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Naval Applications of Composites Marine Composites Table 1-6 Recent Navy Composite Machinery Application Projects [George Wilhelmi, Code 823, NSWC, Annapolis] Program Objective Status Standard Family of Centrifugal Pumps Affordability through Navy-owned standardized design; max. interchangeable pump components; and improved performance & reliability with composite wetted parts Prototype manufacturing has started under design contract awarded to IDP in March 1992 Glass-Reinforced Plastic (GRP) Piping Systems Develop tech. base & design guidance for max. utilization of MIL-P-24608A GRP piping material in non-vital systems to 200 psig at 150 F; to reduce life- cycle costs associated with corrosion/erosion of Cu-Ni and steel in seawater Design practices manual/ uniform- industrial process instruction & shock guidance completed; optimization of fire protective insulation underway Composite Ball Valves Develop low-maintenance, affordable composite ball and flow control valves suitable for 200 psig/150 F service in metallic and nonmetallic piping systems Lab evaluation of commercial valve complete; ship evaluation underway; marinization strategies developed Composite Ventilation Ducting Develop corrosion-free, fire- resistant, light weight ducting to replace galvanized steel and aluminum in air supply and exhaust applications suffering accelerated corrosion damage 1st surface ship application aboard CVN71 in Feb 93 and trial installation on CG-47 class in FY95. GLCC now optimizing process and fire hardening Composite Resilient Machinery Mounts Develop lightweight, corrosion- free, shock-rated composite version of standard EES-type resilient machinery Composite prototype mounts passed hi-impact shock requirements, impact shock requirements; (6.2) near completion; requires extension over light and medium load weight range Composite Diesel Engine Develop lightweight, low-magnetic signature marine diesel engine employing metal, polymer, and ceramic matrix composite materials ONR, GLCC and private American diesel manufacturers have teamed to accelerate 6.2 R & D Composite Propulsion Shafting Develop lightweight, corrosion- free, propulsion shafting with tailorable properties for acoustic and magnetic silencing benefits Full-diam, short length, 50,000 HP AOE composite section evaluated in lab test fixture with encouraging results Composite Nuts & Bolts; Ladders; Grates; Screens Pump Impellers; etc. Exploit composites developed for U.S. chemical processing industry to solve chronic corrosion problems with steel and Cu-Ni in sewage tank and flight deck applications Most shipboard installations are proving successful following 2 to 5 years of onboard experience 36PDF Image | Marine Componsites
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