1、ASME B73.2-2003(Revision of ASME B73.2M-1991)Specification forVertical In-LineCentrifugalPumps forChemicalProcessAN AMERICAN NATIONAL STANDARDSThe American Society ofMechanical EngineersNo roproduction or notworking permitled without liconso from IHSNot for RosaleFOREWORDThe vertical in-line style o
2、f centrifugal pump was introduced for chemical process use.Thesepumps have certain advantages,which have led to growing acceptance of this configuration forchemical process applications.In January 1969,in response to this interest,the ManufacturingChemists Association(MCA)requested that the American
3、 National Standards Institute(ANSI)develop a standard.In 1971 the scope of B73 was expanded to include vertical in-line pumps,using the MCA draft of February 1971 as a basis.American National Standard B73.2 was developed and was approved by the B73 StandardsCommittee;final approval by the American N
4、ational Standards Institute was granted on April21,1975.Shortly thereafter,the American National Standards Committee B73 revised the standard,introducing new information on critical speed,bearing housing design,vibration,bearing frameadapter,and bearings.The 1984 edition included,for the first time,
5、an appendix that covereddocumentation of pump and driver outline drawing,vertical in-line pump data sheet,mechanicalseal drawing,stuffing box piping plan,and cooling/heating piping plans.That edition was approved by letter ballot of the B73 Main Committee on April 25,1983.Following acceptance by the
6、 Sponsor,the revision was referred to the American National Stan-dards Institute for designation as an American National Standard.Designation was granted onMarch23,1984.In 1986,the Committee began discussing revisions that resulted in changes to the section onjackets.Additionally,the information on
7、stuffing box and seal chamber was expanded.Modifica-tions were also made to the appendix information drawings and plans.These revisions were approved by the B73 Committee.Following B73 approval,the proposalwas submitted to the American National Standards Institute for recognition as an AmericanNatio
8、nal Standard.Approval was granted on January 22,1991.With the expanding utilization of the ASME B73 pumps in the chemical process industry andits growing acceptance in hydrocarbons processing industry,the B73 committee has continuedto improve the B73.2 standard.This revision of the Standard incorpor
9、ates the addition of thetechnical documentation of the pump as a mandatory portion of the Standard,which previouslyappeared as a nonmandatroy appendix.The incorporation is partly in response to the needs ofthe user community for compliance to U.S.Government regulation covering chemical processequipm
10、ent and pumps,specifically OSHA Process Safety Management,29 CFR 1910.119.Recentpublications by the Hydraulic Insititute in areas such as preferred operating region and NPSHmargin have been incorporated into this revision.Additionally,the material of construction sectionwas expanded to include readi
11、ly available corrosion-resistant alloy.In total,these revisions tothe Standard are intended to better serve process industries and expand the use of ASME B73pumps worldwide.Suggestions for improvement in this Standard are welcome and should be sent to the Secretary,B73 Main Committee,American Society of Mechanical Engineers,Three Park Avenue,New York,NY10016-5990.This revision was approved as an American National Standard on September 10,2003.ivse with ASMENo roproduction or notworking permitled without liconso from IHSNot for Rosale