Insulated U Bolts | Leading China U bolt manufacturer

What Are Insulated U Bolts?

Insulated U bolts are specialized fasteners with non-conductive sleeves (Rubber, PTFE, or plastic and so on) that wrap around the U bolt’s curve and threads. Unlike standard U bolts, they prevent ​electrical conductivity between metals while securing pipes, cables, or equipment. The insulation sleeve acts as a barrier to block ​galvanic corrosion (electrolytic reactions between dissimilar metals) and dampens vibrations by absorbing shock.

Commonly used in marine, oil/gas, and renewable energy projects, these bolts isolate structures exposed to saltwater, chemicals, or high-voltage environments. For example, they prevent rust on ship hulls by separating stainless steel bolts from aluminum fittings, or protect solar panel mounts from grounding faults. Key materials like ​EPDM rubber (weather-resistant) and ​PTFE (chemical-resistant) ensure durability in temperatures from -40°C to 260°C. Insulated U bolts comply with ASTM/ISO standards, making them essential for safety-critical installations where electrical isolation and corrosion resistance are non-negotiable.

Insulated U bolts are known as insulated U bolt pipe clamps also.

Insulated U bolts Technical Specifications

Younglee is a leading manufacturer of ​insulated U bolts engineered to secure critical infrastructure in harsh environments. Our insulated U bolts provide ​electrolytic corrosion prevention by isolating dissimilar metals, alongside ​electrical insulation, ​vibration dampening, and ​long-term corrosion protection. Specifically designed for shipbuilding, offshore oil platforms, FPSO/FSO projects, and subsea pipelines, these U bolts eliminate galvanic degradation risks caused by saltwater exposure. Trusted in marine engineering, solar farms, and heavy industries, Younglee’s insulated U bolts exceed ASTM/ISO standards for safety and salt spray resistance.

Here below is the common specifications of the insulated U bolts we manufacture.

Main type of insulate U bolts

Here below are the main types of the insulated U bolts Younglee manufactures.

By installtion type:

• ​ Grip type insulated U bolts

Our ​Grip-Type Insulated U-Bolt Pipe Clamps minimize vibration transfer and prevent galvanic corrosion between pipes and hangers. Designed with ​EPDM/Neoprene sleeves, they isolate dissimilar metals, ideal for marine, chemical, and HVAC systems. The grip configuration securely holds pipes while allowing ​small axial and torsional movements, accommodating thermal expansion or mechanical stress. Made from ​hot-dip galvanized steel or ​stainless steel 304/316, these clamps ensure durability in harsh environments, offering a reliable, maintenance-free solution for long-term performance.

•  Non-grip type insulated U bolts

Non-grip type U bolts are known as guide type U bolts too. it is a specialized insulated U bolt designed to secure pipes or cables while allowing controlled ​linear movement along a fixed axis. Unlike grip-type U bolts, it does not tightly clamp the pipe but instead uses a ​loose fit or ​PTFE-lined channel to guide the pipe during thermal expansion or contraction. This design prevents stress on the piping system while maintaining alignment.

Commonly used in ​HVAC, ​industrial piping, and ​marine applications, guide-type U bolts are made from ​hot-dip galvanized steel or ​stainless steel for corrosion resistance. They are ideal for systems requiring flexibility, such as steam lines or chilled water pipes, ensuring long-term reliability without compromising structural integrity.

By insulate materials:

1.  Rubber insulated U Bolts

   1. EPDM Rubber Insulated U Bolts

      • Weather-resistant and UV-stable, ideal for outdoor applications like solar farms and marine structures.

   2. ​ Neoprene Insulated U Bolts

      • Oil and chemical-resistant, commonly used in industrial and automotive environments.

   3. Silicone Rubber Insulated U Bolts

      • Heat-resistant up to 260°C, suitable for high-temperature applications such as HVAC systems.

This type of U bolts also are known as Rubber coated U bolts or U bolts with rubber sleeve.

1. ​ PTFE (Teflon) Insulated U Bolts

   • High-temperature and chemical-resistant, perfect for harsh environments like chemical plants.

2. ​ Plastic-Coated Insulated U Bolts

   • Lightweight and cost-effective, used for electrical insulation in low-stress environments.

3. ​ Flame-Retardant Insulated U Bolts

   • Designed with fire-resistant materials (e.g., flame-retardant EPDM), essential for safety-critical installations.

By U bolt materials and its coating:

1. ​ Hot-Dip Galvanized Insulated U Bolts

   • Zinc-coated for enhanced corrosion resistance, ideal for marine and offshore applications.

2. ​ Stainless Steel Insulated U Bolts

   • Made from 304/316 stainless steel for maximum durability in corrosive environments like saltwater.

3.  FluoroPolymer Coated U bolts

   • Xylan coated U bolts, PTFE coated U bolts,

Other:

1.  ​Custom-Shaped Insulated U Bolts

   • Tailored to fit unique pipe or cable configurations, often used in specialized industrial projects.

We manufacture a wide range of insulated U bolts according to customers’ requirements, specifications and drawings.

Why Choose Our Insulated U Bolts?

1. ​Electrical Insulation

   • Dielectric rubber sleeves (EPDM/neoprene) prevent galvanic corrosion and isolate electrical currents.
   • Withstand voltages up to ​15 kV/mm – perfect for securing power lines, solar panel mounts, and telecom infrastructure.

2. ​Corrosion Resistance

   • Pipes are fully isolated from their supports to prevent electrolytic corrosion.
   • Available in ​hot-dip galvanized steel (ASTM A153) or ​stainless steel 304/316 for harsh environments (marine, chemical plants, offshore platforms).

3. ​Vibration & Noise Control

   • Rubber sleeves absorb ​70% of shock loads, reducing wear on pipes and machinery.

4. ​Customizable Sizes

   • Diameters: ​1/4″ to 2″ (M6 to M56 metric) | Pipe compatibility: ​Up to 36″ (DN900).

5. Prevents clamping damage

   • our insulate U bolts can greatly prevent the clamping damages during the installation.

6. Durable in use and maintenance free

Applications of Insulated U Bolts

• ​Electrical Systems: Secure high-voltage cables, grounding systems, and transformer mounts.
• ​Solar Energy: Mount solar panels without risk of electrical shorts.
• ​Marine & Offshore: Corrosion-resistant fasteners for FPSO/FSO projects, shipbuilding, oil rigs, and docks.
• ​HVAC & Plumbing: Vibration-proof pipe clamps for industrial ducting.

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​Key Advantages Over Standard U Bolts

✅ ​Galvanic Corrosion Prevention
Insulated sleeves eliminate metal-to-metal contact, extending equipment lifespan.

✅ ​UV & Chemical Resistance
EPDM/neoprene sleeves resist ozone, oils, and weathering.

✅ ​Custom Coatings
Optional PTFE (Teflon) or Xylan coatings for enhanced wear protection.

✅ ​Fast Global Delivery
Bulk orders shipped in 10-15 days – OEM/ODM supported.

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​FAQ: Insulated U Bolts

Q: Can I use insulated U bolts outdoors?
A: Yes! Our sleeves are UV-stable and rated for extreme temperatures.

Q: Do you provide silicone sleeves?
A: Yes – silicone sleeves are available for high-temperature applications (up to 260°C).

Q: Are these Insulated U bolts reusable?
A: Absolutely. The insulated sleeves are designed for repeated installations.

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​Request a Free Quote Today

Younglee supplies ​insulated U bolts to industries worldwide, from automotive to renewable energy. Contact us for:

• ​Custom sizes and materials
• ​Volume discounts
• ​Technical drawings review

📧 ​Email: [email protected]
📞 ​Phone: +86-18612706695