the first edition, including all the provisions of corresponding International Standard with respect to the corresponding part (dimensions). Provisions for defini- tion, classification, structure, material and marking not specified in the correspond- ing International Standard are added in this Standard. The recommended sizes stated in 4.1 are not specified in the corresponding Inter- national Standard because they are added as Japanese original dimensions. 1 Scope This Japanese Industrial Standard specifies components of air duct used for air conditioning and ventilation system (including gas exhausting system) (here- after referred to as “ducts”). Remarks : The normative references to this Standard and corresponding Inter- national Standard are shown in Attached Table 1. 2 Definitions For the purpose of this Standard, the following principal defini- tions apply: standard dimensions The dimensions which are employed as the standard in production, use, distribution, etc. extend over future. recommended dimensions The dimensions which are tentatively specified for rationalization in production, use, distribution, etc. limit pressure The maximum pressure at which safety of duct structure is maintained in such a case that the internal pressure of duct increases tempo- rarily due to closing of a damper in the duct. However, instantaneous pressure change due to quick closing is excluded. 3. Classification 3.1 Classification of ducts Ducts are classified according to the material of duct, the shape of cross section, the jointing method and the internal pressure of duct as stated below. (i) Classification by material of duct (a) Galvanized steel sheet (including PVC lined steel sheet) duct (b) Stainless steel sheet duct (c) Rigid polyvinyl chloride duct (d) Glass wool duct Remarks : The galvanized steel sheet means hot-dip zinc coated steel sheet. I Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS A qOOî-ENGL 1997 m 4733b08 0547317 b53 = Normal service pressure() Classifcation by Positive pressure P, I Negative pressure Pn 2 A 4009 : 1997 Limit pressure Positive pressure I Negative pressure (2) Classification by shape of cross section 7 Low pressure duct P, S +500 High pressure duct 1 High pressure duct 2 +500 P n 2 -1 O00 +1500 -1 500 -1 O00 P n 2 -2 O00 +3 O00 -2 500 (b) Circular duct and circular spiral duct (circular duct with spiral seam) (3) Classification of rectangular ducts of galvanized steel sheet and of stain- less steel sheet by method of jointing work (a) Duct of angle flange technique (b) Duct of corner bolt technique (b-1) Duct of same sheet flange technique (b-2) Duct of slide-on flange technique (4) Classification by internal pressure of duct (a) Low pressure duct (b) High pressure duct 1 (c) High pressure duct 2 3.2 Classification by internal pressure of duct and pressure range Each internal pressure class of duct, and its pressure range shall be as stated in Table 1. However, only low pressure duct is applicable for glass wool ducts. Note (l) Normal service pressure means the internal pressure of duct at normal running. 4 Dimensions and construction 4.1 Size of duct The size of duct means the internal dimensions of duct illus- trated in Fig. 1. The size of rectangular duct shall be expressed by “lateral dimension” x “vertical dimension”, and the size of circular duct by “internal diameter”. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- 3 A 4009 : 1997 y- dimension Fig. 1 Size of duct cross section 4.1.1 Dimensions of rectangular duct The dimensions of long side and short side of rectangular duct shall be as stated in Table 2. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- 4 A 4009 : 1997 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STi).JIS A 4007-ENGL 1777 4933b08 0547320 1'44 500 (550) 560 (600) 630 (650) (700) 7 10 5 A 4009 : 1997 800 900 1 O00 (i 100) 1 120 1250 4.1.2 Internal diameter of circular duct and circular spiral duct Internal diameters of circular ducts and circular spiral ducts are shown in Table 3. Table 3 63 (75) 80 100 125 (150) 160 (175) Internal diameters of circular duct and circular spiral duct 200 250 (300) 3 15 (350) 355 400 450 Remarks 1 The internal diameter of circular duct shall not exceed 630 mm. ) are specified for the time being. 2 The dimensions in ( 4.1.3 Tolerances on dimensions of cross section of rectangular duct The tolerances on dimensions of cross section of rectangular duct shall be such that deviations are O mm at the maximum and -4 mm at the minimum on both of long side and short side, 4.1.4 Tolerances on external diameters of circular duct, circular spiral duct and socket joint Tolerances on external diameters of circular duct, circular spiral duct and socket joint are shown in Table 4. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- 6 A 4009 : 1997 Table 4 Tolerances on external diameters of circular duct, circular spiral duct and socket joint Unit: mm Tolerances on external diameter of socket joint Dimensional tolerances of duct Internal diam- eter of duct 63 80 Minimum Maximum Minimum Maximum -0.7 O +0.5 -1.2 100 125 160 +0.6 -1.3 200 +0.7 -1.4 250 +0.8 -1.5 3 15 +0.9 -1.6 355 +1 -1.7 400 -1.8 450 +1.1 500 -1.9 560 +1.2 630 7 10 +1.6 -2 800 900 +2 -2.1 1 O00 1 120 +2.5 -2.2 1250 Remarks : Dimensional tolerances on cross section of circular glass wool duct shall be -3 mm at the minimum and +3 mm at the maximum. 4.2 Thickness of sheet The thickness of sheet shall be chosen based on the in- ternal pressure of the duct. The thickness of sheet of short side of rectangular duct shall be the same as that of long side. 4.2.1 Rectangular duct The thickness of sheet of rectangular duct is shown below. If there is change in vertical or lateral dimension, the thickness means that for the maximum dimension of altered vertical or lateral dimension. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- STD-JIS A 4009-ENGL 1977 D 4933608 0547322 TLO W Classification of duct by pressure Long side of duct (1 1 High pressure High pressure Thickness I duct 1 I duct2 of sheet Low pressure duct I Classification of duct by pressure High pressure High pressure Thickness duct 1 duct 2 of sheet Low pressure duct 0.5 450 Engaging face of left duct (b) Engaging face of right duct Sealing by aluminum tape with 50 1 1 1 1 1 1 width Coat adhesive on cut surface (cl Detail section of engaging face Fig. 14 (concluded) 4.4.3 Joint of rigid polyvinyl chloride duct (i) Joint of rectangular duct Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- 24 A 4009 : 1997 Long side of duct (1) 1 d 500 (a) The connection is carried out by tightening rigid polyvinyl chloride angles attached to the ends of both ducts by means of bolts and nuts. Gasket shall be inserted between the engaging faces of angles. Minimum size of Maximum Connecting bolt rigid polyvinyl spacing chloride angle Minimum nominal Maximum diameter spacing 50 x 50 x 6 4 O00 M8 (M10) 100 (75) (b) Example of configuration of joint for rectangular rigid polyvinyl chloride duct is shown in Fig. 15 and joint flange in Table 23. 500 c 1 5 1 O00 1 O00 1 5 1 500 Foam soft polyvinyl chloride or soft tube gasket 60 x 60 x 7 4 O00 M8 (M12) 100 (75) 60 x 60 x 7 3 O00 M8 (M12) 100 (75) Welding 15001.52000 2 O00 1 s 3 O00 chloride 60 x 60 x 7 3 O00 M8 100 60 x 60 x 7 2 O00 M8 100 angle Welding y L Rigid polyvinyl chloride sheet Fig. 15 Example of configuration of joint for rectangular rigid polyvinyl chloride duct Table 23 Joint flange for rectangular rigid polyvinyl chloride duct Unit: mm I Joint flange Remarks 1 The connecting bolts and nuts shall be made of stainless steel or rigid polyvinyl chloride. 2 The values in ( ) in the column of connecting bolt show the values when rigid polyvinyl chloride bolt is used. 3 Foam soft polyvinyl chloride or soft tube gasket with the same width as that of flange and a thickness of 3 mm or more shall be used for connection of flanges and the flanges shall be tightened airtight by means of bolts. 4 The diameter of connecting bolt shall not exceed a certain diameter which ensure enough edge distance of flange. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- I Kind and spacing of reinforcement Long side of duct (1) 250 1 S 750 STD-JIS A 4007-ENGL 1777 4733b08 0547340 T3b D Minimum size Maximum spacing Of Angle flange Slide-on flange Same sheet reinforcement technique technique 25 x 25 x 3 1 840 1840 1840 flange technique 25 A 4009 : 1997 750 1 I 1500 1500 c 1 5 2 200 2 200 E 4.5 Reinforcement of duct Ducts shall be reinforced as stated below. The di- rection of reinforcement made perpendicular to longitudinal direction of duct is called lateral direction, and that made parallel to longitudinal direction of duct is called longitudinal direction. Provided that the circular spiral duct is exempted from the reinforcement. 30 x 30 x 3 925 925 925 . 40 x 40 x 3 925 925 925 + Tie rod 40 x 40 x 5 (3) 925 925 + Tie rod - 4.5.1 Reinforcement of galvanized steel duct Reinforcement of galvanized steel duct is stated below. Long side Minimum size of duct ( I ) of steel angle (i) Reinforcement of low pressure duct Position of Remarks reinforcement (a) Lateral reinforcement The kinds and spacings of lateral reinforcement are shown in Table 24, The flange junction made in duct of angle flange technique, duct of same sheet flange technique and duct of slide-on flange technique is considered as the lateral reinforcement. Table 24 Lateral reinforcement of low pressure duct Unit : mm Remarks : The value in ( ) shows that when tie rods are also used. (b) Longitudinal reinforcement For ducts of the size which falls under Table 25, the lateral reinforcement shown in Table 24 is performed and longitudinal reinforcement shall also be carried out. or inside of duct. 2 200 c 1 40 x 40 x 5 (3) Two points or more Remarks : The value in ( ) shows that when tie rods are also used. (2) Reinforcement of high pressure duct 1 or 2 (a) Lateral reinforcement The kind and spacing of lateral reinforcement are shown in Table 26. The flange junction made in duct of angle flange technique, duct of same sheet flange technique and duct of slide-on flange technique is considered as the lateral reinforcement. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Japan, IHS Not for Resale, 02/18/2008 00:34:04 MSTNo reproduction or networking permitted without license from IHS -,-,- 26 A 4009 : 1997 250 I 5 750 750 1 I 1200 1 200 I 5 2 200 2 200 I Table 26 Lateral reinforcement of high pressure duct 1 or 2 Minimum size Maximum spacing Of Angle flange Slide-on flange Same sheet reinforcement 25 x 25 x 3 925 925 925 30 x 30 x 3 925 925 925 4 0 x 4 0 3 925 925 + Tie rod 925 + T i e rod 40 x 40 x 5 (3) technique technique flange technique - 925