Properly designed and fabricated Fiberglass Reinforced Plastic (FRP) has been used in the construction of corrosion resistant equipment since the early 1950’s and is the preferred material of construction for a wide variety of corrosive applications including Hydrochloric Acid (HCl), Sulfuric Acid (H2SO4), Bleach (NaOCl), Caustic (NaOH), Ferric Chloride (FeCl3) and Alum.
Fiberglass reinforced plastic (FRP) has been used to fabricate many different types of process equipment for severely corrosive applications in the chemical process industry, the pulp and paper industry, and the power and mining industry.  Properly designed and fabricated, FRP can be used to construct storage tanks, scrubbers, hoods, duct, piping and many other unique, one of a kind process applications.
The critical part of any FRP laminate is the corrosion barrier.  Industry standards call for the corrosion barrier to be a minimum 100 mils thickness constructed using a V,2M laminate sequence.  Selection of a competent, capable, experienced FRP fabricator is the essential first step to assure that the finished product meets or exceeds expectations.  Next, since it is the resin that provides the required corrosion resistance, is the selection of the one, best resin system for the application. Finally, the proper veils and other fiberglass reinforcing materials must be evaluated and selected.


Information regarding the selection of high performance, corrosion resistant  Hetron, Vipel, Dion, CoRezyn, and Derakane vinylester, polyester, and isophthalic resins is available on line.


Additionally, since a composite structure is a designed and engineered product, the intended service environment/process in which the composite structure will be utilized must be  fully understood with attention to design pressure and temperature etc, required by the specifier. This calculator may prove useful.

  • Exceptional service life expectancy in excess of 20 years
  • Highly resistant to a wide range Acids, Caustics, Chlorides, Solvents and Oxidizers
  • Wide design Delta-T range (up to 450F max)
  • Will not rust, crack, chip, peel or rot
  • Minimal maintenance cost.  Inexpensive to repair/refurbish/modify
  • Higher strength to weight ratio than steel
  • Light weight
  • Does not require cathodic protection
  • Non-conductive but can be made electrically conductive
  • Easy to field modify/repair

  • Higher service temperature
  • Higher external ambient temperature
  • Stronger, more rigid but light weight

 Fiberglass Reinforced Plastic duct (FRP duct) is fiberglass duct which is fabricated using  two chemically inert materials -- glass and premium grade resin. The finished product can be relied upon for longer term service than other ducting products such as aluminum, stainless steel or coated metal in applications ranging from industrial foul air ventilation and corrosive environments to underground and exhaust ductwork systems.

FRP duct is stronger and far superior to light gauge steel and aluminum, yet it is lighter than steel, offers superior acoustical qualities, equal air flow performance, and provides resistance to corrosion due to soil conditions or moisture. Other advantages include the compatibility and versatility of FRP fittings when used with FRP ducting.