SOW Chill Water System.pdf

Total of 1 System required to support the USS Helena

Contractor Supplied Equipment:

1. Only Fresh Water will be circulated through the cooling system described below and shown in Figure

(1).

2. Chill Water System must consist of at least three chillers. System must be able to support varying capacity from 30 to 120 tons of cooling capacity. System shall consist of two thirty (30) Ton Chillers and one sixty (60) Ton Chiller.

3. System shall be able to allow isolation of each chiller separately to support varying chill water loads shipboard.

4. Must be air cooled.

5. Must have a pumping system, consisting of at least two pumps. System must be able to provide a variable supply of 30 to 350 GPM. Each pumping apparatus must be capable of maintaining 100 feet of head supply pressure, all GPM ranges, at the contractor provided supply manifold. At a minimum, the pumping system shall have a minimum of 100 GPM at 100 feet of head pressure of redundant capacity. The expansion tank shall supply water directly to the pumps as shown in Figure (1).

Additional pumps downstream of the chiller unit(s) may be utilized to raise supply pressure to meet the required 100 feet of head pressure requirement at the contractor supplied supply manifold.

6. Must have suction and discharge manifolds with a quantity of four (4) 2-1/2” MNPT supply connection and a quantity of four (4) 2-1/2” MNPT discharge connections. All manifold connections shall have isolation globe valves installed.

7. Within the cooling loop there must be a reservoir capable of holding at least 250 gallons of cooling water or as required to support system design. Reservoir is required to account for small leaks.

Reservoir must be transparent in order to visibly verify the water level within the tank.

8. System shall include a bypass line in order to flow water when no services are connected to the contractor supplied supply and discharge manifolds. This bypass line shall include globe valves so the flow can be throttled as required to suit Ship’s demands and to keep the chiller units running under low flow / pressure conditions.

9. Desired output water temperature range is 55° F - 65° F.

10. Must be operable on a single 460/480 (V), 400 Amp Breaker (MAXIMUM).

11. Must be provided with a male 500 mcm Camlock electrical connection.

12. System must have necessary equipment to prevent freezing recirculating water with no cooling load at 0° F.

13. CRITICAL SYSTEM SUPPORT: Unit must be capable of operating twenty-four (24) Hours a day, seven (7) Days a Week.

14. Must be operable at flow rates of as little as 30 GPM without needing to recirculate flow.

15. Contractor is to provide all equipment from the return manifold to the supply manifold. System shall be a complete unit. If pumps or tanks are separate, vendor will provide all piping/valves/fittings as required to couple pumps to the Chill Water Units. Vendor is to provide Extra fittings and hoses to support installation. If the system requires assembly, the system shall be assembled in such a way that it does not cause tripping hazards by minimizing the lengths of hoses between components. If lengths of hoses are longer than needed, it should be able to be coiled and put somewhere out of the way of normal foot traffic. Hoses shall be routed in a way that does not cause the hose to kink and reduce flowrate.

16. Chiller Unit(s) must be capable of operating in an industrial environment where dust, dirt, and sea air are present.

17. Chiller Unit(s) to be equipped with operational Inlet and Outlet Temperature Gages.

18. Chiller Unit(s) to be equipped with operational Outlet Pressure Gage.

19. System is to include operational pressure gages on the contractor provided supply and discharge manifold.

20. Unit shall have an electronic monitoring system that monitors inlet and outlet temperature, pressure and flow rate. The system shall be able to notify NNSY personnel when the monitored parameters fall outside of a set range.

21. If chiller system holds 55 gallons or more of fuel or oil or similar fluid, provide an environmental catch tank capable of holding at least 110% of the capacity of the fuel, oil and other fluids required to operate the rental unit.

22. Evaporator must be capable of delivering a leaving temperature of less than 65° F.

23. Condenser must be capable of operating in a wide ambient temperature range (0-125° F).

24. Unit must be affixed with a metal tag designating the supplying company, a POC responsible for repairs and maintenance, and a phone number for the POC who is responsible for repairs and maintenance.

25. Contractor to adhere to the rigging requirements as outlined in Attachment B for contractor equipment at Norfolk Naval Shipyard.

26. The gross weight of the unit shall be clearly marked on the outside of the unit as outlined in Attachment B. If the unit is not a complete unit, the gross weight of each component shall be clearly marked on each component.

Chiller

P

P

P

Tank

Bypass Line

Figure (1) – Line Diagram of Proposed System

Note 1: Final system may consist of different quantities of Chillers and Pumps (P) than shown in Figure

(1) as long as the requirements above are met.

Note 2: Final system may change the order of components as long as the requirements above are met.

Note 3: Freeze protection is not shown in Figure (1). A freeze protection method shall be included for the system in the event there is no cooling load on the system.

CONTRACTOR RESPONSIBILITY:

1. Equipment delivery, setup and removal is to be at no cost to the government.

2. If the unit requires assembly, the contractor shall assemble the unit at no cost to the government.

3. Provide all parts requiring repair or replacement under circumstances of normal equipment wear and tear at no additional charge.

4. Contractor is responsible for ensuring that all preventative maintenance is performed on equipment prior to delivery to the government as well as performing preventative maintenance as specified by the equipment’s manufacturer preventative maintenance schedule during the term of the rental period with the government. Contractor is responsible for all travel associated with preventative maintenance. Contractor is responsible for providing service technicians that are able to meet the badging and security requirements of Norfolk Naval Shipyard/NOB.

5. Post contact information for service/repair of equipment directly on the rental equipment. Contact information must be packaged to withstand being located in an outdoor environment.

6. The contractor shall dispatch a representative in response to a service request to repair and/or replace a chill water unit within four (4) hours of notification by NNSY at no additional charge.

Regardless if request is placed during normal business hours. Contractor is responsible for travel associated with repair of equipment. Contractor is responsible for providing service technicians that are able to meet the badging and security requirements of Norfolk Naval Shipyard/NOB.

7. “Per FAR 22.102-1(a) entitled ‘Safety’, Contractors are hereby informed that their employees or representatives present on property under Norfolk Naval Shipyard cognizance must follow Federal and State OSHA requirements and Norfolk Naval Shipyard OSHE Program Manual, NAVSHIPYDNORINST P5090.2 requirements or safety requirements for site specific location of the contract.

a. Contractors and Non-NNSY Government Agencies (NNGAs) are hereby informed that their employees or representatives present on property under Norfolk Naval Shipyard (NNSY) cognizance must adhere to Federal OSHA requirements for Hazardous Energy Control IAW 29 CFR 1915.89 and must follow Hazardous Energy Control (HEC) procedures as identified in NAVSEA’s Occupational Safety, Health, and Environment Corporate Manual (OSHECM) Chapter 250 (latest revision), when performing work under NNSY contract. All HEC work to be performed by Contractors and NNGAs requires that NNSY Technical Points of Contact (TPOCs) and/or Contracting Officer’s Representatives (CORs) be notified of the HEC scope of work prior to starting work. Any changes or deviations in the initial scope of HEC work requires the NNSY TPOCs and/or CORs be informed of the change/deviation. Appendix 250.B-1 through B-3 of OSHECM Chapter 250 for multiple employer work identifies when Contractors and NNGAs are required to assign their Lockout/Tags-Plus Coordinator (LOTC) to coordinate HEC work with the cognizant NNSY LOTC. HEC locks shall be provided by the contractor or NNGA for their employees use. The HEC locks shall have red bodies with name labels or name tags affixed, identifying who installed the HEC lock(s) and a point of contact telephone number. HEC lock name labels and tags must be made of materials that will hold up to the environment to which they are exposed. HEC tags used for Tags-plus HEC work shall be provided by the cognizant NNSY LOTC to the contractor or NNGA for their use of machinery, equipment, or systems (MES) cannot be locked out. OSHECM Chapter 250 Tags-Plus procedures will be strictly followed.

b. Contractors and NNGA’s may obtain electronic copies of OSHECM Chapter 250 (latest revision) and access the OSHA 1915.89 web site by using the following link to NNSY’s public access website: http://www.navsea.navy.mil/shipyards/norfolk/default.aspx.

c. Names and contact information for NNSY LOTCs and/or the Facility Custodian will be provided by NNSY TPOC and/or CORs set forth elsewhere in this award document.”

8. “Per FAR Clause 52.217-8: The Government may require continued performance of any services within the limits and at the rates specified in the contract. These rats may be adjusted only as a result of prevailing labor rates provided by the Secretary of Labor. The option provision may be exercised more than once, but the total extensions of performance hereunder shall not exceed 6 months.

9. When the equipment is required to be removed to the contractor’s facility for repair or replacement, the contractor shall be responsible for loss or damage from the time it leaves the government site until it is returned to the government.

10. Provide start up training of equipment to the government. Contractor is responsible for all travel associated with providing startup training of equipment to the government.

11. Clean the chill water unit(s) prior to delivery to the following requirements:

a. Chill water unit shall be cleaned to a degree of cleanliness that results in a surface free of grease, oil, flux, scale, dirt loose particles and any other matter foreign to the base metal. Adherent light superficial ruse on steel surfaces, caused by short time exposure to the atmosphere, is acceptable.

b. For uncoated surfaces: Adherent corrosion products typical on surfaces of the type material being considered (e.g. flash rust on steel) are acceptable. Loose corrosion products are not acceptable and must be removed.

GOVERNMENT RESPONSIBILITY:

1. Provide operators.

2. Perform basic maintenance.

a. Monitor all gages.

3. Equipment movements within the shipyard.

4. Lost items and equipment damage beyond normal wear and tear.

OPTIONS:

1. Provide options to allow NNSY to continue rental of the chill water unit in one month increments. The government reserves the right to extend the rental period for an additional six (6) months in one (1) month increments. Rental extensions may terminate the rental of one or more units based on use by NNSY. This charge will be prorated.

NOTES:

1. New or used equipment may be provided. NNSY reserves the right to inspect the propose equipment prior to contract award.

2. The Chill Water Unit will be exposed to everyday weather, and saltwater air. It is the contractor’s responsibility to provide any protective coverings for the unit.

3. The government reserves the right to return the rental unit at any time prior to the expiration of the rental period. The contractor agrees to prorate costs for the time the units are in use by NNSY only.

The government agrees to give the contractor twenty-four (24) hour notice for return of units prior to expiration of rental period.

Requirements for Lifting of Equipment

1. The equipment shall be outfitted with suitable attachments for overhead lifting.

1.1. For multiple lift point lifts, each lifting attachment shall be capable of supporting one half the gross weight of the equipment with a design factor of five to one based on ultimate strength. For single point lifts the lifting attachment shall be capable of supporting the gross weight of the equipment with a design factor of five to one based on ultimate strength.

1.2. For multiple point lifts each lifting attachment shall be designed to accept a standard anchor shackle (Federal Specification RR-C-271D, type IVA) which is capable of supporting one half the gross weight of the equipment. For single point lifts the lifting attachment shall be designed to accept a standard anchor shackle (Federal Specification RR-C-271D, type IVA) which is capable of supporting the gross weight of the equipment.

1.3. Design of the lifting attachments shall be such that the attachments and shackles are not side loaded more than 10° out of the plane. Lifting attachments shall be located such that the lifting slings do not contact the equipment, or alternatively a spreader beam certified to NAVFAC P- 307 shall be provided. Whenever practical, the lifting attachments shall be located above the center of gravity, and such that the lifting slings do not contact the equipment housings.

1.4. Each lifting attachment shall be conspicuously marked in a contrasting color “Lift Here.” Letters shall have a minimum height of 1”.

2. The equipment shall be marked in a prominent location with the gross weight. Sand hoppers, tubs, or other containers that may contain material shall be marked with the empty and full weight (or alternatively the empty weight and working load limit). Marking shall be upper case letters of a contrasting color, with a minimum height of 1”. Marking shall include the units (i.e. “pounds”, “long tons”, etc.).

3. The equipment shall be provided with a lifting sketch / rigging diagram that meets the requirements of enclosure (1).

3.1. The lifting sketch shall detail any specific requirements and / or configurations that must be met prior to lifting (i.e. “engage swing lock”, “Tilt mast back fully”, “Rotate lifting basket over side”, “Utilize 10’ minimum length slings”, “Spreader beam required”, etc.).

3.2. The lifting sketch shall include the location of the center of gravity on the equipment (full fuel, hydraulic tanks, etc.), equipment model/manufacturer, and gross weight.

3.3. A copy of the lifting sketch shall be permanently posted on the equipment, and a copy shall be forwarded to Code 714 (396-3345, 3346).

4. If specialized handling gear other than shackles, standard slings, or chainfalls (i.e. spreader beams, special lift rigs, etc.) is required, the contractor shall furnish it. This handling gear shall be provided certified in accordance with NAVFAC P-307, with written documentation of proof testing.

Rigging Sketch Requirements

Rigging sketches, as a minimum, shall identify the following:

1. The weight of the load.

2. The location of the center of gravity.

3. The minimum crane capacity.

4. The minimum capacity / length of slings.

5. The minimum capacity of other standard rigging gear.

6. The attachment (lifting) points for the load.

a. The attachment points for multiple leg lifts shall be sized such that each attachment point can support half the load’s weight at the anticipated lift angle.

b. The attachment point for single leg lifts shall be sized such that the attachment point can support the entire load’s weight.

7. Limitations on allowable orientations for any parts making up the lifting assembly.

8. For single leg vertical lifts using twisted rope (wire or synthetic), two parallel ropes each capable of supporting the entire load alone shall be required unless a method is used to prevent unlaying the rope.

9. A minimum D / d ratio of one shall be required where wire rope slings pass over any object, or in the eyes of wire rope slings. A minimum D / d ratio of two shall be required where synthetic rope slings pass over any object, or in the eyes of synthetic rope slings.

a. “D” represents the diameter of the object the sling passes over.

b. “d” represents the diameter of the sling.

c. Table 14-3 of NAVFAC P-307 lists efficiency factors as various D / d ratios.

10. Components in each handling assembly shall be sized based on the worst case distribution of loads.

a. When making a two, three or four point lift, the handling gear shall be sized so that two legs can support the load without exceeding the safe working load (SWL) at the lift angle expected, unless an equalizing method is used.

11. When nonstandard gear is required (i.e. round stock lifting bars) written instructions shall be provided that ensure:

a. The proper material is being used.

b. The item is certified IAW NAVFAC P-307.

c. Any special requirements or dimensions are followed to ensure that engineering assumptions are met (i.e. eccentricity of the bearing points).