1、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,Attachm
2、ents,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 interp
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12、ONTENTSForeword.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 Sa
13、ver.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 Chai
14、n 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
15、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 mo
16、re 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
