NEW PIPING MATERIALS INVESTIGATED FOR SHIPBOARD USE

Concerned by the weight and maintenance requirements of present metallic piping systems for Hydrofoils and Surface Effect Ships, the Naval Sea Systems Command tasked the David Taylor Naval Ship Research and Development Center to investigate the performance of Glass-Reinforced Plastic (GRP) Piping as an alternate material to provide a corrosion-free, lightweight, low-cost system for the U.S. Navy. Special emphasis was placed on the performance of GRP pipe, fittings, and bonded joints as to fire resistance, joint quality, fatigue performance, shock resistance, erosion resistance, and marine fouling characteristics. Center engineers have investigated systems which incorporate a resin-saturated, chemical-resistant, glass-reinforced liner strengthened by continuous strands of fiberglass filament wound at an angle of approximately 55 degrees to the pipe axis. The composite pipe wall is filament wound under tension on rotating cylindrical mandrels by either wet winding or pre-impregnated tape winding techniques. Pipe sizes range from one to twelve inches in diameter. Extensive installation of GRP piping has been made in the Navy's newest hydrofoil, USS PEGASUS (PHM-1), and to date, all systems are performing satisfactorily. Current results of Center investigations into shipboard use of GRP pipe, fittings and joints are providing the performance criteria necessary to develop a military specification for naval shipboard service. This specification will ensure required characteristics for naval applications and also will provide a standard for such agencies as the U.S. Coast Guard, the Maritime Administration and the American Bureau of Shipping for commercial applications in U.S. merchant vessels.

  • Publication Date: 1978-5

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  • Accession Number: 00178125
  • Record Type: Publication
  • Source Agency: Department of the Navy
  • Files: TRIS
  • Created Date: Jul 19 1978 12:00AM