SOW SSDG HEAT EXCHANGER CLEANING.docx

STATEMENT OF WORK (SOW)

FOR

WMSL-753 SSDG Heat Exchanger Cleaning

1. OBJECTIVE

1.1. CGC HAMILTON (WMSL-753) requires commercial cleaning and renewal of a CAT SSDG heat exchanger. This Statement of Work (SOW) outlines the requested work for commercial cleaning of this plate style cooler.

2. REFERENCES

2.1. Coast Guard Tech Pub 7119, Section 11, which is a copy of CAT Special Procedure REHS2599-091 dated 7 May 2014

3. TASKS

3.1. Transportation. The Contractor is responsible for the pickup and delivery of the heat exchanger at USCG Base Charleston in coordination with the Port Engineer.

3.2. Disassembly and cleaning. The Contractor must disassemble the heat exchanger in a shop, conduct cleaning, and replace gaskets, seals, and o-rings. Conduct disassembly and cleaning in accordance with the procedures and precautions required by TP 7119, Section 11.

3.2.1. Mark the outside of the plates diagonally and ensure plates removed for cleaning are kept in order throughout the process of cleaning.

3.2.2. Clean plates and inspect sealing surfaces and in accordance with the tech manual.

3.2.3. Clean the plates with OEM approved solvents, and do not exceed soaking times noted in the technical guidance which are known to cause damage to plates or gaskets. Recommended solvents are listed below. CAT technical support may provide an updated list.

· Paraffinic based solvent

· Naphtha based solvent

3.2.4. Solvents listed below prohibited by TP 7119 must not be used.

· Ketones (acetone, methylketone, or methylisobutyketone)

· Esters (ethlacetate or butylacetate)

· Halogenated hydrocarbons (chlorothene, carbon tetrachloride, or freons)

· Aromatics (benzens, or toluene).

3.2.5. Replace plate gaskets, seals, and o-rings using OEM parts in accordance with Tech Pub 7119

3.2.6. Document cleanliness of the inspected plates, seals, and gaskets, the solvents used, and any parts replaced. Submit documentation to the Technical Point of Contact.

3.3. Reassembly. The Contractor must have the reassemble the heat exchanger in accordance with TP 7119, Section 11.

3.3.1. Press the plates together, remove the bars, and install and torque bolts to 160 ft-lb (+/- 30 ft-lb) in accordance with the OEM torque specifications. Mark torqued bolts.

3.3.2. Replace all collars and liners – Items 6 and 8, respectively, in illustration from TP 7119, Section 11.

3.4. Test. The Contractor must test and ensure the heat exchanger has no leaks after reassembly in accordance with TP 7119 prior to delivery back to the Coast Guard. Submit testing documentation to the Technical Point of Contact.

4. LOCATION & ACCESS

· Address: USCG Base Charleston 1050 Register St. North Charleston, SC 29405

· Contractor must have a REAL ID for Base Access and must submit names to Port Engineer 01 business day prior to coordinated pick up.

5. PERIOD OF PERFORMANCE

01 July 2026 to 07 July 2026

6. TECHNICAL POC

LTJG Bryan Chan bryan.e.chan@uscg.mil

(510) 882-0364

7. NOTES

7.1. Heat Exchanger Diagram Snapshot

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