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Commercial Marine Industry Marine Composites Another application for deep sea composites is drilling risers for use at great water depths. Composites would significantly reduce the dynamic stress and increase either the working depth or the safety of deep water drilling. Fifty foot lines made from carbon and glass fibers, with a burst pressure of 25 ksi, have been effectively subjected to three successive drilling sessions to 10 ksi from the North Sea Prigentagone 8.4[1-9] The National Institute of Science and Technology recently awarded the Composite Production Risers Joint Venture $3.6 million from their Advanced Technology Program to develop a composites-based technology suitable for production risers and other components of offshore oil facilities that will enable access to the reserves found in deepwater tracts of the Gulf of Mexico. Westinghouse Electric and five partners were also granted an award under this Figure 1-16 Two Proposed Composite program to study test processes for Riser Geometries Utilizing E-Glass for the composites. The Spoolable Composite Bodies of the Tubes [Jerry Williams, Joint Venture received a $2.5 million Conoco, SSC/NAS Sep 1990 conference] award to study the tubular composite material described above. Platform Firewater Mains Specialty Plastics of Baton Rouge, LA has recently installed Fiberbond 20-FW-HV piping systems and connectors for fire fighting systems on three oil production platforms in the Gulf of Mexico. Rick Lea of Specialty Plastics notes that the composite piping system is price competitive with schedule 80 carbon steel pipe and one-third the cost of 90/10 copper-nickel pipe. The composite pipes weigh one-fifth what the steel weighs, making handling and installation much easier. Because no welding is required, installation is also simplified in this often harsh environment. Superior corrosion resistance reduces maintenance time for this mission critical system. [1-17] Specialty installed a system that was fire hardened with PPG’s PittChar and hard insulation in quantities to meet 30 minute endurance tests (IMO level 3) on theShell MARStension leg platform. Piling Forms and Jackets Downs Fiberglass, Inc. of Alexandria, VA has developed a line of forms and jackets for use in the building and restoration of bridge columns. The tidal zone of maritime structures is known to endure the most severe erosion effects and traditionally is the initial area requiring restoration. Common practice involves the use of a pourable epoxy to encapsulate this portion of decaying piles. Repairs using the jacketing system can also be accomplished underwater. The forms shown in Figure 1-17 are lightweight permanent forms with specially treated inner surfaces to enhance bonding characteristics. The basic jacket material is E-glass mat and woven roving in a polyester resin matrix. 18PDF Image | Marine Componsites
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