Wholesale High Temperature Fire Sleeve With Velcro Manufacturers, OEM/ODM Factory - Ningguo Zhongdian Insulation Material Co., Ltd

The buckle-type flame-retardant casing is made of fire-retardant casing, flame-retardant velcro, and high-temperature thread sewing.
The performance of buckle-typee flame-retardant casing is the same as that of the fire-retardant casing, which solves the problem of high-temperature protection of the pipeline on the equipment, and the high-temperature protection after the installation of the pipeline assembly, and the flexible and simple structure facilitates the installation of the pipeline in various circumstances, to achieve the effective high-temperature protection.

INNER DIAMETER	Ф10mm-Ф200mm
COLOUR	The product’s colour is rust red conventionally, some other colours can be customized to the requirements of customers, like yellow、blue、white、grey、 black and so on.
WORKINGTEMPERATUREE	Continuously working from -75℃-350℃,instantaneous temperature up to 1600℃
RATE VOLTAGE	7KV-25KV
CHARACTERISTICS	Fire proof、 flame retardant、 thermalinsulation, insulation, anti-aging、 molten steel spiling prevented 、 waterproof、grease proofing 、acid and alkali resistant

Product Introduction

This fire sleeve with Velcro closure is manufactured from standard-grade fire-retardant sleeving material with flame-retardant Velcro tape sewn along the longitudinal edge using high-temperature sewing thread. The wrap-around design allows the sleeve to be installed around existing hoses, cables, and pipes without disconnecting the ends. The hook-and-loop closure system enables tool-free installation and removal. The sleeve provides thermal protection against high temperatures, molten metal splashes, and open flames. The closure design maintains sealing performance along the seam, reducing flame and smoke penetration through the opening. The sleeve is suitable for retrofit applications where conventional tubular fire sleeves cannot be installed without component disassembly.

Core Advantages

Wrap-Around Installation

The sleeve wraps around existing components, eliminating the need to disconnect hose ends or remove cable connectors during installation.

Tool-Free Closure

Velcro hook-and-loop closure enables installation and removal without special tools, reducing installation time and maintenance complexity.

Flame-Retardant Velcro

The hook-and-loop tape is manufactured from flame-retardant materials, maintaining fire safety performance along the closure seam.

High-Temperature Stitching

The sleeve is sewn with high-temperature thread that maintains seam integrity under prolonged heat exposure without melting or breaking.

Sealing Performance

The overlapping closure design provides a continuous barrier that reduces flame and smoke propagation through the sleeve opening.

Adjustable Fitment

The Velcro closure allows the sleeve to accommodate slight variations in component diameter, providing a secure fit on irregular shapes.

Product Features

Base material Standard-grade fire-retardant sleeving manufactured from alkali-free glass fiber or high-bulk fiber with silicone coating. Continuous temperature rating: 260°C.

Closure system Flame-retardant Velcro hook-and-loop tape sewn along the entire length of the sleeve. Width: 25mm or 50mm depending on sleeve diameter.

Sewing thread High-temperature resistant thread (Nomex or PTFE-coated fiber). Melting point: >300°C. Provides seam integrity under heat exposure.

Temperature rating Continuous service: 260°C. Intermittent exposure: up to 1100°C for short durations. Flame resistance: UL VW-1 certified.

Overlap design The sleeve edges overlap by 25-35mm when closed, creating a continuous barrier that reduces flame and smoke penetration through the seam.

Dimensions available Accommodates component diameters from 10mm to 150mm. Standard lengths: 1m, 2m, 5m, 10m. Custom lengths available.

Technical Specifications

Parameter	Specification
Continuous operating temperature	-50°C to +260°C (sleeve), -40°C to +150°C (Velcro)
Intermittent temperature resistance	Up to 1100°C for 15-30 seconds (sleeve body)
Flame resistance rating	UL VW-1, self-extinguishing within 5 seconds
Velcro material	Flame-retardant nylon. Hook-and-loop closure with temperature rating: -40°C to +150°C continuous
Sewing thread material	Nomex or PTFE-coated fiber. Melting point: >300°C
Dielectric strength	10-15 kV/mm (sleeve material)
Available sleeve inner diameters	20mm, 30mm, 40mm, 50mm, 60mm, 80mm, 100mm, 120mm, 150mm
Standard lengths	1m, 2m, 5m, 10m rolls
Color	Iron oxide red (sleeve), black (Velcro tape)

Application Scenarios

Retrofit installations without disconnection

Hydraulic hoses in confined spaces

Electrical cable bundles

Industrial machinery wiring

Marine engine compartments

Rail transit vehicle cables

Temporary or seasonal protection

Maintenance and inspection access

This fire sleeve with Velcro closure is suitable for applications where conventional tubular sleeves cannot be installed due to component configuration. Applications include retrofitting fire protection onto existing hydraulic hoses in steel mills and foundries without disconnecting fittings, protecting electrical cable bundles in industrial machinery where connectors are larger than the cable diameter, and marine engine compartments where hoses are routed through tight spaces. The removable design also suits temporary fire protection for seasonal equipment and applications requiring regular inspection access, where the sleeve can be opened and reclosed without cutting or removing the sleeve.

Common Questions and Solutions

What is the maximum continuous temperature rating for the Velcro closure?

The flame-retardant Velcro has a continuous temperature rating of -40°C to +150°C. For applications exceeding 150°C continuous, the sleeve body may still protect the underlying component, but the Velcro may degrade over time. For higher temperature applications, use the standard tubular fire sleeve without Velcro.

Can the sleeve be cut to custom lengths on site?

Yes. The sleeve can be cut to any length using scissors. After cutting, seal the cut end with high-temperature silicone sealant to prevent fraying of the glass fiber edges. The Velcro extends the full length of the sleeve; cutting will separate the Velcro at the cut point.

Does the Velcro closure maintain fire protection along the seam?

The overlapping design provides a continuous barrier. The flame-retardant Velcro does not melt or drip under fire exposure, but the seam is not completely sealed against flame. For applications requiring a full seal against flame propagation, standard tubular sleeves without a longitudinal opening are recommended.

How do I select the correct sleeve size for my application?

Measure the outer diameter of the hose, cable, or pipe. Select a sleeve with a diameter 10-20% larger than the component diameter. The Velcro closure allows for adjustment within a 20-30mm range. For bundles, measure the total bundle diameter and add 20% for sizing.

Can the sleeve be reused after removal?

Yes, the Velcro closure allows multiple open-close cycles. However, repeated exposure to high temperatures may reduce Velcro adhesion. Inspect the Velcro for loss of hook-and-loop engagement after 5-10 thermal cycles. Replace the sleeve if the closure no longer holds securely.

Is the sleeve resistant to oils and chemicals?

The silicone-coated sleeve resists mineral oils, hydraulic fluids, diesel, and gasoline. The Velcro tape is nylon-based and may absorb oil over time, reducing adhesion. For oil-soaked environments, consider a wrap-style sleeve with stainless steel ties instead of Velcro.

Installation Considerations

Clean and dry the hose or cable surface before installation. Remove oil, grease, and debris that may prevent the sleeve from lying flat against the component.

Wrap the sleeve around the component with the Velcro closure facing away from direct heat sources when possible. The overlapping edge should face downward or away from the primary heat direction.

Press the Velcro closure firmly along its entire length to ensure full engagement. For sleeves longer than 1 meter, secure both ends with stainless steel tie wraps to prevent the sleeve from sliding off during operation.

For installations with sharp bends, apply the sleeve in multiple shorter sections rather than one long section. Overlap adjacent sections by 5-10cm to maintain continuous protection.

Inspect the Velcro engagement after the first 24-48 hours of operation. Thermal expansion of the underlying component may loosen the closure. Re-press the Velcro as needed.

Periodically inspect the sleeve for damage to the Velcro or the base material. If the Velcro no longer holds securely or the glass fiber core is exposed, replace the sleeve. Do not use plastic zip ties to secure the sleeve as they will melt under high temperatures.