2013_2018.pdf

AN AM E R IC AN NAT IO NAL STANDARD ASME B29.21-2013Revision and Redesignation of ASME B29.21M-1996(R2003)700 Class Chains,Attachments,and Sprocket Teeth for Water and Sewage Treatment PlantsREAFFIRMED 2018ASME B29.21-2013Revision and Redesignation of ASME B29.21M-1996(R2003)700 Class Chains,Attachments,andSprocket Teeth forWater and SewageTreatment PlantsAN AMERICAN NATIONAL STANDARDTwo Park Avenue New York,NY 10016 USADate of Issuance:January 15,2014This Standard will be revised when the Society approves the issuance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard.Periodically certain actions of the ASME B29 Committee may be published as Cases.Cases and interpretations are published on the ASME Web site under the Committee Pages athttp:/cstools.asme.org/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 Pages can be found at http:/cstools.asme.org/.There is an option available toautomatically receive an e-mail notification when errata are posted to a particular code or standard.ThisoptioncanbefoundontheappropriateCommitteePageafterselecting“Errata”inthe“PublicationInformation”section.ASME 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 fromcompetent and concerned interests have had an opportunity to participate.The proposed code or standard was madeavailable forpublic review andcomment thatprovides an opportunityfor additional publicinput 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 anyitems mentioned in this document,and does not undertake to insure anyone utilizing a standard against liability forinfringement of any applicable letters patent,nor assumes any such liability.Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights,and the risk of infringement of such rights,isentirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME procedures and 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 2014 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword.ivCommittee Roster.vCorrespondence With the B29 Committee.vi1Nomenclature.12Definitions.2Figures1Cast Iron Chain With Chain Saver.42Cast Iron Chain Without Chain Saver.43Welded Steel Chain With Chain Saver.44Welded Steel Chain Without Chain Saver.45Stainless Steel Chain With Chain Saver.46Nonmetallic Chain With Chain Saver.47Dimensions of Chains.58Sprocket Tooth Form.10Tables1General Chain Dimensions,Ultimate Strengths,Proof Loads,Strand Length,and Chain Length Measuring Loads.62Maximum and Minimum Controlling Dimensions for Interchangeable ChainLinks Cast and Welded Steel Chain Only.83Chain Clearance Dimensions.94F22-6 Attachment.115F22-8 Attachment.126A-42 Attachment.137F-2 Attachment.148K-2 Attachment.159M-1 Attachment.1610Pressure Angle,Pitch Diameter,and Clearance Circle.1711Maximum Eccentricity and Face Runout at Bottom Diameter.1712Chain Saver Rim Diameters(Curved Sidebar Chains Only).18Mandatory AppendixIEngineering Characteristics.19iiiFOREWORDSince the development of this Standard in 1975 and the subsequent revisions published in 1981and 1996,it has been noted that within the marketplace the use of chains made from plastics orstainless steels has become more prevalent.In most cases these chains are derivations of thetraditional“700 Class”cast iron or welded steel chains that were the basis of the original Standard.These new products offer system designers alternatives in terms of strength,wear life,corrosionresistance,system weight,ease of maintenance,and cost.This revision incorporates the following product groups not found in previous editions of theStandard:Stainless steel fabricated chains(SS715 and SS709)Nonmetallic(plastic)chains(NM720)Sugg