Import Glass Fiber Insulation Tubes — Buy in wholesale FOB from Supplier in China

Ztelec Group supplies glass fiber insulation tubes that are laminated with various resin systems such as phenolic paper, phenolic cloth, epoxy, silicone, bismaleimide and polyester imide. The product line includes tubes classified from Class E to Class H, for example EPFC21/22 (Class B/F) and EPCF52 (Class H). Each tube is manufactured by wet winding of glass fiber yarn impregnated with resin, followed by drying and baking to achieve the final consolidated form. The catalogue lists both circular and non‑circular sections, including square and oval tubes, identified as type 3520.

The resin systems give the tubes typical heat‑resistance levels up to 260 °C for Class H grades, and dielectric loss factors below 0.001 at 50 Hz. In the industry, epoxy‑glass tubes are favoured for their combination of mechanical strength, chemical resistance to SF6 and low moisture absorption. Typical tensile strength for epoxy‑glass tubes ranges from 120 MPa to 150 MPa, while phenolic‑based tubes often reach 100 MPa. Standard dimensions offered by manufacturers are outer diameters from 6 mm to 25 mm with wall thicknesses of 0.5 mm to 2 mm, supplied in lengths of 1 m or 3 m.

These tubes are used as insulation components in dry‑type transformers, load tap changers, reactors, lightning arrestors and SF6 inductors, as well as support structures in motor windings. Buyers typically include transformer manufacturers and electrical equipment OEMs who require high dielectric strength and dimensional stability. Ztelec Group ships the tubes in wooden crates or bulk pallets, with packaging details to be confirmed per order. Prospective importers should verify the exact class, dimensional tolerances and any required certifications directly with the supplier.

Ztelec Group is located at No.279 Third West Ring, Zhengzhou, Henan 450000, China. The supplier is listed with a harbor trust tier on the platform and currently shows a response rate of 0 % with an average response time of 0 hours. Its profile does not provide additional operational details beyond the address and trust tier. The company is presented as a manufacturer of specialised laminated glass fiber tubes for electrical applications.

The product entry specifies a broad selection of tube types, including phenolic paper‑base, phenolic cloth‑base, epoxy, silicone, bismaleimide and polyester imide laminates. No further information on production capacity, minimum order quantity or lead time is disclosed, so interested buyers need to request those details directly from Ztelec Group.