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Industrial Use of FRP Marine Composites Tanks FRP storage tanks are gaining increased attention as of late due to recent revelations that their metallic counterparts are corroding and rupturing in underground installations. The fact that this activity can go unnoticed for some time can lead to severe environmental ramifications. Construction A cross-sectional view of a typical FRP tank would closely resemble the pipe described in the previous section with a barrier inner skin followed by the primary reinforcing element. Figure 1-46 shows the typical construction of an FRP tank. A general limit for design strain and National Institute of Standards and Technology (NIST) for contact molded tanks. Hoop tensile modulii 6 (psi) range from 2.0 x 10to 4.3 x level is 0.001inch according to ASTM for filament wound tanks inch 106 for filament winding and 1.0 x 106 to 1.2 x 106 for contact molding. Figure 1-46 Cross-Sectional View of Standard Vertical Tank Wall Laminate [Cheremisinoff, Fiberglass-Reinforced Plastics Deskbook] Application FRP is used for vertical tanks when the material to be stored creates a corrosion problem for conventional steel tanks. Designs vary primarily in the bottom sections to meet drainage and strength requirements. Horizontal tanks are usually used for underground storage of fuel oils. Owens-Corning has fabricated 48,000 gallon tanks for this purpose that require no heating provision when buried below the frost line. Air Handling Equipment FRP blower fans offer protection against corrosive fumes and gases. The ease of moldability associated with FRP fan blades enables the designer to specify an optimum shape. An overall reduction in component weight makes installation easier. In addition to axial fans, various types of centrifugal fans are fabricated of FRP. Ductwork and stacks are also fabricated of FRP when corrosion resistance and installation ease are of paramount concern. Stacks are generally fabricated using hand lay-up techniques employing some type of fire-retardant resin. 54PDF Image | Marine Componsites
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