When insulating piping systems, many engineers ask:
“Should we also insulate the supports?”
Pipe shoes, saddles, and brackets often stick out of the insulation. Some designs leave them exposed. Others cover them completely.
So what’s the correct approach?
In this article, we’ll explain:
- When to insulate pipe supports
- When it’s okay to leave them bare
- Why this matters for heat loss, safety, and corrosion
Let’s break it down clearly for beginners in plant design or maintenance.
What Are Pipe Supports?
Pipe supports like shoes or saddles are metal structures that hold pipes in place.
They transfer the pipe’s weight to racks or beams and allow for thermal expansion.
You’ll see them on:
- Horizontal pipelines
- Vertical pipe risers
- Insulated high-temperature or cryogenic lines
Why Don’t All Supports Get Insulated?
There are a few reasons why some supports are left uninsulated:
- Mechanical strength: Some supports must stay rigid and are hard to insulate.
- Accessibility: Exposed supports are easier to inspect or replace.
- Low impact: In some cases, heat loss through supports is very small.
But in other situations, leaving them bare can cause problems.
When Should You Insulate Pipe Supports?
Here are common reasons to include supports in insulation design:
- High-temperature pipes
If the pipe carries hot fluids (e.g., steam), exposed supports become burn hazards. - Energy efficiency
For long runs of piping, even small heat loss at supports can waste energy. - Corrosion under insulation (CUI)
Temperature swings and condensation can form around exposed support areas, leading to hidden corrosion. - Condensation control (for cold lines)
Bare metal near cold pipes can cause water droplets to form, leading to safety or contamination risks.
Design Tips for Insulating Supports
- Use pre-insulated pipe shoes for clean installation and consistent thermal performance.
- Coordinate with structural and mechanical teams—not all supports can or should be insulated.
- Always follow plant standards or client specifications.
When It’s Okay to Skip Insulation
Sometimes, you can leave supports bare, such as when:
- The pipe is at low temperature (e.g., cooling water)
- The exposed area is small and not a safety concern
- You need easy access for frequent maintenance
Use engineering judgment based on the function, location, and fluid type.
Summary
Here’s a quick recap:
- Pipe supports (shoes, saddles) may or may not be insulated depending on system needs
- Insulate when dealing with high heat, energy efficiency, condensation, or corrosion risks
- Use pre-insulated supports or design around safety and maintenance needs
- Always check plant guidelines or codes
Understanding support insulation helps you build safer, more reliable, and more efficient piping systems.