Epoxy fiberglass tubing manufactured to NEMA grade standards combines high mechanical strength with reliable electrical insulation in demanding industrial environments. We produce precision NEMA G10 epoxy fiberglass tube for electrical insulation using continuous filament-wound or convolute-wound processes that tightly control wall thickness and resin distribution. The base material is a woven or continuous glass fiber reinforcement impregnated with a flame-retardant epoxy resin system, cured under heat and pressure to achieve a void-free laminate. It meets NEMA G10 requirements for flexural strength, dielectric strength, and moisture resistance. As a certified NEMA G10 tube manufacturer, we maintain inventory of standard sizes and offer rapid custom production for G10 FRP tube for high voltage switchgear, bus supports, and transformer applications. The same resin system is also adapted for fiberglass epoxy tube for oil drilling downhole tools, where crush resistance, dimensional stability, and chemical resistance are critical. Fabrication options include precision grinding, slotting, threading, and color coding to match OEM specifications.
| Property | Standard Value | Unit |
|---|---|---|
| Inside Diameter | 0.125 – 6.000 | inch (3.18 – 152.4 mm) |
| Outside Diameter | 0.250 – 7.000 | inch (6.35 – 177.8 mm) |
| Length | 36, 48, 60, 72 | inch (custom lengths available) |
| Wall Thickness | 0.031 – 1.000 | inch (0.79 – 25.4 mm) |
| Dielectric Strength (short time) | 200 – 400 | V/mil |
| Insulation Class | F (155°C) / H (180°C) | — |
| Water Absorption (24 hr) | ≤ 0.10 | % |
| Flexural Strength (lengthwise) | ≥ 50,000 | psi |
| Compressive Strength (axial) | ≥ 35,000 | psi |
| Density | 1.85 – 2.00 | g/cm³ |
| Color | Natural green, yellow, black | — |
Our NEMA Grade Epoxy Fiberglass Tubing is recognized for dimensional stability under thermal cycling and resistance to oils, solvents, and moisture. The filament-wound construction delivers uniform wall thickness and high hoop strength, making it suitable for high-stress mechanical and electrical environments. Typical applications include standoff insulators, coil forms, fuse bodies, arc barriers, and structural spacers in both AC and DC systems. We maintain tight tolerances on concentricity and surface finish to reduce machining time and improve assembly reliability. Each production lot is tested for dielectric breakdown, water absorption, and flexural strength, with full material traceability and test reports available upon request. Custom fabrication capabilities include tapered ends, counterbores, flanges, threaded inserts, and machined slots to match OEM drawings. For specialty projects, we also offer post-curing and surface sealing treatments that further reduce moisture uptake in high-humidity or immersion service.
