SUBMARINE FRESH WATER DRAIN COLLECTING AND RESERVE FEEDWATER TANK
Submarine coatings discussed in this section are for fresh water drain collecting and reserve feedwater tank preservation. These tanks have unique coating requirements that are more stringent than those for other tanks because they store very pure water and zinc sacrificial anodes cannot be installed in them to provide cathodic protection.
Fresh water drain collecting and reserve feedwater tanks are coated with a MIL-DTL-24441 Type III, epoxy polyamide coating. MIL-DTL-24441 Type IV coatings are prohibited in these tanks. Cold-cure touch-up paints are not to be applied to reserve feedwater tanks. In addition, powder coatings on tank manhole covers are unacceptable. Other restrictions include a prohibition of spray application of coatings in freshwater drain collecting tanks.
To ensure proper coating adhesion, special attention must be paid to the surface preparation of the substrate. All surface preparation work for fresh water drain collecting and reserve feedwater tanks must be accomplished in accordance with NAVSEA Standard Item (NSI) 009-32 and Submarine Maintenance Standard (SMS) 6310-081-015 – Submarine Preservation.
For Depot repairs, refer to Submarine Maintenance Standard (SMS) 6310-081-015 – Submarine Preservation and NSI 009-32. NSI 009-32 is the governing document for preservation requirements.
Preservation work for fresh water drain collecting and reserve feedwater tanks is accomplished in accordance with Naval Ships’ Technical Manual: Chapter 631 (NSTM 631), Preservation of Ships in Service – General provides requirements, instructions, and guidance for surface preparation and coating application.
New construction ships are painted in accordance with the submarine build specification for that class of submarine.
SUBMEPP provides centralized life-cycle maintenance solutions and support for U.S. Navy submarines and submersibles. SUBMEPP is under the Submarine Directorate of the Naval Sea Systems Command (NAVSEA).
The Naval Sea Systems Command (NAVSEA 05) is the technical authority for in-service submarine preservation-related work.
Naval Sea Systems Command, SEA 05