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Help CenterG10, FR4, G11 Filament Wound Fiberglass Tube
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Description
Nema Grade G10 FR4 G11 Filament Wound Fiberglass Tubes are made of Fiberglass Filament and binded with epoxy resin, cast to specific sizes, and then molded or ground to desired specifications.
G10 FR4 G11 tubes also have excellent chemical and electrical resistance under dry and wet conditions.They also exhibit high flexural, impact resistance, excellent mechanical and bonding strength at temperatures up to 130℃/155℃/180℃.
Suitable for being used as insulation structural parts of mechanical, electrical and electronic equipment. Applications include mast, heat exchanger, coil and inductor. The G10 fiberglass tube is ideal for spacers and standoffs.
Features
High mechanical strength with excellent flexural and te
The heat resistance grade B, F, H can be selected.nsile properties
Minimal dielectric loss (≤ 0.05 at 50 Hz)
Excellent dimensional stability with uniform wall thickness
Low moisture absorption and resistance to environmental humidity
Maintains over 50% of flexural strength after 24 h immersion in transformer oil at 90 ± 2 °C
Chemical resistance: compatible with SF₆, transformer oils, and common industrial chemicals
Seamless filament-wound construction ensures long-term durability without delamination
Applications
Insulating structural components in high-voltage electrical equipment
Support and insulation parts for transformers, switchgear, and reactors
Compact electrical insulation components in industrial and power distribution systems
Components exposed to transformer oil, SF₆, or humid environments
High-performance mechanical and electrical insulation applications requiring long-term dimensional stability
| G10, FR4, G11 Filament Wound Fiberglass Tube | |||
| Testing Items | Test method | Unit | Values |
| Physical properties | |||
| Density | IEC 60893-2 8.1 | g/cm³ | 1.85-2.00 |
| Water absorption | IEC 60893-2 8.2 | % | ≤ 0.5 |
| Mechanical properties | |||
| Tensile strength | IEC 60893-2 5.7 | Mpa | ≥400 |
| Flexural Strength(perpendicular) | IEC 60893-2 5.1 | ≥650 | |
| Compressive strength parallel | IEC 60893-2 5.3 | ≥ 290 | |
| Compressive strength perpendicular | ≥200 | ||
| Shearing strength | IEC 60893-2 5.6 | ≥ 89.7 | |
| Impact strength(Charpy) | IEC 60893-2 5.5 | Kj/m2 | ≥ 475 |
| Electrical properties | |||
| Volume Resistivity | IEC 60089 | Ω·m | ≥1.0 x 10^12 |
| Surface Resistivity | Ω | ≥ 1.0×10^14 | |
| Electric strength perpendicular to lamination (90℃ in oil) | IEC 60893-2 6.1.2 | kV/mm | ≥ 10.0 |
| Breakdown Voltage parallel to lamination | KV | ≥ 45 | |
| Arc Resistance | IEC 61621:1997 | Sec. | ≥ 180 |
| Thermal properties | |||
| Coefficient of Thermal Expansion | ASTME 228-11 | 1/K | ≤2×10-5 |
| coefficient of heat conduction | GB/T 10297-1998 | W/(m2×K) | ≤10.79 |
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