Fiberglass Wound Tube VS FRP (Fiberglass Reinforced Plastic) Pipe

Time: 11-20 2025 Auther: Xujue Electrical

Fiberglass-reinforced products are widely used in power equipment manufacturing, industrial pipeline engineering, and...

Fiberglass-reinforced products are widely used in power equipment manufacturing, industrial pipeline engineering, and the composite-materials sector. Although Fiberglass Wound Tubes and FRP/GRP Pipes both belong to fiberglass composite materials, they differ significantly in structure, mechanical properties, electrical characteristics, and application scenarios.

To help engineers, purchasers, and technical users choose the right product quickly, this article provides a comprehensive comparison.

I. Definition Differences

Fiberglass Wound Tube

Manufactured by continuous filament winding (cross-angle + hoop winding) followed by resin impregnation and curing.
Features: High structural precision and high strength; suitable for electrical-insulation components.

Fiberglass Wound Tubes

FRP Pipe (FRP / GRP Pipe)

Typically produced by filament winding, centrifugal casting, or pultrusion, and mainly used in water transmission, chemical pipelines, gas transport, etc.
Features: Focuses on corrosion resistance and mechanical performance for pipeline applications; not primarily designed for high electrical performance.

FRP Pipe

II. Performance Comparison Table (Ideal for product pages)

Indicator	Fiberglass Wound Tube	FRP Pipe
Structure Method	Precisely oriented continuous winding, accurate fiber distribution	Winding/spraying/centrifugal molding, more random fiber orientation
Mechanical Strength	Higher strength—especially axial & hoop strength	High strength but mainly for pipeline pressure requirements
Dimensional Accuracy	High precision: ±0.1–0.3 mm	Relatively lower precision
Electrical Insulation Performance	Excellent (high dielectric strength)	General; not specifically for electrical insulation
Corrosion Resistance	Good	Excellent (used in chemical and seawater pipelines)
Heat Resistance	Stable; suitable for electrical equipment	Varies depending on resin system
Water Absorption	Very low	Slightly higher
Weight	Light	Light
Common Applications	Lightning arrester housings, transformer insulating supports, electrical insulation parts	Water transmission, chemical pipelines, sewage systems, underground pipe networks
Customizable Electrical Properties	Yes	No

III. Key Difference Summary (One-Sentence Version)

Fiberglass Wound Tubes focus on electrical insulation and high strength precision; FRP Pipes focus on corrosion resistance and pressure performance for engineering pipelines.

IV. Differences in Power-Industry Applications

Fiberglass Wound Tube

Used for lightning-arrester housings, insulating pull rods, and high-voltage equipment structural components.
Requires electrical strength ≥ 18–25 kV/mm.

FRP Pipe

Rarely used directly in high-voltage insulation due to less stable electrical properties and higher water absorption.

V. Selection Recommendations

Choose Fiberglass Wound Tube if your application involves:
✔ Lightning arresters
✔ Switchgear
✔ Transformers
✔ Insulation supports

Choose FRP Pipe if your application involves:
✔ Chemical pipelines
✔ Water supply & drainage
✔ Seawater desalination
✔ Engineering transmission pipelines

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