7-26-0159 Scope of Work.pdf

RFP 26-0159

Request for Proposals for Maintenance and Repair of Vertical Turbine Pumps

SCOPE OF WORK

1. INTENT

The City of Arlington Water Utilities is soliciting proposals from qualified firms to provide maintenance, inspection, removal, repair, remanufacture, reinstallation, and emergency services for Vertical Turbine Pumps (VTPs) and associated equipment located at various City pump stations and water treatment facilities.

The intent of this contract is to establish a qualified vendor capable of providing both routine and emergency services, including complete pump remanufacture to OEM tolerances when required.

2. LOCATIONS

Services may be required at, but are not limited to, the following pump stations and facilities:

• Arkansas Pump Station (multiple units)

• Charles F. Anderson Pump Station (multiple units)

• JK High Service Pump Station (multiple units, including engine-driven units with right-angle drives)

• JK West High Service

• JK Backwash Pumps

• PB High Service

• PB Filter Backwash

• PB Recycle Pumps

• Raw Water Pump Stations

The City reserves the right to add or remove facilities during the contract term.

3. GENERAL SCOPE OF SERVICES

The Contractor shall provide all labor, supervision, tools, equipment, transportation, materials, parts, and incidentals necessary to perform the following:

3.1 Field Services

• Removal and reinstallation of vertical turbine pumps

• Disconnection and reconnection of pump and motor assemblies

• Unbolting pumps from baseplates and discharge piping

• Coordination with City personnel for lockout/tagout (City retains responsibility for electrical lockout unless otherwise specified)

• Provision of temporary well or clearwell covers after pump removal

• On-site troubleshooting and diagnostics

• Vibration analysis and field balancing

• Start-up, commissioning, and performance testing

• Emergency response within 24 hours of notification

3.2 Shop Services

• Complete pump disassembly and inspection

• Cleaning for inspection and measurement

• Dimensional analysis of shafts, bearings, wear rings, and registers

• Preparation of written inspection and condition assessment reports

• Remanufacturing to OEM tolerances where required

• Machining (bearing bores, shaft journals, wear ring fits)

• Shaft straightening to specified TIR tolerances

• Dynamic balancing of impellers

• Bearing replacement (bronze, nickel bronze, stainless steel, Viton, etc.)

• Fabrication of special bearings or wear components

• Replacement of shafts (e.g., 416 stainless steel bowl shafts)

• Coupling inspection and repair

• Mechanical seal inspection and repair

• Assembly and final inspection prior to shipment

3.3 Coating and Surface Preparation

• Abrasive blasting to Commercial Finish or White Metal as specified

• Application of NSF 61 approved coatings (e.g., Carboline 891 or approved equal)

• Coating thickness of 12–14 mils DFT unless otherwise specified

• Holiday testing and thickness verification

• Touch-up of painted surfaces when full recoating is not required

3.4 Transportation & Rigging

• Provision of cranes (e.g., 30-ton or as required)

• Provision of transport vehicles (tractor-trailer or equivalent)

• Securing pumps during transport to prevent column deflection

• Coordination of shipping to coating facilities and subcontractors

• Return transport and reinstallation

4. REPAIR METHODOLOGY

The Contractor shall follow a documented repair and remanufacturing methodology including:

1. Receipt and order creation

2. Pre-teardown inspection and dimensional documentation

3. Disassembly

4. Cleaning for inspection

5. Detailed inspection and measurement

6. Internal report and City-facing report with photos

7. Quotation and lead time (if outside predefined scope)

8. Component repair/remanufacture

9. Component coating

10. Reassembly

11. Final inspection

12. Shipment preparation

The City may request either:

• Part Replacement Repairs (replacement of wear components only), or

• Full Remanufacture Repairs (restoration to OEM tolerances and fits)

The selected contractor must be capable of both approaches.

5. INSPECTION & REPORTING REQUIREMENTS

The Contractor shall provide written inspection reports that include:

• As-found dimensional measurements

• Bearing clearances

• Wear ring clearances

• Shaft runout measurements

• Register fits and tolerances

• Photographic documentation

• Repair recommendations

• Identification of components outside acceptable tolerances

• Final test and vibration readings (post-installation)

Reports shall be submitted electronically in PDF format.

6. LABOR CLASSIFICATIONS

The Contractor shall provide, at minimum, the following labor classifications:

• Field Service Technicians (routine and emergency rates)

• Staff Engineers

• Shop Mechanics

• Machinists

• Vibration Analysts

• Project Managers

Emergency service must include on-site response within 24 hours unless otherwise negotiated.

7. MATERIALS & PARTS

The Contractor shall:

• Provide OEM or equivalent quality parts

• Fabricate custom components when necessary

• Supply stainless steel hardware where specified

• Provide specialty bearings and wear components

• Offer a percentage discount off published price lists for parts (if applicable)

• Maintain adequate inventory or supply chain capability

8. EQUIPMENT REQUIREMENTS

The Contractor must have:

• Machine shop capabilities (turning, milling, boring, vertical lathe operations)

• Two-plane dynamic balancing capability

• Grit blasting and enclosed coating facilities

• Overhead crane lifting capacity appropriate for large VTP components

• Field service fleet capable of pump removal and installation

• Vibration analysis equipment

• Coating thickness and holiday detection equipment

9. SAFETY REQUIREMENTS

The Contractor shall:

• Comply with OSHA and all Texas safety regulations

• Provide confined space trained personnel when required

• Coordinate with City safety protocols

• Provide crane operators and certified personnel

• Maintain appropriate insurance and bonding as required by Texas municipal law

10. EMERGENCY SERVICES

Emergency services shall include:

• 24-hour availability

• Mobilization within 24 hours of notification

• After-hours, weekend, and holiday service capability

• Temporary stabilization if full repair cannot immediately occur

11. WARRANTY

All repaired or remanufactured components shall be warranted for a minimum of twelve (12) months from installation or eighteen (18) months from shipment, whichever occurs first, unless otherwise specified in the final contract.

12. QUALIFICATIONS

Proposers must:

• Demonstrate experience repairing vertical turbine pumps in municipal water/wastewater facilities

• Provide references from Texas municipalities

• Have licensed Professional Engineers available (Texas PE preferred)

• Maintain appropriate certifications (e.g., ISO 9001, UL 508A, etc., if applicable)

• Demonstrate field vibration and performance testing capability

13. PRICING STRUCTURE

Pricing shall be submitted in the format required by the City and may include:

• Hourly labor rates (routine and emergency)

• Shop labor rates

• Staff engineer rates

• Unit pricing for pump removal, disassembly, and inspection

• Repair scenario pricing

• Percentage discount off published parts price lists

• Transportation and crane costs (clearly itemized)

The City reserves the right to purchase according to actual need and does not guarantee quantities.