TGI 38JC252101A01.pdf

This is a Task Group Instruction (TGI) for replacing overboard discharge piping in the USS HOWARD (DDG-83). The work involves replacing the firemain overboard discharge piping assembly in Auxiliary Machinery Room No. One, including a nozzle assembly made of steel with specific dimensions (3-1/2 inch O.D. x 0.250 inch wall thickness) and a waster sleeve. The work affects underwater hull areas and fire zone boundaries, requiring fabrication of non-flammable closures.

The work is to be performed between April 15, 2025 and July 29, 2025, with cleanliness level III requirements for the piping system. Key specifications include Class P-2 piping standards and hydrostatic testing at 50 PSIG. The document includes a detailed material list specifying tubes, plates, screws, and other components needed for the installation. The work requires coordination with SRF-JRMC who will provide various services including crane operations, utility services, and safety inspections. The TGI is part of a larger ship repair contract package for USS HOWARD's FY25 Selected Restricted Availability (SRA) in Yokosuka, Japan.