UL-2221-BULLETINS-2003.pdf

Subject 2221 (In reply, refer to Subject 2221)12 Laboratory Drive Research Triangle Park, NC 27709 November 4, 2003 TO:Standards Technical Panel (STP) for Grease Ducts (STP 1978); Subscribers to ULs Standards Service for Tests of Fire Resistive Grease Duct Enclosure Assemblies, UL 2221; Other Interested Parties SUBJECT:Request for ANSI Approval of the First Edition of the Standard for Tests of Fire Resistive Grease Duct Enclosure Assemblies, UL 2221; INSTRUCTIONS STP Members: If you are a voting member of the STP, complete the attached ballot with your vote on the standard. Please note that all negative ballots must be accompanied by supporting written reasons and, where possible, proposals for a solution to the problem raised. Subscribers and other interested parties: If you are a subscriber or other interested party, your comments concerning the ANSI approval of UL 2221 should be forwarded to the STP Secretary. The STP member ballot should not be used to submit your comments. Comments should be made in writing and may be sent by fax to (919) 316-5629 or by mail to the attention of Tori Burnett at ULs Research Triangle Park office. Comments may also be sent via E-mail to Victoria.Burnettus.ul.com. Please reference all correspondence to Subject 2221. Note all comments received are public and may be circulated to others. If you respond by fax or E-mail, please include your full name and company name and address to ensure a reply. SUMMARY OF TOPICS This bulletin contains the fi rst edition of UL 2221, Tests of Fire Resistive Grease Duct Enclosure Assemblies. UL is seeking fi rst time recognition of UL 2221 as an American National Standard. No changes, editorial or otherwise, have been made to UL 2221. STP BALLOTS AND ALL COMMENTS DUE: December 2, 2003 Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 23:02:31 MDTNo reproduction or networking permitted without license from IHS -,-,- Attached as Appendix A for your review and comment is the First Edition of UL 2221. Attached as Appendix B is the STP membership roster. Attached as Appendix C and D is the STP ballot. Questions regarding interpretation of requirements should be directed to the responsible UL Staff. Please see Appendix E of this bulletin regarding designated responsibility for the subject product categories. UNDERWRITERS LABORATORIES INC. TORI BURNETT Secretary for STP 1978 Standards Department Underwriters Laboratories Inc. RESEARCH TRIANGLE PARK DIVISION Phone: (919) 549-1426 Fax: (919) 316-5629 E-mail: Victoria.Burnettus.ul.com http:/ulstandardsinfonet.ul.com REVIEWED BY: DAN RYAN Chair for STP 1978 Corporate Standards Underwriters Laboratories Inc. RESEARCH TRIANGLE PARK DIVISION Phone: (919) 549-1658 Fax: (919) 547-6399 E-mail: Daniel.P.Ryanus.ul.com Copyright © 2003 Underwriters Laboratories Inc. SR: JAH bul-2221.1_20031002 NOVEMBER 4, 2003SUBJECT 2221-2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 23:02:31 MDTNo reproduction or networking permitted without license from IHS -,-,- APPENDIX A THE FIRST EDITION OF THE STANDARD FOR TESTS OF FIRE RESISTIVE GREASE DUCT ENCLOSURE ASSEMBLIES, UL 2221 NOVEMBER 4, 2003SUBJECT 2221-A1- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 23:02:31 MDTNo reproduction or networking permitted without license from IHS -,-,- CONTENTS INTRODUCTION 1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A4 2 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A5 2.1 Units of measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A5 2.2 Undated references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A5 3 Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A5 PERFORMANCE MATERIAL REQUIREMENTS 4 Surface Burning Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A6 4.1 Test method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A6 4.2 Performance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A6 5 Serviceability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A6 5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A6 5.2 Hot-Surface Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A6 5.3 Steady-State Thermal Transmission Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A7 6 Noncombustibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A7 6.1 Test method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A7 6.2 Performance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A8 ASSEMBLY REQUIREMENTS 7 Internal Fire Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A8 7.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A8 7.2 Test specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A8 7.3 Temperature exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A10 7.4 Temperature measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A12 7.5 Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A18 7.6 Conduct of fi re test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A19 7.7 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A20 8 External Fire Tests, General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A21 8.1 Conditioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A21 8.2 Furnace control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A21 8.3 Temperature measurements on test specimen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A25 8.4 Protection of test assembly and test equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A25 8.5 Integrity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A25 8.6 Observations during and after the test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A26 9 External Fire Test, Fire Engulfment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A26 9.1 Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A26 9.2 Duct pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A29 9.3 Conduct of fi re test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A29 9.4 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A29 10 External Fire Test, Firestop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A29 10.1 Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A29 10.2 Duct pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A30 10.3 Temperature measurements on test assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A30 10.4 Conduct of fi re test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A31 NOVEMBER 4, 2003SUBJECT 2221-A2- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 23:02:31 MDTNo reproduction or networking permitted without license from IHS -,-,- 10.5 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A31 11 Hose Stream Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A32 11.1 Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A32 11.2 Conduct of test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A32 11.3 Acceptance criteria . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A33 12 Assembly Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A33 12.1 Conditions of acceptance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A33 12.2 Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A33 REPORT 13 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A34 APPENDIX A Standard Time-Temperature Curve for Control of Fire Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A36 APPENDIX B Requirements for Thermocouple Pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A38 NOVEMBER 4, 2003SUBJECT 2221-A3- Copyright Underwriters Laboratories Inc. Provided by IHS under license with ULLicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/16/2007 23:02:31 MDTNo reproduction or networking permitted without license from IHS -,-,- INTRODUCTION 1 Scope 1 effective September 17, 2002 1.1 These tests are intended to determine the fi re resistance of grease duct enclosure assemblies. These requirements limit the combustibility, the surface fl ammability, and the smoke generation potential of the coverings used to enclose the grease duct. In addition, these requirements evaluate the effectiveness of the combination of the grease duct and the enclosure as a fi re rated enclosure system and through penetration fi restop system, as well as the enclosures effect on the grease duct. 1.2 The fi re endurance ratings for grease duct enclosure assemblies are intended to register performance during the period of fi re exposure and are not intended to be interpreted as having determined the acceptability of the grease duct assembly for use before or after fi re exposure. The intent of these methods is to develop data to assist others in determining the suitability of the grease duct assembly where fi re resistance is required. 1.3 These requirements are intended to evaluate the ability of grease duct enclosure assemblies specifi ed in 1.1 to contain an internal fi re or repel an external fi re during predetermined test exposures. The test evaluates the grease duct assemblys resistance to fi re, heat, and to a hose stream. 1.4 Requirements covering the construction and performance requirements of proprietary grease ducts are contained in the Standard for Grease Ducts, UL 1978. All ducts, both proprietary and non-proprietary, shall comply with installation requirements of the Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, NFPA 96, and the International Mechanical Code. 1.5 Under these requirements a grease duct enclosure assembly is subjected to standard internal and external fi re exposures controlled to achieve specifi ed temperatures throughout a specifi ed time period. 1.6 During the internal fi re exposure, one of two installation condition methods is to be selected to measure temperatures near or on the surface of the grease duct enclosure material away from the grease duct. One method of temperature measurement is intended for all installations except for installations within non-ventilated combustible enclosures. The second method of temperature measurement is intended for installations within non-ventilated combustible enclosures. 1.7 These exposures by themselves are not intended to be representative of all fi re conditions; conditions vary with changes in the amount, nature, and distribution of fi re loading, ventilation, compartment size and confi guration, and heat sink characteristics of the compartment. 1.8 These requirements cover the measurement of the transmission of heat through the grease duct assembly and the passage of heat and gases hot enough to ignite cotton waste. 1.9 These requirements provide a relative measure of fi re performance under these specifi ed fi re exposure conditions. Any variation from the construction or conditions that are tested, such as method of assembly and materi