Engineered Filament-Wound Epoxy Glass Tubing
Wound to a fiber angle set by your load path, then machined to shape. Filament winding lets us place glass where the load is. We set the wind angle from your pressure or column load, then machine the tube to casing, bushing or structural shape. Send the load case, ID/OD, length, temperature and any flame class. We return the winding schedule and a manufacturability review before quotation. From th
Wound to a fiber angle set by your load path, then machined to shape. Filament winding lets us place glass where the load is. We set the wind angle from your pressure or column load, then machine the tube to casing, bushing or structural shape. Send the load case, ID/OD, length, temperature and any flame class. We return the winding schedule and a manufacturability review before quotation. From th
Technical specifications
| Material | Epoxy-impregnated E-glass / ECR |
| Temp class | F/H, up to ~155-180 degC |
| Dielectric | >14 kV/mm through thickness |
| Wind angle | Set from load path |
| Flame | UL 94 V-0 on FR-4 grade |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Applications by industry
- MV/HV bushing core and insulating bodies
- Transformer lead-out tubes with mechanical load
- Insulator structures where glass strength is required
- Air-core reactor and coil insulating tubes
- Switchgear interphase and barrier tubes
- Engineered tube stock with tuned winding angle
Why filament-wound epoxy glass for this application
Epoxy resin over oriented glass gives the highest strength-to-weight dielectric tube for bodies that must hold conductors or bushings under mechanical and temperature load together.
Confirm resin cure, temperature class and CTI; wound angle and void control decide both the kV withstand and the mechanical rating.
Standards: ASTM D709, IEC 60672, IEC 60137 (bushing core).
Feature and remaining-wall review
Diamond-coated tools for clean edges; CNC turning, grinding and drilling to drawing. Dimensional stability excellent with controlled moisture content. Review feature depth, edge distance and remaining wall against critical geometries. Capability is confirmed on your drawing, not from a blanket tolerance.
Inspection and traceability
We state the control plan with you. Batch traceability links raw material lot to finished part.
- First-article inspection (FAI) per your plan
- In-process dimensional checks at every station
- Batch certificate of conformance (COA) supplied on request
- Lot traceability to incoming material certificate
- Dielectric strength and insulation resistance testing available on request
Related components
Filament Fiberglass Wound Tubing
Related insulation component from the WELLELE catalog.
Shaped HV Casing Parts (FR-4/G10)
Related insulation component from the WELLELE catalog.
PV Insert Epoxy Fiberglass Tubes
Related insulation component from the WELLELE catalog.
Common questions
What voltage class can epoxy glass handle?
Dielectric strength ≥ 20 kV/mm. Voltage rating depends on thickness, geometry and safety factor — your drawing determines the insulation level.
Can epoxy glass be machined to tight tolerances?
Yes. We hold ±0.05 mm on ID/OD with CNC turning and grinding using diamond-coated tools to avoid delamination.
Is epoxy glass arc-resistant?
It has good arc resistance but is not arc-quenching. For direct arc contact, pair with ceramic-filled or synthetic arc-quenching composites.
What certifications do you provide?
Material COA, batch traceability, first-article and final inspection per your plan. Certificates comply with RoHS and REACH on request.
How do you choose the wind angle?
Material COA, batch traceability, first-article and final inspection per your plan. Certificates comply with RoHS and REACH on request.
Engineering Guides & Selection Notes
Related technical articles that help specify this product.
Get pricing for Engineered Filament-Wound Epoxy Glass Tubing
Attach the drawing with annual volume. We check the material against your duty and tolerance, verify ID / OD / wall / features, and respond with manufacturability notes and pricing.