UL 2790
Standard for Commercial Incinerators

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2010-11-08DOD Approved: --
Price Code:BANSI Approved: 2014-06-12
Type:ulstd

  • SCOPE

    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 defined in 5.30). They are not intended to incinerate any hazardous, including biological/infectious, chemical and/or explosive, types of material and not intended for use in spaces in which flammable 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 fire, shock, mechanical hazards, and carbon monoxide emissions.

    1.3 Crematories covered by these requirements are the factory-made type and may be field 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 these 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 respect to:

    a)    Particulate emissions, oxides of nitrogen, and other products of combustion in the flue gas. These requirements do not include limitations on Nox emissions and only carbon monoxide was required to be within the specified limits.

    b)    The types of wastes to be incinerated.

    1.6 Additional installation and operation requirements are available as defined by the National Fuel Gas Code, NFPA 54, the Liquefied Petroleum Gas Code, NFPA 58, the National Electrical Code, NFPA 70 and other codes as applicable.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION – ELECTRICAL
          • 6 General
          • 7 Servicing and Adjustment
          • 8 Enclosures
            • 8.1 General
            • 8.2 Accessibility of uninsulated live parts and film-coated wire – general
            • 8.3 Doors and covers
            • 8.4 Field wiring system connection
          • 9 Field Wiring
            • 9.1 General
            • 9.2 Leads and terminals
          • 10 Internal Wiring
            • 10.1 General
            • 10.2 Methods
            • 10.3 Short-circuit protection
          • 11 Separation of Circuits
          • 12 Bonding for Grounding
          • 13 Mounting of Electrical Components
          • 14 Motors
            • 14.1 General
            • 14.2 Motor Overload Protection
          • 15 Overcurrent Protection of High-Voltage Control-Circuit Conductors
            • 15.1 General
            • 15.2 Direct-connected high-voltage control circuit
            • 15.3 Tapped high-voltage control circuits
            • 15.4 Overcurrent-protective devices
          • 16 Overcurrent Protection of Transformers
            • 16.1 High-voltage transformers – General
            • 16.2 High-voltage transformers – Thermal protection
            • 16.3 High-voltage transformers – Overcurrent protection
            • 16.4 Low-voltage transformers – General
            • 16.5 Low-voltage transformers - Overcurrent protective devices
          • 17 Switches and Controllers
          • 18 Capacitors
          • 19 Electrical Insulating Materials
          • 20 High-Voltage Circuits
          • 21 Low-Voltage Circuits
        • CONSTRUCTION – MECHANICAL
          • 22 General
          • 23 Corrosion Protection
          • 24 Fuel Confining Parts
        • CONSTRUCTION – INCINERATOR ASSEMBLY
          • 25 General
          • 26 Accessibility
          • 27 Baffles
          • 28 Temperature Controls
          • 29 Bases
          • 30 Incinerator Combustion Chambers
          • 31 Ash Compartment
          • 32 Radiation Shields
          • 33 Casings
          • 34 Flue Collars
          • 35 Chimneys
        • CONSTRUCTION – BURNER ASSEMBLIES
          • 36 General
          • 37 Controls
          • 38 Fan Housings and Air Tubes
          • 39 Combustion Air Controls
          • 40 Primary Safety Controls
            • 40.1 General
            • 40.2 Fuel pressure controls
          • 41 Ignition Systems – General
          • 42 Electric High-Tension Ignition
            • 42.1 Spark igniters
            • 42.2 Electrodes and bus bars
            • 42.3 Insulators
            • 42.4 Leads
            • 42.5 Transformers
            • 42.6 Gas pilots
          • 43 Fittings and Piping
          • 44 Valves and Regulators
            • 44.1 Automatic safety shutoff valves
            • 44.2 Manually operated valves
            • 44.3 Gas pressure regulators
          • 45 Bleeds and Vents
        • PERFORMANCE
          • 46 General
          • 47 Test Installations
          • 48 Instrumentation
            • 48.1 Draft measurement
            • 48.2 Power measurement
            • 48.3 Temperature measurements
          • 49 Test Methods
            • 49.1 Firing conditions
            • 49.2 Test voltages
          • 50 Power Input Test – Test No. 1
          • 51 Combustion – Test No. 2
          • 52 Burner Endurance – Test No. 3
          • 53 Combustion Air Failure – Test No. 4
          • 54 Undervoltage – Test No. 5
          • 55 Power Interruption – Test No. 6
          • 56 Pilot Supervision – Test No. 7
          • 57 Ignition, Gas-Electric High Tension – Test No. 8
          • 58 Delayed Ignition – Test No. 9
          • 59 Temperature Control – Test No. 10
          • 60 Temperature Tests
            • 60.1 General
            • 60.2 Continuous operation – Test No. 11
          • 61 Short-Circuit – Test No. 12
          • 62 Overload Test, High-Voltage Transformers – Test No. 13
          • 63 Burnout Test, High-Voltage Transformers – Test No. 14
          • 64 Dielectric Voltage-Withstand Test – Test No. 15
          • 65 Strain Relief – Test No. 16
          • 66 Hydrostatic Strength – Test No. 17
        • OUTDOOR-USE EQUIPMENT
          • CONSTRUCTION
          • 67 General
          • 68 Enclosures
          • 69 Field Wiring Connections
          • 70 Wiring
          • 71 Electrical Insulation Material
          • PERFORMANCE
          • 72 Rain Test – Test No. 18
          • 73 Wind Tests – Test No. 19
          • 74 Accelerated Aging Test – Gaskets, Adhesives, and Sealing Compounds – Test No. 20
          • 75 Metallic Coating Thickness Test – Chromic Acid Dropping Test – Test No. 21
        • MANUFACTURING AND PRODUCTION TESTS
          • 76 General
        • MARKINGS
          • 77 General
        • INSTRUCTIONS
          • 78 General