Wholesale High Temperature Resistant 700° Braided Cable Sleeve Factory

Product Introduction

This basalt fiber knitted sleeve is manufactured from high-quality basalt fibers that undergo processing and surface treatment. Basalt fiber is recognized as a material with applications across multiple industrial sectors. The knitted construction provides flexibility and conformability around irregular shapes. The sleeve offers resistance to extreme temperatures, acids, alkalis, and corrosive environments. It also exhibits moisture absorption characteristics, insulation properties, high-temperature filtration performance, and radiation resistance. The operating temperature range extends from -260°C to +1200°C. The sleeve is applicable in aerospace, aviation, military, high-speed rail, and automotive industries, providing thermal protection for cables, hoses, and piping systems in demanding environments.

Core Advantages

Knitted Construction Flexibility

The knitted structure provides greater conformability around bends, fittings, and irregular component shapes compared to braided sleeves.

Extreme Temperature Range

Operating temperature range from -260°C to +1200°C, suitable for cryogenic and ultra-high-temperature applications.

Chemical and Corrosion Resistance

Resistant to acids, alkalis, and corrosive chemicals. Maintains structural integrity in chemically aggressive environments.

Radiation Resistance

The sleeve withstands radiation exposure, making it suitable for nuclear and aerospace applications.

High-Temperature Filtration Performance

The knitted fiber structure provides effective filtration of particulates in high-temperature gas streams.

Electrical Insulation Properties

Basalt fiber offers dielectric insulation, suitable for protecting electrical components in high-temperature zones.

Product Features

Base material High-quality basalt fiber processed from natural volcanic rock. Continuous operating temperature: -260°C to +650°C; intermittent: up to 1200°C.

Knitted construction Knitted tubular structure provides higher stretch and conformability than braided sleeves. Expands to pass over fittings and connectors.

Fiber properties Filament diameter: 6-12 micrometers. Density: 2.65-2.80 g/cm³. Tensile strength: 3000-4800 MPa.

Chemical resistance Resistant to most acids (except HF), alkalis, salt solutions, and organic solvents. Alkali resistance superior to E-glass fiber.

Thermal insulation performance Thermal conductivity: 0.031-0.038 W/m·K at 500°C. Provides effective insulation across the temperature range.

Available inner diameters 6mm to 100mm (unstretched). Knitted construction allows expansion up to 2-3x the resting diameter. Standard lengths: 10m, 20m, 30m rolls.

Technical Specifications

Parameter	Specification
Continuous operating temperature	-260°C to +650°C (cryogenic to high temperature)
Intermittent peak temperature	Up to 1200°C (short duration)
Melting point	Approximately 1350°C
Knitted construction type	Circular knit, tubular. Stretch ratio: up to 200-300% of resting diameter.

Application Scenarios

Aerospace wire harness protection

Aviation engine compartment insulation

Military vehicle cable systems

High-speed rail electrical conduits

Automotive exhaust and turbocharger

Cryogenic pipe insulation (LNG systems)

High-temperature gas filtration

Nuclear facility cable management

This basalt fiber knitted sleeve is suitable for demanding applications across multiple industries. The knitted construction allows the sleeve to expand and conform around connectors and irregular shapes, simplifying installation in tight spaces. In aerospace and aviation, the sleeve provides thermal protection for wiring harnesses in engine compartments and high-temperature zones near exhaust systems. Military applications include protection of vehicle electrical systems in extreme environments. High-speed rail systems use the sleeve for thermal management of braking resistors and traction equipment. Automotive applications include turbocharger heat shielding, exhaust system insulation, and engine compartment cable protection. The sleeve's cryogenic capability makes it suitable for LNG (liquefied natural gas) transfer lines and liquid nitrogen handling equipment.

Common Questions and Solutions

What is the advantage of knitted construction over braided construction?

Knitted sleeves offer higher stretch and conformability, allowing them to expand up to 2-3 times their resting diameter. This enables installation over connectors, fittings, and irregular component shapes without requiring disconnection. Braided sleeves have lower stretch but higher abrasion resistance. Choose knitted sleeves for easy retrofitting and tight-radius applications.

How does basalt fiber compare to fiberglass for high-temperature applications?

Basalt fiber offers higher continuous temperature resistance (650°C vs 550°C for E-glass), better alkali resistance, higher tensile strength, and superior radiation resistance. Basalt fiber also maintains flexibility at cryogenic temperatures down to -260°C, while glass fiber becomes brittle below -50°C. Basalt is suitable for a wider temperature range.

Can the knitted sleeve be used over existing harnesses without disconnection?

Yes. The knitted construction allows the sleeve to expand significantly, making it possible to slide over connectors that are up to 2-3 times the sleeve's resting diameter. For larger connectors, the sleeve can be installed by stretching it over the connector. For very large connectors, consider a wrap-style sleeve with hook-and-loop closure.

What is the radiation resistance of the basalt fiber knitted sleeve?

Basalt fiber demonstrates high resistance to gamma and neutron radiation. The sleeve maintains mechanical and thermal properties after exposure to total doses exceeding 10⁸ rad. This makes it suitable for nuclear power plant containment areas, spent fuel handling, and space applications where radiation exposure is a concern.

Does the sleeve require any special handling for fiber dust?

Basalt fiber can cause mechanical skin irritation similar to glass fiber. Wear gloves, long sleeves, and safety glasses when handling. Use an N95 respirator when cutting or if significant dust generation occurs. The surface treatment reduces dust generation compared to untreated fibers. After installation, no special handling is required.

How should the knitted sleeve be secured in place?

Secure the sleeve using stainless steel tie wraps, high-temperature tape, or Inconel wire depending on the operating temperature. For temperatures up to 650°C, stainless steel tie wraps are suitable. For temperatures above 650°C, use Inconel wire. Space securing bands every 20-30cm. The knitted construction resists sliding better than braided sleeves due to higher friction.

Installation and Handling Considerations

Wear gloves, long sleeves, and safety glasses when handling basalt fiber sleeves. The fibers can cause mechanical skin irritation similar to glass fiber. Use an N95 respirator when cutting or if significant dust generation occurs.

Measure the outer diameter of the component and the largest connector that must pass through the sleeve. Select a sleeve with resting inner diameter smaller than the connector, as the knitted construction will stretch to accommodate it.

To install over connectors, stretch the knitted sleeve by pulling it lengthwise while expanding the diameter with your fingers. The sleeve will contract around the cable after passing over the connector.

For cryogenic applications (-100°C to -260°C), pre-warm the sleeve to room temperature before installation if possible. The fiber is more flexible at ambient temperature.

Cut the sleeve using sharp scissors or a utility knife. Seal cut ends with high-temperature silicone or a basalt fiber-compatible adhesive to prevent unraveling of the knitted structure. For high-temperature applications above 600°C, use stainless steel or Inconel wire wraps at the ends instead of adhesives.

Inspect the sleeve periodically for visible damage such as unraveling, cuts, or discoloration. Replace the sleeve if the knitted structure is compromised. The knitted construction may snag on sharp edges; use protective edge trim on mounting brackets and panel cutouts to prevent damage.