conditions of tendering - barbados water...
TRANSCRIPT
BARBADOS WATER AUTHORITY
TENDER FOR THE
SUPPLY OF SUBMERSIBLE
AND BOOSTER PUMPS
November 2014
1. GENERAL -DESCRIPTION OF TENDERThe Barbados Water Authority (BWA) currently obtains its water supply from twenty-three (23) groundwater wells, two (2) springs and one (1) privately-owned reverse osmosis desalination plant. This water is distributed through a network consisting of approximately three thousand two hundred kilometres (3,200 km) of water mains, thirty (30) reservoirs located both under and above ground and seventeen (17) re-pumping stations (booster-stations). Research has shown that ninety-nine percent (99%) of the BWA’s energy consumption is related to the production of water and that ninety-eight percent (98%) of the total expenses in electricity was related to energy and fuel cost. With such high figures, the BWA has to adopt innovative energy initiatives/technologies and policies, if it wants to grow economically and prosper, hence the need for this procurement; Equipment upgrades and Energy Efficiency alternatives.
2. INSTRUCTIONS TO TENDERERS2.1 All tenderers must supply the following information in their bids.
Failure to provide the information will render the bid void: -a. Registration number of company;b. Country in which company is registeredc. The date on which the company was first incorporatedd. A copy of company’s Certificate of Incorporation, as
evidence that the company is in existence at the date of the bid, and the names and addresses of all company directors
e. In the case of sole proprietorships or partnerships, the names and addresses of owners must be supplied. If the business is registered under the Registration and Business Names Act, a copy of the registration must be provided
f. Tenderers must provide a copy of their VAT Registration Certificateg. Tenderers should be aware that the labour clauses of
(Public Contracts) Act, Cap. 349 shall, in so far as is applicable to the subject of the tender, apply to any contract made in respect of the tender
h. Submission of documents in Section 7.0 - Submittals of Appendix 1 – Technical Specifications.
i. The submission of Tables P.3 and P.4 in Appendix 2. The tables are to be submitted as is.
j. Failure to provide the abovementioned information will render the tender void.
2.2 Tenders should be submitted in sealed envelopes marked “Tender for the
Supply of Submersible and Booster Pumps” addressed to:
The ChairmanAudit, Finance and Tenders Committee
Barbados Water AuthorityManor Lodge
Green HillSt Michael
2
to reach the office no later than Friday December 19, 2014 at 4:30pm.
2.3 Tenders are to be placed in the Tenders Box which is located at the BWA’s
Office in Building #3 Manor Lodge Complex, Green Hill, St Michael.
2.4 No Tender will be considered unless it complies with the conditions set out in this Notice.
2.5 The BWA does not bind itself to accept the lowest or any Tender.2.6 The BWA reserves the right to annul the process at any time
prior to theaward of Contract without incurring any liabilities.
2.7 Any Tender delivered after the closing time and date or any extension thereof will not be considered.2.8 All tenders must be quoted in either Barbados Dollars or US
Dollars CIF Bridgetown Barbados. Tenders quoted in US dollars will be evaluated using the prevailing exchange rate at the date of closing of the tender. Payment in US dollars shall be made at the buying rate set by The Central Bank of Barbados at the time of payment. Tenders quoted in Barbados dollars shall be inclusive of VAT.
2.9 The BWA reserves the right to refuse any tender that does not conform to the requirements of this document.
3. PENALTIESThe BWA reserves the right to enforce penalties against a tenderer for delays occasioned by him in the execution of delivery schedule. The penalty shall apply from the stated completion date of the particular phase. The total penalty shall not exceed 5% of contract sum.
CONDITIONS OF TENDERING 1. Acceptance of Tender and Tenderer’s Expenses
The Board will not reimburse the Tenderer for any expense incurred in the preparation of this tender.
2. Firm Price
3
No price variation clause may be included in the Tender. Prices in Barbados or US dollars must be quoted and such prices shall include for all materials, labour, plant, equipment, transport, handling of materials, tools and appliances and all other things necessary for the execution of the work.
3. Tenderer to Obtain Their Own InformationThe Tendered shall inform himself on all matters necessary for compliance with and completion of the Contract and in all matters that might in any way affect the prices quoted by him.
4. PaymentsThe method of payment to be followed shall be agreed to by the BWA and the Tenderer prior to signing the contract. All payment terms must be clearly stated in Tenderer’s proposal.
5. InsuranceThe Tenderer shall obtain adequate insurance to indemnify the BWA against all claims for death, injuries, damage to property and losses sustained by the Tenderer during the procurement and performance of duties under this Contract.
6. AddendaAny interpretation of, or change in the Tender Document prior to the specified closing date, will be made only by Addendum issued by the Board to each Tenderer to whom the Tender Document has been issued and it shall become part of the Tender Document.
7. Contract DocumentsThe Contract documents will comprise of the following:
(a) The Schedule of Requirements(b) The Conditions of Contract(c) The Technical Specifications
8. Compliance with Conditions of Tendering
4
The Tenderer must comply with all the above Conditions of Tendering. Failure to comply with or breach of any of the Conditions shall disqualify the Tender.
9. Performance SecurityThe successful Tenderer shall furnish the performance security in a form acceptable to the BWA within twenty-seven (27) days of the receipts of notification of award from the BWA. The performance security must be in a sum equivalent to ten percent (10%) of the contract price.The performance security shall be valid for one (1) month after the date for completion of the Supplier’s obligations, and shall be denominated in the currency of the contract or in a freely convertible currency acceptable to the BWA and shall be in one of the following forms:-
(a) A bank guarantee irrevocable letter of credit, issued by a bank located in Barbados, acceptable to the BWA and in the form provided in the Bidding Document or another form acceptable to the BWA; or
(b) A cashier’s or certified cheque payable to the BWA or cash.
The performance security will be discharged by the BWA and returned to the supplier not later than thirty (30) days following the date of completion of the supplier’s performance obligations, including any warranty under the Contract.
10. Evaluation Criteria:The BWA will seek to select the most economically advantageous tender with the optimum price/quality split. The Tenderer with the lowest initial quote will not necessarily be selected since the BWA will consider the whole life cycle costs of the goods to include cost of spare parts, maintenance, energy consumption and disposal. The BWA will make its final determination on a combination of the following:
(a)Cost(b)Quality Analysis(c) Technical Analysis(d)Time Frame analysis
5
(e)Capability
CONDITIONS OF CONTRACT1. Period of Contract
One (1) year
Termination of ContractThis Contract shall be terminated for convenience by any one of the parties to the Contract by a written notice of 90 calendar days.The BWA shall be entitled to terminate this Contract and to recover from the Contractor the amount of any loss resulting from such determination due to non-performance by the Tenderer.
6
APPENDIX 1TECHNICAL SPECIFICATIONS
7
TABLE OF CONTENTSCONDITIONS OF TENDERING.......................................................................................................................5
SPECIFICATIONS FOR PUMPS...................................................................................................12
SCOPE....................................................................................................................................................12
2.0 SUBMERSIBLE-SETS......................................................................................................18
2.1. Pump-End......................................................................................................................18
2.2. Motor...............................................................................................................................19
3.0 BOOSTER-SETS.............................................................................................................22
3.1. Pump-End......................................................................................................................23
3.2. Motor...............................................................................................................................24
4.0 MANUALS.........................................................................................................................26
5.0 SPARES..............................................................................................................................28
6.0 SPECIAL TOOLS.............................................................................................................29
7.0 SUBMITTALS...................................................................................................................29
8.0 WARRANTY...................................................................................................................32
9.0 QUALITY ASSURANCE.............................................................................................33
10.0 SHIPPING.........................................................................................................................34
11.0 REFERENCE STANDARDS.........................................................................................35
12.0 TRAINING.........................................................................................................................35
APPENDIX 2...............................................................................................................................................37
8
LIST OF ACRONYMS
AC Alternating CurrentANSI American National Standards InstituteASME American Society of Mechanical EngineersBASEEFA British Approvals Service for Electrical Equipment in
Flammable AtmospheresBS British StandardBWA Barbados Water AuthorityCE Conformité Européenne (European Conformity)CIMFR Central Institute of Mining and Fuel ResearchCSA Canadian Standards AssociationDIN Deutsches Institut für Normung (German
Institute for Standardization)EN European StandardFM Frequency ModulationIEC International Electrotechnical CommissionIEEE Institute of Electrical and Electronic EngineersISO International Organization for StandardizationLCIE Laboratorie Central Des Industries Electricques
(France)NEC National (legal aspects and) Electrical CodesNEMA National Electrical Manufacturers AssociationPREN Pitting Resistance Equivalent NumberSCADA Supervisory Control and Data AcquisitionUL Underwriters Laboratories Inc.VFD Variable Frequency Drive
SPECIFICATIONS FOR PUMPSSCOPEThis specification covers the design, manufacture, assembly, testing at manufacturer's works / other, supply and delivery of sixty (60) submersible and fifteen (15) booster sets (pump and motor). These units (submersibles and boosters) are required by the BWA as replacements.
Certain performance requirements, materials, features and design requirements are specified herein. It is not the intention in these specifications to specify in complete detail the various components of the equipment. This is left to the experience and practice of the Manufacturer
9
who shall furnish equipment, which shall meet, in all respects, the specified requirement in regard to performance, durability and satisfactory operation. However, certain features, materials and design requirements are specified and intended to establish minimum standards for the work. Additional accessories, such as temperature and moisture sensors used for satisfactory operation and completeness shall be provided as part of this Bid.
These units will be utilized by the BWA for the extraction of clean ground water from wells, and not boreholes, and the distribution of potable water to their customers and storage tanks.
10
1.0 GENERAL : All units shall be of the fixed flow or radial flow centrifugal type. The units shall be used to pump chlorinated ground water for
potable use with an average hardness of one hundred and eighty milligrams per litre (180 mg/l) whose temperature is approximately twenty-seven degrees Celsius (27ºC).
The electrical supply shall be four hundred and fifteen volts (415 V), three (3) phase, fifty Hertz (50 Hz) Alternating Current (AC) with the exception of the Prospect location which is two hundred and twenty volts (220 V), three (3) phase, fifty Hertz (50 Hz) Alternating Current (AC).
The units’ motors shall be designed to supply their rated outputs at deviations of up to plus or minus five percent (± 5%) of the rated frequency and up to plus or minus ten percent (± 10%) of the rated voltage. These voltage variations shall be possible without over heating the windings.
All materials used in the construction of the sets are to be suitable for envisaged duties as described in the specifications below. All materials used are to conform to the latest requirements of the appropriate EN or BS specification or any other reputable international standard. During evaluation special consideration shall be given to material choice and quality.
All components and material used shall have smooth surfaces (interior and exterior) free from cracks, porosity, blowholes, or other irregularities.
All terminal flanges shall be drilled to B.S. 10 Table E 1962 (DIN100PN16). Where recommended flange sizes differ (e.g. where PN25 is recommended, provide adaptor flange with PN25 thickness drilled to Table E specification), the required adaptor shall be provided.
It is expected that the sets will operate satisfactorily for a period of not less than five (5) years with minimum maintenance works being required.
The operational hours of the requested pumps are eight thousand seven hundred and sixty per year (8,760/yr.). With this in mind the design and construction material used shall be such that promotes the highest efficiency and the lowest
11
energy consumption possible. In other words, the motors supplied shall be premium efficiency motors or higher and the construction material shall be stainless steel (austenitic) or equivalent where stated.
All parts of the units in contact with the water shall be manufactured from materials which are conventionally known to be non-toxic, non-contaminating and biologically inert (100% lead free). These materials shall be resistant to internal and external corrosion, or protected from corrosion by a suitable surface treatment.
The units shall be so designed to operate with and/or in water that has a chlorine residual of at least one point zero parts per million (1.0 ppm) or one point zero milligrams per litre (1.0 mg/l). Please note that the chlorine used for disinfecting the water is dosed in the well, therefore the submersibles will be directly exposed to high concentrations of chlorine.
The presence of any visible surface porosity or other defect(s) shall be cause for rejection since this will have a very detrimental effect.
The pump housing shall be capable of withstanding a pressure that is at least one point five (1.5) times the closed valve pressure.
The bearings shall be adequately sized, sufficiently and efficiently lubricated for at least fifty thousand hours (50,000 hrs.) continuous smooth and vibration free operation. Bearing seals shall effectively prevent the ingress of water to the bearings or the motors.
All seals shall be of the mechanical type.All sets (pumps and motors) of each unit (submersibles and boosters)
shall have no dangerous critical or resonance frequencies or multiples of resonance frequencies within twenty percent (20%) above and thirty-five percent (35%) below the operating speed of the pump.
The efficiency at the specified duty will be a consideration in the evaluation of the offer. Therefore complete performance curves of each set shall be submitted with the offer. The minimum acceptable electromechanical/overall/wire-to-water efficiency shall be sixty percent (60%) for the submersibles and seventy percent (70%) for the boosters.
Both the pump and motor performance specifications
12
shall be clearly labeled on the individual units, i.e. a nameplate, preferably of metal, shall be stamped to the pump-end (with the pump performance specifications, the serial and model numbers indelibly marked on them) and the motor-end (with the motor performance specifications, the serial and model numbers indelibly marked on them). Manufacturers have been sending inferior nameplates (of plastic-which fall off during shipment) with coded information relative to their company which gives our technicians difficulty in identifying the units.
The motor nameplate shall include at minimum: Make, Model, Serial number, maximum rated current, rated power output, Cos∅, Voltage, RPM, Frequency and Full Load Amps (FLA).
The motors shall be provided with stator winding temperature sensors and main bearings temperature sensors. These sensors will be monitored and used to control the equipment through a Variable Frequency Drive (VFD) and Supervisory Control and Data Acquisition (SCADA) system so required accessories for this shall be provided. It shall be clearly stated in the offer if the above has been provided.
All units are to be supplied fully assembled.
13
Table P.1Pump Duties – Submersibles
STATION PUMP SPECIFICATION QTYHampton, Sweetvale 2, Waterford 1.0MGD@550 ft_hd 6
0.5MGD@550 ft_hd 4Newmarket 1.5MGD@350 ft_hd 1St.Joseph Hospital shroud & well 0.5 IMGD@190 ft_hd 2
1.0MGD@270 ft_hd12
0.5MGD@350 ft_hd 9Belle, Hampton 2.0MGD@270 ft_hd 6Trents, Lears 0.5MGD@220 ft_hd 5Applewhaites Shroud, Carlton, Molyneux 0.75MGD@220 ft_hd 6Applewaites W.F. 0.25MGD@350 ft_hd 6Alleynedale, Applewaithes 1MGD@350 ft_hd 3Total 60
Haymans, Appleswhaites Ten, Constant, Whim, Molyneux (shroud)
Ashton-Hall, Belle, Bowmanston, Hampton, New-Market (shroud), Waterford
Apes Hill, Ashton-Hall (shroud), Applewaithes, Carrington, Greens (Woodland), Sweetvale 1
Table P.2Pump Duties – Boosters
STATION PUMP SPECIFICATION QTYAlleynedale to Warleigh 0.3 IMGD@350ft_Hd 1
1.0 IMGD@155ft_HD 8Lodge-Hill to Shop Hill 1.0 IMGD@270ft_HD 2Warleigh to Rock Hall 0.75 IMGD@600ft_HD 2Prospect-Indian Ground 0.09 IMGD@220ft_HD 2
TOTAL 15
Belle to Cave Hill/Hanson, Codrington to Lodge Hill, Hampton to Rising Sun/Sunbury
These operating points are to be considered as the duty point of the units 14
and will be used for evaluation purposes. Also note that the combining of more than one (1) pump to achieve the above duty points will not be allowed. In other words, the arranging of two (2) or more pumps on a manifold/skid in series or parallel to achieve the required flow/head/both is not allowed. The flow is stated in imperial million gallons per day.
2.0 SUBMERSIBLE-SETS2.1. Pump-End
All components shall be constructed or manufactured out of high quality corrosion resisting austenitic or better stainless steel material (i.e. the impellers, pump casing, bowls, net rings, pump and motor shafts, diffusers and covers, etc.). However, bearing surfaces may be constructed from bronze or sintered rubber. The minimum acceptable stainless steel grade shall be DIN EN 1.4401, with a Pitting Resistance Equivalent Number (PREN) greater than or equal to twenty-three point one (≥ 23.1). These components must be machined and finished to a high standard. NB: For clarity, the PREN will be determined as follows:o PREN = 1.0(%Cr.) + 3.3(%Mo.) + 16(%N.)
Cr – Chromium Mo – Molybdenum N - Nitrogen
Impellers shall be precision machined for maximum hydraulic efficiency, positively keyed to the pump shaft and dynamically balanced in order to avoid slippage while pumping.
Adequate precautions are to be taken by the manufacturer to prevent any galvanic corrosion taking place between dissimilar materials.
Lubrication of any pump shaft bushings shall be from the pumped liquid itself.
Foot valves, unless normally fitted are not necessary.The discharge nozzle shall be flanged, as previously mentioned, and
sufficiently rigid to support the pumping unit under all operating conditions.
2.2. MotorThe motors shall be NEMA design B squirrel-cage induction type,
15
whose insulation rating is compatible with VFD operation.The motors shall be a premium efficiency motor or better.The motors shall be sized such that an unity power factor or as close
as possible to unity (no less than 0.89 or 89%) is achieved at the mentioned duty points in Table P.1.
The motors shall be constructed or manufactured out of high quality corrosion resisting austenitic or better stainless steel material (stator tube, rotor, etc.). The minimum acceptable grade shall be DIN EN 1.4401, with a PREN greater than or equal to twenty-three point one (≥ 23.1). These components must be machined and finished to a high standard.
The material used for all components shall have the mechanical strength required to withstand frequent start-ups (up to six (6) per hour). Also this material shall be especially resistant to crevice corrosion with respect to the rotor projecting-end.
The motors shall be asynchronous with coupling arrangements conforming to NEMA standards or equivalent.
The motors shall be liberally rated for starting under the most extreme conditions of service and shall have a sturdy construction capable of extended running without maintenance.
The preference of motor type is encapsulated type (i.e. non-rewindable), however we will accept rewindable.
The motors shall be of the water or emulsion filled wet rotor design with the necessary seals to separate the lubricant from the water being pumped.
The motor lubricating system shall under no condition contaminate the pumped water. The stator cooling liquid shall be non-toxic, free from any oil, and factory packed. The motor shall be fitted with a uni-directional valve such that no water can enter from outside.
All rotating parts shall be carefully machined and dynamically balanced. The rotor is to be equipped with protection sleeves for guide bushings.
Where there is a choice of more than one motor for the duty, strict preference shall be given to the shorter unit. In other words, preference shall be given to a shorter and broader motor over one that is tall and slender; except for the Applewhaites Wellfield our wells can accommodate ten inch (10”) and bigger motors
16
with ease.The Applewhaites Wellfield locations carry the 0.25IMGD@350ft_Hd
submersible pump where the size diameter of the motor and / or pump must be approximately five and a half inches (5.5”); when the cable has been placed in the discharge flange’s recess (gouged to accommodate cable) the largest diametrical measurement of the flange and the cable is six inches (6”). The pump is to be inserted in an eight inch (8”) borehole so the largest diametrical measurement on the submersible’s body must not exceed six and a quarter inches (6.25”).
Each motor is to be supplied with seven point six metres (7.6 m) or twenty-five feet (25 ft.) of flexible cable of suitable dimension to withstand the current taken by the motor at starting and when running at full load. The cable sheathing is to be mechanically strong enough and also heat resistant up to one hundred degrees Celsius (100°C) and not to be subject to deterioration in water. Round cable is preferable in all classes/specifications.
All conductors of the power cables shall be of copper. Each conductor shall be insulated by synthetic rubber insulation suitable for continuous immersion in water. All cables shall be jacketed. The jacket material shall be oil and water resistant synthetic rubber. Cable sizes shall be determined in accordance with IEE wiring regulations. Cable entry to the motor shall be designed to incorporate both a seal and strain relief function.
Motors shall be supplied with a no-load and a full load test certificate as well as a balancing test certificate for its rotors.
The motors shall be suitable for operation with a solid state power supply consisting of an adjustable frequency inverter for speed control and Direct on Line (DOL) operation. In other words, the motors shall also be suitable for operation under VFD control. However, a VFD shall not be required in order to achieve the duties stated in Table P.1.
The motors shall be suitable for the current waveforms produced by the power supply including the harmonics generated by the VFD.
The motors shall be designed to operate continuously at any speed over the range sixty to one hundred and ten percent (60-110%) of rated speed unless otherwise specified in their data sheet.
The permitted voltage variation shall take into account the steady
17
state voltage drop across the Alternating Current (AC) VFD and all other system components upstream of the motor.
The motors shall be constructed to withstand torque pulsations resulting from harmonics generated by the solid-state power supply.
The motors insulation shall be designed to accept the applied voltage waveform, within the Vpeak and dv/dt limits as per IEC-61800-4.
3.0 BOOSTER-SETS All booster-sets shall be vertical multistage in-line centrifugal pumps
with a totally enclosed fan cooled motor.The sets shall be capable of continuous satisfactory operation in an
environment with the following climatic conditions:o Mean Temperature - 38 ºCo Mean Relative Humidity - 80%
All boosters shall be designed to permit the removal of the impeller, shaft and bearings without disturbing the suction and discharge connections.
The noise level of installed equipment shall not exceed eighty decibels (80 dB), as measured by an appropriately calibrated instrument conforming to ANSI S1.40 or equivalent. The required sound level limit shall be met at a minimum of four (4) locations, each not more than five (5) feet above the floor and not more than five (5) feet from the equipment. It shall be noted that the motor will be operated through a VFD and therefore this requirement shall apply to all operating speeds.
3.1. Pump-EndAll components shall be constructed or manufactured out of high
quality corrosion resisting material such as austenitic or better stainless steel or treated ductile cast iron EN-JS1030 or equivalent or better (i.e. the impellers, pump casing, bowls, net rings, pump and motor shafts, diffusers and covers, etc.). However, bearing surfaces may be constructed from bronze or sintered rubber. The minimum acceptable grade of stainless steel shall be DIN EN 1.4401, with a PREN greater than or equal to twenty-three point one (≥ 23.1). These components must be machined and finished to a high standard. NB: For clarity, the
18
PREN will be determined as follows:o PREN = 1.0(%Cr.) + 3.3(%Mo.) + 16(%N.)
Cr – Chromium Mo – Molybdenum N - Nitrogen
Impellers shall be precision machined for maximum hydraulic efficiency, positively keyed to the pump shaft and dynamically balanced in order to avoid slippage while pumping. The impeller shall be given a plastic coating or epoxy (thickness of at least two hundred (200) microns) to prevent corrosion when made from cast iron/ductile cast iron.
Adequate precautions are to be taken by the manufacturer to prevent any galvanic corrosion taking place between dissimilar materials.
Lubrication of any pump shaft bushings shall be from the pumped liquid itself.
The discharge nozzle shall be flanged, as previously mentioned, and sufficiently rigid to support the pumping unit under all operating conditions.
3.2. MotorThe motors shall be NEMA design B squirrel-cage induction type,
whose insulation rating is compatible with AC VFD operation.The motors shall be a premium efficiency or better motor; that is
ninety-four percent (94%) or higher efficiency at one hundred percent (100%) design point mentioned above.
The motors shall be sized such that unity power factor or as close as possible to unity (no less than 0.89 or 89%) is achieved at the mentioned duty points in Table P.2.
The motors shall be constructed or manufactured out of high quality corrosion resisting material such as austenitic or better stainless steel or ductile cast iron EN-JS1030 or equivalent or better (stator tube, rotor, etc.). The minimum acceptable grade of stainless steel shall be DIN EN 1.4401, with a PREN greater than or equal to twenty-three point one (≥ 23.1). These components must be machined and finished to a high standard.
The material used for all components shall have the mechanical strength required to withstand frequent start-ups (up to six (6)
19
per hour). The motors shall be asynchronous with a coupling arrangement
conforming to NEMA standards or equivalent. The motors shall be liberally rated for starting under the most extreme
conditions of service and shall have a sturdy construction capable of extended running without maintenance.
All motors shall be moisture proof, fan cooled induction motors requiring the three (3) phase electrical supply out-lined under 'General - Item 3'.
All rotating parts shall be carefully machined and dynamically balanced. The rotor is to be equipped with protection sleeves for guide bushings.
Each motor is to be supplied with seven point six metres (7.6 m) or twenty-five feet (25 ft.) of flexible cable of suitable dimension to withstand the current taken by the motor at starting and when running at full load. The cable sheathing is to be mechanically strong enough and also heat resistant up to one hundred degrees Celsius (100°C). Round cable is preferable in all classes/specifications.
Motors shall be supplied with a no-load and a full load test certificate as well as a balancing test certificate for its rotors.
The motors shall be suitable for operation with a solid state power supply consisting of an adjustable frequency inverter for speed control and Direct On Line (DOL) operation. In other words, the motors shall also be suitable for operation under VFD control. However, a VFD shall not be required in order to achieve the duties as stated in Table P.2.
The motors shall be suitable for the current waveforms produced by the power supply including the harmonics generated by the VFD.
The motor shall be designed to operate continuously at any speed over the range sixty to one hundred and ten percent (60-110%) of rated speed unless otherwise specified in data sheet.
The permitted voltage variation shall take into account the steady state voltage drop across the AC VFD and all other system components upstream of the motor.
The motors shall be constructed to withstand torque pulsations resulting from harmonics generated by the solid-state power supply.
20
The motors insulation shall be designed to accept the applied voltage waveform, within the Vpeak and dv/dt limits as per IEC-61800-4.
2.03.04.0
4.14.0 MANUALS
Two (2) type of manuals shall be provided; a product manual and an operations and maintenance (O&M) manual. These manuals (product and O&M) shall be for each class/specification per type and not each unit offered. For example, in Table P.1 there are eleven (11) classes/specifications but sixty-two (62) units, therefore only eleven (11) copies of each manual shall be submitted giving a total of twenty-two (22) manuals for the submersibles.
Within one (1) month of the signing of the Contract, the manufacturer shall submit to the BWA for approval, two (2) draft copies of each type of Manual (product and O&M) by class/specification for each unit to be supplied.
The Product Manuals shall include but not be limited to the following: literature, pump selection catalogue, family curves and standard pump curves.
The O&M Manuals shall give a step by step procedure for any operation likely to be carried out during the life of the units including erection, testing, operation, calibration, dismantling and repair and shall include but not necessarily limited to the following detailed information, as applicable for the particular unit:-:o Manufacturer’s name;o Date of manufacture;o Manufacturer’s address, telephone number, facsimile
number, telex number;o Equipment function, normal operating characteristics and
limiting operations;o Assembly, disassembly, installation, alignment,
adjustment, and checking instructions;21
o Operating instructions for start-up, routine and normal operation, regulation and control, shutdown, and emergency conditions;
o Lubrication and maintenance instructions (preventative and corrective);
o A guide to troubleshooting (troubleshooting procedures, with a cross-reference between symptoms and corrective recommendations);
o Serial numbers of each unit set (i.e. pump and motor serial numbers) of the same class/specification;
o Reorder numbers for each unit and its constituent components of the same class/specification;
o The manufacturer’s two (2) year warranty;o Letter of conformation from the manufacture of the five (5)
year guarantee/warranty for impeller(s), bowl(s) and Pump housing.
o A list and description of components with predicted life of parts subject to wear;
o Schedule of recommended spare parts for three (3) years maintenance;
o Up-to-date cost data for spare parts;o Factory and field test reports;o Outline, cross-section and assembly drawings; engineering
data; electrical diagrams, including elementary diagrams, wiring diagrams connection diagrams, word description of wiring diagrams and interconnection diagrams and any other appropriate information.
o A maintenance schedule per class/specification showing daily, weekly, monthly, bi-annually and annually preventative activities to be performed on the sets (pumps and motors).
Following the BWA’s approval of the drafts, the Manufacturer shall, either before or on delivery of the units (submersibles and boosters), supply three (3) bound copies with a Detailed Table of Contents of each Manual (Product and O&M) together with three (3) electronic versions in .pdf (Adobe Acrobat) format on CD-ROM.
The product and operation and maintenance manuals shall be in 22
addition to any instructions or parts lists packed with or attached to the equipment when delivered.
5.0 SPARES Spares shall be readily interchangeable with the parts they
replace, and shall comply with these Specifications. The required repair kits shall be provided for each pump
class/specification for the satisfactory operation of the equipment for at least five (5) years with minimal maintenance. At a minimum the repair kit shall consist of: wear rings, neck rings, o-rings, bearings/bushings, screws, shaft seals, gaskets, washers/spacers, vent parts and thrust pads.
The manufacturer shall guarantee spare parts availability, for supplied equipment, for a minimum period of ten (10) years.
A complete and detailed spare parts list for all equipment supplied shall be submitted with the offer. The spare parts list shall also include an exploded view of the sets (pump-ends and motors), together with annexed part numbers, such that easy reference is possible when searching for part numbers. A price list for the complete spare parts list shall also be included.
Painting requirements for spare parts shall be identical to those for original, installed parts. Where no painting or protective coating is specified, suitable provisions shall be made to protect against corrosion.
6.0 SPECIAL TOOLS Any special tools deemed necessary for use during maintenance,
installation or any other works to be executed on the units, shall be supplied as part of this contract.
7.0 SUBMITTALS Four (4) electronic copies (CD/DVD) of the latest version of the
manufacturer’s “selection software” shall be provided with the offer. Submission of this required software will be part of the evaluation process.
23
Manufacturers shall supply detailed technical literature of the units (submersibles and boosters), including but not limited to the following:o Characteristic/performance curves (originals) showing the
main operating data at the respective duty point, as shown in Tables P.1 & P.2. As a minimum the graphs shall indicate the pump curve (Head (feet_Hd) Vs Flow (litres/min), pump efficiency (% Vs Flow (litres/min), electromechanical efficiency or wire-to-water efficiency (% Vs Flow (litres/min), absorbed power (kW Vs Flow (litres/min) and NPSHr (m Vs. Flow (litres/min)). Original performance curves certified by the pump manufacturer shall be furnished and photocopies will not be accepted even if certified by the local agent.
o If the offered impeller is not the original standard size (Manufacturer is going to trim the impeller) the performance curves before trimming of the impeller shall also be submitted with the offer and it shall be clearly marked as ‘Performance curves before trimming the impeller’.
o All type test certificate(s) in accordance with internationally recognized standards, such as ISO 9906; 2012 - Rotodynamic Pumps, Hydraulic Performance Tests or ANSI/HI 14.6 or equivalent. The date of such certificate(s) shall be within the last two (2) years from the date of Bid opening/Opening of the Bid.
o No load, full load and balancing test certificates for the motor and rotor respectively.
o A dimensioned cross sectional view of the sets complete with materials of manufacture and the main recommended spare parts.
o The following reports on materials of neck-rings, pump bowls, pump casing and impeller shall be provided by the pump manufacturer: Mechanical properties of the material used (Tensile
strength and consistency, Hardness, etc.). Chemical composition of the material used (C, Cu, Cr,
24
Mo, N, Ni, P, S, Sn, Zn, etc.). Relevant BS/ISO/DIN/equivalent standards for
materials. Coating materials.
o Overall dimensions and weights of the pump and motor.o Detailed technical literature and drawings of the motors
offered (including dimensional drawings).o Characteristic curves showing the main operating data at
the respective duty point are also required for the motor. As a minimum the graphs shall indicate the motor curve, the motor efficiency (% Vs power (kW)), motor current (A Vs. power (kW)) and the power factor (% Vs. power (kW)).
o All necessary information for operation and maintenance, such as service, disassembly and assembly procedures.
o Parts list of all components including a list of recommended spare parts.
o A separate price list of spare parts for the sets (pump-ends and motors). These are to be accompanied with exploded views of the corresponding pump-ends and motors. It shall be stated if the price list for spares will be held firm for the next three (3) years. If in the negative, they shall state price escalation for mentioned spares for the next three (3) years.
o A list of recommended tools and materials required to carry out the necessary maintenance.
o A maintenance schedule per class/specification showing daily, weekly, monthly, bi-annually and annually preventative activities to be performed on the sets (pumps and motors).
o Coupling flange and output shaft dimensional drawings.o For bearings, the type of bearing, the life of the bearing
and the method of lubrication.o Data on shop painting of all parts/components, interior and exterior. A compiled report showing the certified test records and results,
for the hydrostatic test, motor test (routine and complete) and vibration test.
One (1) hard copy each of the Product and Operation and 25
Maintenance manuals for each unit (submersible and booster) class/specification.
Tables P.3 and P.4 in Appendix A shall be completely filled in for each unit (submersible and booster).
Warranty documentation including statement of duration of warranty period and contact phone numbers and addresses for warranty issues.
8.0 W A R R A N T Y A minimum of twenty-four (24) months guarantee/warranty
period on performance, material and workmanship for all equipment is to be quoted. During this period the manufacturer shall replace the pump housing, bowl(s) or impeller(s) in case of damage or failure, at no cost to the BWA and minimum interruption of the water system.
This period commences on the date of BWA’s written acceptance of the equipment. Defects shall include any failure of the goods to meet the manufacturer’s specifications or the description contained in the manufacturer’s product literature. If within the warranty period the BWA discovers such a defect, the manufacturer shall repair or replace the defective item or component free of charge. If after three (3) attempts the manufacturer is unable to eliminate a defect, or if the manufacturer does not commence the warranty work within the time allowed in this paragraph, BWA shall have the right to return the defective item or component and, at the BWA’s option, either obtain a full refund of the purchase price of the goods or obtain a refund, in an amount to be agreed upon by the parties, of the portion of the purchase price of the goods that is allocable to the defective item or component. The manufacturer shall commence all warranty work within forty-eight (48) hours of receiving notice of the warranty claim. All warranty work shall be performed at the BWA’s facilities unless otherwise agreed by the parties. If warranty work is performed at manufacturer’s facilities, manufacturer shall pay all shipping costs, including the cost of return shipment. This warranty shall apply to all repair parts furnished by manufacturer and all repairs performed by
26
manufacturer. The manufacturer shall pay for all labour costs to remove the goods and to reinstall them.
The manufacturer shall provide an equipment warranty log book prepared specifically for this project and submit two (2) copies of the document to the BWA prior to final payment. The equipment warranty log book shall include a summary listing of all equipment warranties provided, date received, and start date and end date of warranty period. A copy of each equipment warranty and equipment start-up certification shall also be provided in the document.
The manufacturer shall have available to the BWA an Engineer with experience in hydraulics, pumping equipment both selection and operation and water systems. This individual will be the contact person for the BWA with regards to any issues whether they are operational/maintenance related or the acquiring of future equipment.
9.0 Q U A L I T Y A SS U R A NCE Only manufacturers who have in operation at their
manufacturing facilities a quality assurance system in accordance with ISO 9001:2008, with certification for, at least, manufacture function, will be considered. For this reason manufacturers are to submit certifications to this regard including scope of certification, from accredited inspectors with the offer.
10.0 S H I PP I N G All equipment shall be suitably packaged to facilitate handling
and to protect against damage during transit and storage. In addition the units (submersible and booster) shall be so protected as to be safe from spoilage and corrosion for twelve (12) months after entry into the BWA’s stores. All equipment shall be boxed, crated, or otherwise completely enclosed and protected during shipment, handling, and storage. All equipment shall be protected from exposure to the elements and shall be packaged in a manner able to keep the equipment dry at all times. Painted and coated surfaces shall be protected against impact, abrasion, discoloration, and other damage.
27
Painted and coated surfaces which are damaged prior to acceptance of equipment shall be repainted to the satisfaction of the BWA.
The equipment may be stored outdoors for long periods before installation. Therefore the packaging shall also be suitable for outdoor storage areas with heavy rains / high ambient temperatures and other ambient tropical conditions such as relative humidity/moisture, etc. unless otherwise agreed.
Grease and lubricating oil shall be applied to all bearings and similar items. Blank off flanged connections on the pump with bolted wood
covers not smaller than the flange outside diameter. Plug all openings in the pump.
Cover electric motor with weather-proof polyethylene sheeting before mounting and crating.
Before shipping each item of equipment shall be tagged or marked as identified in the delivery schedule or on the Shop Drawings. Complete packing lists and bills of equipment shall be included with each shipment.
11.0 REFERENCE STANDARDS Reference to standards, specifications, manuals, or codes of any
technical society, organization, or association, or to the laws or regulations of any governmental authority, whether such reference be specific or by implication, shall mean the latest standard specification, manual, code, laws or regulations in effect at the time of opening of Bids, except as may be otherwise specifically stated in the Contract Documents.
12.0 TRAINING Not necessary.
28
APPENDIX 2
29
Table P.3 - SubmersiblesItem No. 1
Pump Model Motor Model Pressure Class - PNx Discharge Size-Flanged Flow – IMGD Flow - L/min TDH - ft_Hd Minimum possible pump Operating Head (ft_Hd) Maximum possible pump Operating Head (ft_Hd) Pump Efficiency - % NPSHr - ft. Power required by pump - kW Electric Power Required by motor - kW Motor nominal power - kW Load Factor - % Service Factor Motor Efficiency -% Motor Power Factor Motor Speed at duty point - rpm Starting Amps Running Amps at duty point Full Load Amps Annual Energy Consumption at duty point in kWhr (use 8,760 hrs.) Method of starting Power cable length (m/ft.) Motor Length - mm Motor Diameter - mm Pump Diameter -mm Overall Wire to Water Efficiency at duty point Pump Weight/Motor Weight - lbs Total Weight - lbs
Pricing Pump Price Motor Price
Total Each CIF Barbados
Total each with CIF Barbados Quantity Delivery - weeks
Pump/Motor Type Total Metal Name-plate on Pump (Y/N) Metal Name-plate on Motor (Y/N)
30
Table P.4 - BoostersItem No. 1
Pump Model Motor Model Operating Temperature (°C) Pressure Class - PNx Discharge Size-Flanged Flow - IMGD Flow - L/min TDH - ft_Hd Minimum possible pump Operating Head (ft_Hd) Maximum possible pump Operating Head (ft_Hd) Pump Efficiency NPSHr - ft. Power required by pump - kW Electric Power Required by motor - kW Motor nominal power - kW Load Factor - % Service Factor Motor Efficiency Motor Power Factor Motor Speed at duty point - rpm Starting Amps Running Amps at duty point Full Load Amps Annual Energy Consumption at duty point in kWhr (use 8,760 hrs.) Method of starting Power cable length (m/ft.) Motor Length - mm Motor Diameter - mm Pump Diameter -mm Overall Wire to Water Efficiency at duty point Pump Weight/Motor Weight - lbs Total Weight - lbs
Pricing Pump Price Motor Price
Total Each CIF Barbados
Total each with CIF Barbados Quantity Delivery - weeks
Pump/Motor Type Total Metal Name-plate on Pump (Y/N) Metal Name-plate on Motor (Y/N)
31
ADDITIONAL EVALUATION CRITERIA FOR PUMPS Efficiency Power required by pump NPSHr Delivery time
Motor length
Load Factor at duty point (using this eqn. LF={(Pe/ƞm)/Pnom}) where Pe – Electric Power required by motor in kilo-watts (kW); ƞm – Efficiency of the motor operation; Pnom – Motor nominal power in kilo-watts (kW)