ASME_B73.3-2003.pdf

ASME B73.3-2003(Revision of ASME B73.3M-1997)Specification forSealless HorizontalEnd Suction MetallicCentrifugal Pumps forChemical ProcessAN AMERICAN NATIONAL STANDARDSThe American Society ofMechanical EngineersNo roproduction or notworking permitled without liconso from IHSNot for RosaleThe American Society ofMechanical EngineersA NA M E R ICA NN AT I O N A LST A N D A R DSPECIFICATION FORSEALLESS HORIZONTALEND SUCTION METALLICCENTRIFUGAL PUMPS FORCHEMICAL PROCESSASME B73.3-2003(Revision of ASME B73.3M-1997)No roproduction or notworking permitled without liconso from IHSNot for RosaleCONTENTSivCommittee Roster.Correspondence With the B73 Committeei1 Scope12 Alternative Design13Nomenclature and Definitions.14 Design and Construction Features15General Information.166References177Documentation18Figures1Pump and Driver Outline Drawing for Magnetic Drive Pumps.192 Pump and Driver Outline Drawing for Canned Motor Pumps.203 Pump Fluid Circulation Plans.224Cooling and Heating Piping Plans.255Typical Magnetic Drive Pump Performance Curve.266Typical Canned Motor Pump Performance Curve.27Form1 Sealless Centrifugal Pump Data Sheet.21Tables1Pump Dimensions for Magnetic Drive Pumps.22Baseplate Dimensions for Magnetic Drive Pumps.3Pump Dimensions for Canned Motor Pumps.74 Baseplate Dimensions for Canned Motor Pumps.95Approximate Performance of Standard Pumps(50 Hz).116Approximate Performance of Standard Pumps(60 Hz).12Minimum Continuous Flow,.,.,.,.,。,.,.13近so with ASMENo roproduction or notworking permitled without liconso from IHSNot for RosaleFOREWORDIn 1991 the ASME Standards Committee B73,Chemical Standard Pumps,formed a seallesspump working group to develop a standard for sealless pumps that would correspond to ASMEB73.1M,Specification for Horizontal End Suction Centrifugal Pumps for Chemical Process.Though these pumps are sealless(i.e.,they do not use a dynamic seal to prevent leakage aroundthe drive shaft),leakage can occur as a result of certain types of wear or misoperation.The usermust take appropriate supplemental safety precautions when operating these pumps.The first edition of this Standard was approved as an American National Standard on August7,1997.In the intervening years,work continued on a revision of ASME B73.1M.As that work drewnear to completion,the sealless working group began to develop a revision of the 1997 editionof ASME B73.3M to reflect the changes being made in ASME B73.1M.This revision of the Standardis the result of that work.Specifically,Some paragraphs were simplified and clarified.The presentation of units was changed to reflect that the U.S.Customary units were the primaryunits of measurement.The sections on flanges and flange loading were revised.Sound and vibration requirements were revised.Information concerning Operating Regionand NPSH Marginwas added.Auxiliary connection symbols were added.Additional pump sizes were added.Table 3 was revised to reflect changes in the Frame 1 pump dimensions.Table 7,Minimum Continuous Flow,was added.Form 1 was revised to reflect additional required values.Suggestions for improvement of this Standard will be welcome and should be sent to TheAmerican Society of Mechanical Engineers,Attn.:Secretary,B73 Committee,Three Park Avenue,New York,NY 10016-5990.This Standard was approved as an American National Standard on April 3,2003.No roproduction or notworking permitled without liconso from IHSNot for Rosale