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G10 Filament Wound Fiberglass Tube

G10 Filament Wound Fiberglass Tube is crafted by wet‑rolling glass rovings with epoxy resin into seamless tubes, delivering superior mechanical integrity, reliable Class H (180 °C) insulation, and minimal moisture uptake for critical electrical and structural applications.

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Product Details

G10 Filament Wound Fiberglass Tube is manufactured by continuously winding alkali‑free E‑glass yarns, impregnated with a heat‑curable epoxy resin, around a mandrel under controlled tension, followed by high‑temperature curing to form a seamless laminate. This process yields tubes with uniform wall thickness, void‑free structure, and exceptional dimensional stability. The material demonstrates minimal dielectric loss at 50 Hz (≤0.05) and maintains over 50 % of its flexural strength after 24 h immersion in transformer oil at 90 ± 2 °C. Resistant to SF₆, oils, and common industrial chemicals, it ensures long‑term performance in harsh environments without deformation or delamination.

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Product Parameters

Standard

IEC61212-3

NEMALI-1

DIN 7735

MIL-I-24768

Density

1.9 g/cm³ (typical)

Water Absorption

≤ 0.5 % (24 h immersion)

Flexural Strength

≥ 360 MPa

Maximum Operating Temperature

180 °C (Class H)

Dielectric Strength

≥ 14.5 kV/mm

Product Advantages

Consistent Structural Uniformity

Seamless filament winding prevents voids and ensures homogeneous strength throughout the tube’s length.

Minimal Dielectric Loss

Low dissipation factor (≤ 0.05 at 50 Hz) maintains electrical efficiency in high‑frequency or high‑voltage systems.

Chemical & Oil Resistance

Unaffected by transformer oil, SF₆ gas, and most acids/alkalis, guaranteeing stable insulation in chemical‑exposed applications.

Product Applications

Dry‑Type Transformer Barriers

Used as spacers and insulation sleeves to prevent phase-to-phase or phase-to-ground faults in Class H dry transformers.
Motor Winding Supports

Provides robust structural insulation in stator and rotor assemblies, enhancing mechanical stability and dielectric separation.
High‑Voltage Bushing Liners

Serves as insulating liners in switchgear and circuit breaker bushings, ensuring precise voltage grading under load.

FAQ

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What is the average delivery time?

Delivery times vary based on the quantity and specifications of the order. Typically, delivery can take anywhere from 3 to 30 days. For more precise information, please contact us directly via email or WhatsApp.