Filament Fiberglass Wound Tubing, Custom ID/OD and Wall
Standard and custom-wound fiberglass tubing for insulation and structure. Wound fiberglass tubing is our baseline epoxy glass product: consistent wall, low voids and good dielectric. We supply standard sizes and wind to your custom ID/OD and wall. Surfaces are finished for bonding or painting, and cut ends are squared for assembly. Both. We keep common IDs in stock and wind custom wall and diamete
Standard and custom-wound fiberglass tubing for insulation and structure. Wound fiberglass tubing is our baseline epoxy glass product: consistent wall, low voids and good dielectric. We supply standard sizes and wind to your custom ID/OD and wall. Surfaces are finished for bonding or painting, and cut ends are squared for assembly. Both. We keep common IDs in stock and wind custom wall and diamete
Technical specifications
| Material | Epoxy glass filament wound |
| Wall | Custom, low void |
| Finish | Bondable, squared ends |
| Standard | ASTM D2583 (G10), IPC-4101 (FR-4), IEC 60672 (thermal). |
| Operating temperature | -40 °C to +130 °C |
| Dielectric strength | ≥ 20 kV/mm (per ASTM test method) |
💾 Datasheets & Test Reports
Download the technical data sheet for this product (PDF).
Information required for quotation
| Base tube | Approved material grade, ID, OD, wall and conditioning as per drawing |
| Datums | Drawing datum scheme and measurement reference |
| Key dimensions | Feature positions, depths, pitch and diameters reviewed before quotation |
| Thread / profile | Standard or custom profile, class, depth, engagement and gage method |
| Other features | Holes, slots, steps, chamfers, cuts and marking |
| Acceptance | Tolerances, sampling, gages, FAI and inspection report |
| Order | Prototype and production quantity, packaging and delivery target |
Applications by industry
- High-strength structural insulator tubes (MV/HV bushings)
- Transformer and reactor winding support tubes
- Dry-type transformer coil wind supports
- Insulator and bushing bodies with high hoop strength
- Aerospace and defence structural dielectric tubing
- Roll-wrapped tube stock with custom ID/OD and wall
Why filament-wound epoxy fiberglass for this application
Filament winding orients continuous glass strands to give hoop and axial strength a roll-wrapped tube can't, making these the choice where a bushing or winding tube must carry load as well as insulate.
Confirm winding angle and wall against the axial/hoop load and voltage; orientation is load-engineering, not cosmetic. ID/OD tolerance depends on mandrel and cure control.
Standards: ASTM D709 / D2343 (glass reinforcement), IEC 60672, UL 94 V-0.
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-Wound Epoxy Tubing
Related insulation component from the WELLELE catalog.
Current-Limiting Fuse Tubes
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ECR Epoxy Fiberglass Rods
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.
Standard sizes or custom only?
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 Filament Fiberglass Wound Tubing, Custom ID/OD and Wall
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.