1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2846 Fire Test of Plastic Water Distribution Plumbing Pipe for Visible Flame and Smoke Characteristics STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR D
2、ISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Fire Test of Plastic Water Distribution Plumbing Pipe for Visible Flame and Smoke Characteristics, UL 2846 First Edition, Dated
3、May 30, 2014 Summary of Topics The following revisions are being issued for the Standard for Fire Test of Plastic Water Distribution Plumbing Pipe for Visible Flame and Smoke Characteristics, UL 2846: 1. Scope of Products Covered by UL 2846 Text that has been changed in any manner or impacted by ULs
4、 electronic publishing system is marked with a vertical line in the margin. The revised requirements are substantially in accordance with Proposal(s) on this subject dated June 24, 2016 and October 28, 2016. All rights reserved. No part of this publication may be reproduced, stored in a retrieval sy
5、stem, 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 warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantabili
6、ty 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, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized U
7、L representative has been advised of the possibility of such damage. In no event shall ULs liability 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
8、harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. DECEMBER 20, 2016 UL 2846 tr1UL COPYRIGHTED M
9、ATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL DECEMBER 20, 2016 UL 2846 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 30, 2014 (Title Page Reprinted: December 20, 201
10、6) 1 UL 2846 Standard for Fire Test of Plastic Water Distribution Plumbing Pipe for Visible Flame and Smoke Characteristics First Edition May 30, 2014 This ANSI/UL Standard for Safety consists of the First Edition including revisions through December 20, 2016. The most recent designation of ANSI/UL
11、2846 as an American National Standard (ANSI) occurred on December 20, 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 submitte
12、d via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at https:/. 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 rega
13、rding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 2846-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 30, 2014 UL 2846 2 No Text on This PageUL COPYRIGHTE
14、D 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 4 3.1 Fire test chamber .4 3.2 Smoke measurement 10 3.3 Temperature measurement
15、 .11 4 Test Specimens .11 5 Calibration of Test Equipment .11 6 Test Procedure 17 REPORT 7 General .18 MAY 30, 2014 UL 2846 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 determining value
16、s of ame propagation distance and optical smoke density for individual pairs of plastic plumbing pipes for distribution of potable water, water used for hydronic heating and cooling applications, water reclaim/reuse water applications. 1.2 This test method addresses uninsulated pipe sizes 4 in. (10.
17、2 cm) and less in diameter. This test method also addresses insulated pipe assemblies which, based on the end use, can include thermal insulation. The overall sizes of these pipe assemblies are to be 5 inches (12.7 cm) and less in diameter. 1.3 This test method does not cover plastic pipes when inst
18、alled adjacent (side to side) in quantities greater than two. 1.4 This test method does not cover the construction requirements for plastic plumbing pipe for pressure or other performance requirements 2 General 2.1 Units of measurement 2.1.1 Values stated without parentheses are the requirement. Val
19、ues in parentheses are explanatory or approximate information. 2.2 Undated references 2.2.1 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. PERFORMANCE 3 Test Assembly 3.1 Fir
20、e test chamber 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 bricks a . One side is to be provid
21、ed with a row of 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
22、 being observed 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, nomin
23、al 1/4 inch thick or equivalent, is capable of being used for the outer pane. This is generated text for gtxt. DECEMBER 20, 2016 UL 2846 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.2 The ledges are to be fabricated of structural met
24、al. 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 positioning six refractory re bricks a long dimension vertical and 4-1/2-inch (114-mm) dimension parallel to the wall
25、 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 0.2 m) on the opposite side. 3.1.4 The top is to consist of a removable metal- and mineral-insulation composite unit having i
26、nsulation consisting of nominal 2-inch (50-mm) thick mineral-composition material. The top unit shown in Figure 3.2 and is to completely cover the re test chamber. The mineral-composition material is to have physical characteristics comparable to the following: a) Maximum effective temperature 1200F
27、 (649C). b) Bulk Density 21.0 1.55 pounds per cubic foot (336 24 kg/m 3 ). Figure 3.1 Details of re-test chamber See Figure 3.2 for Section B-B MAY 30, 2014 UL 2846 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL c) Thermal conductivity 0.5
28、0 0.71 Btu (thermochemical) inch per hour square foot F (0.0722 0.102 W/m K) at 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 unw
29、arped and uncracked condition through continued replacement. While in place, the 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. MAY 30, 2014 UL 2846 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
30、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 3.2 Section B-B See Figure 3.3 for details of the tray and supports. MAY 30, 2014 UL 2846 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.5 The ladder-type tray used to support the
31、 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 Figure 3.3. The C-shaped channel rungs are to be as shown in Figure 3.3. Each rung is to be 11-1/4
32、 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 capable of consisting of several sections having a total assembled length of 23.9 feet (7.28 m) and is to be supported with 16 supports equally spaced along the length
33、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 shown in Figure 3.2, the burners are to be posit
34、ioned transversely to each side of the centerline of the furnace so that the ame is evenly distributed over the width of the specimens. 3.1.7 The controls used to maintain a constant ow of gas to the burners are to consist of a pressure regulator; a gas meter calibrated to read in increments of not
35、more than 0.1 cubic foot (2.88 mm 3 ); a gauge to indicate gas pressure in inches of water (Pa); a quick-acting gas-shutoff valve; a gas-metering valve; and an orice plate in combination with a manometer to assist in maintaining uniform gas-ow conditions. An air intake tted with a vertically-sliding
36、 shutter extending the entire width of the test chamber is to be provided at the 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 t
37、ransition piece which, in turn, is to be tted to a round ue pipe. The movement of 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,
38、 and with the damper (see Section C-C in Figure 3.1) in the wide-open position. A draft-gauge manometer to indicate static pressure is to be inserted through the top at the mid-width 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
39、 vent pipe downstream of the smoke-indicating attachment specied in 3.2.1. This is generated text for gtxt. MAY 30, 2014 UL 2846 8UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 3.3 Details of steel tray and supports MAY 30, 2014 UL 2
40、846 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.10 An automatic draft-regulator controller is to be mounted in the vent pipe downstream of the manual damper. Other manual-, automatic-, or special draft-regulation devices are to be i
41、ncorporated to maintain air-ow control throughout each test run. 3.1.11 The room in which the test chamber is located is to have provision for a free inow of air to maintain the room at atmospheric pressure throughout each test run. 3.2 Smoke measurement 3.2.1 A light source c is to be mounted on a
42、horizontal section of the vent pipe at a point at which it is: a) 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 b) Not affected by ame from the test chamber. The light beam is to be directed upw
43、ard 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 d having an overall light-to-cell path length of 36 2 inches (914 51mm), 16 inches (406
44、 mm) of which are taken up by the smoke in the vent-pipe interior as shown in Section C-C 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, particulate matter, and other effluents. c A General Electric Model
45、4405, 12-volt, sealed-beam, clear auto spot lamp or equivalent is capable of being used for this purpose. d A Weston Instruments No. 856BB photronic cell with an overall light-to-cell path length of 36 2 inches (91451 mm), or its equivalent is capable of being used for this purpose. 3.2.2 The output
46、 of the photoelectric 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: in which: T o is the initial light transmission (without smoke) and T is the light transmission during the test (T varies wi
47、th the amount of smoke). MAY 30, 2014 UL 2846 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.3 Temperature measurement 3.3.1 An 18 AWG thermocouple nominal wire cross section of 1620 cmil (0.823 mm 2 ) with 0.3750.125 inch (10 3 mm) of
48、the junction exposed in the re chamber air is to be inserted through the oor of the test chamber so that the tip is 1.0 0.031 inch (25 1 mm) below the top surface of the gasketing tape and 23 feet 1/2 inch (7.09 m 13mm) from the centerline of the burner ports, and at the center of the width of the c
49、hamber. 3.3.2 An 18 AWG thermocouple nominal wire cross section of 1620 cmil (0.823 mm 2 ) embedded 1/8 inch (3.2 mm) below the oor surface of the test chamber is to be mounted in refractory or Portland cement (carefully dried to keep it from cracking) at distances of 13-1/2 and 23 feet (3.96 and 7.09 m) from the re end of the burner ports. 4 Test Specimens 4.1 Two 24 foot (7.32 m) lengths of plastic pipe, less than or equal to 4 inches
