You are here: Home » Product » Tubes » Epoxy Glass Tubes » G11-H Grade Glass Epoxy Tubes

G11-H Grade Glass Epoxy Tubes

G11 high-temperature Class H (180 °C) epoxy glass tube featuring continuous filament winding for uniform strength, excellent dielectric performance, and low moisture uptake, ideal for compact electrical insulation applications.

Quantity:
Availability:





Inquire Add to Basket

Product Details

G11-H Tubes are produced by wet-winding E-glass rovings around a mandrel, impregnating them with a high-performance epoxy resin, and curing under controlled heat and pressure to form seamless tubes. This manufacturing process yields a laminate with exceptional flexural and tensile strengths, minimal dielectric loss, and resistance to chemical attack. The tubes maintain at least 50% of their room-temperature flexural strength when exposed to transformer oil at 90 ± 2 °C, ensuring reliable insulation in power distribution equipment. Available in wall thicknesses from 0.5 mm to 25 mm and customizable diameters, they can be tailored to precise engineering specifications.

Get a Quote

Product Parameters

Standard

IEC61212-3

NEMALI-1

DIN 7735

MIL-I-24768

Density

1.9 g/cm³ (typical)

Water Absorption

≤ 0.5% (24 h immersion)

Tensile Strength

≥ 320 MPa

Maximum Operating Temperature

180 °C (Class H)

Dielectric Strength

≥ 14.5 kV/mm (perpendicular)

Product Advantages

Uniform Structural Integrity

Continuous filament winding ensures seamless, void-free tubes with consistent mechanical properties.

Low Dielectric Loss

Optimized epoxy formulation delivers minimal power loss in high-frequency and high-voltage applications.

Chemical and Oil Resistance

Maintains insulation performance in transformer oil and against common industrial chemicals.

Product Applications

Dry-Type Transformer Insulation

Serves as structural spacers and barriers within Class H dry-type transformers, enhancing thermal and electrical reliability.
Motor Stator Support

Used as support tubes for motor winding assemblies, providing mechanical stability and dielectric separation in compact designs.
High-Voltage Bushing Sleeves

Acts as insulating sleeves in bushings for switchgear and circuit breakers, ensuring safe voltage grading under load.

FAQ

What is the minimum order quantity?

The minimum order quantity depends on the specific product you are interested in. For detailed information, please contact us directly via email or WhatsApp.
What is the price of this product?

The price of our products varies depending on the quantity, size, and specifications. For an accurate quote, please reach out to us via email or WhatsApp, and we'll provide you with the best options tailored to your needs.
What is the average delivery time?

Delivery times vary based on the quantity and specifications of the order. Typically, delivery can take anywhere from 3 to 30 days. For more precise information, please contact us directly via email or WhatsApp.