1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 181 Factory-Made Air Ducts and Air ConnectorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED
2、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Factory-Made Air Ducts and Connectors, UL 181 Eleventh Edition, Dated July 25, 2013 Summary of Topics This new edition of ANSI/UL 181 includes the following changes in requirements: Clarity to the corrosio
3、n resistance test method Flame Penetration Test - Deletion of requirement for continuous monitoring of natural gas and added clarity on the furnace thermocouples Clarity to the puncture test impact locations Clarity to the static load test Clarity to the pressure test regarding testing of joints Cla
4、rity to the collapse test regarding testing of joints Clarity to the tension test regarding testing of joints Clarity to the torsion test regarding testing of joints Clarity to the leakage test Delete Manufacturing and Production Tests section Exemption of full instructions The new and revised requi
5、rements are substantially in accordance with Proposal(s) on this subject dated June 1, 2012 and March 22, 2013. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, o
6、r otherwise without prior permission of UL. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, conseque
7、ntial, indirect or similar damages, including loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liabi
8、lity for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including re
9、asonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JULY 25, 2013 UL 181 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL The requir
10、ements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future eff
11、ective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. JULY 25, 2013 UL 181 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 25, 2013 1 UL 181 Standard for Factory-Made Air Ducts and Air Conn
12、ectors The rst through the fourth editions were titled Air Ducts. The fth edition was title Factory-Made Air Duct Materials and Air Duct Connectors. The sixth edition was titled Factory-Made Air Ducts and Connectors. First Edition November, 1961 Second Edition March, 1967 Third Edition April, 1970 F
13、ourth Edition May, 1972 Fifth Edition April, 1974 Sixth Edition August, 1981 Seventh Edition April, 1990 Eighth Edition November, 1994 Ninth Edition April, 1996 Tenth Edition May, 2005 Eleventh Edition July 25, 2013 The most recent designation of ANSI/UL 181 as an American National Standard (ANSI) o
14、ccurred on July 25, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. This ANSI/UL Standard for Safety consists of the Eleventh Edition. The Department of Defense (DoD) has adopted UL 181 on July 20, 1994 . The publicati
15、on of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development Syst
16、em (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIG
17、HT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 181-2013UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 25, 2013 FACTORY-MADE AIR DUCTS AND AIR CONNECTORS - UL 181 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
18、REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Components 5 3 Units of Measurement .6 4 Undated References 6 CONSTRUCTION 5 Materials .6 PERFORMANCE 6 General 6 7 Tests for Surface Burning Characteristics 7 8 Flame Resistance Test 8 9 Bending Test .8 10 Fl
19、ame Penetration Test 10 10.1 General .10 10.2 Test equipment 10 10.3 Sample preparation .12 10.4 Pre-heat and stabilization .15 10.5 Test method .17 11 Burning Test .17 12 Corrosion Resistance .22 12.1 Test for zinc-coated steel 22 12.2 Tests for coated steel (other than zinc-coated steel) 22 13 Mol
20、d Growth and Humidity Test 23 14 Temperature Test .24 14.1 General .24 14.2 Low temperature .24 14.3 High temperature .24 15 Puncture Test 25 16 Static Load Test 26 16.1 General .26 16.2 Tests for rigid air ducts 26 16.3 Tests for exible air ducts and air connectors. .28 17 Impact test .28 18 Erosio
21、n Test .31 18.1 General .31 18.2 Test installation 31 18.3 Test method .33 19 Pressure Test 33 20 Collapse Test 34 21 Tension Test .34 22 Torsion Test .35 23 Leakage Test 36 JULY 25, 2013 FACTORY-MADE AIR DUCTS AND AIR CONNECTORS - UL 181 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCT
22、ION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MARKING 24 Content 36 INSTRUCTIONS 25 Installation Instructions 37 JULY 25, 2013 FACTORY-MADE AIR DUCTS AND AIR CONNECTORS - UL 181 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION
23、1 Scope 1.1 These requirements apply to materials for the fabrication of air duct and air connector systems for use in accordance with the International Mechanical Code (IMC), International Residential Code (IRC), and Uniform Mechanical Code (UMC), Standards of the National Fire Protection Associati
24、on for the Installation of Air-Conditioning and Ventilating Systems, NFPA No. 90A, and the Installation of Warm Air Heating and Air-Conditioning Systems, NFPA No. 90B. 1.2 The air ducts and air connectors covered by these requirements include preformed lengths of exible or rigid ducts, materials in
25、the form of boards for eld fabrication of lengths of rigid ducts, and preformed exible air connectors. 1.3 For the purpose of these requirements, air ducts and air connectors are classied as follows: Class 0 Air ducts and air connectors having surface burning characteristics of zero. Class 1 Air duc
26、ts and air connectors having a ame-spread index of not over 25 without evidence of continued progressive combustion and a smoke-developed index of not over 50. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this standard shall comply with the requirements for that c
27、omponent. 2.2 A component is not required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.3 A component shall be used i
28、n accordance with its rating established for the intended conditions of use. 2.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied
29、 limits, and shall be used only under those specic conditions. JULY 25, 2013 FACTORY-MADE AIR DUCTS AND AIR CONNECTORS - UL 181 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated without parentheses are
30、 the requirement. Values in parentheses are explanatory or approximate information. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. CONSTRUCTION 5 Mat
31、erials 5.1 Metals used in the assembly of air ducts and air connectors shall be resistant to atmospheric corrosion and shall not be used in combinations that results in galvanic action which deteriorates any part of the system formed from such material. 5.2 To comply with 5.1 with respect to resista
32、nce to atmospheric corrosion, metals which are not inherently corrosion resistant, such as sheet steel, or steel wire, are to have a corrosion-resistant coating. 5.3 The corrosion-resistant coating shall provide protection against atmospheric corrosion as determined by Section 12, Corrosion Resistan
33、ce, at least equivalent to steel having a uniform coating of zinc of not less than 0.3 ounce per square foot (91.6 g/m 2 ) of surface area. 5.4 Materials which have their protective coating damaged or the effectiveness reduced by the manufacturing process are to be tested after being subjected to su
34、ch process. PERFORMANCE 6 General 6.1 Table 6.1 indicates the tests applicable to the specic forms of air ducts, air connectors, and joining materials. Additionally, joining materials intended for factory installation are to be evaluated in conjunction with the air duct and air connector tests when
35、specied in the individual sections of this Standard. Exception: Joining materials which comply with the requirements in the Standard for Closure Systems for Use With Rigid Air Ducts and Air Connectors, UL 181A or the Standard for Closure Systems for Use With Flexible Air Ducts and Air Connectors, UL
36、 181B are not required to be evaluated. JULY 25, 2013 FACTORY-MADE AIR DUCTS AND AIR CONNECTORS - UL 181 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 6.1 Test program Tests Air ducts Air connectors Joining materials Rigid Flexible
37、Surface Burning Characteristics XXX Flame Resistance X Flame Penetration X X Burning X X X Corrosion a XXXX Mold Growth and Humidity XXXX Temperature X X X Puncture X X Static Load X X b X b Impact X X Erosion X X X Pressure X X X Collapse X X X Tension X X Torsion X X Bending X X Leakage X X X NOTE
38、S X Test applicable. Test not applicable. a Applicable to parts of metals not inherently corrosion resistant. b Test applicable for exible air ducts and air connectors that incorporate vapor barriers supported by grommets or other means of eld support. 7 Tests for Surface Burning Characteristics 7.1
39、 Representative samples of air ducts and air connectors shall be evaluated for surface burning characteristics and classied according to the requirements in 7.2 and 7.3. 7.2 Class 0 material shall have surface burning characteristics of zero (ame spread and smoke developed). 7.3 Class 1 material sha
40、ll have a ame-spread index of not over 25 without evidence of continued progressive combustion and a smoke-developed index of not over 50. 7.4 Tests for surface burning characteristics are to be conducted as specied in the Standard for Test for Surface Burning Characteristics of Building Materials,
41、UL 723. For the purpose of establishing the ame spread and smoke developed indices, typically a minimum of three tests are to be conducted. JULY 25, 2013 FACTORY-MADE AIR DUCTS AND AIR CONNECTORS - UL 181 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMIS
42、SION FROM UL 7.5 Samples are to be positioned in the 25 foot (7.62 m) long re test chamber specied in the Standard for Test for Surface Burning Characteristics of Building Materials, UL 723. When the composite duct is rigid, no supplemental supports are to be used. When required, due to unusual char
43、acteristics of a composite duct that affects the conduct of the test, 1/4 inch (6.4 mm) diameter steel rods shall be used to support the duct constructions. When supporting rods are used, they are to be spaced between 2 feet and 4 feet (0.6 m and 1.2 m) apart as required for support of the samples.
44、7.6 When the inside and outside surfaces of an air duct or air connector are of different composition, tests for surface burning characteristics are to be conducted by exposing rst one side and then the other to the test conditions, using different samples for each exposure. A third test is then to
45、be conducted on the worse case condition using a different sample for the exposure. 7.7 Fabrics, tapes, or other joining materials eld-applied to or forming part of a factory-made air duct, air connector, or other parts identied as a component of the product are to be in place during the tests for s
46、urface burning characteristics. When, however, the application of the fabric, tape, or other joining material to the sample is likely to affect the various surface burning characteristic indices, samples are to be tested with and without longitudinal seams or joints, and the higher indices taken. 8
47、Flame Resistance Test 8.1 Fabrics, tapes, or other joining materials shall be those classied for ammability when, as applied to an air duct or air connector, the material is exposed to the internal air stream. 8.2 Tests of fabrics, tapes, or other joining materials to determine compliance with 8.1 a
48、re to be made in accordance with the method described in the Standard Methods of re Tests for Flame Propagation of Textiles and Films, NFPA 701. 9 Bending Test 9.1 Sections of exible air ducts and air connectors shall not be damaged when bent through a 180-degree arc over a mandrel having a diameter
49、 equal to the inside diameter of the air duct or air connector when tested in accordance with 9.3 9.5. 9.2 Sections of exible air ducts shall maintain minimum insulation and scrim (when applicable) overlaps when tested in accordance with 9.6 9.10. Exception: A exible air duct whose inner core complies with the Flame Penetration Test without insulation is not required to be tested in accordance with 9.6 9.10. 9.3 Previous
