1、ASME B29.24-2002(Revision of ASME B29.24M-1995)ROLLER LOADCHAINS FOROVERHEAD HOISTSAN AMERICAN NATIONAL STANDARDIntentionally left blank AN AMERICAN NATIONAL STANDARDROLLER LOAD CHAINS FOROVERHEAD HOISTSASME B29.24-2002(Revision of ASME B29.24M-1995)Date of Issuance: September 26, 2002This Standard
2、will be revised when the Society approves the issuance ofa new edition. There will be no addenda or written interpretations of therequirements of this Standard issued to this Edition.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed
3、under procedures accredited as meeting the criteria forAmerican National Standards. The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate. The proposed code or standard was made a
4、vailable for public reviewand comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approve,” “rate,” or “endorse” any item, construction, proprietary device,or activity.ASME does not take any position wit
5、h respect to the validity of any patent rights asserted inconnection with any items mentioned in this document, and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable letters patent, nor assumesany such liability. Users of a code or standard
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7、y endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued inaccordance with the established ASME procedures and policies, which precludes the issuanceof interpretations by individuals.No part of this document may be reproduced in any fo
8、rm,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 10016-5990Copyright 2002 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.CONTENTSForew
9、ord ivCommittee Roster vCorrespondence With the B29 Committee . vi1 Scope 12 Purpose 13 Roller Load Chains . 13.1 1Nomenclature 3.2 1General Proportions 3.3 1Numbering System 3.4 1Minimum Ultimate Tensile Strength 3.5 1Length Tolerance 3.6 4Measuring Load .3.7 4Preload .3.8 4General Chain Dimensions
10、 .4 Roller Chain Inspection, Replacement, and Maintenance . 44.1 4Chain Inspection .4.2 7Maintenance .4.3 8Replacement of Load Chain Figures1 Typical Hoist Roller Load Chain . 22 Overhead Hoist 43 Elongation Measurement 54 Illustration of Camber and Twist . 55 Hook 66 Pin Turning . 67 Inspection of
11、Chain Rollers 78 Inspection for Tight Joints . 7Table1 General Load Chain Dimensions 3iiiFOREWORDA number of specialized roller chains are made and supplied to original equipmentmanufacturers for use as load chains on overhead hoists. Although these chains are ofsimilar design and construction, and
12、are usually dimensionally interchangeable with equivalentpitch ANSI B29.1, Power Transmission Roller Chains, they differ in that they are normallymade using select steels and/or specially treated chain parts to provide for the higher tensileand fatigue strength properties required to meet the rate l
13、oad capacitites of the overheadhoists in which they are used.Hoist load chains are consequently assigned special chain numbers to distinguish themfrom equivalent pitch B29.1 or other roller chains, which even if dimensionaly interchangeable,may not have the necessary strength or special characterist
14、ics for replacement of the originalhoist load chain.It was recognized by the Roller Chain Technical Committee of the American ChainAssociation that a potential risk of personal injury could occur as a result of chain failureif the original load chiain was inadvertently replaced by a lower strenght c
15、hain, or if properuse, care, and maintenace procedures were not followed. Consequently, a committee wasformed in October 1978 to prepare a standared for chains used in overhead hoists to serveas a guide to users and purchasers of overhead hoists with regard to hoist chain designations,dimensions, ul
16、timate strength, maintenance, and inspection procedures, and restrictions forchain replacement. The standard would also provide a reference in related standards suchas ASME/ANSI B30.16, Overhead Hoists (Underhung), (latest edition) with regard to chaincare and replacement.In tabulating dimensional i
17、nformation in this Standard, customary inch-pound units havebeen used. Additionally, companion tabulations have been included in order to providetranslations of these values into metric (SI) units in accordance with ASME Guide SI-1,ASME Orientation and Guide for use of SI (Metric) Units. For this re
18、ason, certain formulasand relationships have been intentionally presented only in customary units so as to precludeany ambiguity between them and the tablulated values.ASME B29.24M-1995 included two significant modifications. The first is a reviseddefinition of Minimum Ultimate Tensile Strength that
19、 clarifies the meaning and use of theterm. The second is a revision to the listed values for maximum pin diameter. The changesin pin diameter will not affect the interchangeability of the chains. The pin diameters werechanged to provide a national basis for conversion between conventional (inch) and
20、 SI(metric) dimensions. With concurrent changes in the related ISO standards, a long-standingsource of potential discrepancies will be eliminated.The lastest revision of this Standard includes two changes. One is the inclusion of therequirements to preload all chains covered by this Standard. The mi
21、nimum preload valuesare derived from the requirements specified in the hoist standards such as ASME B30.21,Manually Lever Operated Hoists. The second change is the removal of 1 in. pitch80 HSseries chain.Suggestions for the improvement of this Standard are welcome. They should be addressedto the Sec
22、retary, ASME B29 Committee, Three Park Avenue, New York, NY 10016-5990.This Standard was approved as an American National Standard on August 20, 2002.ivASME STANDARDS COMMITTEE B29Chains, Attachments, and Sprockets for PowerTransmission and Conveying(The following is the roster of the Committee at t
23、he time of approval of this Standard.)OFFICERSJ. L. Wright, ChairC. G. Springman, Vice ChairM. Lo, SecretaryCOMMITTEE PERSONNELW. C. Hall, Ramsey Production Corp.L. E. Hampel, Allied-Locker Industries, Inc.M. Lo, The American Society of Mechanical EngineersA. M. McCarty, MGRD. Moore, Jeffrey Chain C
24、o.R. W. Neuhengen, Drives, Inc.V. D. Petershack, Hitachi Maxco Ltd.R. A. Reinfried, Conveyor Equipment Manufacturers AssociationS. Rhoad, Webster Industry, Inc.R. J. Rothchild, US TsubakiK. J. Smith, KONE, Inc.C. G. Springman, Diamond Chain Co.J. L. Wright, Diamond Chain Co.vCORRESPONDENCE WITH THE
25、B29 COMMITTEEGeneral. ASME Standards are developed and maintained with the intent to represent theconsensus of concerned interests. As such, users of this Standard may interact with theCommittee by requesting interpretations, proposing revisions, and attending Committeemeetings. Correspondence shoul
26、d be addressed to:Secretary, B29 Main CommitteeThe American Society of Mechanical EngineersThree Park AvenueNew York, NY 10016-5990Proposing Revisions. Revisions are made periodically to the Standard to incorporatechanges that appear necessary or desirable, as demonstrated by the experience gained f
27、romthe application of the Standard. Approved revisions will be published periodically.The Committee welcomes proposals for revisions to this Standard. Such proposals shouldbe as specific as possible, citing the paragraph number(s), the proposed wording, and adetailed description of the reasons for t
28、he proposal, including any pertinent documentation.Interpretations. Upon request, the B29 Committee will render an interpretation of anyrequirement of the Standard. Interpretations can only be rendered in response to a writtenrequest sent to the Secretary of the B29 Main Committee.The request for in
29、terpretation should be clear and unambiguous. It is further recommendedthat the inquirer submit his/her request in the following format:Subject: Cite the applicable paragraph number(s) and the topic of the inquiry.Edition: Cite the applicable edition of the Standard for which the interpretationis be
30、ing requested.Question: Phrase the question as a request for an interpretation of a specificrequirement suitable for general understanding and use, not as a requestfor an approval of a proprietary design or situation. The inquirer mayalso include any plans or drawings, which are necessary to explain
31、the question; however, they should not contain proprietary names orinformation.Requests that are not in this format will be rewritten in this format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration
32、of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved byan interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASMEdoes not “approve,”“certify,”“rate,” or “endorse” any item, construction, proprietar
33、y device,or activity.Attending Committee Meetings. The B29 Main Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretaryof the B29 Main Committee.viASME B29.24-2002ROLLER LOAD CHAINS FOR OVERHEAD HOISTS1 SCOPEThis Standard co
34、vers specialized roller chains thatare designed specifically as load chains for use inoverhead hoists.2 PURPOSEThe purpose of this Standard is to serve as a guideto purchasers and users of overhead hoists, and alsoas a reference in related standards such as ASME/ANSI B30.16, Overhead Hoists (Underhu
35、ng), (latestedition) with respect to roller load chains being madespecifically for use in various types of overhead hoists,including general chain dimensions, chain strengths,inspection and maintenance procedures, and guidelinesfor the proper selection of replacement chain.3 ROLLER LOAD CHAINS3.1 No
36、menclatureThese chains consist of a series of alternately assem-bled roller links and pin links in which the pins articulateinside the bushing and the rollers are free to turn onthe bushing. The pins and bushing are press fit in theirrespective link plates. See Fig. 1.3.2 General Proportions(a) Roll
37、er diameter is approximately58of the pitch.(b) Chain width is defined as the distance betweenroller link plates. It is approximately58of the chainpitch.(c) Pin diameter is approximately516of the pitchor12the roller diameter.(d) Maximum height of the roller link plates 0.95of the pitch.(e) Maximum he
38、ight of pin link plates 0.82 ofthe pitch.(f) Link plate thickness is approximately18of thechain pitch.13.3 Numbering SystemThe chain numbering system adopted for this Standardis based on chain pitch, and also on chain proportionsand link plate thickness as compared to the majorityof chains shown for
39、 a given pitch. A listing of loadchain numbers and related chain dimensions is givenin Table 1. The numbering system consists of a twodigit number, followed by either a single or double lettersuffix. These numbers and letter denote the following:(a) Left-Hand Digit denotes number of18in. inthe chain
40、 pitch(b) Right-Hand Digit(1) 0 (zero) denotes chain of usual proportions(2) 1 (one) denotes chain of special proportions(c) Letter Suffix(1) S denotes normal link plate thickness(2) HS denotes heavier than normal link platethickness3.4 Minimum Ultimate Tensile StrengthMinimum Ultimate Tensile Stren
41、gth (M.U.T.S.) forchain covered by this Standard is the minimum forceat which an unused, undamaged chain could fail whensubjected to a single tensile loading test.WARNING: The Minimum Ultimate Tensile Strength is NOT a“working load”! The M.U.T.S. greatly exceeds the maximumforce that may be applied
42、to the chain.(a) Test Procedure. A tensile force is slowly applied,at a rate not to exceed 2.0 in. per min, in a uniaxialdirection, to the ends of the chain sample.(b) The tensile test is a destructive test. Even thoughthe chain may not visibly fail when subjected to theMinimum Ultimate Tensile Forc
43、e, it will have beendamaged and will be unfit for service.3.5 Length ToleranceNew chains under standard measuring load shouldnot be underlength. The overlength tolerance is shownin Table 1 and it is based on:ROLLER LOAD CHAINS FOR OVERHEAD HOISTSASME B29.24-2002BEEFFGJHKLACRoller Link an inside link
44、 consisting of two roller link plates A, two bushings B, and two rollers CTypical Hoist Roller Load ChainPin Link an outside link consisting of two press fitpin plates E assembled with two pins FRiveted Type Connecting Link an outside link consisting of one press fit pin link plateE assembled with t
45、wo riveted pins F, and one separate press fit pin link plate GSpring Clip Type Connecting Link an outside linkconsisting of one press fit link plate E assembledwith two spring clip type chain pins K, one separatepress fit pin link plate G, and one spring clip LCotter Type Connecting Link an outside
46、link consistingof one press fit pin link plate E assembled with two cottertype chain pins H, one separate press fit pin link plate G,and two wire cotters JEGEGFIG. 1 TYPICAL HOIST ROLLER LOAD CHAIN2ROLLER LOAD CHAINS FOR OVERHEAD HOISTS ASME B29.24-2002PFDHBZXWGTABLE1GENERALLOADCHAINDIMENSIONSDimens
47、ions,in.(mm)Min.Min.Max.Min.WidthWidthMax.Max.WidthMax.UltimateMax.BetweenBetweenInnerOuterMax.OverWidthTensileMeasuringLengthANSINominalRollerInnerOuterPlatePlatePinInnerOverStrength,Load,Tolerance,ChainPitch,Diameter,Plates,Plates,Height,Height,Diameter,Link,Pins,lblbin./ftNo.PHWZGFDXB(kN)(N)(mm/m
48、)50S0.6250.4000.3700.5470.5940.5130.20040.5450.8257,000500.035(15.87)(10.16)(9.40)(13.89)(15.09)(13.03)(5.09)(13.84)(20.96)(31.14)(222)(2.91)50HS0.6250.4000.3700.5770.5940.5130.20040.5730.8817,800500.035(15.87)(10.16)(9.40)(14.66)(15.09)(13.03)(5.09)(14.55)(22.38)(34.69)(222)(2.91)60S0.7500.4690.495
49、0.7010.7130.6150.23460.6991.0079,000700.034(19.05)(11.91)(12.57)(17.81)(18.11)(15.62)(5.96)(17.75)(25.58)(40.03)(311)(2.83)60HS0.7500.4690.4950.7670.7130.6150.23460.7651.13010,000700.034(19.05)(11.91)(12.57)(19.48)(18.11)(15.62)(5.96)(19.43)(28.70)(44.48)(311)(2.83)81S1.0000.5620.4950.7670.8200.8200.28150.7651.18012,5001250.032(25.4)(14.27)(12.57)(19.48)(20.83)(20.83)(7.15)(19.43)(29.97)(55.60)(556)(2.66)3ROLLER LOAD CHAINS FOR OVERHEAD HOISTSASME B29.24-20020.002H20851pitch (in.)H208522+ 0.030 in. / ft3.6 Measuring LoadChains are to be measued for length while support
