Removable Insulation Blankets & Jackets: Heat Loss, Savings & Sizing
What a removable insulation blanket is, how much it saves (with real numbers), what it's made of, and every hot component it fits. Removable blankets — also called insulation jackets, pads or covers — insulate the parts that fixed lagging can't, because they unzip for maintenance and refit with no damage.
How much does a removable insulation blanket save? (quantified)
Most references describe the benefit only in words. Here are the actual numbers (ASTM C680, 20 °C ambient, 8,000 h/yr, natural gas), per single component:
| Component | Surface °C | Bare loss | Saved/yr | CO₂/yr |
|---|---|---|---|---|
| Steam header (3 m²) | 430 | 60 kW | 557 MWh | 112 t |
| Feed-water pump (2.5 m²) | 160 | ~10 kW | ~90 MWh | ~18 t |
| Expansion joint (1.6 m²) | 280 | 14.5 kW | 136 MWh | 27 t |
| Heat exchanger shell (4 m²) | 150 | 14 kW | 128 MWh | 26 t |
| Gate valve (0.35 m²) | 350 | ~4.8 kW | ~45 MWh | ~9 t |
| Flange pair (0.22 m²) | 350 | ~3 kW | ~28 MWh | ~6 t |
Reduction 90–98%; outer surface ≤45 °C. A plant carries dozens of each — run your own line items in the whole-plant savings calculator.
Removable insulation blankets by component
Each hot component has its own heat-loss profile and its own page with computed figures:
What are they made of? (materials & thickness)
A removable blanket is a multi-layer assembly tailored to each part:
- Insulation core — mineral wool (stone wool / Rockwool-type): 50 mm Lamella mat up to 220 °C surface, 100 mm Wired mat above 220 °C (conductivity rises with temperature). Mineral wool is the workhorse of industrial hot insulation: non-combustible, stable to ~640 °C and cost-effective.
- Aerogel: where a thin profile or tight clearance demands it — same R-value at roughly half to a third of the thickness.
- Ceramic fiber: for the very hottest duties (furnace doors, exhausts towards +600 °C and beyond).
- Closed-cell elastomeric foam (Armaflex-type, nitrile rubber): the cold-side counterpart — used in cold insulation covers to stop condensation and pipe sweating on chilled lines; not for hot surfaces.
- Outer facing: silicone-coated glass cloth (to ~260 °C) or PTFE/high-temp cloth for hotter duties; weather-, salt- and oil-resistant facings for outdoor and marine insulation (ships, onshore and offshore platforms — sea-salt air is the harshest service an insulation cover sees).
- Fasteners: quick-release hook-and-loop, lacing hooks or springs so the blanket comes off and back on in minutes.
The system is sized so the bare surface temperature drops to a touch-safe ≤45 °C — confirmed against the ASTM C680 methodology.
What thickness should an insulation blanket be?
| Surface temperature | Core & thickness | Outer surface |
|---|---|---|
| up to 220 °C | 50 mm mineral-wool Lamella | ≤45 °C |
| 220–600 °C | 100 mm mineral-wool Wired mat | ≤45–50 °C |
| tight clearances, any T | aerogel, ~⅓–½ the thickness | ≤45 °C |
Thickness is driven by the surface temperature, not the component type — conductivity rises with temperature, so hotter surfaces need the thicker tier for the same touch-safe result.
One product, many names — industrial insulation, jackets, pads, covers
Buyers call this same product different things, and Inzonex manufactures all of it. Removable insulation blankets, removable thermal insulation blankets, insulation jackets, insulation pads, reusable insulation covers, industrial insulation, mechanical insulation and high-temperature (high-heat) insulation all describe the same family of soft, removable covers for hot equipment — the difference is the word, not the product. The term is always industrial-qualified: a removable insulation jacket on a valve, flange or steam line, not loft or pipe-lagging from a DIY store. We also make cold insulation covers (to stop condensation and pipe sweating) and heat-trace insulation, plus one-off covers for awkward items such as backflow preventers and instrument assemblies. The same removable blankets cover industrial pipe insulation and insulation jackets across every hot-process sector — power plant insulation, oil refinery insulation, chemical-plant, dairy, food and brewery insulation, pharmaceutical and offshore/marine.
Engineered modular insulation vs a generic blanket
Not all removable blankets are equal. A cheap, loosely-fitted generic blanket leaves gaps at flanges and stems — and a gap is where the heat escapes, so a poor fit can give back much of the saving the table above promises. Inzonex makes engineered modular insulation — we are the manufacturer, not a reseller — designed and patented (UK Patent GB2508992.1) for an exact, repeatable fit:
| Generic / cheap blanket | Inzonex modular insulation | |
|---|---|---|
| Fit | Loose, gaps at fittings → heat leaks | Tailored to each part, sealed seams |
| Reuse | Degrades, often single-fit | Removable & reusable for years, refits after every inspection |
| Surface temp | Often >60 °C — burn risk | Engineered to ≤45 °C (touch-safe) |
| Verification | "reduces energy" — no numbers | ASTM C680 / ISO 12241 figures + survey |
| Range | Limited temperature | Up to +600 °C, material tiered by temperature |
Buying on headline price alone backfires: a blanket that doesn't fit doesn't save. Inzonex is engineered for fit and reuse — ask for a per-component quote to compare true value.
FAQ
What is a removable insulation blanket?
A tailored, reusable insulation cover (also called a jacket, pad or cover) fitted over a hot component. Unlike fixed cladding it unzips in minutes for maintenance and refits with no damage — so the parts normally left bare (valves, flanges, expansion joints) finally get insulated.
How much does it save?
By ASTM C680: a bare gate valve at 350 °C loses ~8 kW, a steam header ~60 kW, a feed-water pump ~46 kW — continuously. A blanket cuts each 90–98%. One 280 °C component saves ~116 MWh and 27 t CO₂/yr; payback usually under two years.
What are they made of?
Mineral-wool core (50 mm Lamella ≤220 °C / 100 mm Wired mat >220 °C, or aerogel), silicone-coated glass or PTFE outer facing, and quick-release fasteners. Outer surface held ≤45 °C.
Where are they used?
On any hot component needing access — valves, flanges, pumps, steam traps, heat exchangers, expansion joints, turbines, autoclaves, boiler doors and HRSG fittings — across power, chemical, food, pharma and oil & gas plants.
Industrial insulation, mechanical insulation, insulation jackets, pads, covers — are they the same thing?
Yes — these are different names for the same product: a soft, removable insulation cover fitted to hot industrial equipment. "Industrial insulation" and "mechanical insulation" are the trade terms; "jacket", "pad", "blanket" and "cover" describe the form factor. Inzonex makes all of them, engineered per component. (Note these are industrial products — not loft, spray-foam or DIY pipe lagging.)
What thickness should an insulation blanket be?
Driven by surface temperature: 50 mm mineral wool up to 220 °C, 100 mm from 220–600 °C (conductivity rises with temperature); aerogel gives the same R at ~⅓–½ the thickness where space is tight. Either way the outer surface is held ≤45 °C.
Mineral wool (Rockwool), ceramic fiber or Armaflex — which is used?
Hot side: mineral wool (stone-wool/Rockwool-type) or aerogel, ceramic fiber for the hottest duties. Closed-cell elastomeric foam (Armaflex-type) is the cold-side material — for condensation control on chilled lines, not hot surfaces. Marine-grade facings are used for ships and onshore/offshore platforms.