514-003_-_Refrigerant System and Condensate Piping Modifications.pdf

This is a contract guidance document and technical drawing set for refrigerant system and condensing piping modifications on the NOAA Ship Thomas Jefferson. The document serves as a contractual specification for the renovation and installation of piping systems aboard the vessel.

The primary scope of work involves the removal and replacement of existing refrigerant piping, condensing unit piping, and associated HVAC components throughout the main deck and various spaces of the ship. Key modifications include the installation of new air conditioning systems (AC System #1 and #2) with water-cooled condensing units rated at 50,000 to 60,000 BTU, integration with existing cooling coils, and comprehensive piping connections using seamless materials with specified fittings and valves. The work requires compliance with AIS marine standards, ASTM specifications, and includes detailed provisions for piping installation, drainage systems, isolation protocols, and pressure testing. Materials specified include copper tubing with brazed connections, ball valves, check valves, and flanged fittings per ASME standards. The document contains multiple technical plans and details showing precise locations for piping installations across different deck areas, connection points, and equipment layouts. General notes address construction requirements such as surface preparation, galvanic isolation, final composition of removal items, and compliance with federal maritime regulations and USCG guidelines for naval vessel modifications.