1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL 2221Tests of Fire Resistive GreaseDuct Enclosure AssembliesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT
2、AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUL Standard for Safety for Tests of Fire Resistive Grease Duct Enclosure Assemblies, UL 2221Second Edition, Dated August 13, 2010Summary of TopicsThis New Edition of UL 2221 includes editorial revisions such as reference up
3、dates,re-organization of sections, renumbering, and pagination. These revisions are considered to benon-substantive and not subject to ULs STP process.All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form by any means, electronic,
4、 mechanical photocopying, recording, or otherwisewithout prior permission of UL.UL provides this Standard as is without warranty of any kind, either expressed or implied, including butnot limited to, the implied warranties of merchantability or fitness for any purpose.In no event will UL be liable f
5、or any special, incidental, consequential, indirect or similar damages,including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or theinability to use this Standard, even if UL or an authorized UL representative has been advised of thepossibility of such
6、damage. In no event shall ULs liability for any damage ever exceed the price paid forthis Standard, regardless of the form of the claim.Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold ULharmless from and against any loss, expense, liability, damage,
7、claim, or judgment (including reasonableattorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronicStandard on the purchasers computer system.The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures,and/
8、or other elements of the Standard having future effective dates as indicated in the note following theaffected item. The prior text for requirements that have been revised and that have a future effective dateare located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice.AUGUST
9、 13, 2010 UL 2221 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAUGUST 13, 2010 UL 2221tr2No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAUGUST 13, 20101UL 2221
10、Standard for Tests of Fire Resistive Grease Duct Enclosure AssembliesFirst Edition September, 2001Second EditionAugust 13, 2010Comments or proposals for revisions on any part of the Standard may besubmitted to UL at any time. Proposals should be submitted via a ProposalRequest in ULs On-Line Collabo
11、rative Standards Development System (CSDS)at http:/.ULs Standards for Safety are copyrighted by UL. Neither a printed nor electroniccopy of a Standard should be altered in any way. All of ULs Standards and allcopyrights, ownerships, and rights regarding those Standards shall remain thesole and exclu
12、sive property of UL.COPYRIGHT 2010 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAUGUST 13, 2010TESTS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES - UL 22212No Text on This PageUL COPYRIGHTED MATERIAL NOT
13、AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSINTRODUCTION1 Scope .52 Units of Measurement .63 Undated References 64 Glossary .6PERFORMANCEMATERIAL REQUIREMENTS5 Surface Burning Characteristics .75.1 Test method .75.2 Performance criteria 76 Serviceability .76.
14、1 General .76.2 Hot-surface performance 76.3 Steady-state thermal transmission properties 87 Noncombustibility .87.1 Test method .87.2 Performance criteria 9ASSEMBLY REQUIREMENTS8 Internal Fire Test 98.1 General .98.2 Test specimen .98.3 Temperature exposure .118.4 Temperature measurements 138.5 Int
15、egrity 198.6 Conduct of fire test 208.7 Acceptance criteria 219 External Fire Tests, General 229.1 Conditioning 229.2 Furnace control .229.3 Temperature measurements on test specimen 269.4 Protection of test assembly and test equipment .269.5 Integrity 269.6 Observations during and after the test .2
16、710 External Fire Test, Fire Engulfment .2710.1 Sample .2710.2 Duct pressure 2910.3 Conduct of fire test .2910.4 Acceptance criteria .2911 External Fire Test, Firestop 2911.1 Sample .2911.2 Duct pressure 3011.3 Temperature measurements on test assembly .3011.4 Conduct of fire test .3111.5 Acceptance
17、 criteria .31AUGUST 13, 2010 TESTS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES - UL 2221 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL12 Hose Stream Test 3212.1 Test method .3212.2 Acceptance criteria .3213 Assembly Rating 3313.1 Co
18、nditions of acceptance .3313.2 Correction .33REPORT14 General 34APPENDIX AA.1 Standard Time-Temperature Curve for Control of Fire Tests A1APPENDIX BB.1 Requirements for Thermocouple Pads B1AUGUST 13, 2010TESTS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES - UL 22214UL COPYRIGHTED MATERIAL NOT A
19、UTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These tests are intended to determine the fire resistance of grease duct enclosure assemblies. Theserequirements limit the combustibility, the surface flammability, and the smoke generation potential o
20、f thecoverings used to enclose the grease duct. In addition, these requirements evaluate the effectiveness ofthe combination of the grease duct and the enclosure as a fire rated enclosure system and throughpenetration firestop system, as well as the enclosures effect on the grease duct.1.2 The fire
21、endurance ratings for grease duct enclosure assemblies are intended to register performanceduring the period of fire exposure and are not intended to be interpreted as having determined theacceptability of the grease duct assembly for use before or after fire exposure. The intent of thesemethods is
22、to develop data to assist others in determining the suitability of the grease duct assemblywhere fire resistance is required.1.3 These requirements are intended to evaluate the ability of grease duct enclosure assembliesspecified in 1.1 to contain an internal fire or repel an external fire during pr
23、edetermined test exposures.The test evaluates the grease duct assemblys resistance to fire, heat, and to a hose stream.1.4 Requirements covering the construction and performance requirements of proprietary grease ductsare contained in the Standard for Grease Ducts, UL 1978. All ducts, both proprieta
24、ry and non-proprietary,shall comply with installation requirements of the Standard for Ventilation Control and Fire Protection ofCommercial Cooking Operations, NFPA 96, and the International Mechanical Code.1.5 Under these requirements a grease duct enclosure assembly is subjected to standard intern
25、al andexternal fire exposures controlled to achieve specified temperatures throughout a specified time period.1.6 During the internal fire exposure, one of two installation condition methods shall be selected tomeasure temperatures near or on the surface of the grease duct enclosure material away fr
26、om the greaseduct. One method of temperature measurement is intended for all installations except for installationswithin non-ventilated combustible enclosures. The second method of temperature measurement isintended for installations within non-ventilated combustible enclosures.1.7 These exposures
27、by themselves are not intended to be representative of all fire conditions; conditionsvary with changes in the amount, nature, and distribution of fire loading, ventilation, compartment size andconfiguration, and heat sink characteristics of the compartment.1.8 These requirements cover the measureme
28、nt of the transmission of heat through the grease ductassembly and the passage of heat and gases hot enough to ignite cotton waste.1.9 These requirements provide a relative measure of fire performance under these specified fireexposure conditions. Any variation from the construction or conditions th
29、at are tested, such as method ofassembly and materials, is not within the scope of this test method.1.10 The results of these tests represent one factor in assessing fire performance of grease ductassemblies. These requirements prescribe standard fire exposures for assessing the performance ofgrease
30、 duct assemblies. Application of these test results to predict the performance of actual buildingconstruction requires careful evaluation of test data.AUGUST 13, 2010 TESTS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES - UL 2221 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O
31、RDISTRIBUTION WITHOUT PERMISSION FROM UL2 Units of Measurement2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory orapproximate information.3 Undated References3.1 Any undated reference to a code or standard appearing in the requirements of this standard
32、shall beinterpreted as referring to the latest edition of that code or standard.4 Glossary4.1 For the purpose of these requirements, the following definitions apply.4.2 FIRESTOP Materials, including the grease duct, that fill the opening where the grease ductpasses through the supporting constructio
33、n.4.3 GREASE DUCT The duct shall:a) Be constructed of steel not less than 0.055 inch (1.40 mm) in thickness, orb) Be constructed of stainless steel not less than 0.044 inch (1.12 mm) in thickness, orc) Comply with the requirements of the Standard for Grease Ducts, UL 1978.The duct shall comply with
34、requirements of nationally recognized standards and codes such as theStandard for Ventilation Control and Fire Protection of Commercial Cooking Operations, NFPA 96, andthe International Mechanical Code.4.4 GREASE DUCT ENCLOSURE MATERIALS The insulating materials surrounding the greaseduct assembly.
35、The grease duct enclosure materials also include adhesives, encapsulating materials,facers, fasteners, and banding required to secure the insulating materials in place.4.5 SUPPORTING CONSTRUCTION A floor slab that seals the top of the furnace from which thegrease duct assembly is suspended.4.6 TEST
36、ASSEMBLY The combination of the test specimen and the supporting construction.4.7 TEST SPECIMEN An enclosed grease duct and, when the grease duct is suspended from thesupporting construction, the firestop.4.8 UNEXPOSED SURFACE The surface of the test specimen exposed to ambient air.AUGUST 13, 2010TE
37、STS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES - UL 22216UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULPERFORMANCEMATERIAL REQUIREMENTS5 Surface Burning Characteristics5.1 Test method5.1.1 The grease duct enclosure materials includin
38、g adhesives, encapsulating materials, and facers shallbe evaluated in accordance with the Standard for Test for Surface Burning Characteristics of BuildingMaterials, UL 723. (The requirements contained in UL 723 are also in the Standard Method of Test ofSurface Burning Characteristics of Building Ma
39、terials, NFPA 255, and the Standard Test Method forSurface Burning Characteristics of Building Materials, ASTM E84).5.2 Performance criteria5.2.1 The grease duct enclosure materials shall have a flame spread value of 25 or less.5.2.2 The grease duct enclosure materials shall have a smoke developed v
40、alue of 50 or less.6 Serviceability6.1 General6.1.1 The serviceability of the insulating material used in the grease duct enclosure is to be determinedby tests conducted in accordance with the Standard Test Method for Hot-Surface Performance ofHigh-Temperature Thermal Insulation, ASTM C411, and the
41、Standard Test Method for Steady-StateThermal Transmission Properties by Means of the Heat Flow Meter Apparatus, ASTM C518.6.2 Hot-surface performance6.2.1 The grease duct insulation system including adhesives, encapsulating materials, and facers shall besubjected to a service temperature in accordan
42、ce with the Standard Test Method for Hot-SurfacePerformance of High-Temperature Thermal Insulation, ASTM C411. The service temperature shall be thetemperature on the face of the grease duct enclosure material nearest the grease duct when equilibrium,as described in 8.6.1, is obtained during the inte
43、rnal fire test. The service temperature shall not exceed500F (260C) nor shall the ASTM C411 test temperature fall below 250F (121C) as specified inParagraph 604.3 of the International Mechanical Code.6.2.2 The grease duct enclosure materials shall not flame, glow, smolder or smoke.AUGUST 13, 2010 TE
44、STS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES - UL 2221 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.3 Steady-state thermal transmission properties6.3.1 Test method6.3.1.1 Eight samples of the insulation material used in the gre
45、ase duct enclosure are required.6.3.1.2 The thickness of the samples is to be that of a single layer of insulation material used to constructthe test specimens for the internal and external fire tests.6.3.1.3 All samples are to be conditioned for a minimum of 24 hours at 75 5F (23.8 2.7C) at a relat
46、ivehumidity of 50 5 percent.6.3.1.4 Four samples are to be placed vertically in a rack with a space between each sample ranging from3/8 inch to 3/4 inch (from 9 mm to 19 mm). The rack is to be placed in an air circulating oven preheatedto 500 5F (260 2.7C) for a minimum 12-hour period. The oven is s
47、hut off and the samples allowed tocool at 75 5F (23.8 2.7C) for a minimum 12-hour period. This cycle is to be repeated 10 times. Afterthe tenth cycle, the samples are to be removed from the oven and allowed to cool for an additionalminimum 12-hour period.6.3.2 Performance criteria6.3.2.1 When tested
48、 in accordance with the Standard Test Method for Steady-State ThermalTransmission Properties by Means of the Heat Flow Meter Apparatus, ASTM C518, the average changein thermal conductivity of the four samples placed in the oven shall not be greater than 10 percent of theaverage thermal conductivity
49、of the four samples not placed in the oven. The oven shall be maintained ata temperature equal to the temperature on the face of the grease duct enclosure materials nearest thegrease duct when equilibrium, as described in 8.6.1, is obtained during the internal fire test. The oventemperature shall not be greater than 500F (260C).7 Noncombustibility7.1 Test method7.1.1 Insulation materials without surface adhesives, encapsulating materials, and facers shall beevaluated in accordance with the Standard Test Method for B
