G3 Glass Phenolic Tubes are high-performance insulation and structural components designed for demanding electrical and industrial applications. Made from woven glass fabric impregnated with phenolic resin, these tubes combine superior mechanical strength, excellent electrical insulation, and high heat resistance. They are engineered to perform reliably under extreme temperatures, mechanical stress, and harsh environmental conditions.
YILONG
Phenolic Resin + Glassfiber Cloth
Reddish Brown
10-200mm
1000mm
180
H
HB
Pallet, Wooden Box
High mechanical strength and structural integrity
Excellent electrical insulation with strong dielectric properties
Heat resistant, stable from -40°C to 180°C
Chemical, corrosion, and oxidation resistant
Long-lasting durability in industrial environments
● Electrical insulation in transformers, motors, and electrical connectors
● Structural components in industrial machinery
● Applications requiring high-strength, heat- and chemical-resistant insulation
● Environments exposed to mechanical stress, heat, and industrial chemicals
| Test / Property | Unit | G-3 |
| PHYSICAL | ||
| Density | g/cm³ | 1.8 |
| Water Absorption, 24 hrs | % | 2.65 |
| MECHANICAL | ||
| Tensile Strength – lengthwise | MPa | 289 |
| Tensile Strength – crosswise | MPa | 234 |
| Flexural Strength – lengthwise | MPa | 279 |
| Flexural Strength – crosswise | MPa | 234 |
| Flexural Modulus – lengthwise | GPa | 12.4 |
| Flexural Modulus – crosswise | GPa | 9.7 |
| Izod Notched Impact – lengthwise | kJ/m² | 0.64 |
| Izod Notched Impact – crosswise | kJ/m² | 0.59 |
| Compressive Strength | MPa | 379 |
| Hardness, Rockwell M | — | 110 |
| THERMAL | ||
| Coefficient of Linear Thermal Expansion – lengthwise | 10⁻⁶ / °C | 1.46 |
| Coefficient of Linear Thermal Expansion – crosswise | 10⁻⁶ / °C | 1.76 |
| Max Operating Temperature | °C | 180 |
| Thermal Class | / | H |
| Flammability Rating | UL94 | HB |
| Thermal Conductivity | W/m·K | 0.29 |
| ELECTRICAL | ||
| Dielectric Strength (short time, 1/8" thick) | kV/mm | 18.1 |
| Dielectric Constant at 1 MHz | — | 7.3 |
| Dissipation Factor at 1 MHz | — | 0.023 |
| Arc Resistance | s | 180 |
Yes, based on drawings or samples.
UL, RoHS, REACH, CE, ISO, etc.
Usually 100 kg or 100 sheets, negotiable.
Yes, common samples free, buyer pays freight.
2-4 weeks after payment.
Yes, including labeling and packaging.
Yes, over 20 years.
T/T 30% deposit, 70% before shipment. Negotiable if supports needed.
Yes, we offer CNC machining.
Manufacturer and Exporter
No.3, Mianzhi Street, Zhucheng, Shandong, China
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