The FRP Phenolic Aldehyde Flange is a high-performance composite flange manufactured from phenolic resin reinforced with fiberglass. Unlike standard polyester or vinyl ester FRP flanges, the phenolic aldehyde system provides exceptional fire resistance, low smoke generation, and minimal toxic gas emission when exposed to flame. This flange meets stringent fire safety standards including ASTM E84 Class 1, UL94 V-0, and BS 476 Part 7.
In addition to fire safety, the cross-linked phenolic structure offers outstanding resistance to polar solvents, ketones, esters, and concentrated acids – chemicals that quickly degrade conventional FRP flanges. The flange maintains structural integrity from -40°C to 150°C depending on formulation. Available with ANSI, DIN, or JIS drilling patterns, and compatible with phenolic FRP pipes, ductwork, and fittings. Typical bolt torque ratings and gasket surface finishes follow ASME B16.5 guidelines.
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Product Advantages
Inherent Fire Retardancy (UL94 V-0)
Self-extinguishing; no flame spread without halogenated additives.
Low Smoke & Low Toxicity
Minimal smoke density (ASTM E662) – critical for enclosed spaces like tunnels and ships.
Superior Solvent Resistance
Resists acetone, toluene, MEK, ethyl acetate, and chlorinated solvents.
High Temperature Capability
Continuous service up to 150°C (302°F) – outperforms standard vinyl ester FRP flanges.
Non-Corrosive & Lightweight
70% lighter than steel; immune to rust, galvanic, and crevice corrosion.
No Post-Curing or Coating
Ready to install; no need for intumescent paints or fireproofing wraps.
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