1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDecember 09, 20161UL 4040Outline of Investigation for Portable Wet-Type Dust Collectors forCollection of Combustible MetalsIssue Number: 1December 9, 2016Summary of TopicsThis First issue of the
2、Outline of Investigation for Portable Wet-Type DustCollectors for Collection of Combustible Metals, UL 4040, coverssupplementary requirements to other applicable requirements in theStandard for Safety for Vacuum Cleaners, Blower Cleaners, andHousehold Floor Finishing Machines, UL 1017.ULs Outlines o
3、f Investigation are copyrighted by UL LLC. Neither a printed norelectronic copy of an Outline of Investigation should be altered in any way. All ofULs Outlines of Investigation and all copyrights, ownerships, and rights regardingthose Outlines of Investigation shall remain the sole and exclusive pro
4、perty of ULLLC.COPYRIGHT 2016 UL LLCUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULDECEMBER 09, 2016UL 40402No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULCONTENTSI
5、NTRODUCTION1 Scope .42 Units of Measurement .43 Undated References 44 Definitions 5CONSTRUCTION5 General 56 Components 67 Mechanical Assembly .68 Corrosion Protection .69 Grounding and Electrostatic Bonding 610 Liquid Reservoir .711 Hydrogen Production .7TESTS12 Temperature Test 713 Resistivity Test
6、 for Electrostatically Dissipative Materials 814 Electrostatic Discharge Test .815 Ground Continuity Test .916 Exhaust Air Test .9MARKINGS17 General .9INSTRUCTIONS18 Important Safety Instructions .10DECEMBER 09, 2016 UL 4040 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBU
7、TION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requirements are supplementary to other applicable requirements in the Standard for Safetyfor Vacuum Cleaners, Blower Cleaners, and Household Floor Finishing Machines, UL 1017.1.2 These requirements apply to commercial or industrial portabl
8、e WET-TYPE DUST COLLECTORS andcommercial or industrial portable WET-TYPE VACUUM CLEANERS for the collection of combustiblemetal dust in the production, processing, finishing, handling, recycling, storage and use, includingoperations, such as grinding, sanding, cutting, machining and additive manufac
9、turing, of metals and alloysin a form capable of combustion or explosion as defined by NFPA 484.1.3 These requirements apply to products for use in ordinary (unclassified) locations. Equipment intendedfor use in hazardous locations, as defined in the National Electrical Code, ANSI/NFPA 70, are cover
10、ed byUL 1203.1.4 Products with current-carrying hoses and motorized nozzles for collection of combustible metal dustare not covered by these requirements.1.5 These requirements apply only to a specific type of appliance, such as a vacuum cleaner or dustcollector, if the requirement is so identified
11、by specific reference to the type involved. Absence of suchspecific reference or use of the term appliance indicates that the requirement applies to all appliancescovered by this standard.2 Units of Measurement2.1 Values stated without parentheses are the requirement. Values in parentheses are expla
12、natory orapproximate information.3 Undated References3.1 Any undated reference to a code or standard appearing in the requirements of this outline ofinvestigations shall be interpreted as referring to the latest edition of and latest revisions to that code orstandard.UL StandardsUL 1017Standard for
13、Vacuum Cleaners, Blower Cleaners, and Household Floor Finishing MachinesUL 1203Standard for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous(Classified) LocationsUL 913Standard for Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III,
14、 Division1, Hazardous (Classified) LocationsNFPANFPA 70National Electrical CodeDECEMBER 09, 2016UL 40404UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULNFPA 484 (2015)Standard for Combustible MetalsIEC StandardsIEC 60335-2-69Household and simi
15、lar electrical appliances Safety Part 2-69: Particular requirements for wet and dryvacuum cleaners, including power brush, for commercial use4 Definitions4.1 For the purpose of this outline of investigation the following definitions apply.4.2 DEGREE OF PENETRATION A measure of the filtration efficie
16、ncy of the machine consisting of thepercentage of the average mass concentration of the test aerosol in the exhaust air to the average massconcentration of the test aerosol introduced into the intake air.4.3 ELECTROSTATICALLY DISSIPATIVE MATERIAL A material possessing the ability to allow theflow of
17、 an electric charge having a surface resistivity of less than 1 G (per square) or complying with theElectrostatic Discharge Test, Section 14.4.4 WET-TYPE DUST COLLECTOR A machine designed for connection to a dust-generating machinethat utilizes a liquid reservoir to remove the dust from the intake a
18、ir by being directed through or towardsthe liquid in the reservoir. See Annex A of NFPA 484 for examples of typical wet-type collectorconstructions.4.5 WET-TYPE VACUUM CLEANER A machine for collecting dust from floors and other surfaces thatis designed to remove dust from the intake air by being dir
19、ected through or towards the liquid in thereservoir. This is not the same as a “wet pick-up vacuum cleaner” as referenced in UL 1017.CONSTRUCTION5 General5.1 The appliance shall comply with the requirements for commercial vacuum cleaners in UL 1017 inaddition to these requirements.DECEMBER 09, 2016
20、UL 4040 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6 Components6.1 Electrical components shall not be located in the dust-laden air path (dirty air), unless they complywith requirements for Class II, Division 1 locations for Group E dust
21、 in UL 1203 or the requirements forintrinsically safe components in UL 913.6.2 Hoses shall be no longer than 7.6 m (25 feet) in length and the hose materials shall comply with 9.2.7 Mechanical Assembly7.1 Dust-laden air (dirty air) shall not pass through the fan or blower or other parts moving at hi
22、gh speed.8 Corrosion Protection8.1 The appliance shall be constructed of materials, such as stainless steel, that are compatible with thecombustible metal dust intended to be collected. In particular, metal parts in the dust-laden air path shallbe protected against corrosion (oxidation), to prevent
23、thermite reactions due to galvanic incompatibilitybetween combustible metal dust and metal oxides. See 17.2.9 Grounding and Electrostatic Bonding9.1 The appliance shall have provision for grounding.9.2 Enclosures, accessible metal parts and parts in contact with the combustible metal dust, including
24、hinges, brackets, hoses and attachments, shall be constructed of metal or, if of nonmetallic material shall:a) Have a surface area of less than 100 cm2(15.5 inch2), orb) Be constructed of ELECTROSTATICALLY DISSIPATIVE MATERIAL as determined by thematerial specification, measured in accordance with t
25、he Resistivity of Electrostatic DissipativeMaterials Test, Section 13 or the Electrostatic Discharge Test, Section 14.9.3 All metal parts as specified in 9.2 shall be reliably bonded to the means for grounding to reduce therisk of electrostatic discharge as determined by the Ground Continuity Test,
26、Section 15, unless the part:a) Is not required to be grounded per 4.16.3 of UL 1017, andb) Complies with the Electrostatic Discharge Test, Section 14.9.4 All parts of ELECTROSTATICALLY DISSIPATIVE MATERIAL as specified in 9.2 shall be connectedto grounded metal parts to reduce the risk of electrosta
27、tic discharge.DECEMBER 09, 2016UL 40406UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL10 Liquid Reservoir10.1 The liquid reservoir shall have a visible indication of the amount of liquid in the reservoir and theminimum fill level for operatio
28、n. The maximum operating level shall also be identified to notify the userwhen to empty the sludge.10.2 Operation of the appliance shall be prevented when the water level is below the minimum fill level.An electromechanical water level control shall be suitable for 100,000 cycles. An electronic wate
29、r levelcontrol shall be considered a safety critical function with a minimum Performance Level (PL) of C inaccordance with Clause 4.11.4.3 of UL 1017.10.3 A window for viewing into the liquid reservoir or other accessible non-metallic part forming part ofthe liquid reservoir shall withstand the Ball
30、 Impact Test of UL 1017, but with a force of 2.8 J (2 ft-lb),without breaking or cracking.11 Hydrogen Production11.1 The water reservoir shall be provided with a vent at the top of the dust collection chamber to preventaccumulation of hydrogen gas generated from combustible metal dust contacting the
31、 water. The vent shallbe at least 25.4 mm (1 inch) in diameter and it shall open automatically when the appliance is notoperating.11.2 All compartments above the water reservoir shall be provided with venting at the top of thecompartment to prevent the accumulation of hydrogen gas when the unit is n
32、ot in operation. The total ventarea shall be at least 506 mm2(0.78 inch2).11.3 Any electrical compartment above the water reservoir shall be provided with means to preventhydrogen gas from entering the compartment.TESTS12 Temperature Test12.1 During the Temperature Test in Clause 5.8 of UL 1017, the
33、 appliance is to be filled with water to theminimum fill line and the temperature of surfaces that are located in the dust-laden air path shall notexceed 135 C (275 F).DECEMBER 09, 2016 UL 4040 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL
34、13 Resistivity Test for Electrostatically Dissipative Materials13.1 To determine if a non-metallic part is electrostatically dissipative, the surface resistivity of thematerial measured as specified in 13.2 and 13.3 shall be less than 1 G at 23C (73F) and 50 percentrelative humidity.13.2 A non-metal
35、lic surface shall have a surface resistivity specified in 13.1 as defined by the materialspecifications or as determined by the test in 13.3.13.3 The resistance is to be tested on the enclosure or on parts of the enclosure. Two parallel electrodes1 mm (0.04 inch) in width, 100 mm (4 inches) in lengt
36、h, 10 mm (0.4 inch) apart are to be centered on a150 mm by 60 mm (6 by 2.4 inch) sample. The sample is to be cleaned with distilled water, then withisopropyl alcohol, then once more with distilled water before being dried. Untouched by bare hands, it isto be conditioned for 24 hours at 23C (73F) and
37、 50 percent relative humidity. The test is to be carriedout under the same conditions. A voltage of 500 10 Vdc is to be applied for one minute. The resistanceis the quotient of the voltage applied at the electrodes to the total current flowing between them when thevoltage has been applied for one mi
38、nute.14 Electrostatic Discharge Test14.1 No sparks shall be observed when a nonmetallic external part with an area greater than 100 cm2(15.5 inch2) or a metal part that is not connected to the means for grounding is subjected to the testspecified in 14.2 14.4.14.2 Three samples of the part are to be
39、 conditioned for at least 48 hours at a relative humidity of 25 10percent.14.3 Immediately after removal from the low-humidity chamber, the samples are to be supported bymeans of insulators in a room having a relative humidity not more than 35 percent and having all sourcesof light, other than elect
40、rical sparks, eliminated. An electrostatic charge is to be sprayed onnon-conductive parts of the product using a Van de Graaf generator limited to 5000 volts.14.4 A 9.5 mm (3/8 inch) diameter grounded metal sphere is to be brought into gradual contact with thenon-conductive area of the sample.DECEMB
41、ER 09, 2016UL 40408UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL15 Ground Continuity Test15.1 The resistance of the grounding path between the terminal for connection of the groundingconductor of the power-supply cord and dead metal parts r
42、equired to be bonded in accordance with 9.3shall not exceed 0.1 ohm.15.2 The resistance is to be determined by any convenient method except when results that do notcomply with the requirement are recorded. Then either a direct- or alternating-current of 15 amperes is tobe passed from the grounding t
43、erminal to each dead metal part required to be bonded in accordance with15.1, and the resulting drop in potential is to be measured between these two points. The resistance inohms is to be determined by dividing the drop in potential in volts by the current in amperes passingbetween the two points.1
44、6 Exhaust Air Test16.1 The appliance shall be evaluated for the filtration efficiency with respect to the concentration of dustin the exhaust air being returned the work area as determined by 16.2.16.2 The appliance shall be constructed to provide a DEGREE OF PENETRATION of less than 1percent. Compl
45、iance is checked by conducting the Assembled Machine Test specified in Annex AA of IEC60335-2-69. The appliance is to be filled to the minimum fill line or the minimum fill level that allowsoperation, and operated for one hour and the DEGREE OF PENETRATION is to be averaged over theduration of the t
46、est with the first readings being taken at 5 minutes of operationMARKINGS17 General17.1 The appliance shall be provided with a plainly marked minimum fill line and the hydrogen vent shallbe identified on the water reservoir. The maximum operating level shall also be identified to notify the userwhen
47、 to empty the sludge.17.2 The following statement or the equivalent shall be marked on the appliance nameplate: “For Use inOrdinary (Nonhazardous) Locations.”17.3 The appliance shall be marked with the following or the equivalentDANGER Collection of Combustible Metals Presents a Risk of Fire and Exp
48、losion. Qualified Users Only.1) (+) Metal Only Fire or Explosion Can Result with Other Metals, including metal parts, suchas bolts, screws or nutsWhere (+) is to be filled with the type of metal for which the appliance has been evaluated, suchas aluminum or titanium.2) To Reduce the Risk of Electros
49、tatic Discharge:a) Use Only the Hoses and Attachments Recommended by the Appliance Manufacturerb) Proper Grounding of the Appliance is Essential to Reduce the Risk of ElectrostaticDischarge. Verify Ground Continuity of the Appliance Regularly3) Hydrogen Gas is Flammable and is Generated by Metal Dust in Contact with WaterDECEMBER 09, 2016 UL 4040 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULa) Hydrogen Vent Prevents Accumulation of Hydrogen Gas within the Water ReservoirWhen Not in Operatio
