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Sodium Hypochlorite is one of the most aggressive chemical environments handled in Fiberglass Reinforced Plastic (FRP) Equipment. Resin selection, cure system, surfacing veil materials, and laminate construction details are critical elements that determine service life. Similarly, all are meaningless without the expertise, consistency, and quality assurance of an experienced and qualified equipment manufacturer.
FRP Chemical Storage Tanks has been developed to assist the specifier and the buyer in detailing their own specification for equipment that meets the minimum design parameters and construction elements necessary in FRP tank manufacture. While primarily written for atmospheric, vertical, cylindrical tanks, many of the design parameters are applicable for any style or design tank. Other bulletins specifically address the design considerations necessary...
The inner surface exposed to the chemical environment shall be a resin-rich layer 0.010 to 0.020 inches thick, reinforced with a suitable chemical-resistant glass fiber surface (C-GLASS) or with a (SYNTHETIC) organic fiber surface mat.
The interior layer shall be followed with a layer composed of resin, reinforced only with noncontinuous glass-fiber strands (CHOPPED STRAND) applied in a minimum total of 3 oz/ft The combined thickness of the inner surface and interior layer shall not be less than 100 mils.
Filament Wound Structural Layer - Subsequent reinforcement shall be continuous-strand roving.
Subsequent reinforcement shall be comprised of 1.5 oz/ft2 chopped strand mat or equivalent weight of chopped mat, or shall be comprised of chopped strand mat or chopped mat and such additional number of alternating plies of 24 oz/yd2 woven roving to a thickness as required to meet the physical properties that are used for the design.