UL 2518-2016 UL Standard for Safety Air Dispersion Systems (First Edition).pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2518 Air Dispersion Systems STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZE

2、D FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Air Dispersion Systems, UL 2518 First Edition, Dated July 12, 2016 Summary of Topics This First Edition of ANSI/UL 2518 includes a rst time ANSI approval. The new requirements are substantially in accord

3、ance with Proposal(s) on this subject dated March 25, 2016. 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, or otherwise without prior permission of UL. UL provi

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7、 deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. JULY 12, 2016 UL 2518 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2016 UL 2518 tr2 No Text on This PageUL COPYRIGHTED

8、MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2016 1 UL 2518 Standard for Air Dispersion Systems First Edition July 12, 2016 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 2518 as an Americ

9、an National Standard (ANSI) occurred on July 12, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages and Title Page. 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 Requ

10、est in ULs On-Line Collaborative Standards Development System (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

11、shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 2518-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JULY 12, 2016 AIR DISPERSION SYSTEMS - UL 2518 2 No Text on This PageUL COPYRI

12、GHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Components 4 3 Units of Measurement .5 4 Undated References 5 PERFORMANCE 5 Tests for Weight and Air Permeability .5 6 Test for Surface Burning Characteristics .5 7 Mo

13、ld Growth and Humidity Test 6 8 Temperature Test .6 8.1 General .6 8.2 Low temperature .6 8.3 High temperature .7 9 Erosion Test 7 9.1 General .7 9.2 Test installation 8 9.3 Test method .9 10 Pressure Test .9 MARKING 11 Content 10 INSTRUCTIONS 12 Installation Instructions 11 APPENDIX A JULY 12, 2016

14、 AIR DISPERSION SYSTEMS - UL 2518 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements apply to air dispersion system materials for use in accordance with the following Installation Codes: a) Standard

15、of the National Fire Protection Association for the Installation of Air-Conditioning and Ventilating Systems, NFPA No. 90A; b) Standard of the National Fire Protection Association for the Installation of Warm Air Heating and Air-Conditioning Systems, NFPA No. 90B; c) The International Mechanical Cod

16、e (IMC); and d) The Uniform Mechanical Code TM (UMC). 1.2 The air dispersion system materials covered by these requirements include preformed lengths of fabric or non-fabric products intended to convey and distribute air. 1.3 These air dispersion system materials are intended to be limited for use i

17、n air handling systems in exposed locations operating under positive pressure. 1.4 These requirements do not intend to address the joints between sections of air dispersion system materials or end connections. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this Stan

18、dard shall comply with the requirements for that component. 2.2 A component need not 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 S

19、tandard. 2.3 A component shall be used in 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 ce

20、rtain temperatures not exceeding specied limits, and shall be used only under those specic conditions. JULY 12, 2016 AIR DISPERSION SYSTEMS - UL 2518 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3 Units of Measurement 3.1 Values stated w

21、ithout parentheses are 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 standa

22、rd. PERFORMANCE 5 Tests for Weight and Air Permeability 5.1 Representative samples of fabric air dispersion system materials shall be evaluated for weight in accordance with the Standard Test Method for Mass Per Unit Area (Weight) of Fabric, ASTM D 3776, on a minimum of ve specimens. Weight in units

23、 of ounces per square yard (g/m 2 ) shall be determined and included with the Installation Instructions for the product in accordance with 12.2. 5.2 Representative samples of fabric air dispersion system materials shall be evaluated for Air Permeability in accordance with the Standard Test Method fo

24、r Air Permeability of Textile Fabrics, ASTM D 737, on a minimum of ten specimens. Air permeability in units of ft 3 /min/ft 2 (cm 3 /s/cm 2 ) shall be determined and included with the Installation Instructions for the product in accordance with 12.3. 6 Test for Surface Burning Characteristics 6.1 Re

25、presentative samples of air dispersion system materials shall be evaluated for surface burning characteristics according to the requirements in 6.2 and 6.6. 6.2 Tests for surface burning characteristics are to be conducted as specied in the Standard for Test for Surface Burning Characteristics of Bu

26、ilding Materials, UL 723. For the purpose of establishing the ame spread and smoke developed indices, typically a minimum of three tests are to be conducted. 6.3 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 Characteris

27、tics of Building Materials, UL 723. When required, 1/4 inch (6.4 mm) diameter steel rods shall be used to support the materials. 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. 6.4 When the inside and outs

28、ide surfaces of an air dispersion system material 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 be conducted on the wor

29、se case condition using a different sample for the exposure. 6.5 Fabrics, tapes, or other joining materials forming part of an air dispersion product or other parts identied as a component of the product are to be in place during the tests for surface burning characteristics. When, however, the appl

30、ication 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. JULY 12, 2016 AIR DISPERSION SYSTEMS - UL 2518 5UL COPYRI

31、GHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.6 All materials shall 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 Mold Growth and Humidity Test 7.1 Materi

32、als for air dispersion system products, including any nozzles, tapes, fabrics, cements, or other materials shall be resistant to the effects of high humidity under standard atmospheric temperature conditions. The mold shall not spread beyond the inoculated area, and no signicant growth of mold is to

33、 be observed. Materials shall not become deformed or delaminated; tapes, casings, and lining shall remain securely in place; and joints shall not open or show evidence of separation. 7.2 Three samples representing typical wall areas of the assembled air dispersion system materials are to be prepared

34、. Each sample is to be 4 by 4 inches (102 by 102 mm) square and is to include any joining materials. 7.3 Mold mycelia and spores using Chaetomium Globosium are to be applied to the samples. The samples are to be placed in a closed vessel in which an atmosphere saturated with water vapor is maintaine

35、d at room temperature and under dark conditions. The samples are to remain in this atmosphere until the extent of growth has been demonstrated or until the mold and spores have disintegrated, and not less than 60 days. 7.4 The samples then are to be examined visually for extent of mold growth and fo

36、r indications of deterioration in wall structure, exterior casing, inner lining, tapes, and fabrics. 8 Temperature Test 8.1 General 8.1.1 Materials for air dispersion system products, including any nozzles, tapes, fabrics, cements, or other materials shall be resistant to the effects of the temperat

37、ures to which they are exposed in the following tests. 8.2 Low temperature 8.2.1 Material shall not become deformed or show delamination; tapes, casings, and lining shall remain securely in place; and joints shall not open or show evidence of separation when a sample is subjected to the test describ

38、ed in 8.2.2 8.2.4. 8.2.2 Three samples representing typical wall areas of the assembled product are to be prepared. Each sample is to be 8 by 8 inches (203 by 203 mm) square. 8.2.3 The samples are to be placed in a closed vessel in which an atmosphere saturated with water vapor is maintained at room

39、 temperature for a period of 48 hours. The samples then are to be removed and immediately placed in a refrigerated compartment and maintained at a temperature of minus 17.8C (0F) for a period of 24 hours. JULY 12, 2016 AIR DISPERSION SYSTEMS - UL 2518 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURT

40、HER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 8.2.4 The samples shall then be removed from the refrigerated compartment and allowed to be conditioned at 23 2C (73 4F) and 50 5 percent relative humidity for at least 24 hours. The samples then are to be examined visually for indications

41、of deterioration in wall structure, nozzles, exterior casing or interior linings, tapes, fabrics, and cements. 8.3 High temperature 8.3.1 To comply with the requirements of 8.1.1, the exterior and interior surfaces of samples of air dispersion system sections are to be simultaneously exposed to air

42、maintained at not less than 51.7C (125F) on the exterior and not less than 129.4C (265F) on the interior. Any arrangement using samples of air dispersion system sections shall be employed. The test arrangement is to provide means for maintaining air at the specied test temperatures in moving contact

43、 with the two surfaces of the test samples. As a result of the test described in 8.3.2 8.3.4, structural material shall not become deformed or show delamination; tapes, casings, and lining shall remain securely in place; and joints shall not open or show evidence of separation. 8.3.2 At least two re

44、presentative samples are to be specied and prepared for this test. When the product is of uniform grade, thickness, and cross section the samples are to be chosen from the smaller sizes. Sections, varying in grade and thickness with size, may also require samples in other size ranges. 8.3.3 Each sam

45、ple is to be 3 feet (0.91 m) long. At least one end of each sample is to be attached to a metal collar in accordance with the manufacturers instructions. 8.3.4 The conditions of test are to be maintained for a period of 60 days. The samples shall then be removed and conditioned at 23 2C (73 4F) and

46、50 5 percent relative humidity for at least 24 hours. The samples then are to be examined visually for indications of deterioration in wall structure, nozzles, exterior casings or interior linings, tapes, fabrics, and cements. 9 Erosion Test 9.1 General 9.1.1 Material for air dispersion systems shal

47、l not break away, crack, peel, ake off, or show evidence of delamination or continued erosion when air is passed through typical sections at a velocity of two and one-half times the manufacturers rated velocity, and not less than 2500 feet per minute (762 m/min). For the purpose of this requirement,

48、 continued erosion is identied to be either a constant or increasing rate of erosion. JULY 12, 2016 AIR DISPERSION SYSTEMS - UL 2518 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 9.2 Test installation 9.2.1 Previously untested representat

49、ive samples are to be prepared on the basis of grade, thickness, size, and shape. Consideration is to be given to tested samples which are vulnerable to damage under the conditions of test. Such samples may include air dispersion system materials prepared with a representative eld splice of a type as specied by the manufacturer. Samples of non-symmetrical cross section are to be evaluated in the orientations identied as being vulnerable under the conditions of test. 9.2.2 In assembling the t