1、AN AMERICAN NATIONAL STANDARD ASME HST-12012Revision of ASME HST-11999 (R2004)Performance Standard for Electric Chain HoistsASME HST-12012Revision of ASME HST-11999 (R2004)PerformanceStandard forElectric ChainHoistsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016 USADate of Issuance
2、: November 28, 2012This Standard will be revised when the Society approves the issuance of a new edition.Periodically, certain actions of the ASME HST Committee may be published as Cases. Cases andinterpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org/
3、as they are issued.Errata to codes and standards may be posted on the ASME Web site under the Committee Pages toprovide corrections to incorrectly published items, or to correct typographical or grammatical errorsin codes and standards. Such errata shall be used on the date posted.The Committee Page
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5、SME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure that individuals f
6、romcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “appr
7、ove,” “rate,” or “endorse” any item, construction, proprietary device, or activity.ASME does not take any position with respect to the validity of any patent rights asserted in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a standard against l
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10、ies, which precludes the issuance of interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY
11、10016-5990Copyright 2012 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the HST Committee viSummary of Changes viiChapter 1-0 Scope, Definitions, References, and Appendices 1Section 1-0.1 Scope . 1Section 1
12、-0.2 Definitions 1Section 1-0.3 References 4Section 1-0.4 Appendices . 4Chapter 1-1 Performance . 5Section 1-1.1 General . 5Section 1-1.2 Hoist Duty Service Classification 5Section 1-1.3 Duty Classification 5Section 1-1.4 Application Analysis 7Section 1-1.5 Specification of Lift, Headroom, and Reach
13、 7Section 1-1.6 Speeds, Hoist, and Trolley . 7Section 1-1.7 Trolleys . 7Section 1-1.8 Overload Limiting Device . 8Section 1-1.9 Pull Cord Control . 8Section 1-1.10 Typical Hoist and Trolley Inquiry Data 8Figures1-0.2-1 Headroom, Lift, and Reach 21-0.2-2 Reeving 3Tables1-1.3-1 Duty Classifications .
14、61-1.6-1 Typical Hoist and Motorized Trolley Speeds . 8Form1-1.10-1 Typical Hoist and Trolley Inquiry Data Form 9Nonmandatory AppendicesA Performance Requirements for Electric Chain Hoists Used in Marineand Other Applications as Required by the U.S. Department ofDefense (DOD) . 11B Typical Examples
15、of Hoist Class Selection 19iiiFOREWORDThis Standard is one in a series that provides performance requirements for hoists that wasoriginally issued in 1982. It was developed by the ASME HST Standards Committee,Hoists Overhead. It is intended to serve as a guide to manufacturers, purchasers, and users
16、of the equipment.The other Standards in this series areHST-2 Hand Chain Manually Operated Chain HoistsHST-3 Manually Lever Operated Chain HoistsHST-4 Electric Wire Rope HoistsHST-5 Air Chain HoistsHST-6 Air Wire Rope HoistsThis revision includes an appendix that, in conjunction with ASME HST-12012,
17、is intendedto replace MIL-H-15317, previously used to procure electric chain hoists by the Department ofDefense (DOD).Suggestions for improvement of this Standard are welcome. They should be addressed to theSecretary, ASME HST Standards Committee, Three Park Avenue, New York, NY 10016-5990.ASME HST-
18、12012 was approved by ANSI as an American National Standard onOctober 4, 2012.ivASME HST COMMITTEEHoists Overhead(The following is the roster of the Committee at the time of approval of this Standard.)STANDARDS COMMITTEE OFFICERSW. E. Osborn, ChairE. K. Marburg, Vice ChairM. R. Gerson, SecretarySTAN
19、DARDS COMMITTEE PERSONNELB. M. Casey, General Dynamics Electric BoatJ. Davis, ConsultantM. R. Gerson, The American Society of Mechanical EngineersF. G. Heath, Heath however, they shouldnot contain proprietary names or information.Requests that are not in this format may be rewritten in the appropria
20、te format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved by anin
21、terpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The HST Standards Committee regularly holds meetings,which are open to the public. Pe
22、rsons wishing to attend any meeting should contact the Secretaryof the HST Standards Committee.viASME HST-12012SUMMARY OF CHANGESFollowing approval of the ASME HST Standards Committee and ASME, and after public review,ASMEHST-12012was approvedbytheAmerican NationalStandardsInstituteonOctober 4,2012.
23、ASME HST-12012 is rewritten and reorganized to conform to current ASME format for standards,and harmonized with ASME B30.16 to eliminate duplication and conflicts in content. The require-ments of this Standard shall be applied together with the requirements of ASME B30.16 for theproducts covered.vii
24、INTENTIONALLY LEFT BLANKviiiASME HST-12012PERFORMANCE STANDARD FOR ELECTRIC CHAIN HOISTSChapter 1-0Scope, Definitions, References, and AppendicesSECTION 1-0.1: SCOPE(a) This Standard establishes performance require-ments for electric chain hoists for vertical lifting serviceinvolving material handli
25、ng of freely suspended(unguided) loads usingload chain of theroller or weldedlink types with one of the following types of suspension:(1) lug(2) hook or clevis(3) trolley(b) This Standard is applicableto hoists manufacturedafter the date on which this Standard is issued. It is notapplicable to(1) da
26、maged or malfunctioning hoists(2) hoists that have been misused or abused(3) hoists that have been altered without authoriza-tion of the manufacturer or a qualified person(4) hoists used for lifting or supporting people(5) hoists used for the purpose of drawing both theload and the hoist up or down
27、the hoists own loadchain(s)(6) hoists used for marine and other applicationsas required by the Department of Defense (DOD)The requirements of this Standard shall be appliedtogether with the requirements of ASME B30.16. Pleasealso refer to ASME B30.16 for requirements pertainingto marking, constructi
28、on, and installation; inspection,testing, and maintenance; and operation.SECTION 1-0.2: DEFINITIONSabnormal operating conditions: environmental conditionsthat are unfavorable, harmful, or detrimental to the oper-ation of a hoist, such as excessively high or low tempera-ture, exposure to weather, cor
29、rosive fumes, dust laden ormoisture laden atmospheres, and hazardous locations.ambient temperature: the temperature of the atmospheresurrounding the hoist.beam: an overhead standard structural or specially fabri-cated shape, on which the trolley operates.brake: a device, other than a motor, used for
30、 retardingor stopping the hoist or trolley motion by friction orpower means.1brake, holding: a friction brake for a hoist that is automati-cally applied and prevents motion when power is off.brake, mechanical load: an automatic type of brake usedfor controlling loads in a lowering direction. This un
31、idi-rectional device requires torque from the motor to lowera load but does not impose additional load on the motorwhen lifting a load.chain, load: the load-bearing chain in the hoist.chain, roller: a series of alternately assembled roller linksand pin links in which pins articulate inside the bush-
32、ings, and the rollers are free to turn on the bushings.Pins and bushings are press-fit in their respective linkplates.chain, welded link: a chain consisting of a series of inter-woven links formed and welded.NOTE: Load chain properties do not conform to those shown inASME B30.9 or ASME B29.1.contact
33、or: an electromechanical device for opening andclosing an electric power circuit.control actuator: a manual means at the operating stationby which hoist controls are energized.control enclosure: the housing containing the electricalcontrol components.controlled braking means: a method of controlling
34、 speed byremoving energy from the moving body, or by impartingenergy in the opposite direction.braking, dynamic: a method of controlling speed byusing the motor as a generator, with the energy beingdissipated by resistance.braking, mechanical: a method of controlling or reduc-ing speed by friction.b
35、raking, regenerative: a method of controlling speed inwhich the electrical energy generated by the motor isfed back into the power system.cushioned start: an electrical or mechanical method forreducing the rate of acceleration of trolley motion.hazardous (classified) locations: locations where fire
36、orexplosion hazards may exist. Locations are classifieddepending on the properties of the flammable vapors,ASME HST-12012Fig. 1-0.2-1 Headroom, Lift, and Reachliquids or gases, or combustible dusts or fibers thatmaybe present, and the likelihood that a flammable orcombustible concentration or quanti
37、ty is present. Referto ANSI/NFPA 70.class 1: locations in which flammable gases or vaporsare or may be present in the air in quantities sufficientto produce explosive or ignitable mixtures.class 2: locations that are hazardous because of thepresence of combustible dust.class 3: locations that are ha
38、zardous because of thepresence of easily ignitable fibers or flyings, but in whichsuch fibers or flyings are not likely to be in suspensionin the air in quantities sufficient to produce ignitablemixtures.headroom: headroom is measured with the load hook atits upper limit of travel and is the distanc
39、e from thesaddle of the load hook to the following locations (seeFig. 1-0.2-1):(a) saddle of the top hook on hook suspended hoists(b) centerline of the suspension holes on lug sus-pended hoists(c) wheel treadline on trolley suspended hoistshoist: a suspended machinery unit that is used for liftingor
40、 lowering a freely suspended (unguided) load.hoist speed: the rate of motion that the load hook obtainswhile lifting rated load.2hook suspended: suspension of hoist from a trolley or rigidstructure by means of a hook at top of hoist.idler sprocket: a freely rotating device that changes thedirection
41、of the load chain. This device is sometimescalled idler wheel, idler sheave, pocket wheel, or chainwheel (see Fig. 1-0.2-2).lift: the maximum vertical distance through which theload hook can travel, and is the total hook movementbetween its upper limit of travel and its lower limit oftravel (see Fig
42、. 1-0.2-1).lifting devices, below-the-hook: devices that are not nor-mally reeved onto the hoist chains such as hook-on buck-ets, magnets, grabs, and other supplemental devicesused for handling certain types of loads. The weight ofthese devices is to be considered part of the load to belifted.limit
43、device: an electrical, mechanical, or electromechani-cal device for limiting the upward or downward travelof the load hook at the extremities of lift. This devicemay limit lift at any point within the extremities of lift,if designed to be adjustable.load: the total superimposed weight on the load bl
44、ockor hook.load block: the assembly of hook or shackle, swivel, bear-ing, pins, sprocket, and frame suspended by the loadASME HST-12012Fig. 1-0.2-2 ReevingSlack chain Slack chain Slack chainLoad sprocketLoad blockIdler sprocketLoad block1 Part 2 Part 3 Partchain. This shall include all appurtenances
45、 reeved in theload chain.load chain container: a device used to collect the slackload chain.load hook: the hook used to connect the load to the hoist.load sprocket: a hoist component that transmits motionto the load chain. This component is sometimes calledload wheel, load sheave, pocket wheel, chai
46、n wheel, orlift wheel (see Fig. 1-0.2-2).load suspension parts: the means of suspension (trolley,hook, or lug), the chain, the sprocket(s), the structure orhousing that support the sprocket(s), and the load block.lug suspended: suspension of the hoist from a trolleyor permanent structure by means of
47、 a bolt(s) or pin(s)through a rigid- or swivel-type lug.magnetic control: a means of controlling the directionand speed of the hoist and trolley by using magneticcontactors and relays.minimum radius: the smallest radius of the beam, mea-sured to the centerline of the web of the beam, on whichthe tro
48、lley will operate.normal operating conditions: conditions during which ahoist is performing functions within the scope of theoriginal design.overload: any load greater than the rated load.3parts (lines): number of lines of chain supporting theload block or hook.pendant station: electrical controls s
49、uspended from thehoist for operating the unit.power transmission parts: machinery components, includ-ing the gears, shafts, clutches, coupling, bearings,motors, and brakes.qualified person: a person who, by possession of a recog-nized degree in an applicable field, certificate of profes-sional standing, or who, by extensive knowledge,training, and experience, has successfully demonstratedthe ability to solve or resolve problems relating to thesubject matter and work.rated load: the maximum load for which a hoist or trolleyis designated by the manufacturer or qualif
