SOW_55531_CrbnDxdFrPrtctnSystmFlxblHssRnw_751.docx

55531_BEC_1224_751

General Requirements

1. SCOPE

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

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 requirements of this WI apply 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 Period of Performance. The period of performance for this work is 05MAY2025-23MAY2025

3.3 Location. The Contractor must perform the work while the USCGC WAESCHE is alongside the pier at U.S. Coast Guard Base Alameda, Coast Guard Island, Alameda CA 94501.

1.

Carbon Dioxide Fire Protection System Flexible Hoses, Renew

1. SCOPE

1.1 Intent. This work item describes the requirements for the Contractor to renew the designated hose assemblies for the carbon dioxide fire protection system.

1.2 Government-furnished property.

None.

2. REFERENCES

Coast Guard Drawings Coast Guard Drawing 750-WMSL-501-007, Rev -, Machinery Arrangements (ASC501001B) Coast Guard Publications Coast Guard Technical Publication (TP) 7096, SWBS 555, Jan 2022, Carbon Dioxide Safety Manual Coast Guard Technical Publication (TP) 7407, SWBS 555, Feb 2022, High Pressure Carbon Dioxide Fire Protection System – Series 70 Surface Forces Logistics Center Standard Specification 0000 (SFLC Std Spec 0000), 2022, General Requirements Surface Forces Logistics Center Standard Specification 5000 (SFLC Std Spec 5000), 2022, Auxiliary Machinery Systems Other References National Fire Protection Association (NFPA) Standard 12 (NFPA 12), Standard on Carbon Dioxide Extinguishing Systems, 2025 Edition

3. REQUIREMENTS

3.1 General.

3.1.1 CIR.

None

3.1.2 Tech Rep.

Not applicable.

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. The Contractor must handle all interferences in accordance with SFLC Std Spec 0000, paragraph 3.3.5 (Interferences).

3.2 Carbon dioxide system safety. The Contractor must ensure the CO2 extinguishing system is electrically and mechanically locked out in accordance with SFLC Std Spec 0000 paragraph 3.3 (work control requirements), and the requirements of TP 7096. All technicians involved in executing this WI must be trained in the hazards and safety measures required for work on CO2 extinguishing systems.

3.2.1 Warning signs must be placed to prevent unauthorized access to gas turbine enclosure during the execution of this WI.

3.2.2 CO2 flasks left unattended for any period of time must have discharge nozzle capped with a threaded fitting rated for full cylinder pressure.

NOTE

Coast Guard personnel will operate all shipboard machinery and equipment.

3.3 Hose renewal. The Contractor must renew the flexible hose assemblies for the carbon dioxide fire protection system in accordance with SFLC Std Spec 5000, Appendix C, Paragraph C2.2 (Hose assemblies).

3.3.1 Hose inspection and verification. The Contractor must validate the hoses and fittings requiring renewal, noting any deviations from the tables. Submit a CFR with the proof of procurement of materials for new hoses.

3.3.2 Prior to each hose disconnection, the Contractor must record equipment, valve, connection, and location information for use in later reconnection. Temporarily tag/label the hoses and transfer tags/labels to the new hoses to aid in reinstallation.

3.3.3 Immediately after disconnecting or removing hoses completely seal all openings to the rest of the system using metal threaded caps or metal threaded plugs.

NOTE

Plastic bags, rubber gloves, and rags of any kind are prohibited from being used to prevent leaking from hoses and for system protection.

3.3.4 The Contractor must template new hose length from each removed hose. New hose type and size must be determined from hose removed. Renew hose end fittings. Renew all o-rings, seals, two-part clamps, and mounting bolts. Dispose of removed hoses in accordance with all applicable Federal, state, and local regulations. Submit a CFR for any interfaces with the renewed hose that require replacement.

3.3.5 Hydrostatic test. The Contractor must hydrostatically test all new hose assemblies with their attached fittings, in accordance with NFPA 12, section 4.8.2. Ensure no leakage from or permanent deformation of pressure-containing parts. Submit a CFR documenting all certifications of pressure test results.

3.3.5.1 Test pressure for carbon dioxide extinguishing system flexible hoses must be 2500 psi.

3.3.6 Flush the hoses following hydrostatic testing and cap the ends to prevent contamination. Flush to a condition free of grease, oil, flux, scale, dirt, loose particles or loose corrosion products, and all other contamination foreign to the base material of the surface. Hose assemblies must be dried completely prior to installation.

3.3.7 Hose tags. The Contractor must provide new stamped or engraved metal hose tags with the following bulleted information, in accordance with SFLC Std Spec 5000, Figure C-1. Tag installation must be done in a manner that does not interfere with the normal hose flexing motion. Attach hose tags to their respective hose using metal strapping. Verify the tag can be slightly moved by hand, allowing the hose to expand and contract as designed while minimizing chaffing.

1. Hose Log Item Number (Serial Number)

1. Hydrostatic Test Pressure (psi)

1. Hydrostatic Test Date (DD/MM/YY)

1. Service Life (Replacement Date, 12 years from installation date) Date (QTR "Q"/FY)

3.4 Hose Fitting Documentation. For each renewed hose assembly, the Contractor must submit the information listed below in Microsoft Excel format. A template for the information will be provided by the COR. Submit a CFR.

1. Hose Number

1. System

1. Description (i.e. #1 A/C Inlet)

1. Location (Compartment Number)

1. Length (in.)

1. Part No.

1. Material

1. Size (in.)

1. Fitting #1

1. Fitting #2

1. Design Pressure (psi)

1. Hydrostatic Pressure (psi)

4. NOTES

TABLE 1 - Carbon dioxide fire protection system (COMPARTMENT: 5-44-01-E)