Wholesale High Temperature Resistance 550° Flame Retardant Fiberglass Sleeve

PART NO.	INNER DIAMETER/mm	THICKNESS	ROLL LENGTH/m	Wrap m/ctn
ZDGF-S-010	10	0.8	50	100
ZDGF--S-012	12	10	50	100
ZDGF--S-015	15	1.2	50	100
ZDGF--S-020	20	1.4	50	100
ZDGF--S-025	25	1.6	50	100
ZDGF--S-030	30	1.8	50	100
ZDGF--S-035	35	2.0	50	100
ZDGF--S-040	40	2.2	50	100
ZDGF--S-045	45	2.3	20	40
ZDGF--S-050	50	2.4	20	40
ZDGF--S-055	55	2.5	20	40
ZDGF--S-060	60	2.5	20	40
ZDGF--S-065	65	2.6	20	40
ZDGF--S-070	70	2.6	20	40
ZDGF--S-075	75	2.7	20	40
ZDGF--S-080	80	2.7	20	40
ZDGF--S-085	85	2.8	20	40
ZDGF--S-090	90	2.9	20	40
ZDGF--S-095	95	3.0	20	40
ZDGF--S-100	100	3.0	20	40

Product Introduction

This fiberglass sleeve is woven from alkali-free glass fiber yarns into a tubular construction. The sleeve provides thermal insulation, heat containment, fire prevention, and flame retardant properties for industrial applications. The continuous operating temperature rating reaches 550°C, with the ability to withstand higher intermittent temperatures. The sleeve is designed to wrap around industrial pipelines, electrical cables, oil conduits, and other components in heat-generating environments. The glass fiber construction does not burn or support combustion. The sleeve helps reduce heat loss from heated pipes and protects adjacent components from radiant heat exposure, contributing to energy conservation in thermal management systems.

Core Advantages

High Temperature Resistance

Continuous operating temperature rating of 550°C. Withstands intermittent exposure to higher temperatures without melting or degrading.

Alkali-Free Glass Fiber Construction

Woven from E-glass (alkali-free) fiber yarns, providing consistent mechanical strength and thermal stability across the operating temperature range.

Flame Retardant Properties

The glass fiber material does not support combustion. The sleeve self-extinguishes when removed from an open flame source.

Thermal Insulation Performance

Reduces heat transfer between components, protecting adjacent cables and hoses from radiant heat exposure.

Energy Conservation

When installed on heated pipelines, the sleeve reduces heat loss to the environment, lowering energy consumption for maintaining process temperatures.

Chemical Resistance

Resistant to most acids, alkalis, and organic solvents. The glass fiber construction does not absorb oils or fuels.

Product Features

Base material Alkali-free glass fiber (E-glass) yarns woven into a tubular braid. Fiber diameter: 7-9 micrometers. Tensile strength: > 1000 N per 25mm width.

Continuous temperature rating 550°C (1022°F). Suitable for continuous operation at this temperature without material degradation.

Intermittent temperature rating Up to 750°C for short durations. Brief exposure to higher temperatures does not cause immediate failure.

Melting point Approximately 1200°C. The glass fiber does not melt at typical industrial fire exposure temperatures.

Thermal conductivity 0.038-0.045 W/m·K at 200°C, providing effective thermal insulation in high-temperature environments.

Available inner diameters 6mm to 150mm. Standard lengths: 10m, 20m, 50m rolls. Custom diameters and lengths available upon request.

Technical Specifications

Parameter	Specification
Continuous operating temperature	-50°C to +550°C
Intermittent temperature	Up to 750°C (short duration)
Melting point	Approximately 1200°C
Thermal conductivity	0.038-0.045 W/m·K at 200°C
Fiber type	Alkali-free glass fiber (E-glass)
Fiber diameter	7-9 micrometers
Tensile strength	> 1000 N per 25mm width
Elongation at break	< 5%
Density	2.55 g/cm³ (glass fiber)
Available inner diameters	6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mm, 125mm, 150mm
Standard length	10m, 20m, 50m rolls
Color	Natural white (can be dyed upon request)

Application Scenarios

Industrial pipeline insulation

Electrical cable protection in high-heat areas

Oil conduit thermal management

Exhaust system heat shielding

Furnace and boiler components

Plastics and rubber processing machinery

Energy conservation on heated process lines

Foundry and metal processing equipment

This fiberglass sleeve is suitable for industrial environments where pipelines, cables, and conduits are exposed to elevated temperatures. Applications include thermal insulation on steam lines and heated process pipes, protecting electrical cables from radiant heat near furnaces and ovens, and covering oil conduits in hydraulic systems operating at high ambient temperatures. The sleeve is also used in exhaust systems, plastic extrusion machinery, and boiler components where heat containment and personnel protection are required. The energy conservation benefit applies to heated pipelines where reducing heat loss to the environment lowers the energy required to maintain process temperatures.

Common Questions and Solutions

What is the difference between alkali-free glass fiber and standard glass fiber?

Alkali-free glass fiber (E-glass) contains less than 1% alkali oxides, providing higher temperature resistance, better electrical insulation properties, and greater chemical resistance than standard glass fibers. E-glass maintains structural integrity at 550°C continuous, while standard glass fibers degrade at lower temperatures.

Can the sleeve be used in direct contact with molten metal?

The fiberglass sleeve can withstand brief splashes of molten metal, but continuous contact will cause the glass fibers to melt or fuse. For applications requiring direct molten metal splash protection, a silicone-coated fire sleeve provides additional protection and should be used instead.

How does the sleeve handle moisture or humidity?

Glass fiber does not absorb moisture. However, the sleeve can trap moisture between the sleeve and the protected component if installed wet. For outdoor or humid applications, ensure the sleeve and component are dry before installation. The sleeve retains its thermal properties when dry.

Can the sleeve be cut to custom lengths on site?

Yes. The sleeve can be cut to any length using sharp scissors or a utility knife. After cutting, the ends may fray. Seal the cut ends with high-temperature silicone sealant or use a hot knife to melt the glass fibers together to prevent fraying.

Does the sleeve provide electrical insulation?

The dry glass fiber sleeve provides dielectric insulation. However, the woven construction is not sealed. For applications requiring guaranteed electrical isolation, use a silicone-coated version that provides a continuous dielectric barrier. The uncoated sleeve is not recommended for high-voltage applications.

How should the sleeve be secured in place?

Secure the sleeve using stainless steel tie wraps, hose clamps, or high-temperature tape at 30-50cm intervals. Do not use plastic zip ties as they will melt at temperatures above 85°C. For vertical pipe runs, secure the sleeve at the top to prevent sliding.

Installation and Handling Considerations

Wear gloves when handling glass fiber sleeve. The fibers can cause skin irritation. Long sleeves and eye protection are recommended during cutting and installation.

Measure the outer diameter of the component to be protected. Select a sleeve with inner diameter 10-20% larger than the component diameter for easy installation without compression.

For installations on hot surfaces (>200°C), allow the sleeve to acclimate to room temperature before handling. The glass fiber retains heat and can cause burns if handled immediately after removal from a hot surface.

Do not install the sleeve over wet or oil-soaked surfaces. Clean and dry the underlying component before installation to prevent trapped fluids from vaporizing and damaging the glass fibers.

When the sleeve is used on flexible hoses, ensure sufficient slack to accommodate hose movement. The sleeve should not be stretched tight over the hose.

Inspect the sleeve periodically for visible damage such as fraying, cuts, or abrasion. Replace the sleeve if the glass fiber structure is compromised or if the sleeve no longer provides a continuous covering over the protected component.