Troy Dualam Inc. engineers and shop-fabricates custom Fiberglass Reinforced Plastic (FRP) and Dual Laminate piping systems for heavy industrial and chemical processing environments. From standard process spools to complex distribution headers, elbows, manifolds, and ducting, every system is built to documented process chemistry, temperature, pressure, and vacuum requirements.

Applications span chemical processing, chlor-alkali production, pulp and paper bleach plants, mineral processing, flue gas desulfurization (FGD), and industrial wastewater treatment where aggressive corrosion requires reliable fluid handling.

Manufacturing Scope and Sizing

  • Diameter range: Fabricated from 1-inch diameter up to 60-inch+ industrial headers, spools, manifolds, and ducting.
  • Fittings and components: Custom spools, segmented and molded elbows, reducing tees, concentric and eccentric reducers, Van Stone / stub-end flanged joints, and fixed FRP flanges.
  • Pressure and vacuum regimes: Designed across standard pressure classes (25, 50, 75, 100, and 150 psi matching ASME B16.5 bolt circles) and engineered full-vacuum process lines.
  • Codes and standards: Engineered to ASTM D2996, ASTM D2997, ASTM D3982, and ASME B31.3 Chapter X (non-metallic piping systems). Note: ASME RTP-1 applies to shop-fabricated vessels and tanks; piping is engineered to non-metallic piping codes.

Solid FRP vs. Dual Laminate Construction

Material selection is governed by operating chemistry, chemical concentration, thermal cycling, and permeation risks:

  • Solid FRP piping: Built with premium vinyl ester resins (Derakane 411, Derakane 470 novolac for high-temperature solvents/oxidizers, and Derakane 510-series for flame retardance). Constructed with a heavy resin-rich corrosion barrier featuring synthetic Nexus veils and chopped strand mat before structural reinforcement.
  • Dual laminate piping: Combines a thermo-welded thermoplastic or fluoropolymer liner with an external filament-wound or contact-molded FRP structural shell for severe service:
    • Polypropylene (PP): Hot acid leach and pickling applications.
    • PVC / CPVC (Corzan): Chlor-alkali, hypochlorite, and general acid/base services.
    • PVDF (Kynar): Strong mineral acids, wet chlorine, and halogen service.
    • ECTFE (Halar) & PFA/FEP: Extreme chemical inertness and superior permeation resistance at elevated temperatures.

Quality Control and Liner Testing

  • 100% spark testing: All thermoplastic and fluoropolymer liner weld seams are spark-tested (holiday tested) to verify zero defects prior to external structural fiberglass lamination.
  • Dimensional inspection: Exact spool face-to-face dimensions, flange angular alignment, and bolt hole orientation verified before shipment to ensure smooth field installation.
  • Hydrostatic pressure testing: Shop proof and pressure testing executed per project specifications and engineering quality standards.

Engineering Scope and Field Services

Troy Dualam Inc. handles all engineering calculations, resin selection, and shop spool fabrication at its Elizabethtown, Ontario facility. Field installation, tie-ins, flanged spool fit-up, and on-site emergency repairs are provided or overseen by Troy Dualam Services under a separate, project-specific scope.

Frequently Asked Questions

What diameter piping systems can Troy Dualam manufacture?

Troy Dualam manufactures custom FRP and dual laminate piping from 1 inch up to 60 inches and larger for custom headers, distribution manifolds, and chemical ducting.

What is the difference between solid FRP and dual laminate piping?

Solid FRP piping uses premium vinyl ester resin throughout the structural wall and corrosion barrier. Dual laminate piping utilizes a thermo-welded thermoplastic or fluoropolymer liner (such as PVDF, ECTFE, PP, or CPVC) backed by structural FRP, providing superior permeation resistance against extreme chemical attack.

What design standards apply to industrial FRP piping?

Piping systems are engineered to ASTM D2996, ASTM D2997, ASTM D3982, and ASME B31.3 Chapter X (non-metallic piping). ASME RTP-1 certification applies specifically to vessels and tanks, not piping.

Discuss your industrial piping project with our engineering team. Contact Troy Dualam.