SOW Refrigerant Plant Inspect_Repair.pdf

STATEMENT OF WORK: Refrigeration Plants, Inspect and Repair/Replace

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to troubleshoot, flush, repair/replace, and test the NR1 and NR2 refrigeration plants (Make: Bailey Refrigeration Co, Inc. / Carrier Type 90YR20 Salt Water Cooled) onboard USCGC Vigilant (WMEC-617).

1.2 Government-furnished property.

MTI ITEM

DESCRIPTION

NSN/PN QTY ESTIMATED

COST

($/UNIT)

Y Compressor, Reciprocating

NSN: 4310-01-571-6959

PN: 06DR8200DA365A

2 ea. 4,870.00

N Condenser NSN: 4130-01-576-5680

PN: MHX-602B-4

2 ea. 4,964.00

N Evaporator, Chill Box NSN: 4130-01-576-4489

PN: KLP103VE

1 ea. 1,036.00

N Evaporator, Freeze Box NSN: 4130-01-576-5706

PN: KLP104VE

2 ea. 1,550

2. REFERENCES

COAST GUARD DRAWINGS

Coast Guard Drawing 618-WMEC 516-004, Rev B, Diag of SS Refrigeration Sys. & S.W.

Cooling Piping

Coast Guard Drawing 618-WMEC 516-006, Rev A, Mods Incidental to the Carrier Reefer Plant Install

COAST GUARD PUBLICATIONS

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements

Surface Forces Logistics Center Standard Specification 0740 (SFLC Std Spec 0740), 2020, Welding and Allied Processes

Surface Forces Logistics Center Standard Specification 5000 (SFLC Std Spec 5000), 2022, Auxiliary Machine Systems

OTHER REFERENCES

NSTM 516 Refrigeration Systems can be provided upon request due to size of file.

3. REQUIREMENTS

3.1 General.

3.1.1 Protective measures. The Contractor must furnish and install all protective measures in accordance with SFLC Std Spec 0000, paragraph 3.3.3 (Vessel component, space, and equipment protection).

3.1.2 Interferences. The Contractor must handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences). Known interferences include, but are not limited to the following:

Refrigeration piping and valves

Insulation

Electrical control cabinets and wiring

Compressor oil and refrigerant (R134A)

Salt Water piping and valves

3.1.3 Facility & Personnel Qualifications. The Contractor is preferred to be an authorized Carrier or Bailey contractor. All personnel handling refrigerant must be AC&R certified specifically for handling R134A refrigerant and complexity of repairs.

3.2 Refrigeration plant repairs. The Contractor must perform the following repairs to the NR1 and NR2 refrigeration systems using Coast Guard Drawings 618-WMEC 516-004 and 618-WMEC 516-006 as guidance.

3.2.1 Refrigeration plant, secure. Secure and tag-out electrical power to the NR1 and NR2 refrigeration plants.

3.2.2 Capture and Discard. The Contractor must capture and remove all refrigerant/oil from all components in the refrigeration system using an approved vacuum pump and reclamation system.

3.2.3 Component Removal. The Contractor must remove all vital components prior to mechanical flushing, including compressors, condensers, chill box evaporators, freeze box evaporators, receivers, accumulators, TXVs, oil separators/filter, filter driers, and back-pressure regulating valves for both the NR1 and NR2 refrigeration systems

3.2.4 Deep system flushing. Completely disconnect and mechanically flush both NR1 and NR2 refrigeration systems to remediate catastrophic internal failures. The contractor must make sure that no connection dead heads so that debris/contamination does not build up in the system. This will be a complete flush of all piping and components remaining in the system.

NOTE:

SYSTEMS CONTAIN SEVERE CONTAMINATION, INCLUDING THICK

METALLIC SLUDGE AND DEBRIS COMPLETELY CLOGGING THE

OIL SEPARATORS AND FILTER DRIER HOUSINGS.

3.2.4.1 Utilize a specialized high-volume recirculating flushing pump (such as a Goodway flushing system) and an approved refrigeration cleaning solution (such as CF20 or equivalent).

3.2.5 Component replacement. The contractor must submit a CFR for each sub paragraph to 3.2.5.

3.2.5.1 The Contractor must replace compressors, condensers, chill box evaporators, and freeze box evaporators for both the NR1 and NR2 refrigeration systems utilizing the Government-furnished property listed in Section 1.2. Prior to disposal or turn-in, thoroughly inspect the removed NR1 and NR2 compressor to document the extent of internal damage.

3.2.5.2 Inspect and remove the Thermal Expansion Valves (TXVs) for the chill box and freeze box, which have been compromised by debris. Contractor to provide replacement of TXVs if necessary.

3.2.5.3 Remove and replace the Raw Water (R/W) cooling flex hoses.

3.2.5.4 Accumulators. The Contractor must remove and replace the accumulator bladder.

3.2.6 System inspection and piping repair. Conduct a comprehensive inspection of the remaining refrigeration plant infrastructure. Submit a CFR per sub paragraph.

3.2.6.1 Inspect receivers, accumulators, oil separators, filter-driers, refrigeration piping, strainers, and associated regulating valves. Clean, pressure test, disassemble, or replace components as required based on inspection findings. Contractor to provide necessary replacement parts not listed in Section 1.2 if not available in military stock system.

3.2.6.2 Inspect all refrigeration system crossover and isolation valves. Replace valves showing signs of significant degradation or missing components (e.g., stem locking hardware) to ensure NR1 and NR2 circuits can be positively isolated from one another.

3.2.7 Final flush prior to operation. The Contractor must flush the system with dry nitrogen once all components and piping connections are renewed.

3.2.7.1 Insulation. The Contractor must restore insulation to removed interferences and apply to all condensing piping.

3.2.8 Electrical and control cabinet restoration. Conduct a comprehensive repair and restoration of both NR1 and NR2 refrigeration control cabinets.

3.2.8.1 Restore the #1 and #2 control cabinets to their intended configuration while installing new GFE compressors.

3.2.8.2 Overhaul electrical components. Based on discrepancy reports, replace necessary internal cabinet components. Contractor to provide required switches, fuses, relays, and hardware if not available in military stock system.

3.2.8.3 Test all safety, pressure controls, oil pressure controls, relays, wiring, and protective devices for proper operation in both cabinets.

3.3 Operational test, post repairs. Clear all tags. After completion of work and in the presence of the Coast Guard Inspector, the Contractor must thoroughly test and demonstrate the equipment to be in satisfactory operating condition with assistance from ship’s force. Submit a CFR.

3.3.1 Pressure test both refrigeration systems with dry nitrogen, perform a leak check, evacuate, and perform a vacuum decay test (pulling system to 500 microns).

3.3.2 Fill both systems with new compressor oil and R134A refrigerant.

3.3.3 Individually operationally test both NR1 and NR2 through a complete box temperature pull down.

3.3.4 Record and verify operating pressures, temperatures, oil pressure, superheat, subcooling, and box temperatures during final testing. Ensure there is no fluctuation in oil pressures.

4. PERIOD OF PERFORMANCE.

The Government has established three potential Periods of Performance (POPs) for this requirement:

Primary: 19 October – 30 November Secondary: 26 October – 7 December Tertiary: 2 November – 14 December

The Government reserves the exclusive and unilateral right to determine and designate which POP will be utilized based on operational requirements. All required services shall be completed during the single period of performance established by the Government.

Prior to award, offerors must explicitly state and confirm their availability to perform the required services during any of the three specified periods (Primary POP, Secondary POP, or Tertiary POP). The authority to select and direct which period of performance is executed rests solely with the Government.

5. LOCATION.

CGC VIGILANT

9235 Grouper Road, Cape Canaveral, FL 32920