Import Epoxy Glass Fiber Winding Tube — Buy in wholesale FOB from Supplier in China

Ztelec Group supplies an epoxy glass fiber winding tube, designated EPCF52, produced by winding glass fibre yarn impregnated with an epoxy‑based insulation jelly and curing the assembly through a wet‑lay and bake process. The tube achieves a Class H heat‑resistance rating and is designed to resist chemical attack from SF₆, offering low dielectric loss and stable dimensional performance. Technical data list a density of 1.85 - 2.00 g cm‑3, vertical bending strength of 400 MPa and axial compressive strength of at least 150 MPa. The product complies with IEC 61212‑1:2006 and the Chinese standard GB/T 5132.1‑2009.

In the transformer industry, such winding tubes are valued for their high electrical strength, with a parallel breakdown voltage of 40 kV in transformer oil and a vertical electrical strength of 11.6 kV mm‑1. Dielectric loss at 50 Hz is typically ≤0.05, and water absorption does not exceed 1 %, ensuring reliable performance in humid service conditions. Typical outer diameters for epoxy glass winding tubes range from 10 mm to 200 mm, with wall thicknesses between 1 mm and 10 mm, allowing flexibility in winding designs. The tube’s temperature index of 180 °C indicates suitability for high‑temperature transformer applications.

Primary users include manufacturers of H‑grade dry‑type transformers, load‑tap changers, electric reactors, lightning arrestors and SF₆ inductors. Importers should request the exact dimensions, packaging details and confirmed lead‑time, as the listing does not provide MOQ or price information. Verification of IEC‑61212 compliance, test reports for partial discharge (≤5 pC) and insulation resistance (≥1 × 10⁹ Ω) is recommended before contract. Payment terms, shipping incoterms and any required export licences need to be clarified with Ztelec Group directly.

Ztelec Group operates from No.279 Third West Ring, Zhengzhou, Henan 450000, China and is recorded under the harbor trust tier, reflecting basic verification of its business credentials. The profile indicates a response rate of 0 % and an average response time of 0 hours, so prospective buyers may need to initiate contact proactively. In addition to winding tubes, the company offers epoxy‑glass sheet products for a range of electrical insulation needs.

The listing does not disclose production capacity, annual turnover or specific client references, therefore buyers should request detailed technical data sheets, quality management certificates and examples of prior projects. Confirming the supplier’s compliance with IEC 61212 and obtaining material safety data sheets will help assess suitability. All statements are derived from the supplier’s own description and public address information.