1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2790 Commercial IncineratorsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRO
2、DUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Commercial Incinerators, UL 2790 First Edition, Dated November 8, 2010 Summary of Topics This revision to ANSI/UL 2790 is being issued to remove the reference to the withdrawal date of UL 873 and to address universal upkee
3、p of UL Standards for Safety. These revisions are considered to be non-substantive and not subject to ULs STP process. 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 vert
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9、ons, 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that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED
10、REQUIREMENTS notice. OCTOBER 8, 2014 UL 2790 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL OCTOBER 8, 2014 UL 2790 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
11、N FROM UL NOVEMBER 8, 2010 (Title Page Reprinted: October 8, 2014) 1 UL 2790 Standard for Commercial Incinerators Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Commercial Incinerators, SU 2790. First Edition Nov
12、ember 8, 2010 This ANSI/UL Standard for Safety consists of the First Edition including revisions through October 8, 2014. The most recent designation of ANSI/UL 2790 as a Reaffirmed American National Standard (ANS) occurred on June 12, 2014. ANSI approval for a standard does not include the Cover Pa
13、ge, 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 Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs S
14、tandards 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 regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABOR
15、ATORIES INC. ANSI/UL 2790-2010 (R2014)UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 8, 2010 COMMERCIAL INCINERATORS - UL 2790 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WI
16、THOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 Components 6 3 Units of Measurement .7 4 Undated References 7 5 Glossary .7 CONSTRUCTION ELECTRICAL 6 General .13 7 Servicing and Adjustment .13 8 Enclosures 14 8.1 General 14 8.2 Accessibility of uninsulated live parts and lm-coated wire g
17、eneral .18 8.3 Doors and covers .21 8.4 Field wiring system connection 22 9 Field Wiring .23 9.1 General 23 9.2 Leads and terminals .25 10 Internal Wiring 26 10.1 General .26 10.2 Methods 27 10.3 Short-circuit protection 30 11 Separation of Circuits .30 12 Bonding for Grounding 32 13 Mounting of Ele
18、ctrical Components .35 14 Motors .36 14.1 General .36 14.2 Motor Overload Protection .39 15 Overcurrent Protection of High-Voltage Control-Circuit Conductors 42 15.1 General .42 15.2 Direct-connected high-voltage control circuit .42 15.3 Tapped high-voltage control circuits 42 15.4 Overcurrent-prote
19、ctive devices .43 16 Overcurrent Protection of Transformers 44 16.1 High-voltage transformers General 44 16.2 High-voltage transformers Thermal protection 44 16.3 High-voltage transformers Overcurrent protection .45 16.4 Low-voltage transformers General 45 16.5 Low-voltage transformers - Overcurrent
20、 protective devices 46 17 Switches and Controllers 46 18 Capacitors .47 19 Electrical Insulating Materials .48 20 High-Voltage Circuits 48 21 Low-Voltage Circuits 49 NOVEMBER 8, 2010 COMMERCIAL INCINERATORS - UL 2790 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WI
21、THOUT PERMISSION FROM UL CONSTRUCTION MECHANICAL 22 General 50 23 Corrosion Protection 55 24 Fuel Conning Parts 55 CONSTRUCTION INCINERATOR ASSEMBLY 25 General 56 26 Accessibility 57 27 Baffles.57 28 Temperature Controls .57 29 Bases .58 30 Incinerator Combustion Chambers 58 31 Ash Compartment 58 32
22、 Radiation Shields .59 33 Casings .59 34 Flue Collars 60 35 Chimneys 60 CONSTRUCTION BURNER ASSEMBLIES 36 General 62 37 Controls .64 38 Fan Housings and Air Tubes .65 39 Combustion Air Controls .65 40 Primary Safety Controls .67 40.1 General .67 40.2 Fuel pressure controls 69 41 Ignition Systems Gen
23、eral 70 42 Electric High-Tension Ignition 71 42.1 Spark igniters 71 42.2 Electrodes and bus bars 71 42.3 Insulators .71 42.4 Leads .72 42.5 Transformers 72 42.6 Gas pilots .73 43 Fittings and Piping 74 44 Valves and Regulators 77 44.1 Automatic safety shutoff valves 77 44.2 Manually operated valves
24、.78 44.3 Gas pressure regulators .78 45 Bleeds and Vents .79 PERFORMANCE 46 General 80 47 Test Installations 81 48 Instrumentation .83 48.1 Draft measurement .83 48.2 Power measurement 83 48.3 Temperature measurements 83 49 Test Methods 87 NOVEMBER 8, 2010 COMMERCIAL INCINERATORS - UL 2790 4UL COPYR
25、IGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 49.1 Firing conditions 87 49.2 Test voltages 87 50 Power Input Test Test No. 1 .87 51 Combustion Test No. 2 88 52 Burner Endurance Test No. 3 89 53 Combustion Air Failure Test No. 4 89 54 Undervoltage
26、Test No. 5 .90 55 Power Interruption Test No. 6 90 56 Pilot Supervision Test No. 7 91 57 Ignition, Gas-Electric High Tension Test No. 8 91 58 Delayed Ignition Test No. 9 92 59 Temperature Control Test No. 10 .92 60 Temperature Tests 92 60.1 General .92 60.2 Continuous operation Test No. 11 96 61 Sho
27、rt-Circuit Test No. 12 .97 62 Overload Test, High-Voltage Transformers Test No. 13 99 63 Burnout Test, High-Voltage Transformers Test No. 14 100 64 Dielectric Voltage-Withstand Test Test No. 15 .101 65 Strain Relief Test No. 16 102 66 Hydrostatic Strength Test No. 17 102 OUTDOOR-USE EQUIPMENT CONSTR
28、UCTION 67 General 102 68 Enclosures 103 69 Field Wiring Connections .105 70 Wiring 105 71 Electrical Insulation Material 106 PERFORMANCE 72 Rain Test Test No. 18 106 73 Wind Tests Test No. 19 109 74 Accelerated Aging Test Gaskets, Adhesives, and Sealing Compounds Test No. 20 . . . .110 75 Metallic C
29、oating Thickness Test Chromic Acid Dropping Test Test No. 21 111 MANUFACTURING AND PRODUCTION TESTS 76 General 112 MARKINGS 77 General 113 INSTRUCTIONS 78 General 116 NOVEMBER 8, 2010 COMMERCIAL INCINERATORS - UL 2790 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION W
30、ITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements apply to direct-fed incinerators, including those of the gas and electric ignition types, designed primarily for use as a crematory (as dened in 5.30). They are not intended to incinerate any hazardous, including biological/infect
31、ious, chemical and/or explosive, types of material and not intended for use in spaces in which ammable vapor or gases may be present. 1.2 These requirements are only intended to cover the safety aspect of the direct-fed incinerators, with respect to re, shock, mechanical hazards, and carbon monoxide
32、 emissions. 1.3 Crematories covered by these requirements are the factory-made type and may be eld assembled. These requirements do not cover an incinerator that requires the use of a brick or masonry wall, etc., which forms a part of the building structure. 1.4 Gas-heating incinerators covered by t
33、hese requirements may be operated without a competent attendant being constantly on duty at the burners while the burners are in operation. 1.5 Incinerators may be subject to local regulations and/or EPA regulations, such as the Clean Air Act and/or the Resource Conservation and Recovery Act, with r
34、espect to: a) Particulate emissions, oxides of nitrogen, and other products of combustion in the ue gas. These requirements do not include limitations on Nox emissions and only carbon monoxide was required to be within the specied limits. b) The types of wastes to be incinerated. 1.6 Additional inst
35、allation and operation requirements are available as dened by the National Fuel Gas Code, NFPA 54, the Liqueed Petroleum Gas Code, NFPA 58, the National Electrical Code, NFPA 70 and other codes as applicable. 2 Components 2.1 Except as indicated in 2.2, a component of a product covered by this Stand
36、ard shall comply with the requirements for that component. 2.2 A component need not comply with a specic requirement that: a) Involves a feature or characteristic not needed in the application of the component in the product covered by this Standard, or b) Is superseded by a requirement in this Stan
37、dard. 2.3 A component shall be used in accordance with its rating established for the intended conditions of use. NOVEMBER 8, 2010 COMMERCIAL INCINERATORS - UL 2790 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.4 Specic components are i
38、ncomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used only under those specic conditions. 3 Units of Measurement 3.1 Values stated
39、without parentheses are the requirement. Values in parentheses are explanatory or approximate information. 3.2 Unless indicated otherwise, all voltage and current values mentioned in this standard are rms. 4 Undated References 4.1 Any undated reference to a code or standard appearing in the requirem
40、ents of this Standard shall be interpreted as referring to the latest edition of that code or standard. 5 Glossary 5.1 For the purposes of this Standard the following denitions apply. 5.2 AIR SHUTTER An adjustable device for varying the size of the air inlet or inlets regulating primary or secondary
41、 air. 5.3 AIR SHUTTER, AUTOMATICALLY OPERATED An air shutter operated by an automatic control. 5.4 AIR SHUTTER, MANUALLY OPERATED An air shutter manually set and locked in the desired position. 5.5 ALUMINUM COATED STEEL An aluminum coated steel in which the bond between the steel and the aluminum is
42、 an iron-aluminum alloy. 5.6 ASH The solid residue remaining after combustion or incineration has been completed. 5.7 ASH PIT DOOR A door below the grate level used for removing ash or other noncombustibles from the incinerator. 5.8 BAFFLE An object placed in an incinerator to direct the ow of air o
43、r ue gases. 5.9 BASE The main supporting frame or structure of the assembly. 5.10 BURNER A device for the nal conveyance of the gas, or a mixture of gas and air, to the combustion zone. 5.11 BURNER, AUTOMATICALLY LIGHTED One where fuel to the main burner is normally turned on and ignited automatical
44、ly. 5.12 BURNER, MANUALLY LIGHTED One where fuel to the main burner is turned on only by hand and ignited under supervision. 5.13 BURNER HEAD, GAS That portion of a burner beyond the outlet end of the mixer tube which contains the ports. NOVEMBER 8, 2010 COMMERCIAL INCINERATORS - UL 2790 7UL COPYRIG
45、HTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 5.14 CASING An enclosure forming the outside of the incinerator, no parts of which are likely to be subjected to intense heat. 5.15 CHIMNEY, HIGH-HEAT A chimney capable of withstanding a continuous ue ga
46、s temperature exceeding 982C (1800F). 5.16 CHIMNEY, MEDIUM-HEAT A chimney capable of withstanding a continuous ue gas temperature not exceeding 982C (1800F). 5.17 CHIMNEY CONNECTOR The pipe which connects a fuel burning incinerator to a chimney. 5.18 CHIMNEY, FACTORY BUILT Those chimneys of the fact
47、ory-made type intended for use with gas red incinerators. 5.19 COMBUSTIBLE MATERIAL Combustible material, as pertaining to materials adjacent to or in contact with heat producing incinerators, chimney connectors and vent connectors, means material made of or surfaced with wood, compressed paper, pla
48、nt bers, or other material that will ignite and burn. Such material shall be considered as combustible even though ameproofed, re retardant treated, or plastered. 5.20 COMBUSTION As used herein, the rapid oxidation of fuel accompanied by the production of heat, or heat and light. Complete combustion
49、 of a fuel is possible only in the presence of an adequate supply of oxygen. 5.21 COMBUSTION CHAMBER The portion of an incinerator within which combustion occurs. 5.22 COMBUSTION DETECTOR That part of a primary safety control which is responsive directly to ame properties. 5.23 COMBUSTION PRODUCTS Constituents resulting from the combustion of a fuel with the oxygen of the air, including the inerts
