S25_082_51400_ACCndnsrRpr_758.pdf

General Requirements

USCGC STONE is currently experiencing a failure of the B side condenser on the #1 A/C skid. The condenser failed causing saltwater intrusion through the entire B side of the system. The condenser provides vital redundancy to the cooling system for electronics support equipment critical to the operation of their mission.

1. SCOPE

1.1 Intent. This standard specification invokes general requirements for conducting vessel repairs performed by commercial contractors for Coast Guard vessels.

2. REFERENCES

COAST GUARD DRAWINGS

None

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), 2022, Welding and

Allied Processes

Surface Forces Logistics Center Standard Specification 5550 (SFLC Std Spec 5550), 2022, Fire Prevention and Response

OTHER REFERENCES

None

3. REQUIREMENTS

3.1 General. The Contractor must conform to all requirements specified in SFLC Std Spec 0000 and in this item, as applicable, during the performance of this availability. The requirement of this WI applies to all work under the scope of this contract, whether explicitly stated in all following work items or not, and to all other work subsequently authorized by changes, modifications, or extensions to the contract.

3.2 Welding and brazing requirements. The Contractor must perform all welding and allied processes, and NDE in accordance with SFLC Std Spec 0740.

3.3 Materials. The Contractor must obtain all the materials required to complete this job except for the Government-furnished Property shown in Paragraph 1.2 of Work Item 1, if any specified.

3.4 Period of Performance. The period of performance for this requirement starts on 31 MAR 2026 and ends on 13

APR 2026.

3.5 Location. Condenser is currently located at USCG base in North Charleston, SC. The contractor may perform the required work at their repair facilities, if the facility is within 1000 miles of the CG base. The CG will ship the condenser to the contractor’s facility. Contractor is responsible for returning condenser to the following address.

USCGC STONE, 1050 Register St, North Charleston SC 29405.

3.6 Release of References. For any listed references to be distributed, the contractor must be registered in the Joint

Certification Program (JCP) through Defense Logistics Agency (DLA) and provide your JCP number and expiration date to the listed point of contact (POC) for this work.

3.7 Points of Contact. The USCG Technical POCs for this requirement include but are not limited to the following:

3.7.1 SFLC-LREPL Asset Manager, LTJG Justin Waters, Justin.l.waters@uscg.mil

51400_MLA_0326_758

WORK ITEM 1: Air Conditioning Condenser, Repair

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to repair a used air conditioning plant condenser, as listed on Table 1. The USCG will provide the condenser needing repairs to the

Contractor.

TABLE 1

FUNCTIONAL

SERVICE

MANUFACTURER MODEL NUMBER NOTES

Air Conditioning

Unit Condenser Ketema MHX 1208A-2P/MHX 12096003

Renew All

84 Tubes

1.2 Government-furnished property.

MTI ITEM DESCRIPTION NSN/PN

QTY ESTIMATED COST

($/UNIT)

Y Condenser, 130 Ton

Chill Water Plant

(CONDITION AS-IS.

Inoperable but repairable)

NSN: 4130-01-549-7737

PN: MHX 1208A-2P/MHX 12096003

1 ea. 54,287

2. REFERENCES

COAST GUARD DRAWINGS

None.

COAST GUARD PUBLICATIONS

Coast Guard Technical Publication (TP) S9514-F1-MMA-010, SWBS 514, Jun 2020, Air

Conditioning Plant - 130 Ton Capacity Description, HFC-134A – Description, Operation &

Maintenacne – Rev 2

Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2014, General Requirements

Surface Forces Logistics Center Standard Specification 6310 (SFLC Std Spec 6310), 2014, Requirements for Preservation of Ship Structures

OTHER REFERENCES

None.

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None.

3.1.2 Tech Rep.

None.

3.1.3 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).

3.1.4 Interferences.

None.

3.1.5 The Contractor must provide all labor, tools, and material to accomplish the AC condenser repair.

Condenser is a 2-pass shell and tube type, manufactured by Ketema LP, Model no. MHX-1208A-2P/

MHX12096003. Figure 1 shows the Air Conditioning Plant configuration.

3.2 Disassemble and clean. The Contractor must remove the condenser heads and tubes from the condenser in accordance with Coast Guard TP S9514-F1-MMA-010.

3.2.1 The Contractor must chemically clean all condenser components not being renewed (shell, sheets, heads) to remove all foreign material from the cooler internal components. Ensure any acids are fully neutralized and all foreign material is flushed from the condenser.

3.3 Condenser inspection. The Contractor must inspect the condenser shell, heads and tube sheets. Submit a CFR documenting the condition of the condenser components. Any work recommended in a CFR is out-of-scope and will not be performed as part of the work item.

3.3.1 Weld pads. The Contractor must repair or renew all condenser weld pads, see Coast Guard TP

S9514-F1-MMA-010 Figure 8-12 for specifications. If the existing pad thickness is not the same as the referenced drawing, clad weld or renew the pad to the same thickness found on the condenser shell.

Submit CFR.

CAUTION

The Contractor must follow all necessary steps outlined in the Tech Pub to keep contaminants such as metal shavings out of the system during the tube renewal process.

3.4 Condenser tube renewal. After any authorized repairs are completed, the Contractor must install 84 new tubes in the condenser in accordance with CG TP S9514-F1-MMA-010, Section 6-7.

3.4.1 After successful tube installation, the Contractor must conduct leak testing and certify the condenser is ready for service in accordance with CG TP S9514-F1-MMA-010, Section 6-2.

3.5 Reassembly. The Contractor must reinstall condenser heads using new gaskets and seals. Renew all zinc anodes.

3.6 Touch-up preservation. The Contractor must prepare and coat the repaired condenser to match existing adjacent surfaces in accordance with SFLC Std Spec 6310, paragraph 3.1.13 (Touch-ups and minor coating repairs.) A full top-coat must be applied to the condenser.

FIGURE 1. AIR CONDITIONING PLANT CONFIGURATION

4. NOTES

This section is not applicable to this work item.