TJ-528-009A - Grey Water Sewage Modifications.pdf

This document is a detailed technical drawing set for Grey Water and Sewage System Modifications for the NOAA Ship Thomas Jefferson. The drawings comprehensively detail piping modifications across multiple ship zones, including sewage washdown systems, piping installations, grey water forward piping modifications, and various tank system reconfigurations. Key technical specifications include pipe sizing (ranging from 1/4" to 2-1/2"), material standards (primarily ASTM A-53 steel), and modifications to existing systems such as sewage, ballast, and grey water holding tanks. The drawings are part of the documentation for RFP 1305M225R0034, which covers FY26 Dockside Repair Services for the vessel, and are designed to provide precise engineering guidance for system upgrades and reconfigurations.

The technical drawings include multiple views and sections, such as plan views, section views, and detailed piping diagrams for different ship decks and compartments. They specify removal and replacement of existing piping, installation of new valves and connections, and precise routing for various water and sewage system components. The modifications appear to involve comprehensive updates to the ship's grey water, sewage, and associated piping systems, with careful attention to existing infrastructure and new system integration. The document is marked as revision A and was prepared by Trident Maritime Systems for the National Oceanic and Atmospheric Administration (NOAA).