INDUSTRIAL INSULATION
Insulative coating or removable blankets: which fits your pipes and equipment?
Use a bonded insulative coating on pipe, tanks and vessels that stay closed, where burn protection, corrosion under insulation or condensation is the main problem. Keep removable blankets on valves, flanges and exchanger heads that are opened every year or more, and use conventional insulation where the goal is the most heat-loss reduction per foot of straight pipe.
The short answer
This is a question of fit, not which method is better everywhere. Choose a bonded coating for equipment that stays closed and blankets for fittings that need regular opening; most plants end up using both.
Where the coating is the better fit
| Situation | Better fit | Why |
|---|---|---|
| Pipe runs, tanks and vessels that are not opened | Insulative coating | Bonded to the surface with no jacket to remove, refit or reseal. |
| Corrosion under insulation is a concern | Insulative coating | No jacket seams or gaps for water to sit against the steel, which reduces the conditions behind CUI. |
| Burn protection across large hot areas | Insulative coating | Covers irregular shapes and large surfaces in one continuous film. |
| Sweating chilled-water, glycol or refrigeration lines | Insulative coating | Controls condensation at the surface. |
| Inspection access matters | Insulative coating | The coated surface can be checked visually without stripping jackets. |
| No time for custom fabrication | Insulative coating | Sprayed in place; no measured, sewn or fabricated covers to wait for. |
| Valves, flanges or exchanger heads opened every year or more | Removable blankets | The coating must be cut out and patched at every opening; blankets come off and go back on. |
| Very high-temperature service | Removable blankets or conventional insulation | Above the coating's rated range, a coating is the wrong tool. |
| Maximum heat-loss reduction on long straight runs | Conventional insulation | Far thicker, so it insulates more per foot of straight pipe. |
Where blankets and conventional insulation still win
Keep removable blankets on valves, flanges and exchanger heads opened every year or more: taking a cover off and refitting it avoids cutting and patching a coating at each opening. For service above the coating's rated temperature range, use suitable blankets or conventional insulation instead. On long, straight pipe runs where heat loss is the priority, the greater thickness of conventional insulation makes it the stronger fit. The coating's case is safety, CUI, condensation, awkward geometry and inspection, not maximum heat-loss reduction per foot.
How to decide for each piece of equipment
- Is it opened for maintenance, and how often?
- What is the operating temperature, hot or cold?
- Is corrosion under existing insulation already a problem?
- What matters most here: touch safety, condensation, or heat loss?
A mixed plant usually coats the runs and vessels and keeps blankets on the fittings that get opened.
Where NanoGuard Cool Touch fits
NanoGuard Cool Touch met touch-safe criteria on a 275°F (135°C) surface with a 41-mil coating under NACE TM21423-2023. The required thickness follows the operating temperature, applied in passes of up to 40 mils. For outdoor application, both the air and the surface must be warmer than 40°F (4°C).
Your next step
Send your equipment list, operating temperatures and which items are opened for maintenance so we can review where each method fits.
Questions
Can an insulative coating replace all of my pipe insulation?
Usually not. It fits closed runs, tanks and vessels where touch safety, corrosion under insulation or condensation is the main concern. Fittings opened often and very high-temperature service are better served by removable blankets or conventional insulation, and conventional insulation insulates more per foot on long straight runs.
Why use a coating on a valve or flange at all?
On fittings that are rarely opened, a coating covers awkward shapes without custom fabrication. If the fitting is opened every year or more, a removable blanket is the better choice because the coating would need to be cut out and patched each time.
Does the coating help with corrosion under insulation?
It is bonded directly to a primed surface with no jacket seams or gaps where water can sit, which reduces the conditions behind CUI. Surface preparation and the right primer are part of the system.