Wholesale High Temperature High Temperature Hose Connection Manufacturers, OEM/ODM Factory - Ningguo Zhongdian Insulation Material Co., Ltd

High-temperature thermal conductivity soft joint, also known as silicone connector, soft joint, soft joint, is a high temperature, corrosion resistance, high elasticity, high airtightness, media resistance, and climate resistance of pipeline joints. It has high internal densification, can withstand high pressure, and good elastic deformation effect. It is used for flange and clamp links, connection with pumps and valves, pipelines with high vibration, and pipelines with frequent hot and cold changes.

Product Introduction

This high-temperature hose connection, also known as a high-temperature rubber flexible joint, silicone flexible joint, or flexible connector, provides corrosion resistance, aging resistance, and wear resistance. It improves the safety and stability of piping systems. The joint exhibits high elasticity, high air tightness, media resistance, and weather resistance. It is used for flange and clamp connections, flexible joints and reducing sockets in building exhaust systems, and internal and external anti-corrosion layers of pipes and storage tanks, ensuring stable performance at specific operating temperatures.

Core Advantages

High Elasticity

The silicone material provides high elasticity, accommodating pipe movement, vibration, thermal expansion, and misalignment without stress on connected equipment.

Corrosion and Aging Resistance

Silicone rubber construction resists corrosion from industrial chemicals, UV radiation, and ozone. Maintains properties over extended service life.

High Air Tightness

The joint provides a reliable seal at connection points, preventing leakage of gases, liquids, and vapors in building exhaust systems and process piping.

Wear Resistance

Silicone material exhibits good abrasion resistance for applications with particulate-laden air or fluid streams in exhaust and process systems.

Weather Resistance

Maintains flexibility and sealing properties in outdoor applications with exposure to temperature extremes, UV radiation, and moisture.

Multiple Connection Options

Available with flange connections (steel or stainless steel) or clamp connections for compatibility with different piping system designs.

Product Features

Material High-temperature silicone rubber. Continuous temperature rating: -40°C to +250°C (silicone), up to 350°C for short-term exposure.

Connection types Flange connection (fixed flange or loose flange), clamp connection (V-band or worm gear clamp), or reducing socket configurations.

Available sizes Inner diameter: 25mm to 600mm. Custom sizes available. Length: 100mm to 1000mm depending on application.

Flange materials Carbon steel (standard), stainless steel 304 or 316 (for corrosive environments). Flange standards: ANSI, DIN, JIS, or custom.

Operating pressure 0.5-1.5 MPa depending on diameter and reinforcement. Consult technical data for specific pressure ratings.

Reinforcement Multiple layers of fabric reinforcement (nylon or polyester) embedded in silicone for increased pressure capability.

Technical Specifications

Parameter	Specification
Material	High-temperature silicone rubber (VMQ)
Continuous operating temperature	-40°C to +250°C
Short-term peak temperature	350°C (less than 1 hour)
Pressure rating	0.5-1.5 MPa (depending on size and reinforcement)
Vacuum rating	Full vacuum (0.1 MPa absolute) for most sizes
Available inner diameters	25mm, 32mm, 40mm, 50mm, 65mm, 80mm, 100mm, 125mm, 150mm, 200mm, 250mm, 300mm, 350mm, 400mm, 500mm, 600mm
Standard length	150mm, 200mm, 250mm, 300mm, 500mm, 1000mm (custom lengths available)
Flange materials	Carbon steel (Q235), Stainless steel 304, Stainless steel 316
Reinforcement layers	2-6 layers of fabric (dependent on pressure rating)
Hardness (Shore A) 那样50-70 Shore A
Color	Red (standard), black, white, other colors available

Application Scenarios

Building exhaust system flexible joints

Industrial process piping connections

Pipe and storage tank anti-corrosion layers

HVAC ductwork vibration isolation

Chemical processing pipe connections

Wastewater treatment plant piping

Power plant cooling water systems

Food and pharmaceutical processing lines

This high-temperature hose connection is suitable for building exhaust systems where flexible joints accommodate thermal expansion and vibration between duct sections, reducing stress on roof penetrations and equipment connections. Industrial process piping uses the joints to connect pumps, compressors, and vessels, isolating vibration and allowing small misalignments. Pipe and storage tank anti-corrosion layer systems incorporate the joints as flexible transition sections between rigid lined pipes. HVAC ductwork uses the connections for vibration isolation between air handling units and rigid ductwork, reducing noise transmission. Chemical processing lines benefit from the joint's chemical resistance and high-temperature capability. Wastewater treatment plant piping connections accommodate ground settlement and equipment vibration. Power plant cooling water systems use the joints between pumps and pipe headers for vibration isolation. Food and pharmaceutical processing lines utilize sanitary flange connections for compliance with hygiene standards.

Common Questions and Solutions

What is the maximum continuous operating temperature for these joints?

The standard high-temperature silicone joint operates continuously from -40°C to +250°C. For applications requiring higher temperatures, a fluorosilicone (FVMQ) version is available for up to 300°C continuous. For intermittent high-temperature exposure (short duration), standard silicone can withstand up to 350°C.

Can the joint accommodate pipe misalignment?

Yes. The flexible silicone construction allows for angular misalignment up to 10-15 degrees, lateral misalignment up to 10-20mm depending on diameter, and axial compression/extension up to 15-25% of the joint length. The exact movement allowance depends on the joint length, diameter, and pressure rating. Consult the technical datasheet for specific values.

Are the joints resistant to chemicals and oils?

Standard silicone rubber resists many chemicals including dilute acids, alkalis, salt solutions, and alcohols. However, silicone is not recommended for prolonged exposure to concentrated acids, strong alkalis, hydrocarbon fuels, or chlorinated solvents. For chemical resistance, a fluorosilicone (FVMQ) or fluorocarbon (FKM) version is available. Consult chemical compatibility data.

How are the joints installed between flanges?

Place the joint between two pipe flanges with standard gaskets on each side of the joint. Use appropriate bolt length to accommodate the joint thickness. Tighten bolts in a star pattern to recommended torque specifications. Do not overtighten as this may compress the joint excessively and reduce movement capacity.

What is the lifespan of the silicone joints?

Under normal operating conditions within temperature and pressure ratings, silicone joints have a service life of 5-10 years. Lifespan depends on operating conditions, exposure to chemicals, UV radiation, and mechanical stress. For outdoor applications, silicone has good UV resistance. Regularly inspect joints for surface cracking, hardening, or softening.

Can the joints be used in vacuum applications?

Yes. The joints are suitable for full vacuum service (0.1 MPa absolute) for diameters up to 600mm, provided the joint is properly supported and not subjected to external crushing forces. For high vacuum applications (below 0.1 MPa absolute), consult the manufacturer for specific design requirements.

Installation Considerations

Ensure the mating pipe flanges are aligned before installation. Do not use the joint to correct gross pipe misalignment beyond its rated movement capacity. Excessive misalignment will reduce joint life.

For flange connections, use flat gaskets on both sides of the joint if the flange faces are not flat. The joint itself may provide sealing without additional gaskets, but gaskets are recommended for uneven flange surfaces.

For clamp connections (V-band), ensure the clamp is properly seated in the groove before tightening. Do not exceed the clamp manufacturer's torque specification.

Do not install the joint in a twisted or torqued state. The joint should be installed in a relaxed position. Excessive torsion will cause premature failure.

Support pipes on both sides of the joint to prevent sagging and excessive weight on the connection. For vertical installations, provide support to prevent the joint from supporting the weight of the pipe.

Inspect joints periodically for surface cracking, swelling, or hardening. Replace joints that show signs of degradation. For critical applications, establish a regular replacement schedule based on operating conditions.