1、AN AMERICAN NATIONAL STANDARDSpecification for Sealless Horizontal End Suction Metallic Centrifugal Pumps for Chemical ProcessASME B73.3-2003(Revision of ASME B73.3M-1997)Intentionally left blank AN AMERICAN NATIONAL STANDARDSPECIFICATION FORSEALLESS HORIZONTALEND SUCTION METALLICCENTRIFUGAL PUMPS F
2、ORCHEMICAL PROCESSASME B73.3-2003(Revision of ASME B73.3M-1997)Date of Issuance: September 10, 2004The next edition of this Standard is scheduled for publication in 2008. There will be no addenda orwritten interpretations of the requirements of this Standard issued to this edition.ASME is the regist
3、ered 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 Consensus Committee that approved the code or standard was balanced to assure that individuals fromcompetent and
4、concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not approve, rate, or endo
5、rse 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 forinfringemen
6、t of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expresslyadvised that the 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 repre
7、sentative(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
8、 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 EngineersThree Park Avenue, New York, NY 10016-5990Copyright
9、2004 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . vCorrespondence With the B73 Committee vi1 Scope . 12 Alternative Design 13 Nomenclature and Definitions . 14 Design and Construction Features . 15 General Information 166 Ref
10、erences . 177 Documentation . 18Figures1 Pump and Driver Outline Drawing for Magnetic Drive Pumps 192 Pump and Driver Outline Drawing for Canned Motor Pumps . 203 Pump Fluid Circulation Plans 224 Cooling and Heating Piping Plans . 255 Typical Magnetic Drive Pump Performance Curve 266 Typical Canned
11、Motor Pump Performance Curve . 27Form1 Sealless Centrifugal Pump Data Sheet 21Tables1 Pump Dimensions for Magnetic Drive Pumps 22 Baseplate Dimensions for Magnetic Drive Pumps . 53 Pump Dimensions for Canned Motor Pumps . 74 Baseplate Dimensions for Canned Motor Pumps 95 Approximate Performance of S
12、tandard Pumps (50 Hz) 116 Approximate Performance of Standard Pumps (60 Hz) 127 Minimum Continuous Flow 13iiiFOREWORDIn 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, Sp
13、ecification 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 supplem
14、ental 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 develo
15、p 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,W Some paragraphs were simplified and clarified.W The presentation of units was changed to reflect that the U.S. Customary units were
16、 the primaryunits of measurement.W The sections on flanges and flange loading were revised.W Sound and vibration requirements were revised.W Information concerning Operating Region and NPSH Margin was added.W Auxiliary connection symbols were added.W Additional pump sizes were added.W Table 3 was re
17、vised to reflect changes in the Frame 1 pump dimensions.W Table 7, Minimum Continuous Flow, was added.W 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.: Secr
18、etary, B73 Committee, Three Park Avenue,New York, NY 10016-5990.This Standard was approved as an American National Standard on April 3, 2003.ivASME STANDARDS COMMITTEE B73Chemical Standard Pumps(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSR. J. Hart
19、, ChairG. W. Sabol, Vice ChairC. J. Gomez, SecretaryCOMMITTEE PERSONNELB. M. Burkelman, ANSIMAG, Inc.K. R. Burkhardt, Alternate, E. I. DuPont de Nemours instead,snap-in plugs or waterproof tape shall be used to relievepossible pressure accumulation until piping is installed.4.14.5 Venting. The entir
20、e unit including casing, drivesection, and piping supplied by the manufacturer shallbe self-venting or furnished with vent connections.4.14.6 Identification. The manufacturers part identi-fication number and material designation shall be cast,clearly die stamped, or etched on the casing, cover, impe
21、l-ler, and containment shell. The manufacturers shall pro-vide identification on the product lubricated bearings(tagging is acceptable) to assist in parts identificationprior to assembly.4.14.7 Installation. All equipment provided shall bedesigned for unsheltered outdoor installation and opera-tion
22、at specified ambient temperatures.4.14.8 Frame (MDP). The frame shall be designed toresist a torque at least as high as the decoupling torquestrength of the largest drive magnets available for thatframe.The frame, when it clamps the rear cover plate to thepump casing, shall be made of a suitable duc
23、tile materialsuch as cast ductile iron or cast carbon steel.4.14.9 Baseplate Rigidity (MDP). Baseplates shall bedesigned according to ANSI/HI 1.3, Section 1.3.5.Baseplates, for separately coupled pumps, which are tobefreestanding(footor springsupportedratherthanheldby anchor bolts and grouted) shall
24、 be so structurally rigidas to limit movement of the driver shaft relative to thepump drive shaft to 0.002 in. (0.05 mm) parallel offsetwhen the driver torque of nameplate horsepower isapplied.4.15 Monitoring Devices4.15.1 Description. Devices or instruments whichindicate or control the condition of
25、 the sealless pump topreclude misoperation or damage to the unit should beavailable when specified.4.15.2 Temperature Probe. Sensing of temperature ofthe recirculation fluid and/or the containment shellshould be available when specified.4.15.3 Bearing Wear Detector. A device to detect axialand radia
26、l wear for a minimum of one bearing should beavailable when specified.4.15.4 Vibration. Receptacles, such as amachined con-ical recess forhandheld vibration probes ortapped bossesfor permanently installed probes, should be availablewhen specified. The location on separately coupled mag-netic drive p
27、umps shall be by the ball bearings on theframe in the horizontal position. For canned motor16pumps, the location shall be on the stator band in the hori-zontal and vertical positions.4.15.5 Motor. A device that monitors the motorshould be available when specified. This device maydetect one or more o
28、f the following:(a) power;(b) phase imbalance;(c) rotation;(d) under current;(e) over current;(f) single phasing; and(g) short circuit or internal malfunction.4.15.6 Circulation Fluid. A device to monitor the flowrateofthecirculationfluidshouldbeavailablewhenspec-ified. This requirement will only ap
29、ply to pumps withexternal circulation and does not apply to internal circu-lated pumps.4.15.7 Direction of Rotation Indicator (CMP). A direc-tion of rotation indicator should be available when spec-ified.4.15.8 Leak Detection. A device to detect leakage fromthe primary containment shell or liner sho
30、uld be availablewhen specified.5 GENERAL INFORMATION5.1 ApplicationApplication of sealless pumps requires more consider-ation than that for conventional centrifugal pumps. It isrecommended that anyone applying this type of equip-ment read para. 5.3 of ANSI/HI 5.1 through 5.6.5.1.1 Terminology. Pump
31、application and applicationterminology shall be in accordance with ANSI/HI 5.1through 5.6.5.1.2 Flange Loading. Allowable flange loadingimposed by the piping shall be in accordance with ANSI/HI 9.6.2.5.1.3 Sound. The maximum sound pressure level pro-duced by the pump and driver shall comply with the
32、 limitspecified by the customer. Tests, if specified, shall be con-ducted in accordance with ANSI/HI 9.1/9.5, Section 9.4.For separately coupled magnetic drive pumps, driverand pump noise data must be determined separately.5.1.4 Vibration. The vibration level measured on thestator/rear bearing housi
33、ng (CMP) or the frame (MDP)at the manufacturers test facility at the rated speed 5%and rated flow 5% shall not exceed twice the limitsshown in Fig. 9.6.4.4 of ANSI/HI 9.6.4.5.1.5 Hydraulic Coverage. Tables 5 and 6 show theapproximate hydraulic coverage for 50 and 60 Hz.SPECIFICATION FOR SEALLESS HOR
34、IZONTAL END SUCTION ASME B73.3-2003METALLIC CENTRIFUGAL PUMPS FOR CHEMICAL PROCESS5.1.6 Operating Region5.1.6.1 Design Region. Pumps shall be designed tooperate continuously between 110% of best efficiencyflow and the minimum flows shown in Table 7, unlessspecifically noted otherwise by the manufact
35、urer, andmeet the requirements of para. 5.1.4 (vibration) whenpumping water at ambient conditions.CAUTION: The values in Table 7 do not consider minimum ther-mal flow for a specific installation, therefore, the practical mini-mum operating flow may be higher than shown. Pumpage isheated as it goes t
36、hrough a pump and the minimum thermal flowis that where the temperature rises enough through the pump thatrecirculation of some of the flow reduces the available net positivesuction head below that required by the pump, resulting in cavita-tion. Refer to ANSI/HI 1.3 for detailed application informat
37、ion.5.1.6.2 NPSH Margin. An operating NPSH margin(NPSHANPSHR) is necessary to ensure satisfactoryoperation. A margin of 3 ft (0.9 m) or a margin ratio of(NPSHA/NPSHR) 1.2, whichever yields the greater dif-ference, is often adequate. Refer to ANSI/HI 9.6.1 foradditional application information.5.2 Te
38、sts5.2.1 Hydrostatic5.2.1.1 Standard Hydrostatic. After machining, allpressure-containing parts shall be hydrostatically testedfor 10 min. minimum with water at 1.5 times the maxi-mum design pressure corresponding to 100F (38C) forthe material of construction used.NOTE: The pressure rating of jacket
39、s may not be the same asrequired for pumpage-containing parts.When secondary control or secondary containment isspecified, the following hydrostatic testing must also beperformed. The secondary containment components, orin the case of secondary control, the secondary pressurecasing, shall be hydrost
40、atically tested in accordance withpara. 1.6.4 of ANSI/HI 1.6 or pneumatic tested in accor-dance with ND-6112 of the ASME Boiler and PressureVessel Code, Section III, Division 1, Subsection ND.5.2.1.2 Assembled Pump Hydrostatic Test. Whenspecified, the assembled pump test shall be in accordancewith p
41、ara. 1.6.4 of ANSI/HI 1.6.5.2.2 Hermetic Integrity Test. When specified, a her-metic integrity test shall be performed on the pump unitafter final assembly. Prior to testing, all liquid shall beremoved from all internal cavities.CAUTION: Wetted material moisture retention characteristicsshould be re
42、viewed against the application prior to testing. Nodisassembly is permitted after this test. This test shall be per-formed in accordance with para. 5.6.3 of ANSI/HI 5.1 through 5.6.5.2.3 Performance Test. When performance tests arerequired, they shall be conducted in accordance withANSI/HI 1.6, leve
43、l A. A complete written record of the17relevant test information including performance curves,the date of the tests, and the signature of the person(s)responsible for conducting the tests shall be delivered aspart of the pump documentation.5.2.3.1 Mechanical Integrity Test. When specified, amechanic
44、al integrity test shall be performed on the pumpto demonstrate that it will operate mechanically asdesigned. This test is intended to detect mechanical inter-ferences, ball bearing defects, and bushing bearing(s)defects. This test shall be performed in accordance withpara. 5.6.4 of ANSI/HI 5.1 throu
45、gh 5.6. This test isincluded in the optional performance test.5.2.3.2 Net Positive Suction Head Required (NPSHR)Test. When specified, an NPSHR test shall be performedin accordance with para. 1.6.6 of ANSI/HI 1.6. When thistest is specified, the performance test must also be spec-ified.5.2.3.3 Windin
46、g Integrity Test for Canned MotorPumps. The motor test shall be conducted in accordancewith para. 5.6.5 of ANSI/HI 5.1 through 5.6.5.2.4 Performance Curves. Published performancecurves shall be based on tests conducted in accordancewith para. 1.6.5 of ANSI/HI 1.6.5.3 NameplatesThe nameplate(s) is to
47、 be of 24 US Standard Gauge(minimum) AISI 300 series stainless steel and shall besecurely attached to the pump. It shall include pumpmodel, ANSI standard dimension designation, serialnumber, size, impeller diameter installed, material ofconstruction, maximum design pressure for 100F (38C),maximum al
48、lowable horsepower, and rated speed.Canned motor pump nameplates shall also include fullload motor data.6 REFERENCESThe following is a list of standards and specificationsreferenced in this Standard.ANSI/ABMA 9, Load Ratings and Fatigue Life for BallBearingsANSI/ABMA 11, Load Ratings and Fatigue Lif
49、e forRoller BearingsPublisher:AmericanBearingManufacturersAssociation,Inc. (ABMA), 2025 M Street, NW, Washington, DC20036ASME B15.1, Safety Standard for Mechanical PowerTransmission ApparatusASME B16.42, Ductile Iron Pipe Flanges and Flanged Fit-tingsASME B16.5, Pipe Flanges and Flanged Fittings1992 ASME Boiler and Pressure Vessel Code, includingaddenda through December 31, 1994, Section III, Divi-sion 1, Subsection NDASME B73.3-2003 SPECIFICATION FOR SEALLESS HORIZONTAL END SUCTIONMETALLIC CENTRIFUGAL PUMPS FOR CHEMICAL PROCESS1992 ASME Boiler and Pressure Ve
