1、AN AMERICAN NATIO NAL STANDAR DManually Lever Operated HoistsASME B30.21-2005(Revision of ASME B30.21-1999)Safety Standard for Cableways,Cranes,Derricks,Hoists,Hooks,Jacks,and SlingsCopyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford Uni
2、versity User.No further reproduction or distribution is permitted.Uncontrolled when printed.ASME B30.21-2005(Revision of ASME B30.21-1999)Manually LeverOperated HoistsSafety Standard for Cableways,Cranes,Derricks,Hoists,Hooks,Jacks,and SlingsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York,NY
3、 10016Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Date of Issuance:July 29,2005The next edition of this Standard is scheduled for publ
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11、Three Park Avenue,New York,NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distr
12、ibution is permitted.Uncontrolled when printed.CONTENTSForeword.vCommittee Roster.viB30 Series Introduction.viiiSummary of Changes.xiChapter 21-0Scope,Definitions,and References.1Section 21-0.1 Scope of B30.21.1Section 21-0.2 Definitions.1Section 21-0.3 References.7Chapter 21-1Chain Type.8Section 21
13、-1.1 Marking.8Section 21-1.2 Construction.8Section 21-1.3 Inspection.9Section 21-1.4 Testing.10Section 21-1.5 Maintenance.12Section 21-1.6 Welded Link Chain Inspection,Replacement,and Maintenance.13Section 21-1.7 Roller Chain Inspection,Replacement,and Maintenance.13Section 21-1.8 Operation.14Chapte
14、r 21-2Wire Rope Type.16Section 21-2.1 Marking.16Section 21-2.2 Construction.16Section 21-2.3 Inspection.17Section 21-2.4 Testing.19Section 21-2.5 Maintenance.20Section 21-2.6 Wire Rope Inspection,Replacement,and Maintenance.20Section 21-2.7 Operation.21Chapter 21-3Web Strap Type.23Section 21-3.1 Mar
15、king.23Section 21-3.2 Construction.23Section 21-3.3 Inspection.24Section 21-3.4 Testing.26Section 21-3.5 Maintenance.27Section 21-3.6 Web Strap Inspection,Replacement,and Maintenance.27Section 21-3.7 Operation.28iiiCopyrighted material licensed to Stanford University by Thomson Scientific(),download
16、ed on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.Figures1Manually Lever Operated Hoist Chain Type.22Manually Lever Operated Hoist Wire Rope.33Manually Lever Operated Hoist Web Strap.34Manually Lever Operated Hoist Chain Type.45Load Chain.56Guide and Load Sprocket-Strap.57Load Controlling Mechanism.68Overtravel Restraint.79Load Sprockets.710Swivel Type Hook.9Tables1Minimum Inspection for Lever Operated Hoists Chain.112Min
