1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 1820 Fire Test of Pneumatic Tubing for Flame and Smoke CharacteristicsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED
2、 MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fire Test of Pneumatic Tubing for Flame and Smoke Characteristics, UL 1820 Fourth Edition, Dated October 15, 2004 Summary of Topics This revision is being issued to reaffirm approv
3、al of UL 1820 as an American National Standard. No changes in requirements are involved. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. The revisions are substantially in accordance with Proposal(s) on this subje
4、ct dated March 8, 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, or otherwise without prior permission of UL. UL provides this Standard as is without warr
5、anty 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, consequential, indirect or similar damages, including loss of prots, lost savings, loss of data,
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8、r is storing an electronic Standard on the purchasers computer system. The requirements 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.
9、The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. MAY 10, 2013 UL 1820 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
10、N FROM UL MAY 10, 2013 UL 1820 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2004 (Title Page Reprinted: May 10, 2013) 1 UL 1820 Standard for Fire Test of Pneumatic Tubing for Flame and Smoke Characteris
11、tics First Edition March, 1989 Second Edition May, 1994 Third Edition August, 1997 Fourth Edition October 15, 2004 This ANSI/UL Standard for Safety consists of the Fourth Edition including revisions through May 10, 2013. The most recent designation of ANSI/UL 1820 as a Reaffirmed American National S
12、tandard (ANS) occurred on May 10, 2013. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. 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
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14、se Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2013 UNDERWRITERS LABORATORIES INC. ANSI/UL 1820-2004 (R2013)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 15, 2004 UL 1820 2 No Text on This PageUL COPYRIG
15、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 General 4 2.1 Units of measurement .4 2.2 Undated references .4 PERFORMANCE 3 Test Assembly 5 3.1 Fire test chamber .5 3.2 Smoke measurement .9 3.3 Temperature measurem
16、ent .10 4 Test Specimens .10 5 Calibration of Test Equipment .11 6 Test Procedure 16 REPORT 7 General .17 OCTOBER 15, 2004 UL 1820 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 This is a test method for determinin
17、g values of ame propagation distance and optical smoke density for pneumatic tubing that is to be installed in ducts, plenums, and other spaces used for environmental air. The purpose of this test method is to determine whether the ame-propagation and smoke-generating characteristics of these tubes
18、are in accordance with the provisions of Installation of Air Conditioning and Ventilating Systems, NFPA 90A. Exception No. 3 of Section 2-2.1.2 of NFPA 90A states that pneumatic tubing having the required re-resistant and low-smoke-producing characteristics are capable of being installed in the spac
19、e between the ceiling and the oor or roof above, used as an air handling plenum. 1.2 This test method does not cover the construction requirements for tubes for pressure or other performance requirements. 1.3 A product that contains features, characteristics, components, materials, or systems new or
20、 different from those covered by the requirements in this standard, and that involves a risk of re or of electric shock or injury to persons shall be evaluated using appropriate additional component and end-product requirements to maintain the level of safety as originally anticipated by the intent
21、of this standard. A product whose features, characteristics, components, materials, or systems conict with specic requirements or provisions of this standard does not comply with this standard. Revision of requirements shall be proposed and adopted in conformance with the methods employed for develo
22、pment, revision, and implementation of this standard. 2 General 2.1 Units of measurement 2.1.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 2.2 Undated references 2.2.1 Any undated reference to a code or standard appearing i
23、n the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. OCTOBER 15, 2004 UL 1820 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL PERFORMANCE 3 Test Assembly 3.1 Fire test chamber
24、 3.1.1 The re test chamber is to consist of a horizontal duct having the shape and size shown in Figures 3.1 3.3. The sides and base of the duct are to be lined with insulating masonry as illustrated in Figure 3.2 consisting of a row of refractory re brick a . One side is to be provided with a row o
25、f double-pane (inside pane mounted ush with inner wall see Figure 3.2) pressure-tight (as described in 5.2 and 5.3) observation windows b exposed area: 2-3/4 1/4 by 11 1-1/2 inches (69.8 6.3 by 279 38.1 mm) located so that the entire length of the specimens being tested is capable of being observed
26、from outside the re test chamber. a The operation and calibration of this equipment is based on the use of A. P. Green G-26 refractories. b Vycor, 100 percent silica glass, nominal 1/4 inch (6.4 mm) thick or equivalent, is capable of being used for the inside pane. Pyrex glass, nominal 1/4 inch thic
27、k, or equivalent is capable of being used for the outer pane. 3.1.2 The ledges are to be fabricated of structural metal. Water-cooled structural-steel tubing is capable of being used for this purpose. 3.1.3 To provide air turbulence for combustion, turbulence-inducing baffling is to be provided by p
28、ositioning six refractory re bricks a long dimension vertical and 4-1/2-inch (114-mm) dimension parallel to the wall along the side walls of the chamber at distances of 7, 12, and 20 1/2 foot (2.1, 3.7, and 6.1 0.2 m) on the window side and 4-1/2, 9-1/2, and 16 1/2 foot (1.4, 2.9, and 4.9 0.22 m) on
29、 the opposite side. 3.1.4 The top is to consist of a removable metal-and-mineral-insulation composite unit whose insulation consists of nominal 2-inch-thick (50-mm) mineral-composition material. The top unit is shown in Figure 3.2 and is to completely cover the re test chamber. The mineral-compositi
30、on material shall have physical characteristics comparable to the following: a) Maximum effective temperature 1200F (649C), b) Bulk Density 21.0 1.55 pounds per cubic feet (336 24 kgm/m 3 ), and c) Thermal conductivity 0.50 0.71 Btu (thermochemical) inch per hour square foot F (0.0722 0.102 W/m K) a
31、t 300 700F (149 371C). The entire top-panel unit is to be protected with at sections of high-density nominally 110 pounds per cubic foot (1761 kg/m 3 ), 1/4 inch (6.3 mm) thick mineral-ber/cement board maintained in an unwarped and uncracked condition through continued replacement. While in place, t
32、he top panel is to be completely sealed against the leakage of air into the re test chamber during the test. This is generated text for gtxt. OCTOBER 15, 2004 UL 1820 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.5 The ladder-type tra
33、y used to support the test specimens is shown in Figures 3.2 and 3.3. The tray is to be fabricated from cold-rolled steel, 50,000 psi minimum (350 MPa) tensile strength. The solid-bar-stock side rails are to be as shown in Section S-S in Figure 3.3. The C-shaped channel rungs are to be as shown in S
34、ection Q-Q in Figure 3.3. Each rung is to be 11-1/4 inches (286 mm) long. The rungs are to be welded to the side rails 9 inches (229 mm) on centers along the tray length. The tray is to consist of one or several sections having a total assembled length of 23.9 feet (7.28 m) and is to be supported wi
35、th 16 supports equally spaced along the length of the tray. The supports (see Figure 3.3) are to be fabricated from bar steel. 3.1.6 One end of the test chamber, designated as the re end in Figure 3.1, is to be provided with two gas burners delivering ames upward that engulf the test specimens. As s
36、hown in Figure 3.2, the burners are to be positioned transversely to each side of the centerline of the furnace so that the ame is evenly distributed over the width of the specimens. This is generated text for gtxt. Figure 3.1 Details of re-test chamber NOTE See Figure 3.2 for Section B-B OCTOBER 15
37、, 2004 UL 1820 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 3.2 Section B-B NOTE See Figure 3.3 for details of the tray and supports OCTOBER 15, 2004 UL 1820 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIST
38、RIBUTION WITHOUT PERMISSION FROM UL 3.1.7 The controls used to maintain a constant ow of gas to the burners are to consist of: a) A pressure regulator, b) A gas meter calibrated to read in increments of not more than 0.1 cubic feet (2.88 mm 3 ), c) A gauge to indicate gas pressure in inches of water
39、 (Pa), d) A quick-acting gas-shutoff valve, e) A gas-metering valve, and f) An orice plate in combination with a manometer to assist in maintaining uniform gas-ow conditions. An air intake tted with a vertically sliding shutter extending the entire width of the test chamber is to be provided at the
40、re end. The shutter is to be positioned to provide an air-inlet port as shown in Figure 3.1. 3.1.8 The other end of the test chamber, designated as the vent end in Figure 3.1, is to be tted with a rectangular-to-round transition piece, which in turn is to be tted to a round ue pipe. The movement of
41、air is to be by induced draft. The draft-inducing system is to have a total draft capacity of at least 0.15 inch of water (37 Pa) with the specimens in place, with the shutter at the re end open to its normal position, and with the damper (see Section CC in Figure 3.1) in the wide-open position. A d
42、raft-gauge manometer to indicate static pressure is to be inserted through the top at the midwidth of the tunnel, just downstream of the air-intake shutter (see Figure 3.1). 3.1.9 The damper is to be installed in the vent pipe downstream of the smoke-indicating attachment prescribed in 3.2.1. 3.1.10
43、 An automatic draft-regulator controller is to be mounted in the vent pipe downstream of the manual damper. When required, other manual, automatic, or special draft-regulation devices are to be incorporated to maintain air-ow control throughout each test run. 3.1.11 The room in which the test chambe
44、r is located is to have provision for a free inow of air to maintain the room at atmospheric pressure throughout each test run. This is generated text for gtxt. OCTOBER 15, 2004 UL 1820 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.2 Sm
45、oke measurement 3.2.1 A light source c is to be mounted on a horizontal section of the vent pipe at a point at which it is preceded by a straight run of round pipe at least 12 diameters or 16 feet (4.88 m) from the vent end of the rectangular-to-round transition section, and it is not affected by am
46、e from the test chamber. The light beam is to be directed upward along the vertical axis of the vent pipe. The vent pipe is to be insulated with high-temperature mineral-composition material from the vent end of the chamber to the photometer location. A photoelectric cell c having an overall light-t
47、o-cell path length of 36 2 inches (914 51 mm), 16 inches (406 mm) of which are taken up by the smoke in the vent-pipe interior as shown in Section CC of Figure 3.1. The cell is to be connected to recording devices for indicating changes in the attenuation of incident light by passing smoke, by parti
48、culate matter, and by other effluents. c A meter capable of being used for this purpose is a Weston Instruments No. 856BB, photronic cell and 12-volt sealed beam, clear lens, auto spot lamp, with an overall light-to-cell path length of 36 4 inches (914 102 mm). 3.2.2 The output of the photoelectric
49、cell is to be connected to a recording device that processes the signal into a continuous record of smoke obscuration according to the following formula: Figure 3.3 Details of steel tray and supports OCTOBER 15, 2004 UL 1820 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL in which: T o is the initial light transmission (without smoke) and T is the light transmis
