0700.2 - non-api centrifugal pumps

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Polaris Engineering Standard 700.2 Rev.: 2 Page: 1 of 30 Date: 07/08/02 NON-API CENTRIFUGAL PUMPS TABLE OF CONTENTS PAGE I. SCOPE 2 II. REFERENCES 3 III. GENERAL REQUIREMENTS 4 IV. BASIC DESIGN 5 A. General 5 B. Pressure Casings 7 C. Nozzles and Miscellaneous Connections 7 D. External Nozzle Forces and Moments 8 E. Rotating Elements 9 F. Seals 10 G. Bearings and Bearing Housings 13 H. Materials 14 I. Nameplate and Rotation Arrows 16 J. Lockout Device 16 V. ACCESSORIES 17 A. Drivers 17 B. Couplings and Guards 18 C. Mounting Plates) 19 D. Instrumentation) 21 E. Piping and Appurtenances) 21 VI. INSPECTION, TESTING AND PREPARATION FOR SHIPMENT 23 A. General 23 B. Inspection 23 C. Testing 23 D. Preparation for Shipment 25 VII. VENDOR’S DATA 26 A. Proposals 26 B. Contract Data 27 VIII. GUARANTEE AND WARRANTY 30

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Page 1: 0700.2 - Non-API Centrifugal Pumps

Polaris Engineering

Standard

700.2 Rev.: 2 Page: 1 of 30 Date: 07/08/02

NON-API CENTRIFUGAL PUMPS

TABLE OF CONTENTS PAGE I. SCOPE 2 II. REFERENCES 3 III. GENERAL REQUIREMENTS 4 IV. BASIC DESIGN 5

A. General 5 B. Pressure Casings 7 C. Nozzles and Miscellaneous Connections 7 D. External Nozzle Forces and Moments 8 E. Rotating Elements 9 F. Seals 10 G. Bearings and Bearing Housings 13 H. Materials 14 I. Nameplate and Rotation Arrows 16 J. Lockout Device 16

V. ACCESSORIES 17

A. Drivers 17 B. Couplings and Guards 18 C. Mounting Plates) 19 D. Instrumentation) 21 E. Piping and Appurtenances) 21

VI. INSPECTION, TESTING AND PREPARATION FOR SHIPMENT 23 A. General 23 B. Inspection 23 C. Testing 23 D. Preparation for Shipment 25 VII. VENDOR’S DATA 26 A. Proposals 26 B. Contract Data 27 VIII. GUARANTEE AND WARRANTY 30

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NON-API CENTRIFUGAL PUMPS

I. SCOPE

A. This Standard covers the minimum requirements for centrifugal pumps used in general non-critical plant services, including water, boiler feedwater, condensate, caustic, chemicals, solutions, etc.

Where conflicts exist between this Engineering Standard and other Polaris

Engineering Standards and/or applicable codes or regulations, the more stringent requirement shall govern. All conflicts shall be brought to the client’s and/or Polaris’ attention for resolution. Client shall be the sole arbiter of any conflicts.

B. The requirements of this Standard shall apply to all general service centrifugal

pumps not covered by Polaris Engineering Standard 700.1, API Centrifugal Pumps. The Purchaser will determine, with the client’s and/or Polaris’ approval, which pump services may be covered by this Standard in lieu of the more stringent Standard 700.1 requirements. Pumps exceeding any or all of the following maximum application limits or criteria shall be covered by Standard 700.1 unless approved by client.

1. 275 psig discharge pressure 2. 75 psig suction pressure 3. 400 feet rated differential head 4. 300°F pumpage temperature 5. 3600 rpm rated speed

6. Where more than one stage is required 7. In hydrocarbon services C. Compliance by the Vendor with the provisions of this Standard does not relieve

the Vendor of the responsibility of furnishing equipment of proper design and mechanically suited to meet operating guarantees at the specified service conditions.

D. The proposal shall include a specific statement that the equipment is in strict

accordance with this Standard. If not in strict accordance, a specific list of exceptions with descriptions of the proposed substitutes shall be included. Unless specific exception is recorded under the heading "Exceptions" in the Vendor's proposal, it shall be mutually understood that the proposal is based on equipment, which complies strictly with the requirements of this Standard.

E. The Vendor may offer his standard design as an alternate, provided the alternate

design covers a construction which is suitable for and guaranteed to meet the operating conditions specified and all deviations from this Standard are listed in the Vendor's proposal.

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F. Vendor shall be responsible to ensure that all technical and data requirements of

this Standard are followed by his Subcontractors. II. REFERENCES

This Polaris Standard is to be used in conjunction with the latest revision of the standards and codes listed below, unless specifically noted. The terminology "latest revision" shall be interpreted as the revision in effect at the time of contract award. This Polaris Standard may reference specific sections of some of these codes and standards. The revision of the codes and standards being referenced is noted below in parenthesis. This information is provided to identify the subject matter being referenced. Changes or exceptions made to the referenced code or standard shall apply to later revisions as applicable.

A. American Society of Mechanical Engineers (ASME) Standards

1. B16.5 Pipe Flanges And Flanged Fittings NPS 1/2 Through NPS

24 (1998) 2. B16.11 Forged Fittings, Socket-Welding And Threaded (1996) 3. B31.3 Process Piping (2001) 4. B73.1M Specification for Horizontal End Suction Centrifugal

Pumps for Chemical Process (1991)

5. B73.2M Specification for Vertical Inline Centrifugal Pumps for Chemical Process (1991)

6. ASME Boiler and Pressure Vessel Code (2001)

B. Occupational Safety and Health Administration (OSHA) Standards 29 Code of Federal Regulations, Part 1910.

C. National Fire Protection Association (NFPA)

70 National Electrical Code (2002)

D. National Association of Corrosion Engineers (NACE) Standard

MR0175 Sulfide Stress Corrosion Cracking Resistant Metallic Material for Oil Field Equipment (2001)

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E. American Petroleum Institute (API) Standards

1. 611 General Purpose Steam Turbines for Petroleum, Chemical, and Gas Industry Services (4th Edition, 1997)

2. 677 General-purpose Gear Units for Petroleum, Chemical and Gas

Industry Services (2nd Edition, 1997) F. Local, state or national codes

G. The following referenced Polaris Engineering Standards are to be used with this

Standard, as applicable:

1. 140.10 General Welding, Fabrication and Inspection 2. 150.1 Equipment Purchases – General Engineering Requirements 3. 160.1 Noise Levels 4. 710.1.1 Pump Seal Pot Standard 5. 770.1 General Purpose Steam Turbines 6. 790.2 General Purpose Gears 7. 920.1 Temperature Instruments 8. 925.1 Pressure Instruments 9. 1050.1 Induction Motors 10. 1400.1 Painting – Process Equipment and Piping

III. GENERAL REQUIREMENTS

A. Pumps covered by this Standard shall be designed, fabricated, inspected, tested and shipped in accordance with ASME Standard B73.1M for horizontal pump types or B73.2M for vertical inline types except as modified in this Standard and individual data sheets listing specific operating conditions, driver data and special requirements. The order of precedence is:

1. Inquiry or purchase order special instructions 2. Data Sheets 3. This Standard 4. ASME Standard B73.1M or B73.2M 5. Other referenced standards, codes and specifications

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B. Standardized external dimensions covered by ASME Standard B73.1M and

B73.2M are not specifically required by this Standard for non-ASME dimensioned pumps. The intent of this Standard is to expand the scope of the ASME Standards with additional requirements for both ASME and non-ASME dimensioned pumps.

C. The pump-driver unit must comply with the latest revisions to the Occupational

Safety and Health Act and all local state and national codes. Where conflict occurs, the applicability of local, state and national codes, regulations, ordinances or rules shall be mutually agreed upon by the Purchaser and Vendor.

IV. BASIC DESIGN

A. General 1. All pumps shall be suitable for continuous duty. Pump models furnished

shall be identical or similar to other pumps, which the Vendor regularly produces.

2. Unless specified otherwise, the complete unit shall be purchased from the

Vendor, who shall be fully responsible for engineering coordination and performance including: guarantees, warranties, driver size, RPM, direction of rotation, all necessary analyses including start-up torque and lube oil system. The Vendor shall be responsible for obtaining and submitting to the Purchaser all required drawings and engineering data for all parts of the complete unit and coordinating all tests.

3. Operating conditions specified on the data sheets are at the suction and

discharge nozzles. Vendor shall indicate the minimum continuous stable flow on the data sheet to prevent overheating, cavitation, and excessive vibration. When the lowest specified operating capacity falls below the minimum continuous stable flow required by the selected pump, the Vendor shall indicate the need for a minimum flow bypass and adjust the rated capacity to include the minimum flow.

4. Pumps with constant speed drivers shall be capable of at least a 10% head

increase at rated conditions by installing larger diameter or different impellers. Low flow-high head single stage diffuser type pumps can obtain the required increase in head by changing diffuser diameters or by changing speeds via a gear ratio increase. Maximum and minimum impeller diameters shall be avoided when possible.

5. Turbine-drive pumps shall be designed to operate continuously at 105% of

rated speed and to operate briefly, under emergency conditions, at up to 120% of rated speed (turbine overspeed trip setting).

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6. The Vendor shall specify on the data sheets the NPSH required when the

pump is operated on water at a temperature of less than 150°F at the rated capacity and rated speed. A hydrocarbon reduction or correction factor shall not be applied. If the NPSHR, as quoted, has a datum elevation different from defined in the Hydraulic Institute Standards, Vendor shall so state in the proposal.

7. Pumps that handle liquids more viscous than water shall have their water

performance corrected in accordance with the Hydraulic Institute Standards. Viscous correction factors shall be noted on the performance curves if standard catalog curves based on water performance are included with the proposal. Curves redrawn in their entirety for viscous correction, shall also be accompanied by their corresponding water performance curves with correction factors noted.

8. Pumps shall have the characteristic of a continuously rising head curve

with maximum head at shutoff. Head rise to shutoff shall not exceed 25% of the head at rated capacity. The pump shall be capable of continuous operation from the rated point to maximum capacity for the rated impeller diameter furnished. When parallel operation is specified, the head rise shall preferably be 10 to 20% of the head at rated capacity.

9. The best efficiency point for the furnished impeller diameter shall

preferably be between the rated point and the normal point if both capacities are noted on the data sheets. Normal flow shall not be greater than the best efficiency point flow for the rated impeller diameter.

10. The noise level of the unit at the rated speed shall be in accordance with

Polaris Engineering Standard 160.1. If the noise level is above the allowable, Vendor shall propose acoustical treatment necessary to reduce noise in acceptable levels.

11. Purchaser will specify desired piping schematic from ASME Standard

Figure A3. When Purchaser fails to note cooling or heating requirements desired, Vendor shall make recommendations. Unless otherwise specified, cooling shall be with 75 psig, 110°F tempered water. Heating fluid to prevent pumpage solidification or crystallization will be specified by the Purchaser.

12. Motors, electrical components and electrical installations shall be suitable

for the area classification and shall meet the requirements of NFPA Bulletin 70, Articles 500 and 501, as well as any local codes specified by the Purchaser. The Electrical Area Classification shall be Class I, Group C & D, Division 2, unless specified otherwise on the data sheets.

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13. The pump-driver unit, including auxiliary equipment, shall be furnished as

a complete operating unit suitable for continuous duty in an unsheltered outdoor installation, unless noted otherwise on the data sheets.

14. Pump type and construction will normally be specified on the data sheets

by the Purchaser when such preference is known. Vendor may offer alternate designs if strict compliance with the specified type and construction would cause the Vendor to either no bid or bid a technically poor selection.

15. Horizontal and vertical inline units shall be shipped with drivers mounted

and accessory piping installed wherever practical. 16. All horizontal and vertical inline pumps shall be separately coupled to the

drivers. Mounting of pump impellers onto motor shafts requires the client and/or Polaris approval.

B. Pressure Castings

1. The pressure casing shall be designed, as a minimum, for the maximum

discharge pressure (equal to maximum suction pressure plus maximum shutoff differential pressure when using the maximum impeller diameter at maximum continuous speed) at the maximum pumping temperature. Minimum corrosion allowance shall be 1/8 inch.

2. The design pressure of the casing including seal chamber (stuffing box)

and gland shall be equal to or greater than the pressure-temperature rating of ASME B16.5 Class 150 flanges for the material used.

3. Asbestos or asbestos containing materials shall be strictly prohibited.

C. Nozzles and Miscellaneous Connections

1. Suction and discharge nozzles shall be flanged and shall be of equal

rating. Suction and discharge nozzles 2 inch and smaller shall be 300 lb minimum. Preferred minimum flange rating is 300 lb for nozzles larger than 2 inch.

2. All through-bolt casing flanges shall be full or spot faced on the back. All

flanges, other than cast iron, shall be raised face unless specified otherwise.

3. To withstand vibration, auxiliary connections shall be at least 1/2 inch

NPS on the pressure casing, seal chamber (stuffing box) and seal gland plate.

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4. For nonflammable and nonhazardous pumpage, auxiliary connections may

be threaded. For flammable or hazardous pumpage, all auxiliary connections to the pressure casing shall be socket welded except threaded connections will still be permitted at the seal gland plate. Purchaser’s field connections shall terminate in a flange or a valve. All casing connection flanges 2 inch NPS and smaller shall be flanged with a 300 lb. minimum rating. Slip-on flanges are strictly prohibited.

5. Pipe nipples should not be more than 6 inches in length and shall be a

minimum of Schedule 160 seamless for sizes 1 inch and smaller at all socket welded or threaded auxiliary connections on the pressure casing, seal chamber (stuffing box ) and seal gland plate.

6. Tapped openings not connected to piping shall be plugged with round

head plugs furnished in accordance with the dimensional requirements of ASME B16.11. Threads shall be lubricated. Plastic plugs are not permitted.

7. All machined and studded connections on the casing that are 2 inch and

smaller shall conform to the facing and drilling requirements of ASME 300 lb. minimum rated mating flanges.

8. Casing vent and drain connections shall be required unless the specified

corrosion allowance exceeds 1/8 inch or the pump is in erosive service. If the connections are not drilled due to the above, bosses for future connections shall be provided instead. Self venting casing arrangements are preferred. All fluid passages within the pump including auxiliary piping shall be arranged for complete drainage.

9. Gauge connections shall not be provided.

10. Casing drains for horizontal and vertical inline pumps shall be socket

welded or threaded with pipe nipples in accordance with Paragraphs 4 and 5 above and terminated with 300# minimum socket welded flanges by the Vendor.

11. If not self venting, Vendor shall provide a 300# minimum flanged vent

connection socket welded or threaded to the casing with a pipe nipple in accordance with Paragraphs 4 and 5 above for horizontal pumps.

D. External Nozzle Forces and Moments

Vendor shall submit with all proposals and again as certified data after purchase, maximum allowable external forces and moments on casing nozzles without adversely affecting the operation or life of the pump or driver.

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E. Rotating Elements

1. Impellers shall be one piece construction. Unless approved otherwise by

the Purchaser, all impellers shall be dynamically balanced regardless of the outside diameter to periphery width ratio noted in ASME B73.1M and B73.2M.

2. Shaft sleeves are required for pumps having mechanical seals or

conventional packing, except where sleeves are not economical to use due to small shaft size or bellows seal design. Shaft sleeves shall extend beyond the outer face of the packing gland or seal plate.

3. Shaft sleeves for mechanical seals shall be of single piece construction.

Sleeve nuts, if used, shall be threaded to tighten against the direction of normal rotation. Snap rings are not allowed as a substitute for sleeve nuts. The shaft sleeve (not sleeve nut only) must extend beyond the seal gland plate.

4. If seal sleeves are omitted, the shaft material shall be 12% chrome steel or

18Cr-8Ni as a minimum. Shaft sleeves shall be required on all pumps having impellers mounted on extended motor shafts.

5. Except for cartridge seals, the shaft sleeve should preferably be secured

near the impeller end and shall accommodate any differential expansion. Shaft sleeve seal shall be inboard of any threads. For outside drive cartridge seals, the sleeve must be free to be located on the shaft regardless of the location of the rotating assembly. The inboard end of the sleeve must not touch the impeller or impeller lock nut.

6. For the primary and secondary rotating elements of single, tandem or

double seal arrangements which require a specific axial position for installation; an adequate shoulder, step or seal drive pins shall be provided on the shaft sleeve (or shaft if sleeve is omitted) to insure proper assembly. Scribe lines may be used if the above methods are prohibited by dimensional restraints. Separately mounted pumping rings shall also be positively located axially per one of the above methods. The above requirements also apply to outside drive cartridge seals.

7. When pusher type seals using Teflon secondary seals are specified, shaft

sleeves shall be hard-faced with Colmonoy or approved equal in the area contacted by the sliding gasket to prevent wear and fretting.

8. Wear rings are required for pumps with fully enclosed type impellers.

Both casing and impeller wear rings are preferred. A casing wear ring is required as a minimum. Wear rings shall be renewable.

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9. For pumps with axial split casings, casing wear rings shall be preferably

held in place by a torque fitted into the groove in the casing. Positive locking anti-rotation pins are also acceptable.

10. Renewable wear rings held in place by press fit without pinning or tack-

welding are acceptable. Renewable wear rings held in place by screwing against rotation are prohibited. Threaded locking devices shall not be used and are acceptable only where no other locking means are feasible. If threaded locking devices are used they shall be fully described in the proposal for review and approval of the Purchaser.

F. Seals Mechanical Shaft Seals

1. Mechanical seals shall comply with the requirements of both the data sheets and this Standard. In the case of conflict between documents regarding a specific requirement, the data sheets shall govern over this Standard.

2. Unless specified otherwise, seals shall be the single, hydraulic balanced,

internal type. Unbalanced seals and other special configurations may be recommended by the Vendor, when required for the service, as an alternate to the Purchaser’s specifications. Built-in seals will not be considered. Pump seals shall be of a type with removable seal gland plate.

3. All seal materials shall be suitable for the maximum specified pumping

temperature regardless of the flush temperature or seal chamber temperature due cooling.

4. The radial clearance between the rotating member of the seal and the bore

of the seal chamber shall be 1/8 inch minimum.

5. Stationary mechanical seal faces shall be “0” ring mounted with a radial pin to prevent face rotation. A clamped seal face using a gasket may be proposed as an alternate, interference press fit (gasketed or nongasketed) stationary faces are not permitted.

6. The piping connections for seal flush shall be to the gland plate.

Connections of ½ inch NPT size are preferred.

7. Flushing connections for vertical pumps shall be made at the seal gland plate to eliminate vapor pockets in the seal chamber.

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8. Horizontal pump seal chamber jackets or inserts shall be provided for the

conditions and services noted below, regardless of piping plan specified by the Purchaser:

a. Boiler feed water pumping temperatures above 160°F. b. Dead-end seal arrangements. Cooling jacket passages shall not open into the casing joints. 9. Seal chamber (stuffing box) throat bushings shall be provided when

necessary to:

a. Increase or decrease seal chamber pressure.

b. Isolate seal chamber fluid.

c. Control flow into or out of seal chamber.

10. A nonsparking throttle bushing, installed in the seal gland plate and positively retained against pressure blowout, shall be provided for all services to allow control of minor leakage and to minimize leakage if the seal fails. Fixed type throttle bushings shall be required for tandem seal arrangements, unless prohibited by dimensional restraints. Close clearance floating type carbon throttle bushings shall be required for all single seal arrangements in hazardous or environmentally sensitive services such as all hydrocarbons, sour water, caustic and most chemical solutions.

11. Tandem or double mechanical seals shall be provided when specified on

the data sheet. When Plan 7352 or 7353 piping is furnished for tandem or double seals, a pumping ring shall be provided to circulate the barrier fluid. The reservoir outlet connection shall be elevated at least 6 to 12 inches above the pump shaft centerline. The optional pressure switch shall also be required. Pressure switches and gauges shall include block and bleed valves.

Plan 7352 and 7353 auxiliary fluid reservoirs shall be furnished per

Polaris Pump Seal Pot Standard 710.1.1. Reservoirs shall include a weld pad reflex type level gauge. Unless specified otherwise, reservoir shall be bolted via a bracket to a vertical steel column and foundation soleplate of substantial lateral stiffness to be provided with the reservoir.

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a) Barrier fluid seal pots shall be provided with a flanged fill

connection.

b) A synthetic barrier fluid shall be used for applications above 250 F.

c) Piping for barrier fluid lines to and from seal pots shall be ¾” SS tubing.

12. O-ring type seal gland plate gaskets are preferred when the mechanical seals utilize elastomeric secondary gaskets. Asbestos or asbestos filled gaskets shall be strictly prohibited.

Stuffing Boxes For Packing 13. Pump packing where required shall be specified by the Purchaser and

furnished by the Vendor.

14. Pump data sheet will specify if cooling or flushing medium is to be provided to the seal cage. Inlet and outlet connections will not be drilled unless required.

Packed stuffing boxes shall be flushed at the throat bushing if the liquid

contains abrasive particles such as catalyst or coke in concentrations of 0.1 pound/gallon or more, or fails to provide the required lubrication for the packing.

Sealing liquid at a positive pressure shall be injected into the seal cage of a

packed stuffing box operating at vacuum pressure.

15. Packing glands for all services shall be split type, non-sparking or furnished with non-sparking bushings.

16. The type of packing shall be selected by the Vendor, unless specified on

the data sheet, and shall be suitable for the specified conditions of service. Two sets of packing shall be furnished with the pump and packaged separately for installation in the field. The pump shall be shipped without packing installed. Asbestos in any form is prohibited.

17. Pressure on the stuffing box shall be the minimum required for

satisfactory operation. Pumps shall be designed to provide positive pressure on the stuffing box. Stuffing box throat bushings are to be of a design which will not blow out if the packing gland is loosened while the pump is under pressure, nor be pushed inward when the packing gland is pulled up.

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G. Bearings and Bearing Housings

1. When required by the Vendor or specified by the Purchaser, ball type

thrust bearings shall be of the duplex, single row, 40° angular contact type (7000 series), installed back to back (DB).

Thrust bearings shall be sized to allow circulation of water at reduced capacities at rated speed for short durations of time during commissioning and startup activities.

2. Bearings for horizontal pumps shall be oil lubricated and equipped with constant level oilers. Bearing housings shall be adequately sealed to prevent the entrance of foreign matter into the housing with the use of magnetic or labryinth type shaft oil seals. Elastomeric lip seals are not acceptable. A steel drain plug shall be provided at the bottom of each bearing housing. Constant level oilers shall be Trico or equal.

3. Bearings and bearing housings shall have provisions for future oil mist

lubrication. The data sheet shall indicate if oil mist lubrication will be used at the time of initial installation.

4. Bearing housings shall be provided with cooling jackets (or cooling coils)

and piping where pumping temperatures are above 300°F and for services where heavy thrust loads are anticipated, if recommended by the Vendor.

5. Grease lubrication is acceptable only if the Vendor’s standard design will

not accommodate oil lubrication. Lubrication of vertical inline pumps with separate bearing housings (Type “VB”) may be grease if not specified otherwise by the Purchaser. Greased bearings shall be regreasable in operation. Grease fittings shall be stainless steel pressure type with fittings for filling while operating and a visible discharge port for observing the displaced used grease. Permanently greased bearings shall be provided only when approved by the client and/or Polaris.

6. The following maximum allowable vibration levels during any shop

testing and after field installation onto a grouted foundation supersedes the level noted in ASME Standards B73.1M/B73.2M Paragraph 5.1.4. Bearing housing vibration at rated speed and within 10% of rated capacity shall not exceed the following peak velocity values:

Anti-friction Bearing Housings a. 0.15 inches per second, peak, unfiltered b. 0.10 inches per second, peak, filtered

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Sleeve Bearing Housings

a. 0.10 inches per second, peak, unfiltered b. 0.07 inches per second, peak, filtered

Filtered vibration shall be measured at running speed frequency and all

blade-passing frequencies.

H. Materials

1. Materials for critical pump parts shall be specified on the data sheet. Deviation from specified materials will not be permitted without specific approval. This does not relieve Vendor of responsibility of recommending materials on the basis of successful past experience. Materials not specified shall be Vendor’s standard for the specified operating conditions. As an alternate, Vendor may quote standard materials of equal or higher quality.

2. In most instances, gray cast iron pressure casing parts are strictly

prohibited regardless of pump service due to installation in plant areas that may be subject to fire hazards. When steel or alloy casings are not available, nodular (ductile) iron may be proposed for the client’s and/or Polaris’ approval). Cast nodular iron, ASTM A395, is the only member of the cast iron family of materials that may be considered for pressure casings when handling flammable or hazardous pumpage.

3. Castings shall be sound and free from porosity, hot tears, shrink holes,

blowholes, cracks, scale, blisters and similar injurious defects.

4. The use of chaplets shall be held to a minimum. The chaplets shall be clean and corrosion free and of a composition compatible with the casting. Chaplets in casings other than cast iron not completely fused into pressure castings, or other defects, shall be replaced by weld metal equivalent to the casing composition. Casings shall be heat-treated following any major repairs. PWHT shall be in accordance with the requirements of Polaris Engineering Standard 140.10.

5. Pressure containing, wetted ferrous castings shall not be repaired by

plugging, peening, burning in, or impregnating. Iron shall not be repaired by welding or brazing. The Vendor shall notify the Purchaser of all weld repairs on steel or stainless steel parts. Casting repair procedures shall be submitted to the client and/or Polaris for approval.

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6. Weldable grades of steel and stainless steel castings may be repaired by

welding using a qualified welding procedure based on the requirements of Section VIII, Division I, and Section IX of the ASME Pressure Vessel Code and Polaris Engineering Standard 140.10. Removal of sufficient metal to eliminate the defect shall be verified by liquid penetrant or magnetic particle examination, as required, for welds. Casting repair procedures shall be submitted to the client and/or Polaris for approval.

7. Austenitic and duplex stainless steel casings may suffer material

movement during hydrostatic test. Residual stresses remaining after solution annealing may be released during any additional working of the material.

8. Welding of piping, pressure-containing parts, and wetted parts, as well as

any weld repairs to such parts, shall be performed and inspected by operators and procedures qualified in accordance with Section VIII, Division 1, and Section IX of the ASME Code and Polaris Engineering Standard 140.10.

9. The Vendor shall be responsible for the review of all repairs and repair

welds to ensure that they are properly heat treated and nondestructively examined for soundness and compliance with the applicable qualified procedures.

10. For flammable or hazardous services, all pressure casing socket welds

shall be examined by either magnetic particle or liquid penetrant procedures.

11. All welding on the casing shall be completed prior to heat treatment of the

casing.

12. For pumps with service temperatures below 32°F, the Purchaser and the Vendor shall agree on the need for impact testing to ensure that the impact strength of the materials used in construction of the pump pressure casing and rotor are adequate for the application. Impact testing and minimum Charpy V-notch impact energy levels shall be in accordance with Section VIII, Division 1, UG-84, of the ASME Code. Unless specified otherwise, the materials shall have minimum impact value of 15 ft-lbs. at the minimum service temperature.

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I. Nameplate and Rotation Arrows

1. In addition to the requirements of ASME B73.1M/B73.2M, nameplate

shall also include the following data:

a. Purchaser’s item number. b. Purchase order number. c. Specific gravity of liquid to be pumped at flowing conditions. d. Capacity in gpm. e. Head, in feet. f. Speed, in rpm. g. Bearing identity numbers.

2. Rotation arrows may be cast in or shall be AISI Type 300 series corrosion

resistant stainless steel or Monel attached with corrosion resistant pins to the casing.

3. All nameplate data shall be in US customary units. J. Lockout Device

A lockable type energy isolating device shall be provided for all machinery, equipment and systems for the purpose of shutting off and disabling the machinery, equipment and systems whenever maintenance or servicing is performed. The isolating device shall prevent unexpected energization, startup or release of stored energy from the equipment or process and as a minimum shall:

1. Disconnect all electrical energy sources. 2. Dissipate or remove stored or residual energy sources such as capacitors,

springs, flywheels, elevated weights, hydraulic systems, air, gas, steam, water or other pressure sources, and any chemical, nuclear and thermal reactions.

3. Disconnect all control instruments, programmable controllers, process

computers or other devices, which may bypass or override an isolation device.

4. Provide a lockable device for individual locks and tags.

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V. ACCESSORIES

A. Drivers

1. All drivers will be mill and chemical (severe duty), squirrel-cage induction electric motors supplied and mounted by Vendor in accordance with Polaris Engineering Standard 1050.1, unless noted otherwise on the data sheets. Pump BHP shall also include losses for integral gears and shaft driven lube oil pumps, when such devices are used.

2. Vendor shall be cautioned to adequately size drivers in low horsepower

services where starting torque requirements are increased due to high suction pressures or multiple seal arrangements.

3. Motor drives shall have power ratings, excluding the service factor (if

any), at least equal to the percentages of power at pump rated conditions given as follows. Notwithstanding these requirements, all motors shall be large enough, without taking credit for the service factor, to drive the pump throughout the full head-capacity range of the rated impeller diameter. Motors shall be supplied with service factors in accordance with the requirements of Polaris Engineering Standard 1050.1.

MOTOR NAMEPLATE RATING PERCENTAGE OF PUMP RATED BHP

25 HP and less 125 30 HP to 75 HP 115 100 HP and above 110

4. Unless specified otherwise, expected voltage drop at the motor terminals,

upon starting, shall be 20% of specified normal voltage. 5. Vendor shall supply, shop mount, align, and be responsible for all vertical

drive components. All vertical drive components shall be fitted to the pump in the shop, aligned, and matchmarked prior to being shipped.

6. Vertical motor drivers shall have thrust bearing capacity adequate for

maximum pump thrust under any operating conditions. Vendor shall advise vertical pump driver thrust load rating based on a minimum L10 bearing rating life of 25,000 hours in the proposal.

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7. Steam turbines shall be in accordance with API Standard 611 as supple-

mented by Polaris Engineering Standard 770.1 and Polaris data sheets. Turbines shall be rated to deliver continuously 110% of the pump rated power and corresponding speed. The steam turbine horsepower rating shall be based on the minimum inlet and maximum exhaust steam conditions specified. Turbines shall be provided with a locally digital speed indicator, Dynalco Model SPD-700 or equal.

8. When required, speed increasing or decreasing gears shall be in

accordance with either API Standard 677 as supplemented by Polaris Engineering Standard 790.2. For electric moor drivers, gear rated power shall be the motor nameplate rating multiplied by the motor service factor. Minimum API gear service factor shall be 1.5.

9. Horizontal drivers that are mounted at the Vendor's shop shall be doweled

at the jobsite. For vertical pumps, the Vendor shall mount the driver to the pump in its shop to ensure proper unit fit-up, shaft mating. Vertical inline Type “VC” pumps shall have a rabbet fit between the driver and pump mounting flanges. Dowelling in Vendor's shop shall be required for vertical pumps furnished without rabbet fits between pump and driver.

B. Couplings and Guards

1. Spacer type couplings shall be furnished for horizontal pumps and where

necessary on other pump designs to permit pump maintenance or seal removal without removing the pump or driver from its mounting.

2. Unless otherwise approved by the client and/or Polaris, couplings shall be

flexible disk type with piloted hubs and center member. Coupling design shall also include a floating piloted spacer arrangement that will retain the spacer if a flexible element ruptures. Disks (shims) and bolting shall be stainless steel. Hubs and other metal parts shall be steel with corrosion resistant plating. A service factor of at least 1.5 shall be applied to flexible element couplings.

3. Unless specified otherwise, dynamically balanced couplings shall be

furnished when:

a. Rated speed exceeds 3400 RPM, or

b. The pump or driving shaft diameter is 3-1/2 inches or greater, or

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b. The coupling supplier may recommend dynamic balancing based

on coupling sizes or speeds less than noted above.

Dynamic balancing shall comply with AGMA Standard 515 Balance Class 9 as a minimum.

4. For field mounted drivers, the Pump Manufacturer shall finish boring the

driver half coupling to dimensions shown on the certified driver drawing and ship it with the pump to the field for mounting.

5. Removable coupling guards shall be furnished for all pumps, horizontal or

vertical. Guards shall be sufficiently rigid in design to avoid contact with the coupling or shaft as a result of bodily contact. Guards shall meet OSHA requirements. Guards shall be fabricated from non-sparking materials. However, guards may be steel for vertical pumps if the guard is mounted to the exterior surface of the driver pedestal to cover the pedestal openings. Aluminum or fiberglass coupling guards are preferred subject to meeting OSHA requirements. Aluminum guards shall be electrically insulated from steel frames to prevent formation of a galvanic cell.

C. Mounting Plates

1. Baseplates shall be one piece, fabricated steel with a drain rim or drain pan

covering its entire length. The rim or pan of the baseplate shall be sloped at least 1:120 toward the pump end where a drain opening at least 1 inch NPT in size shall be located to effect complete drainage,

2. The baseplate shall be extended (length and width) such that the pump,

driver and all accessories do not overhang the baseplate perimeter. The motor driver conduit boxes may extend beyond the baseplate. The baseplate shall be sufficiently rigid to allow shipment with the driver mounted.

3. Mounting pads on the baseplate shall be provided for the pump and all

driver components. The pads shall be fully machined flat and parallel. All driver mounting pads shall be of the pedestal or box type. Pipe columns with rails or plates for driver mounting are not acceptable. Mounting pads for gear boxes shall be in the same plane, flat and level within 0.002 inch maximum overall.

4. All mounting pads shall be machined to allow for the installation of

stainless steel shims either 1/8 inch or 1/4 inch thick under each component. The Vendor shall provide the shims for both shop and field mounted drivers. When the Vendor does not mount the driver, the driver pads shall be machined by not drilled. All shims shall straddle mounting pad bolts. Step shims or tapered shims shall not be allowed under gearboxes.

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5. Baseplate and pump supports shall be constructed to minimize misalignment caused by mechanical forces. The underside of the fabricated baseplate shall be reinforced by cross members located under the pump and driver support. Exterior welding shall be continuous for all baseplate components. Crevices created by skip or stitch welding of components that are exposed to the exterior (non-grouted) environment are not acceptable.

6. All baseplates shall be provided with at least one grouting opening having

a clear area of no less than 19 square inches and no dimension less than 3 inches in each bulkhead section. These holes shall be located to permit filling the entire cavity under the baseplate without creating air pockets. Vent holes (1/2-inch minimum size) shall be provided for each bulkhead compartment. For dropped center-trough baseplates, the holes shall be in the high section adjacent to the trough. Holes shall be accessible for grouting with the pump and driver installed. Grout holes in the drip-pan area shall have 1/2-inch raised-lip edges, and if located in an area where liquids could impinge, metallic grout hole covers (16 gauge minimum thickness) shall be provided.

7. Longitudinal and transverse alignment positioning screws shall be

provided on the baseplates for all motor drivers exceeding 10 HP and all speed changing gears and all steam turbine drivers regardless of size. The jackscrew bases (lugs) shall be removable to prevent interference with shimming requirements.

8. Vertical leveling screws spaced for stability shall be provided on the

outside perimeter of all baseplates when the:

a. Rated driver BHP exceeds 200, or

b. Total weight exceeds 5000 lb., or

c. Common baseplate includes three or more components. Screws shall be located at each anchor bolt location as a minimum.

9. Vendor shall be required to shop mount all horizontal drivers on the baseplate for shipping under most circumstances. In special cases when the driver is to be mounted by others, the Vendor shall supply the driver hold-down bolts and shims.

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D. Instrumentation

1. Temperature gauges shall be bimetallic dial type. Glass mercury

thermometers are not acceptable. Gauges shall also comply with Polaris Engineering Standard 920.1, Temperature Instruments.

2. Pressure gauges shall be liquid filled. All pressure gauges shall have

block and bleed valves. Pressure gauges shall comply with Polaris Engineering Standard 925.1, Pressure Instruments.

3. Pressure switches shall be of NEMA 7 explosion proof construction for

the specified electrical area classification. Switch set point shall be field adjustable. Contacts shall be either SPDT or DPDT. All pressure switches shall have block and bleed valves.

E. Piping and Appurtenances

General

1. When tubing is permitted or specified by the Purchaser, minimum required materials shall be ASTM A269 Type 316 seamless stainless steel for tubing and tube fittings shall be stainless steel compression type by Swagelok. Armored TFE resin tubing (hose) is not acceptable.

2. Piping design, materials, joint fabrication, examination and inspection

shall be in accordance with ASME B31.3.

3. Valves with screwed or socket welded end connections shall be 800 lb minimum rating. Flanged valves 2 inch NPS and smaller shall have a minimum rating of 300 lb.

4. Bolted bonnet and gland valves shall be required and shall also be outside

screw and yoke (OS&Y) type. These valves shall be suitable for repackaging under pressure.

5. Cast iron, bronze or brass valves shall not be allowed in any service.

6. Flange gaskets for all services shall be Type 304 stainless steel, spiral

wound Flexitallic Type CG with graphoil filler.

7. All flanges 2 inch NPS and smaller shall have a minimum rating of 300 lb. Socket welding shall be limited to piping fabrications of 2 inches NPS and smaller. Slip-on flanges shall not be used.

8. Teflon tape joint sealant shall not be used.

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9. Plug material shall be solid steel for pumps with cast iron or steel casings

and of material equal to the parent metal for pumps with alloy steel casings. Plugs shall have a shank of at least 1-1/2 inches in length to permit the use of a pipe wrench.

Auxiliary Process Fluid Piping

10. Auxiliary process fluid piping includes vent and drain lines, balance lines, product flushing lines and lines for injection of external fluid.

11. Piping and tubing components shall have a pressure-temperature rating at

least equal to the design pressure and temperature of the pump casing. Flanges shall be rated no lower than the pump discharge flange rating.

12. When the pump casing is of alloy material, piping and components subject

to the process fluid (including seal flush plans 7351-7354) shall have corrosion/erosion resistance equal to or better than that of the casing. Otherwise, all piping shall be steel and all tubing shall be stainless steel.

13. Purchaser will specify either piping or tubing for the primary seal flush

plans 7311 through 7341. Unless specified otherwise, secondary seal flush plans 7351 through 7354 shall be tubing.

14. General piping fabrication shall be socket welded. Threaded connections

shall be avoided whenever possible. Threaded connections shall be seal welded except at seal gland plates and instruments.

15. Piping shall be seamless and Schedule 160 minimum for mechanical

strength. Preferred minimum size is ½ inch NPS. Pipefittings shall be forged Class 3000. Carbon steel shall be ASTM A106 for piping and A105 for fittings. Type 316 stainless steel shall be ASTM A312 for piping and A182 for fittings.

Cooling Water Piping

16. When cooling water plans are provided, the Vendor shall provide all accessories such as valves and sight flow indicators fully assembled and manifolded to single inlet and outlet connections per ASME B73.1M /B73.2M Figure A3.

17. Tubing shall be used in the cooling water circuit. Seal flush, stuffing box

and bearing housing cooling water piping shall be series flow. Tubing shall be 1/2-inch minimum size.

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VI. INSPECTION, TESTING AND PREPARATION FOR SHIPMENT

A. General

1. The Purchaser reserves the right to inspect the material and/or equipment prior to shipment. Such inspection shall not relieve the Vendor of his responsibilities to meet all requirements of the purchase order. It is further understood that it is the Purchaser’s privilege to waive inspection at point of manufacture without prejudice to their right to pass on acceptability of material to the point of destination. DO NOT SHIP UNLESS INSPECTION IS MADE OR WAIVED IN WRITING.

2. In cases where shop inspection of equipment or witnessing of tests is

waived, it shall not relieve the Vendor of conducting all tests called for in this Standard or purchase order.

B. Inspection

1. When the presence of amine or hydrogen sulfide is specified, Vendor shall

certify with appropriate documentation that the hardness and yield strength of parts, welds and heat affected zones are within allowable values of Rockwell C22 and 90, 000 psi. These limitations may be modified in accordance with NACE MR-01-75.

2. The Purchaser’s representative shall have access to the Vendor’s quality

assurance program for review. 3. All welding, fabrication and inspection shall be in accordance with the

requirements of Polaris Engineering Standard 140.10.

C. Testing

1. Acceptance of shop tests shall not constitute a waiver of requirements to meet field tests under specified operating conditions.

2. Mechanical seals and glands shall not be used during the hydrostatic test

but shall be used during all running or performance tests.

3. All welded attachments to casing, up to and including the first flange, shall be completed prior to hydrostatic testing and final machining of pressure casing.

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4. Equipment must be completely drained and dried after testing. Where

complete drainage is impossible, it is necessary to flush with chloride-free water, alcohol, petroleum distillate or suitable flushing solution. Hot air drying is not acceptable in lieu of flushing, but water can be blown out of pockets with air.

5. Hydrostatic tests shall be maintained for sufficient periods of time to

permit complete examination of parts under pressure. The hydrostatic test shall be considered satisfactory when neither leaks nor seepage through the casing or casing joint is observed for at least 30 minutes.

6. Austenitic or Duplex stainless steel pressure casing components may be

hydrostatically tested with an additional amount of material on areas where machining to critical dimensions and tolerances is required. The additional amount of material shall not exceed 0.040 inches material stock or 5% of minimum allowable wall thickness, whichever is less.

7. All pumps shall be performance tested. The pumps shall be operated (on

water) to obtain complete test data (5 points minimum) for head, capacity, efficiency, and brake horsepower from zero capacity to at least 120% of rated flow or 120% of best efficiency flow, whichever is greater.

8. When operated at rated speed and rated capacity, pumps shall test within

the following tolerances:

Rated differential head -0% to +5% Shutoff head -test/bid 90% to 110%

Rated power at tested head +42% Efficiency -1/2 point of efficiency

NPSH required +0 feet 9. Witnessing of the performance test shall be required if:

a. The manufacturing facility has no previous experience with the

pump; i.e., new size, new material or new product line; or

b. The Vendor has made significant changes to standard designs in critical areas such as hydraulic balance, shaft sealing, impeller patterns, etc.

10. Vendor shall ensure that seal damage will not occur during performance

testing on water when the contract seal faces are both hard faces such as tungsten carbide and silicon carbide.

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11. Pumps that exceed the capabilities of Vendor’s test stand regarding

capacity, BHP and speed, shall be tested under reduced conditions in a manner acceptable to the Purchaser.

12. Vibration shall be measured within 10% of rated flow and shall not exceed

the values stated in Paragraph IV. G. 6. Vibration shall also be measured and recorded at minimum continuous stable flow.

13. A retest of the performance shall be required if a reduction in impeller

diameter exceeds 5% of the diameter previously tested.

14. Any rotor, which required trimming of impellers, or any other adjustment shall be rebalanced following the same quality control procedure as used during initial assembly of the pump. Any filing, grinding or other reworking of impellers to meet the guaranteed performance shall be described in the test report or parts manual in sufficient detail to permit reordering new impellers similarly reworked.

15. NPSHR testing shall be required if NPSHR is within two feet NPSHA.

NSPHR tests shall be conducted on the first impeller made from a new pattern or an existing pattern that has been altered; i.e., changed from six to five vanes, altered vane angles, modified eye area, etc.

16. NPSH tests, when required, shall be conducted in accordance with the

Centrifugal Pump Test Code of the Hydraulic Institute Standards. NPSH data shall be taken at the following four points: Minimum continuous stable flow, midway between minimum and rated flows, rated flow and 110% of rated flow. A vacuum tank suppression test is preferred. NPSH testing by suction valve throttling may be used when mutually agreed upon. A 3% drop in head shall indicate performance impairment.

17. The Purchaser’s driver shall not be used during testing if there is any

possibility of serious overload.

D. Preparation for Shipment

1. Preparation for shipment shall be in accordance with Polaris Engineering Standard 150.1 as applicable. However, the Vendor shall be solely responsible for the adequacy of the preparation for shipment provisions. Equipment shall be prepared for 12 months of outdoor storage from the time of shipment unless specified otherwise by the Purchaser.

2. Internal parts and machined unpainted exterior parts shall be protected

with a rust preventative of a type which will not need to be removed before field operation.

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3. Exposed shafts and shaft couplings shall be wrapped with waterproof

moldable waxed cloth or vapor phase inhibitor paper. The seams shall be sealed with adhesive tape.

4. All non-machined iron and steel exterior surfaces shall be sandblasted and

coated in accordance with Polaris Engineering Standard 1400.1. Paint shall not be applied to stainless steel.

5. Packing when specified and used in the tests shall be removed from

stuffing box. New packing shall be shipped not installed. Mechanical seals shall be flushed with a rust preventative and shipped installed in place.

6. All flanges openings shall be provided with metal closures of 3/16-inch

minimum thickness with rubber gaskets and at least four full-diameter bolts.

7. Each pump shall be properly identified as required by the purchase order

with a metal tag showing item number. All miscellaneous parts shall be suitably boxed, identified with item number firmly attached to the pump, and shipped with the unit.

VII. VENDOR’S DATA

This section sets forth general proposal and purchasing requirements for centrifugal pumps, and shall be used as a supplement to the general engineering requirements of Polaris Engineering Standard 150.1. The vendor data requirements in the bid package and purchase order shall set the requirements for vendor data. A. Proposals

The Vendor’s proposal shall include the information listed as follows:

1. Copies of the Purchaser’s data sheets with complete Vendor’s information entered thereon.

2. Complete performance curves including differential head, efficiency,

water NPSHR and BHP expressed as functions of flow. The head curve for maximum and minimum impeller diameters shall be included. These curves shall indicate viscosity corrections if applicable. The eye area of the first-stage impeller and the impeller identification number shall be shown on the curve.

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3. The Vendor shall determine and indicate on the data sheet the minimum

flow required for the pump for the service indicated on the data sheet to prevent loss of suction, overheating, vibration and other damage to equipment.

4. Preliminary outline and arrangement drawings and schematic diagrams.

5. Typical cross-sectional drawings and literature to describe fully details of

the offerings.

6. A specific statement that the system and all components are in strict accordance with the Purchaser’s specifications and this standard. If they are not in strict accordance with the specifications, the Vendor shall include a specific list detailing and explaining every deviation.

7. Evaluation of proposals may include the consideration of type and sizes of

pumps, which will minimize spare parts inventory. Vendor shall provide priced spare parts recommendations for two year’s operation.

8. Vendor shall advise Purchaser in writing of the type and expiration date of

any existing labor contracts, including any clauses for re-negotiation during the life of the contract, which may interfere with Vendor’s ability to meet the quoted delivery.

9. Vendor shall recommend any alternate substitute materials and/or

construction, if his knowledge or experience indicates such substitutions are worth considerations.

10. Price breakdown of all component parts limited to, where applicable,

driver, gear, auxiliary system(s), controls and other specified accessories, as well as the pricing, if any, for all tests (witnessed or unwitnessed), certified test data and/or curves and shop inspections.

11. Maximum allowable external forces and moments on casing suction and

discharge nozzles.

B. Contract Data

The Vendor shall provide the following after purchase order award:

1. Certified composite pump and driver outline drawing providing principal dimensions, including those required for the piping design, maintenance clearances, dismantling clearances and complete information to permit adequate foundation design by the Purchaser. This shall include but shall not be limited to the following:

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a. Separate weights of pump, base and driver plus total assembled weight.

b. Dimensions of baseplate, location and size of anchor boltholes,

required anchor bolt projections.

c. Grouting details.

d. Direction of rotation.

e. Size, location, rating (ASME) and facing of flanged connections for pump and turbine driver, if any.

f. Size, location and description of Purchaser’s auxiliary piping

connections including vents, drains, cooling water and seal flush plan interfaces. Vendor shall dimensionally locate connections on drawing within 1/4 inch.

g. Size and location of electrical connections, when motor driver is

supplied by Vendor.

h. Shaft coupling make, model and size with spacer length noted.

i. Shaft seal make, model and size noted with seal flush plan provided.

2. Reproducible outline drawings of motors and turbines, if furnished by the

Vendor. Full load current and locked rotor current and/or steam consumption or steam rate shall be included.

3. A drawing and materials list showing auxiliary piping or tubing furnished

by the Vendor.

4. Maximum allowable external forces and moments on casing suction and discharge nozzles.

5. A drawing showing mechanical seal installation and setting dimensions.

Seal gland plate shall be shown in a view independent of the seal on the same cross sectional drawing including thickness, bolt circle, orientation of connections, cavity dimensions, and number and size of bolts. Connections shall have the same symbols as those stamped on the seal gland plate.

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6. Bill of material for mechanical seal including part numbers, name of parts,

number of parts required and the metallurgy of the part.

7. The Vendor shall submit certified equipment drawings “For Approval”. Approval by the Purchaser does not relieve the Vendor of his responsibility to meet all requirements of the purchase order.

8. Vendor shall submit weld procedures, weld maps and PQR’s and all other

documentation required in Polaris Engineering Standard 140.10 for approval. Fabrication shall not be started until procedures have been approved by Purchaser. Vendor shall ensure that all sub-vendors and fabricators are also in compliance

9. Every drawing and document shall include the following identification

information:

a. Purchaser/Client corporate name b. Purchase order number. c. Equipment name and item number. d. Vendor’s shop order and serial number.

10. Cross-section drawing showing part names and/or numbers and operating

and maintenance instructions (the cross-sections may be included as part of the instructions) all properly identified including job number and item number. Preferably, exploded type drawings indicating part names and numbers will be provided. All part numbers shall be expressed in the form that parts can be ordered using this number without reference to equipment serial number.

11. Operating and maintenance instruction manuals for pump, the mechanical

seal, and the driver when furnished by the Vendor. Instruction manuals shall include bearing fits, and shaft and housing fits, along with wear ring and throat bushing clearances.

12. The certified test curves and data including head, brake horsepower

recalculated to the proper specific gravity and efficiency plotted against capacity. The water NPSH curve shall be included, drawn from the actual test data, for an impeller cast from the same pattern. The curve or pump NPSH requirement shall extend from the minimum permissible capacity to the end of the curve. The curve sheet shall include the maximum and minimum diameters of the impeller supplied, the eye area of the first stage impeller, the identification of the impeller and the pump serial number. Viscosity corrections, if applicable, shall be indicated. Test data and curves shall be certified and properly identified with Purchaser’s item number and order number.

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13. Certified hydrostatic test reports.

VIII. GUARANTEE AND WARRANTY

The Vendor shall meet the guarantee requirements as stated in Polaris Engineering Standards 150.1 and 700.2 and the purchase order. Specifically, the equipment shall be guaranteed at the rated operating point to comply with the performance tolerances stated in Paragraph VI.C.8. and to comply with the vibration limits stated in Paragraph IV.G.6. The Vendor shall guarantee satisfactory continuous operation at any point over the full operating range. Operating range is defined here as that range covered by the head-capacity curve furnished. Any limiting conditions to operation, over the range shown by the curve, shall be indicated on the curve.