ga-201

PDVSA N TITLE

REV. DATE DESCRIPTION PAG. REV. APPD. APPD.

APPD.BY DATEDATE

VOLUME 14

PDVSA, 1983

GA201 CENTRIFUGAL PUMPS

FOR APPROVAL

Jos Gilarrante Eduardo SantamariaMAR.86 MAR.86

ENGINEERING SPECIFICATION

MAY.86

MAR.93 L.T.

J.S.

1

0

GENERAL REVISION 30 R.P.

J.G.

A.N.

E.S.

ENGINEERING DESIGN MANUAL

ESPECIALISTAS

APPD.BY

REVISION FECHAENGINEERING SPECIFICATION

CENTRIFUGAL PUMPS MAR.931

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.Men Principal Indice manual Indice volumen Indice norma

Index1 SCOPE AND REGULATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 REFERENCE SPECIFICATIONS 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 PDVSA Engineering Specifications 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 CLASSIFICATION 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GENERAL REQUIREMENTS 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 PERFORMANCE CHARACTERISTICS 5. . . . . . . . . . . . . . . . . . . . . . . . 6 MECHANICAL CONSTRUCTION 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 MECHANICAL SEALS 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 AUXILIARY PIPING AND CONNECTIONS 9. . . . . . . . . . . . . . . . . . . . . 9 BEARING LUBRICATION 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 DRIVERS 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ELECTRIC MOTORS 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 STEAM TURBINES 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 GEARS 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 SHOP TESTS 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 PREPARATION FOR SHIPMENT 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 MEDIUMDUTY API CENTRIFUGAL PUMPS ADDITIONAL

REQUIREMENTS 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.2 General 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.3 Performance 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.4 Casing 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.5 Nozzles and Connections 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.6 External Nozzle Forces and Moments 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.7 Rotating Elements 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.8 Wear Rings 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.9 Mechanical Seals 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.10 Dynamics 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.11 Bearings 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.12 Materials 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.13 Drivers 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.14 Couplings 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.15 Mounting Plates 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



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16.16 Piping and Appurtenances 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.17 Inspection 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.18 Hydrostatic Test 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.19 Performance Test 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.20 NPSH Test 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.21 Preparation for Shipment 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.22 Proposal Data 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16.23 Contract Data 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17 HEAVYDUTY API CENTRIFUGAL PUMPS ADDITIONALREQUIREMENTS 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.1 Deletions 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.2 Additions 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.3 Substitutions 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



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1 SCOPE AND REGULATIONS1.1 This specifications covers the minimum requirements to be met by Seller in the

design, fabrication, inspection and testing of centrifugal pumps, their drivers andauxiliaries.

1.2 This specification requires compliance with all applicable Venezuelan codes andregulations.

2 REFERENCE SPECIFICATIONS2.1 Following standards, codes, and specifications, including applicable addenda,

shall form a part of this specifications, except as modified herein.

American Petroleum Institute (API)610 Centrifugal Pumps for General Refinery Services.American National Standards Institute (ANSI)B16.5 Pipe Flanges and Flanged FittingsB31.3 Chemical Plant and Petroleum Refinery PipingB73.1M Specification for Horizontal End Suction Centrifugal Pumps for

Chemical ProcessE101 Vertical Turbine Pumps Line Shaft and Submersible TypesHydraulic Institute StandardsCentrifugal Pumps SectionAmerican Gear Manufactures Association (AGMA)6011G92 Specification for High Speed Helical Gear Units. (Revision of

ACMA 421.06).6010E88 Standard for Spur, Helical, Herringbone, and Bevel Enclosed

Drives (Revision of AGMA 420.04).American Society for Testing and Materials (ASTM)A395 Standard Specification for Ferritic Ductile Iron Pressure

Retaining Castings for Use at Elevated Temperatures.B111 Standard Specification for Copper and CopperAlloy Seamless

Condenser Tubes and Ferrule Stock.B169 Standard Specification for Aluminum Bronze Plate, Sheet, Strip

and Rolled Bar.B171 Standard Specification for CopperAlloy Plate and Sheet for

Pressure Vessels, Condensers, and Heat Exchangers.



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B584 Standard Specification for Copper Alloy Sand Castings forGeneral Applications.

National Electric Manufactures Association (NEMA)SM 23 Steam Turbines for Mechanical Drive ServiceAmerican Society of Mechanical Engineers (ASME)Boiler and Pressure Vessel CodeSection VIII Rules for Construction of Pressure VesselsPar. UG84 Charpy Impact TestSection IX Qualification Standard for Welding and Brazing Procedures,

Welders, Brazers and Welding and Brazing OperatorsQW482 Suggested Format for Welding Procedure SpecificationQW483 Suggested Format for Procedure Qualification RecordAmerican Welding Society (AWS)A2.4 Standard Symbols for Welding, Brazing and NonDestructive

Examination.

2.2 PDVSA Engineering SpecificationsOil Mist Lubrications Systems PDVSAG260Piping Materials PDVSAH221General Purpose Steam Turbines PDVSAG203RTechnical Specification for TEFC Squirrel Cage InductionMotors 500 HP and Below PDVSAN251General Purpose Application of API 541 Formwound Squirrelcage Induction Motors 250 Horsepower and Larger PDVSAN268Special Purpose Application of API 541 Formwound Squirrelcage Induction Motors 250 Horsepower and Larger PDVSAN269Equipment Noise Control PDVSASN252Site Data PDVSASD251Utility Data PDVSASD252RWelding Procedures PDVSAPI060102

2.3 The requirements of this specification are additions to API 610. PAragraphnumbers in parenthesis ( ) refer to those used in API 610.

3 CLASSIFICATION3.1 General service pumps shall be manufacturers standard, except as modified by

this specification.



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3.2 Mediumduty API centrifugal pumps shall be in accordance with API 610, exceptas modified by this specification. The requirements of specificationPDVSAGA201 and API610 shall apply where they are more stringent than therequirements for medium duty pumps, section 16.0.

3.3 Heavyduty API centrifugal pumps shall be in accordance with API 610, exceptas modified by this specification. The requirements of specificationPDVSAGA201 and API610 shall apply where they are more stringent than therequirements for heavy duty pumps, section 17.0.

3.4 Horizontal and vertical inline chemical service pumps shall be per ANSI B73.1and B73.2.

3.5 The applicable standards will be specified in the Pump Data Sheets.

3.6 All pumps shall comply with applicable portions of the Hydraulic InstituteStandards and with additional requirements of this specification.

4 GENERAL REQUIREMENTS4.1 Pumps, drivers and auxiliaries shall be suitable for unsheltered outdoor

installation, and for startup and operation at specified minimum and maximumdesign ambient temperatures.

4.2 Pump units shall be furnished complete with pump, driver, gear if required,couplings and guards, mounted on a common baseplate with all requiredauxiliaries and piping.

4.3 Vertical pumps (except inline type) shall be furnished with mounting plates,suitable for grouting or attachment to pit cover, as specified.

4.4 Pumps, drivers and auxiliaries shall comply with Engineering SpecificationEquipment Noise Control, PDVSASN252.

5 PERFORMANCE CHARACTERISTICS5.1 (2.1.4) Pumps with constant speed drivers shall be capable of at least five percent

(5%) increase in head at rated conditions with the installation of a new impeller.

5.2 (2.1.11) The pump head at shutoff shall be approximately 110%, but not exceed120% of head at the specified capacity point. Low capacity, high head pumps maybe exempt from these requirements with the approval of Owner.



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5.3 Pumps operating in parallel shall have equal head rises from normal capacity toshutoff.

5.4 (2.1.9) All pums shall be suitable for continuous operation at 30% of the designcapacity.

5.5 For vertical pumps, Seller shall determine total differential head and differentialpressure based on specified discharge and suction pressure, specified differentialliquid level, plus Sellers drop column and discharge head loss. Bowl performancecurves shall be furnished.

5.6 Sump pumps shall be capable of generating the specified discharge pressure atminimum sump liquid level.

5.7 (2.1.12) Specified normal pump capacity shall not exceed capacity at theefficiency point. Rated capacity, if higher than normal capacity, may exceedcapacity the best efficiency point.

5.8 Available NPSH (net positive suction head) values specified in the Data Sheetswill be referred to the tope of the foundation for all pumps.

5.9 (2.1.9) Required NPSH values shall be shown on proposal Data Sheets at the topof the foundation and at the first stage impeller centerline.

5.10 (2.1.9) Required NPSH values shall not exceed available values over the entirerange from minimum to rated flow.

5.11 (2.1.9) At rated capacity, margins between required and available NPSH shall beat least 0.9 m (3 ft).

5.12 (2.1.9) Seller shall show suction specific speed (NSS) on Pump Data Sheets.Suction specific speed shall be stated at maximum impeller diameter and bestefficiency point (BEP). If the stated value exceeds the published values of theHydraulic Institute, Seller shall demonstrate in his quotation that the pumpoperation will be free of any harmful vibrational effects over the full range ofoperating capacity from rated to Minimum Continuous GPM. Thisdemonstration shall include actual shop performance data on vibration and/ornoise.

6 MECHANICAL CONSTRUCTION6.1 (2.2.2) Casing design temperatures are normally based on maximum operating

temperature plus 10% or 28 C (82 F), except where minimum temperature ismore critical.



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6.2 (2.3.1.1) Pump suction and discharge nozzles shall be flanged.

6.3 Flange ratings and facing will be specified in the Data Sheets.

6.4 (2.3.1.3) Raisedface flanges on Owners connections shall have the followingfinishes:

6.4.1 Class 150 and Class 300 flanges for operating temperatures from 101 C to 400 Cwill utilize asbestos gaskets and shall have flange finishes per ANSI B16.5.

6.4.2 All other flanges will utilize spiralwound, stainless steel asbestos gaskets andshall have a roughness of 125 to 200 AARH, unless specified otherwise in theindividual line classes. (See 6.4.2.a) for definition of the term AARH (ArithmeticalAverage Roughness Height), refer to ANSI B16.5.a. AARH Surfaces are to be compared by sight and feel with standard

roughness comparison specimen and not subject to rejection by tracer typeinstrument using stylus tracers and electrical amplification.

6.5 (3.2.2) All horizontal pumps shall be furnished with spacertype couplings andcoupling guards.

6.6 (2.5.7) Inline pumps with impellers mounted on extended motor shaft shall befurnished with shaft sleeves.

6.7 Unless otherwise specified, material shall be per API 610, Appendix H and K orOwner specifications.

6.8 (2.8.4.7) * Maximum allowable pump vibration amplitudes during shop tests andin the field shall be per API 610.

6.9 Requirements for vertical pumps are as follows:

6.9.1 Column and bowl assembly joints shall be flanged.6.9.2 Line shaft bearings shall be open, selflubricated except for solids carrying

services (as shown on Data Sheets). For these services, bearings shall belubricated from Owners clean external source.

6.9.3 Bowl shafts and head shafts shall be of corrosionresistant materials.

6.9.4 Line shaft bearings shall be supported by corrosionresistant spiders. Shaftsleeves of stainless steel shall be provided at each bearing unless the line shaftbe of such material.



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6.9.5 If required, coupling shall have provisions for impeller axial clearance adjustment.6.9.6 If enclosed impellers are furnished, replaceable bowl wear rings are required.6.9.7 Line shafts under 75 mm (3 in) in diameter may be joined by threaded couplings.

Larges shafts shall employ split hub rigid couplings.6.9.8 Pumps taking suction from open sumps shall be furnished with

corrosionresistant suction strainers. Strainer openings shall correspond tominimum widths of pumps internal fluid passages.

6.10 (2.8.4.13) Pump vibration shall not exceed the values show in paragraph(2.8.4.7), (2.8.4.8) and (2.8.4.9) from minimum continuous stable flow as quotedby the Pump Seller up to rated flow. Satisfactory vibration level shall bedemonstrated on test.

6.11 (2.5.4) Impellers for multistage pumps shall be individually secured against axialmovement in either direction along the shaft.

6.12 (2.9.1.7.1) Thrust collars for hydrodynamic thrust bearings shall be replaceable.

6.13 (3.2.7) Coupling shall be dynamically balanced when required to meet thevibration criteria of paragraphs (2.8.4.7), (2.8.4.8), and (2.8.4.9).

6.14 (3.3.1.3) All drivertrain pads on the baseplate shall be machined to allow forinstallation of stainless steel laminated shim packs, 3 millimeter (0.118 in)minimum thickness under the driver train. When the pump vendor provides thedriver, a set of stainless steel shim packs 3 millimeter (0.118 in) minimumthickness shall be included.

7 MECHANICAL SEALS7.1 (2.7.1.1) Mechanical seals shall be furnished for all pumps unless prohibited by

service conditions.

7.2 (2.7.1.10) Pump Seller shall furnish seal flush coolers or other means of sealcooling to maintain acceptable temperatures in the seal chamber.

7.3 (2.7.1.10) High temperature bellowstype seals shall be furnished for pumpingtemperatures above 315 C.

7.4 (2.7.1.13) Seal plates in flammable or toxic services shall be furnished withnonsparking throttle bushings to minimize leakage upon complete seal failure,and with quench and drain connections.



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7.5 (2.7.1.12) If external seal fluid reservoirs are required for tandem or auxiliaryseals, Seller shall furnish reservoirs, associated piping and instruments for theAPI plan specified.

7.6 (2.7.1.11) Throttle bushings shall be furnished in end plates of tandem seals forflammable and toxic services.

7.7 (2.7.1.12) Pump Seller shall show the seal chamber circulation rate and pressureon the Data Sheet under Auxiliary Piping for both internally and externallyflushed seals.

8 AUXILIARY PIPING AND CONNECTIONS8.1 (3.5.1.1) Pump Seller shall furnish all auxiliary piping for lubrication, cooling and

seal flush mounted on the pump and/or baseplate.

8.2 (3.5.4.1) Cooling water piping shall terminate in single inlet and outletconnections for each pump/driver unit.

8.3 (3.5.4.4) Seller shall supply hand control valves in each cooling water inlet andsight flow indicators in each outlet.

8.4 (3.5.4.4) For branched cooling water systems, hand control valves and sight flowindicators shall be furnished in each branch.

8.5 (3.5.2.5) Piping and controls for external seal flush will be supplied by Owner.

8.6 (3.5.1.4) External bearing flush lines for vertical pumps shall be manifolded to asingle connection located outside the suction vessel or sump.

8.7 (3.5.1.2) Valved vents shall be furnished for horizontal pump casings which arenot selfventing and for vertical pump seal chambers, if required.

8.8 (3.5.1.2) All horizontal and inline pumps, except those having lined casings orin erosive services, shall be furnished with casing drain connections.

8.9 (3.5.1.2) Casing drains for pumps in flammable or toxic services and pump withdrivers over 75 kW shall be valved. All other casing drains shall be plugged.

8.10 (3.5.2.9) Drain and vent valves, fittings and plugs shall be at least equivalent topump casings in material and pressure/temperature ratings. For cast ironcasings, these components shall be carbon steel.



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9 BEARING LUBRICATION9.1 (2.10.1) All horizontal pumps shall have oillubricated bearings, unless specified

otherwise.

9.2 (2.10.3) Pumps with nonpressurized oil lubrication shall be furnished withconstant level oilers with transparent containers and protecting wire cages.

9.3 (2.10.3.1) For pumps, gears and/or drivers requiring pressure lubrication, acommon, factory assembled lube oil system, either baseplate orconsolemounted, shall be furnished per Figure D6 of API 610.

9.4 (2.10.3.1) Pressure switches shall be singlepole, doublethrow type.

10 DRIVERS10.1 (3.1.1) Unless otherwise specified in the Data Sheet, pump drivers shall be

furnished and mounted by the pump manufacturer.

10.2 (3.1.4) Motor ratings, including motor service factor, shall be at least equal to thefollowing percentage of rated pump power.

Motor Nameplate Rating, hp Percent of Rated Pump Power25 and less 12530 hp to 75 115

100 hp and over 110

10.3 (3.1.10) Turbine drivers shall be rated for at least 110% of rated pump power atrated speed.

10.4 (3.1.1) (3.1.4) Driver rating for pumps operating in parallel, boiler feed and coolingwater services, and other services if specified, shall be at least equal themaximum power of rated impeller (end of capacity curve), in addition to therequirements of paragraph 10.2.

11 ELECTRIC MOTORS11.1 Motor drivers shall comply with Engineering Specifications PDVSA N251

Technical Specification for TEFC Squirrel Cage Induction Motors 500 HP andBelow, PDVSA N268 General Purpose Application of API 541 FormwoundSquirrelcage Induction Motors 250 Horsepower and Larger o PDVSA N269Special Purpose Application of API 541 Formwound Squirrelcage InductionMotors 250 Horsepower and Larger.



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11.2 (3.2.9) Sleeve bearing motors shall be furnished with couplings designed to limitaxial movement of motor rotors.

11.3 (3.1.9) Motor thrust bearings for vertical pumps shall be designed for thrust loadsgenerated over the entire pump operating range.

12 STEAM TURBINES12.1 Steam turbines shall comply with Engineering Specification General Purpose

Steam Turbines, PDVSA G203R.

12.2 (3.1.10) Turbine governors shall be hydraulic relaytype, as minimum.

12.3 For pumps operating in parallel, turbine governors shall be NEMA Class C.

12.4 Flange facings shall comply with paragraph 6.3.

13 GEARS13.1 Gear units shall comply with Engineering Specification Special Purpose Gear

Units, PDVSAG202OR.

13.2 (3.1.1) Gear nameplate ratings shall be at least equal to the driver rated power,including driver service factor.

14 SHOP TESTS14.1 (4.1.1) Inspection by Owners representative is required.

14.2 (4.3.2.1) All pumps shall have hydrostatic and running/performance tests.

14.3 Test equipment and procedures shall be in accordance with the Hydraulic InstituteStandards.

14.4 (4.3.4.1) NPSH test are required if specified or if the available NPSH exceeds thatrequired by the pump at rated capacity by less than 0.9 m (3 ft).

14.5 (4.3.4.1.1) NPSH tests, if required, shall be conducted at a minimum of fivecapacity points from minimum to maximum flow.

14.6 (4.3.4.1.2) During NPSH tests, onset of cavitation shall be indicated by 3% dropin differential head.



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14.7 (4.3.3.2.1) Performance tests shall be conducted at a minimum of five capacitypoints from shutoff to maximum flow.

14.8 (4.3.3.3.3) Acceptable tolerances of actual vs. guaranteed pump performanceshall be per API 610.

14.9 Vibration levels shall be measured during shop running/performance tests.

14.10 (4.3.3.1.1) Contact mechanical seals shall be used during shop tests unless sealdesign is unsuitable for the test conditions.

14.11 (4.4.3) Pumps shall not be released for shipment until shop test data andperformance test curves are approved by Owner.

14.12 (2.11.4) For pumping temperatures below 29 C (20 F), carbon steel materialsshall be impacttested per ASME code Section VIII, Division 1, Par. UG84.Certified impact test reports shall be furnished to Seller.

14.13 (4.3.3.3.1) Turbine driven pumps shall be operated on mechanical test up to theoverspeed trip speed of the governor for a minimum of 5 minutes. Vibration levelshall not exceed the value of rated conditions by more than 13 micrometers (0.5mils).

15 PREPARATION FOR SHIPMENT15.1 (4.4.3.4) Unpainted surfaces shall be protected from corrosion during shipment

and subsequent outdoor/indoor storage by coating with rust preventive equal tothose shown.



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RUSTBAN GRADE (1)SURFACE PETROLATUM

BASE (HOTAPPLICATION)

SOLVENTCUTBACK

OIL TYPE

Exterior, machined 324 373,397,385Interior:

a. Machined or Threadedb. Equipment in Lubeand

Seal Oil System

357,623357,623

Spare Parts (2) 324, 373,397,385 357,623

Notes:

1. Grade selection to be based on expected exposure, removabilityrequirements, etc.

2. After coating, suitable time shall be allowed for the protective film to set (coolingdown of hotdip products and solvent evaporation of solventcutbackproducts). The coated parts shall then be wrapped in heavy moistureproofpaper.

3. The oil type rust preventive listed are medium viscosity (300800 SSU at 100F, or 57150 cSt at 40 C) products that provide film suitable coating fornormal condition Rust Ban 335,337, and 353 are acceptable for applicationwhere a low viscosity rust preventive is required.

16 MEDIUMDUTY API CENTRIFUGAL PUMPS ADDITIONALREQUIREMENTS

16.1 (1.1.1) This engineering specification covers mandatory requirements for singleand twostage horizontal and vertical centrifugal pumps having rated serviceconditions between 29 C to 150 C (20 to 300 F) and not exceeding either 21.1kg/cm2 (300 psig), 110 cu. meters/hour (500 GPM) or 3600 rpm.

16.2 General16.2.1 (2.1.7) Pumps designed with mechanical seals shall combine the use of throat

bushings, wear rings, impeller balance holes and flushing line arrangements toensure a stuffing box pressure in excess of suction pressure, ensure that thetemperature and pressure in the stuffing box prevents vaporization, and providea continuous flow through the seal chamber.



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16.3 Performance16.3.1 (2.1.11)

a. The head curve for the pump shall be continuously rising from the specifiedcapacity point to shutoff point.

b. Pumps for parallel operation shall have equal head rise to shutoff.16.3.2 (2.1.6) General dimensions of ANSI B73.1 are preferred for single stage

horizontal pumps.

16.3.3 (2.1.2) Manufacturers shall minimize the number of pump and subassemblytypes furnished for particular project.

16.4 Casing16.4.1 (2.2.5) Radially split case pumps are required for all services.16.4.2 (2.2.2) If more than 3 mm (1/8) corrosion allowance is required, it shall be

specified.

16.4.3 (2.2.3) All pumps shall be single casing type.16.4.4 (2.2.7) Casings of inline pumps shall be split perpendicular to the shaft and shall

not require rigid support from the foundation. The design of inline pums shallpermit removal of rotor without disconnecting the main piping.

16.5 Nozzles and Connections16.5.1 (2.3.2.10) A selfventing pump is one that is designed to prevent the buildup of

vapor within the impeller, which would cause loss of suction on starting.16.5.2 (2.3.2)

a. Drilled or tapped openings in the high velocity areas are not permitted if thespecified corrosion allowance of the pump casing is more than 3 mm (1/8)or if the pump is in acid or erosive service. Suction and discharge nozzlesand stuffing boxes are not considered high velocity areas. Bosses for futurecasing drain opening shall be provided.

b. Unless prohibited by 16.5.2a, the pump casing shall be furnished with adriller and tapped drain opening. The opening shall be plugged unless avalved drain is specified.

c. Unless an internal passage is provided in the pump, connections formechanical seal selfflushing lines shall be made on either the suctionand/or discharge nozzle, or the pump casing, if drilling and tapping of thepump casing is permitted.



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d. All required vents shall be valved.e. Gate valves per PDVSA H221 shall be used for vents and drains.

16.5.3 (2.3.2.2)a. Connections for seal oil lines shall be 10 mm (3/8 in) NPS or larger.b. Valved vent and drain connections shall be braced.c. Bracing design shall be as follows:

1. Gusseting material for welded gussets shall be of the same nominalchemistry as the connected parts except that carbon steel may be usedfor gusseting materials with P numbers 1,3,4 and 5.

2. Connections shall be braced in two planes with gussets having aminimum thickness of 5 mm (3/16), minimum with 19 mm (3/4), as showin figure (1)

Fig 1.

Two plane gusseting

9 in max.(225 mm)

Equipment Wall Two plane gusseting( Approx. 90 apart.)

8 in. max.(200 mm)

Min. distance to satisfy

Cloarance requirements

Equipment Wall

General Note:Bracing detailappliable to ex-tended body typevalve, or com-pact body valveplus nipple (asillustrated)

Acceptable bracing desing for equipment only where pipe bend necesary

3. Heat treatment and hardness requirements for gusset attachment weldsshall be as specified for non pressure attachments to piping andequipment, for respective ends of the gussets.

16.5.4 (2.3.2.8) Flange ratings, facing, and finish will be specified in the Data Sheets.16.5.5 (2.3.2.9) Flanged suction and discharge nozzles shall be integral with the casing.

16.6 External Nozzle Forces and Moments16.6.1 (2.4) The following criteria shall also apply to steel or alloy steel pumps having

discharge nozzle greater than 100 mm (4 in NPS), and for cast iron pumps in allsizes.

16.6.2 (2.4)a. For steel or alloy steel pumps having a discharge diameter greater than 100

mm (4 in NPS), and for cast iron pumps, each nozzle shall be capable ofwithstanding forces from external piping loads as follows:



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1. For forces parallel to the nozzle axis:F < 200 lbf per nominal inch

2. For forces perpendicular to the nozzle axisF < 100 lbf per nominal inch

b. Each nozzle shall be designed to withstand a moment imposed at the nozzleflange from external piping as determined by the following formula:

M = S x ZWhere: M = Design Moment, lbf.in

S = Nozzle bending stress limitation, psi, equivalent to the lesserof:

a. Carbon or alloy steel pumps: 0, 75 Sh or 1, 5 ShDb. Cast Iron pumps: 0, 75 Sh or 18.000DSh = Allowable hot stress for the pump casing material, psi(stresses per ANSI B31.3 Appendix A, Table 1)D = Nominal nozzle size, in.Z = Section module of pipe, in3, for pipe of Diameter D, andthickness equivalent to:a. ANSI Class 400 or lower rating flanges: SCH STD.b. ANSI Class 600 or higher rating flanges: SCH XS

Note: In calculations using SI terms for Nozzle Force (F) and Design Moment (M,per sub par. a. and b. above).

SPECIFIED TERM ACCEPTABLE METRIC EQUIVALENT

F < 200, lbf/in F < 35.6 N/mm

F < 100, lbf/in F < 17.8 N/mm

M, lbf in. M, N.m

1, 5 ShD

0.26 ShD

18, 00D

3100D

Sh, psi No change. Use ANSI B31.3 values,psi

D, in. (25) x in. = mm

Z, in. 3 (1.64 x 105) x in3. = m3



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16.7 Rotating Elements16.7.1 (2.5.3) Only solid hub impellers are acceptable.16.7.2 (2.5.6) Shaft sleeves are required on all pumps having impellers mounted on

extended motor shafts.16.7.3 (2.5.6) Shaft sleeves shall also extend beyond seal end plate on pumps

employing throttle bushings.16.7.4 (2.5.10) Tolerance on shaft diameter shall not exceed 0,025 mm (0,001 in) and

on sleeve diameter through the stuffing box shall not exceed +0.000 to 0.05 mm(+0,000 to 0,002 in).

16.8 Wear Rings16.8.1 (2.6.1)

a. Renewable casing and impeller wear rings are required for all closed andsemiopen impellers in services containing abrasive solids.

b. If specified, provision shall be made for flushing wear rings and throatbushings.Flushed wear rings shall have a circumferential groove to ensure distributionof flushing liquid. The axial position of the groove shall be selected to ensureequal flow to the high and low pressure sides of the wear rings.

16.8.2 (2.6.6) Pump clearances shall be manufacturers standard for the pump materialsand the specified service.

16.9 Mechanical Seals16.9.1 (2.7.1.5) Seal plates for carbon steel and cast iron casings with specified

corrosion allowances over 3 mm (1/8 in) shall be 18 Cr. 8 Ni.16.9.2 (2.7.1.6) The stationary seal member shall be mounted in the seal plate with a

circumferential Oring or other flexible sealing element.16.9.3 (2.7.1.7) Seal plates shall be labeled to identify cooling, flushing, vent, and drain

connections.16.9.4 (2.7.1.12)

a. Flushing connections for vertical inline pumps shall be made at the sealplate to eliminate vapor pockets in the stuffing box.

b. Minimum flushing fluid piping size shall be 10 mm (3/8 in NPS).c. Seal plates shall be drilled for flushing. Where flushing through the seal plate

is non standard for the manufactures, alternate arrangements requireapproval by the Owners Engineer.



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16.9.5 (2.7.1.10) The Flushing fluid of stuffing box shall not be water cooled.16.9.6 (2.7.1.14) Deflectors shall also be furnished on vertical inline pumps.16.9.7 (2.7.1.16) An Orings is not an acceptable gasket.

16.10 Dynamics16.10.1 (2.8.4.1) Manufacturers standard procedure for static and dynamic balancing is

acceptable provided the vibration conforms to the limit specified in par (2.8.4.7),(2.8.4.8) and (2.8.4.9).

16.10.2 (2.8.4.7), (2.8.4.8) and (2.8.4.9) Total dynamic shaft deflection (radial hydraulicforce plus vibration double amplitude) under maximum hydraulic load shall notexceed 0,05 mm (0,002 in) at the stuffingbox face.

16.11 Bearings16.11.1 (2.9.1.1) Antifriction thrust bearings shall be single row, angular contact,

arranged to accommodate thrust in either direction, duplex mounting minimum.16.11.2 (2.9.1.3) The use of snap rings for locating and/or transmitting loads for

antifriction thrust bearing is not acceptable.16.11.3 (2.9.2.2) Adjustable constant level oilers with transparent containers and

protecting wire cages shall be provided for feeding nonpressurized oillubricatedbearings.

16.11.4 (2.9.2.5) Bearing oil temperature limits shall not be kept or controlled with watercooling.

16.11.5 (2.9.2.8) Oil mist lubrication, when specified, shall be per EngineeringSpecification, Oil Mist Lubrication Systems, PDVSAG260.Note: Pumps shall be designed for operation with both dry sump

lubrication (i.e., pure mist) and purge mist. However, initialoperation shall be with purge mist.

16.12 Materials16.12.1 (2.11.1.4) Steel casings are required for any pump located within process unit

areas handling a stream containing any flammable or toxic materials. If specialnonferrous materials are required, the Owner shall specify the casing material.Cast iron casings may be used for pumps located outside process unit areas perAPI 610.

16.12.2 (2.11.2.2) Chaplets in casings other than cast iron not completely fused intopressure casings or other defects shall be replaced by weld metal equivalent to



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the casing composition. No other repair method is permitted. Casings shall beheat treated following any major repairs.

16.12.3 (2.11.2.3) For water service only, the repair of leaking chaplets in Gray Ironpressure casings is permissible by plugging in accordance with par. 8.2, of ASTMA395. Repair of other defects in cast iron pressure casings by impregnationwelding, burning, brazing, etc. is not permissible.

16.12.4 (2.11.3)a. When submittal of welding procedure specification and procedure

qualification records (ASME QW482 and QW483 or equal) is required,these shall be submitted to Owners welding engineer prior to start offabrication. Welding shall not proceed until these documents are returnedto the manufacturer with authorization to proceed. These submittals shallcomply with document Welding Procedures, PDVSA PI060102 andadditional requirements listed below. Welders performance qualificationsshall conform to the requirements of Section IX of the ASME Code.Compliance with these requirements and Owners authorization of weldingprocedure specifications and procedure qualifications records shall in noway relieve the manufacturer of the responsibility of providing welds whichare sound and suited to the service for which they are intended.1. Welding symbols shall be in accordance with AWS A2.4.2. A typical weld map or sketch shall be submitted showing all typical joints

and the welding procedures to be used on each joint. This typical weldmap or sketch may include more than one tag item number, so long aseach tag item is clearly identified on the page.

3. A welding summary sheet for each item shall be submitted, listing all thewelding procedures to be used, record material identity, thickness, impacttesting, and PWHT. These sheets may apply to more than one tag itembut each item must be clearly identified.

4. A separate one page welding description data sheet for each weldingprocedure submitted shall also be submitted.

b. Welding procedures shall be submitted to the Owner for authorization toproceed for:1. Major weld repairs of alloy steel pressure containing castings when the

repair is to be accomplished at a location other than the foundry and/orafter machining has commenced.

2. Fabrication welding of alloy steel pump cases of alloy steel pipingsystems.

3. Fabrication welds to pressure containing carbon steel forgings.c. Welding procedures are not required to be submitted to the Owner for:



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1. Carbon steel (except forgings).2. Seal welds of screwed connections.3. Weld to nonpressure containing parts.

16.13 Drivers16.13.1 (3.1.13) Drivers for vertical inline pumps shall be aligned and dowelled by the

pump Seller in his shop to ensure proper fitup and shaft mating.

16.14 Couplings16.14.1 (3.2.2) Coupling material shall be of steel, and of the nonlubricated, lamined disc

type with stainless steel discs.16.14.2 (3.2.2) Spacer type couplings shall be furnished only where required for removing

the rotor whithout dismantling the main piping.16.14.3 (3.2.14) Coupling guards shall be fabricated from 2.8 mm (0.108 in) galvanized

steel sheet. Guards shall be provided with hinged door for inspection of flexibleelements.

16.15 Mounting Plates16.15.1 (3.3.1.8) Grouting holes are required only on fabricated baseplates and may be

manufacturer s standard size.16.15.2 (3.3.1.5)

a. Pumps having a discharge nozzle larger than 100 mm (4 in NPS) shall alsomeet these requirements.

b. Shaft displacement, measured at the coupling shall be maximum of 0.13 mm(0.005 in) when subject to the loads designated by this paragraph.

16.15.3 (3.3.1.5) The Seller shall make available optional heavier baseplate and pedestalsupport assemblies, designated 2X for twice as rigid and 4X for four times as rigid.The characteristic of these assemblies shall be to limit shaft displacement,measured at the coupling, to 0.13 mm (0.005 in) for:

2X = Twice the external forces4X = Four times the external forces

16.15.4 (3.3.1.13) Not applicable.16.15.5 (3.3.1.14) Baseplates shall include driver alignment jacking bolts for all motor

driven pumps greater than 75 kW.16.15.6 (3.3.1.1) Pumps in corrosive services shall have provisions to collect and drain

packing or seal leakage. Corrosion resistance of the drain system shall be equalto the pump casing.



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16.16 Piping and Appurtenances16.16.1 (3.5.1.2) Pumps shall be designed to operate without cooling.16.16.2 (3.5.2.9) Required vents and drains shall be supplied in compliance with the

followings:a. A nipple shall be supplied, socket welded or screwed and seal welded to the

case.

b. The vent and/or drain shall terminate with a socket welded steel gate, valve,Vogt SW # 2081 or similar.

16.16.3 (3.5.2.11) Piping material and corrosion allowance shall be equal to the casing.Carbon or alloy steel piping and flanges shall be provided with cast iron pumpcasings.

16.17 Inspection16.17.1 The term Inspector, as used in this specification, refers to the Owners

representative.

16.17.2 (4.1.6) Inspection shall include verification of the equipment dimensions,examinations of test data and checking preparation for shipment.

16.18 Hydrostatic Test16.18.1 (4.3.2.1) Pump casings and covers shall be hydrostatically tested at 1.5 times the

maximum discharge pressure or plus 50 psig whichever greater. All hydrostatictest shall be maintained for a minimum of 30 min. Large and heavier casting mayrequire a longer testing period.

16.18.2 (4.3.2.1b) Not applicable.



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16.19 Performance Test16.19.1 (4.3.3) All pumps shall be operated for at least one hour at rated speed and

capacity.16.19.2 (4.3.3.2.2) Test records shall also include measured shaft vibration amplitudes.16.19.3 (4.3.3) The purchasers driver shall not be used for shop testing.16.19.4 (4.3.3.3.3) In no case shall the minus tolerance allowance for shutoff head exceed

2%. The shutoff head with the positive tolerance allowance included shall notexceed 120% of the head at rated capacity.

16.20 NPSH Test16.20.1 (4.3.4.1) NPSH tests based on suction valve throttling are not acceptable.16.20.2 (4.3.4.1) A 1% drop in head shall indicate cavitation.

16.21 Preparation for Shipment16.21.1 (4.4.3.5) Unpainted surfaces shall be protected from corrosion during shipment

and subsequent outdoor/indoor storage by coating with rust preventive equal tothose show below.

RUSTBAN GRADE (1)SURFACE PETROLATUM

BASE (HOTAPPLICATION)

SOLVENTCUTBACK

OIL TYPE

Exterior, machined 324 373,397,385Interior:

a. Machined or Threadedb. Equipment in Lubeand

Seal Oil System

357,623357,623

Spare Parts (2) 324, 326 373,397,385 357,623Notes:

1. Grade selection to be based on expected exposure, removability requirements,etc.

2. After coating, suitable time shall be allowed for the protective fils to set (coolingdown of hotdip products and solvent evaporation of solventcutback products).The coated parts shall then be wrapped in heavy moistureproof paper.

3. The oil type rust preventive listed are medium viscosity (300800 SSU a 100 F,or 57150 cSt a 40 C) products that provide a suitable coating for normal



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condition Rust Ban 335,337, and 353 are acceptable for application where a lowviscosity rust preventive is required.

16.22 Proposal Data16.22.1 (5.1.a)

a. Owner shall submit the standard data sheet (Appendix A) with his inquiry.b. Data sheets shall specify minimum corrosion allowance required in the

pump casing.16.22.2 (5.1.f) Seller shall submit extra costs for baseplate and pedestal support systems

for horizontal pumps designated at 2X and 4X per paragraph 16.15.3 when thefollowing conditions exist:1. (Dd + Ds) x (T38) > 41,000Where Dd = nominal nozzle size, discharge, mm

Ds = nominal nozzle size, suction, mmT = pump design temperature, C

2. Dd > 100 mm (4 in)3. As specified by Owner based on evaluated piping layout considerations.

16.23 Contract Data16.23.1 (5.2.3) Crosssectional dimensioned drawings of the stuffing box, seal, gland,

shaft sleeve, and proposed flushing arrangement for the mechanical sealfurnished shall be provided.A parts list/bills of materials shall be furnished for all equipment supplied and shallinclude pattern stock, or production drawing numbers and materials ofconstruction. The list shall completely identify each part so the Owner maydetermine part interchangeability with other equipment furnished by the samemanufacturer. Antifriction bearings and other standard purchased items shall beidentified by the original manufacturers number.

17 HEAVYDUTY API CENTRIFUGAL PUMPS ADDITIONALREQUIREMENTS

The requirements given for medium duty centrifugal pumps should be modifiedaccording to the following instructions before they can be applied to heavy dutycentrifugal pumps.

17.1 DeletionsDelete following requirements from the Set of Requirements Given for MediumDuty Centrifugal Pumps.



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16.1.1; 16.3.3; 16.7.4; 16.9.4c; 16.9.6; 16.10.1; 16.14.2; 16.15.6.

17.2 AdditionsAdd following requirements to the Set of Requirements Given for Medium DutyCentrifugal Pumps.

17.2.1 Scopea. (1.1.1) Seller qualification. Pumps rated over 375 kW (500 HP) shall be

supplied by Sellers qualified by experience to manufacture the unitsproposed. To qualify, a Seller must have at least two pumps of comparablerating and design performing satisfactorily in a similar service.

17.2.2 Nozzles and Connectionsa. (2.3.1.1) Flanged suction connections shall be suitable for the maximum

suction pressure and pumping temperature. The ANSI permissiblehydrostatic test pressure of suction flanges shall be equal to, or greater than,the pump casing hydrostatic test pressure.

17.2.3 Rotating Elementsa. (2.5.13) The shaft stiffness requirements for multistage horizontal pumps

shall be the same as for one and two stage horizontal pumps.17.2.4 Mechanical Seals

a. (2.7.1.6)1. Multistage, vertical pumps and between bearings type horizontal pumps

shall be provided with cartridgetype seals with the shaft sleeve installedfrom outside the stuffing box. The seals shall be removable withoutdisturbing the driver.

2. For services where temperature precludes use of 0ring, details of shaftsealing arrangement shall be submitted to Owner for approval by OwnersEngineer.

3. The stationary seal member shall be mounted in the seal plate with acircumferential 0ring or other flexible sealing element.

b. (2.7.1.7) Seal plates shall be labeled to identify cooling water, flushing vent,and drain connections.

c. (2.7.1.9) Builtin seal designs are unacceptable.d. (2.7.1.1) Mechanical seals shall be furnished in all centrifugal pumps

operating below 400 C except for services where they will have limitedoperating life. Hightemperature mechanical seals shall be provided forpumps in service above 315 C. A hightemperature seal is a seal which



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will operate continuously at the design pumping temperature without the useof externally cooled flushing liquids.

e. (2.7.2.5) Flexible hose to the quench gland is not acceptable.f. (2.7.1.1) Firewater pumps shall have packing.

17.2.5 (2.8.4.9) For vertical pumps, the pump shaft or shaft sleeve runout as measuredby hand, shall not exceed 0,05 mm (0,002 in) total indicator reading before andafter the mechanical running test.

17.2.6 Bearingsa. (2.9.1.7) & (2.7.1.10) Application of pump cooling water shall be as follows.

Pumps with nonpressurized bearing lubrication, and pumpingtemperatures under 200 C (400 F) shall be designed to operatecontinuously without use of cooling water for bearings, pedestals, andstuffing boxes. Bearing oil temperatures shall not exceed 82 C (180 F)based on specified operating conditions and 43 C (110 F) ambient andshall assume no credit for motor cooling air.Cooling water may be used for cooling seal flush liquid where required toassure proper mechanical seal operation.

b. (2.9.3.2) All vertical pumps with thrust bearings shall be equipped with oillubricated bearings.

17.2.7 Lubricationa. (2.10.3) Where pressure lubrication is furnished, low oil pressure shutdown

devices shall be provided; lowpressure alarms shall be provided whenspecified. Where very low operating speed are anticipated, these speedswill be specified, and lubrication of the pump shall be given specialconsideration.Pumps with pressure oil systems shall have the following items included inthe oil system:

1. Main and auxiliary pumps. The following arrangements are acceptable:a. Shaftdriven main and motor or turbine driven auxiliary pumps.b. Motordriven main and steamturbinedriven auxiliary pumps.

2. The auxiliary lube oil pump shall be controlled to automatically startup in andprovide oil pressure to maintain safe operation upon failure of the main pumpor reduction in pressure for other reasons.

3. Horizontal pumps shall have positive suction heads an suction lines slopedto vent to the reservoir.

4. The standby pump shall not shutdown by itself. Manual shutdown isrequired.



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5. A separate oil cooler of the shell and tube type.6. Materials of construction for coolers in fresh water cooling service shall be

carbon steel. Materials for salt water cooling service shall be as follows:

SHELLCHANNELS &

COVERS TUBE SHEETS TUBESSHELLMaterials Spec. Materials Spec. Materials Spec.

Carbon

AcidResistingBronze or

ASTMB584AlloyC92200 Naval

ASTMB171 Inhibited

ASTMB111

CarbonSteel

AluminumBronze

ASTMB169AlloyC61400

NavalBrass

Alloy464

AdmiraltyBrass

Alloy 443444 or 445

7. A cartridge filter with a carbon steel pressure casing and with maximumclean pressure drop of 0.35 kg/cm2 to filter particles exceeding 5 m in size.Filter shall be located downstream of the lube oil cooller.

8. Piping arrangement shall not permit bypassing oil around the filter.9. A pressure gauge (valved for removal) for each pressure level, and a means

to indicate differential pressure across the filter.10. Dial type thermometers before and after the oil coolers.11. An oil reservoir with the following characteristics:

a. Capacity to adequately settle moisture and foreign matter to avoidfrequent refilling, and adequate allowance for the contents of thesystem when drained.

b. Provisions to eliminate air and to minimize flotation of foreign matterto pump suction.

c. Fill connections, level indicators, and breathers suitable for outdooruse.

d. Sloped bottoms and connections for complete drainage.e. Cleanout openings as large as practical.f. Reservoir material shall be 300 series stainless steel.



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g. When required, a steamheating coil external to reservoir, or alowwatt density, thermostatically controlled electrical immersionheater, shall be provided for heating the oil prior to startup in coldweather. The heating device shall be enought able to heat oil fromminimum site ambient temperature to manufacturers minimumrequired temperature in 4 hours. Reservoir shall be fitted with supportclips for thermal insulation. The Owner will furnish and install anyinsulation.

h. An oilreservoir breather with suitable filter. The oil filter elements andoil reservoir breather elements shall have a 5 m absolute rating.

12. Austenitic stainless steel lube oil piping downstream of the lube oil filter.13. Sight flow indicators on each bearing drain line.

17.2.8 Couplingsa. (3.2.8.10) In services with pumping temperatures up to 150 C (300 F),

vertical inline pumps of either one piece extended motor shaft constructionor coupled shaft design are acceptable. With pumping temperature 150 C(300 F) and above, inline pumps shall be of rigidly coupled, separate pumpand driver shaft design.

17.2.9 Piping and Appurtenancesa. (3.5.4.2) Cooling water shall be per Manufacturer standard.b. (3.5.4.4) The use of sight flow indicators shall be per Manufacturer

standard.c. (3.5.4.1)

1. Carbon steel shall be chemically cleaned with an inhibited acid solution toremove weld spatter, rust, scale, etc.Mechanical cleaning methods shall be used in addition to chemicalcleaning to achieve the above described results.

2. Stainless steel shall be mechanically cleaned at welds so all foreignmaterial is removed.

(3.5.2.4) Materials for sealflushing liquid coolers shall be per the following:COOLING MEDIA TUBE COIL CASING (OR SHELL)

Fresh Water Type 316 Stainless Steelor Monel

Carbon Steel

Salt Water Monel Carbon SteelAir Type 316 Stainless Steel

with Aluminum orStainless Steel Fins



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Cooling water shall be on the casing side. Minimum tube wall thickness shall be1,24 mm (0,049 inch).

17.2.10 Proposal Dataa. (5.1.a) Sellers filledout proposal data sheet shall show wear ring

clearances and diameters of proposed pumps for pumping temperature 260C (500 F) or higher.

b. (5.1.f) Seller shall submit cooler design details.c. (5.1.h) For pumps rated over 375 KW (500 HP), Sellers proposal shall

include proof of compliance with par. 1.2.d. (5.1.h) If high temperature mechanical seals are proposed, per par.

(2.7.1.11), Seller shall submit an installation list demonstrating satisfactoryexperience.

17.3 SubstitutionsAdd to the following Requirements those, in the set of requirements given formedium duty centrifugal pumps.

17.3.1 Performancea. (2.1.2) Pumps handling cold liquids, at 45 C (112 F) or lower, shall be

vertical pumps or submerged pumps. Vertical pumps shall have a vaporspace with a heat dam and seal oil drip catching device with drain betweenthe mechanical seal and the pumped liquid.

17.3.2 Casinga. (2.2.3) Areas of multistage horizontal and double case pumps which are

normally subjected to suction pressure shall be designed to permit, as aminimum, a hydrostatic test pressure equal to the maximum casingdischarge pressure.

b. (2.2.7) Casings of inline pumps shall be split perpendicular to the shaft andshall not require the rigid support of a foundation. The design of inlinepumps shall permit removal of the rotor without disconnecting the mainpiping. Casing joint gaskets for pumping temperatures above 315 C (600F) shall be metaljacketed and shall be confined at the vertical split.

17.3.3 Nozzles and Connectionsa. (2.3.2.9) Flange connections shall be designed for through bolting.

17.3.4 Wear Ringsa. (2.6.1) Casings shall be fitted with renewable wearing rings.



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17.3.5 Mechanical Sealsa. (2.7.1.10) If cooling is required to maintain the mechanical seal within its

temperature limitations, the pump Seller shall provide water cooled stuffingboxes or a cooler to cool flushing fluid from the pump discharge.

17.3.6 Dynamicsa. (2.8.4.7), (2.8.4.8) & (2.8.4.9) The peaktopeak amplitude of vibration

during shop test and field operation shall not exceed the following values:

PEAKTOPEAK AMPLITUDE (Unfiltered)MAXIMUM

rev/minSPEED

rev/sANTIFRICTION

milsBEARINGS (1)

mmSLEEVE

milsBEARINGS

(2)(3)(4)mm

5000 83 2.5 0.06 2.0 0.05

5000 to20000

83 to335

10000Shaft Speed Rev

min

167Shaft Speed Revs

20000 335 0.5 0.013

Notes:1. Measured on bearing housing.2. Measured on shaft (adjacent to the bearing) and includes runout.3. If vibration cannot be measured on the shaft, vibration shall be measured on

the bearing housing and these same limits apply.4. For vertical pumps without antifriction bearings, these same limits apply as

measured on the lower bearing housing of the driver and on the driver adapterframe.

17.3.7 Bearingsa. (2.9.2.5) Cooling coils shall be inhibited admiralty brass. Pipe connections

inside the bearing housing are prohibited.17.3.8 Mounting Plates

a. (3.3.1.8) Baseplate grouting holes shall be accessible without removing themachinery and shall permit filling of the entire cavity under the baseplatewithout trapping air pockets.

b. (3.3.1.13) Pedestal cooling shall not be provided.17.3.9 Piping and Appurtenances

a. (3.5.1.2) When auxiliary piping is common to both pump and driver, theOwner will specify the extend of piping to be supplied by each Seller.



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17.3.10 Hydrostatic Testa. (4.3.2.1) Suction sections of multistage horizontal and doublecase pumps

shall have a hydrostatic test pressure equal to maximum casing dischargepressure.

b. (4.3.2.1.b) Mechanical seal flushing liquid coolers shall be hydrostaticallytested to the same pressure as the pump casing.

Men PrincipalIndice ManualIndice Volumen

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