TJ-551-003C SSDG UPGRADES COMPRESSED AIR MODS.pdf

This document is a technical drawing specification for compressed air piping modifications on a naval vessel, specifically detailing upgrades to the ship service diesel generator systems.

The drawing shows a material list of piping components including fittings, valves, elbows, couplings, and related hardware constructed from materials such as steel, cast iron, and stainless steel. The specifications reference ASTM standards (A-53, A-105, A-106, A-240) and require compliance with USSG and ABS standards for welding and brazing. Key general notes indicate that the purpose is to show compressed air piping modifications for Thomas Jefferson-class vessels converted in October 2011, with all materials and workmanship to be in accordance with specification MOA-03000. The piping is to run generally as shown with minor deviations permitted for onboard conditions. All piping must be hydrostatically tested as required by NOAA specifications, cleaned, flushed, and inspected prior to acceptance. The drawing includes both elevation and plan views of the engine room layout showing three engine installations with foundation and tank top elevation details. The document references applicable ships including NOAA vessel designations and indicates this is part of a broader Ship Service Diesel Generator Upgrades and Compressed Air Modifications project. The drawing is identified as TJ-551-003 and appears to be sheet 2 of 3 in the complete specification set.