ASME_B30.20-2021.pdf

AN AM E R ICAN NAT IO NAL STANDARDASME B30.20-2021(Revision of ASME B30.20-2018)Below-the-HookLifting DevicesSafety Standard for Cableways,Cranes,Derricks,Hoists,Hooks,Jacks,and SlingsASME B30.20-2021(Revision of ASME B30.20-2018)Below-the-HookLifting DevicesSafety Standard for Cableways,Cranes,Derricks,Hoists,Hooks,Jacks,and SlingsAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USAxDate of Issuance:November 30,2021ThenexteditionofthisStandardisscheduledforpublicationin2024.ThisStandardwillbecomeeffective1yearaftertheDateofIssuance.ASME issues written replies to inquiries concerning interpretations of technical aspects of this Standard.Interpretations arepublished on the ASME website under the Committee Pages at http:/cstools.asme.org/as they are issued.Errata to codes and standards may be posted on the ASME website under the Committee Pages to provide corrections toincorrectlypublisheditems,ortocorrecttypographicalorgrammaticalerrorsincodesandstandards.Sucherratashallbeusedon the date posted.TheCommitteePagescanbefoundathttp:/cstools.asme.org/.Thereisanoptionavailabletoautomaticallyreceiveane-mailnotification when errata are posted to a particular code or standard.This option can be found on the appropriate CommitteePage after selecting“Errata”in the“Publication Information”section.ASME is the registered trademark of The American Society of Mechanical Engineers.ThiscodeorstandardwasdevelopedunderproceduresaccreditedasmeetingthecriteriaforAmericanNationalStandards.TheStandardsCommitteethatapprovedthecodeorstandardwasbalancedtoassurethatindividualsfromcompetentandconcernedinterestshavehadanopportunityto participate.The proposed codeorstandardwasmadeavailable forpublic reviewandcommentthatprovidesanopportunityfor 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 with respect to the validity of any patent rights asserted in connection with any items mentioned in thisdocument,anddoesnotundertaketoinsureanyoneutilizingastandardagainstliabilityforinfringementofanyapplicableletterspatent,norassumeanysuchliability.Usersofacodeorstandardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrights,andtherisk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted as government or industryendorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME proceduresand policies,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 EngineersTwo Park Avenue,New York,NY 10016-5990Copyright 2021 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.vCommittee Roster.viiB30 Standard Introduction.ixSummary of Changes.xiiChapter 20-0Scope,Definitions,Personnel Competence,Translations,and References.1Section 20-0.1Scope of ASME B30.20.1Section 20-0.2Definitions General.1Section 20-0.3Definitions for Chapter 20-1.1Section 20-0.4Definitions for Chapter 20-2.2Section 20-0.5Definitions for Chapter 20-3.2Section 20-0.6Definitions for Chapter 20-4.3Section 20-0.7Definitions for Chapter 20-5.3Section 20-0.8Definitions for Chapter 20-6.4Section 20-0.9Personnel Competence.4Section 20-0.10Translations.4Section 20-0.11References to Other Codes and Standards.4Chapter 20-1Structural and Mechanical Lifting Devices.5Section 20-1.1Scope.5Section 20-1.2Marking,Construction,and Installation.5Section 20-1.3Inspection,Testing,and Maintenance.9Section 20-1.4Operation.11Section 20-1.5Instruction Manuals.13Chapter 20-2Vacuum Lifting Devices.14Section 20-2.1Scope.14Section 20-2.2Marking,Construction,and Installation.14Section 20-2.3Inspection,Testing,and Maintenance.16Section 20-2.4Operation.18Section 20-2.5Instruction Manuals.20Chapter 20-3Close Proximity Operated Lifting Magnets.21Section 20-3.1Scope.21Section 20-3.2Marking,Construction,and Installation.22Section 20-3.3Inspection,Testing,and Maintenance.23Section 20-3.4Operation.25Section 20-3.5Instruction Manuals.28Chapter 20-4Remotely Operated Lifting Magnets.29Section 20-4.1Scope.29Section 20-4.2Marking,Construction,and Installation.29Section 20-4.3Inspection,Testing,and Maintenance.30iiiSection 20-4.4Operation.33Section 20-4.5Instruction Manuals.35Chapter 20-5Scrap and Material-Handling Grapples.36Section 20-5.1Scope.36Section 20-5.2Marking,Construction,and Installation.36Section 20-5.3Inspection,Testing,and Maintenance.36Section 20-5.4Operation.39Section 20-5.5Instruction Manuals.41Chapter 20-6Clamps.42Section 20-6.1Scope.42Section 20-6.2Marking,Constru