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 CharacteristicsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
2、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 May 30, 2014 Summary
3、 of Topics This rst edition of UL 2846 is being published as an American National Standard. Text that has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and
4、 are followed by an effective date note indicating the date of publication or the date on which the changed requirement becomes effective. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated December 13, 2013 and March 14, 2014. All rights reserved
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7、e 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 liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic vers
8、ions 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 reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the
9、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. The prior text for requirements that have b
10、een revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. MAY 30, 2014 UL 2846 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 30, 2014 UL 2846 tr2 No Text
11、on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 30, 2014 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 Standar
12、d for Safety consists of the First Edition. The most recent designation of ANSI/UL 2846 as an American National Standard (ANSI) occurred on May 30, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals
13、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 System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a St
14、andard 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. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 2846-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODU
15、CTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL MAY 30, 2014 UL 2846 2 No Text on This PageUL COPYRIGHTED 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 PE
16、RFORMANCE 3 Test Assembly 4 3.1 Fire test chamber .4 3.2 Smoke measurement 10 3.3 Temperature measurement .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 DIS
17、TRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 This is a test method for determining values of ame propagation distance and optical smoke density for individual pairs of plastic plumbing pipes for distribution of potable water that can be installed in ducts, plenums, and other spaces
18、used for environmental air. 1.2 This test method addresses pipe sizes 4 in. and less in diameter. 1.3 This test method does not cover plastic pipes when installed adjacent (side to side) in quantities greater than two. 1.4 This test method does not cover the construction requirements for plastic plu
19、mbing pipe for pressure or other performance requirements 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 appeari
20、ng 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 Fire 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 b
21、ase 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 provided 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
22、 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 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 ref
23、ractories. 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 thick or equivalent, is capable of being used for the outer pane. This is generated text for gtxt. MAY 30, 2014 UL 2846 4UL COPYRIG
24、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 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-indu
25、cing 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 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
26、/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 insulation 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 r
27、e test chamber. The mineral-composition material is to have physical characteristics comparable to the following: a) Maximum effective temperature 1200F (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
28、30, 2014 UL 2846 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL c) Thermal conductivity 0.50 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 wi
29、th 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, the top panel is to be completely sealed against the leakage of air int
30、o 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 REPRODUCTION 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 7U
31、L COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.5 The ladder-type tray 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.
32、 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 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 consi
33、sting 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 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 Figur
34、e 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 positioned 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 co
35、ntrols 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 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 va
36、lve; 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 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 por
37、t 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 air is to be by induced draft. The draft-inducing system is to hav
38、e 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 C-C in Figure 3.1) in the wide-open position. A draft-gauge manometer to indicate static pressure is to be inserte
39、d 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 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 MAT
40、ERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Figure 3.3 Details of steel tray and supports MAY 30, 2014 UL 2846 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 3.1.10 An automatic draft-regulator
41、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 incorporated 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 fre
42、e 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 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)
43、 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 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
44、 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 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 de
45、vices for indicating changes in the attenuation of incident light by passing smoke, particulate matter, and other effluents. c A General Electric Model 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
46、 cell with an overall light-to-cell path length of 36 2 inches (914 51 mm), or its equivalent is capable of being used for this purpose. 3.2.2 The output of the photoelectric cell is to be connected to a recording device that processes the signal into a continuous record of smoke obscuration accordi
47、ng 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 with the amount of smoke). MAY 30, 2014 UL 2846 10UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
48、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 0.375 0.125 inch (10 3 mm) of 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
49、 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 chamber. 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 distan
