In industrial and mechanical systems, small components can make a big difference, especially when it comes to pipe support and vibration control. One such component that’s often overlooked but critically important is the cushion strut clamp.
These versatile supports are designed to secure piping, tubing, and conduit to strut channel while isolating vibration and reducing noise. Whether used in HVAC, chemical plants, wastewater facilities, or mechanical rooms, cushion strut clamps offer performance, protection, and longevity.
In this article, we’ll explore the construction, purpose, and key benefits of using cushion strut clamps in your system design.
What Is a Cushion Strut Clamp?
A cushion strut clamp is a two-piece pipe clamp that mounts directly to strut channel. It features a steel clamp body with a rubber or thermoplastic insert (the cushion) that wraps around the pipe or tube. This insert serves as a buffer between the pipe and the clamp, protecting both components and reducing the transmission of vibration or movement.
Common Sizes & Uses:
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Available for 1/4" to 6" OD piping and conduit
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Compatible with copper, steel, stainless steel, and plastic pipe
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Frequently used in HVAC, plumbing, fire protection, water treatment, and industrial skid packages
Top Benefits of Cushion Strut Clamps
1. Vibration Damping
The rubber or thermoplastic cushion absorbs shock and vibration that would otherwise transfer from equipment to pipe (or vice versa). This helps:
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Reduce mechanical fatigue
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Lower noise levels in occupied spaces
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Improve system longevity
2. Thermal Expansion Compensation
As piping systems expand and contract with temperature, rigid metal-on-metal contact can lead to wear and eventual failure. The cushion insert provides a slip-resistant but forgiving surface, accommodating small movements without damaging the pipe.
3. Corrosion Protection
By isolating dissimilar metals, cushion clamps prevent galvanic corrosion, especially between copper, aluminum, and steel. The cushion also prevents moisture and debris from becoming trapped between the pipe and the clamp body, helping to reduce localized corrosion.
4. Pipe Protection
The cushion prevents pipe deformation or abrasion, especially with softer materials like copper or plastic. This is especially valuable in refrigerant lines, medical gas systems, or food-grade piping where surface integrity is critical.
5. Fast & Modular Installation
Cushion clamps are quick to install using standard strut and hardware. They fit into modular framing systems, allowing for:
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Easy layout changes
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Secure mounting without welding
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Compatibility with other clamp and support types
6. Wide Range of Materials & Ratings
Cushions are available in materials like:
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EPDM rubber (UV-resistant, -65°F to 275°F)
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PVC (economical and non-conductive)
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TPE (chemical-resistant)
Some clamps are UL-listed, FM-approved, and designed to meet industry specs for fire protection and seismic bracing.
Where Cushion Clamps Excel
Cushion strut clamps are ideal in systems where:
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Noise and vibration control are a priority
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Mixed-metal piping is present
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Temperature fluctuations are expected
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Non-destructive installation is preferred
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Appearance and cleanliness matter, such as in labs or cleanrooms
Available in multiple sizes, materials, finishes, and cushion types, Hayward Pipe can help you select the right clamp for your application, whether you're securing chilled water lines, chemical tubing, or high-vibration systems.
Final Thoughts
A cushion strut clamp may seem like a small detail, but in engineered systems, it's exactly those components that preserve performance, reduce maintenance, and ensure long-term safety.
If you’re specifying a support system, consider the added value of vibration control, corrosion resistance, and pipe protection that cushion clamps offer.
