This is a cache of https://www.paroc.com/en/applications/technical-insulation/process-industry/industrial-boilers/boiler-walls. It is a snapshot of the page as it appeared on 2026-02-04T00:19:10.890+0000.
Process boiler wall insulation | Paroc Applications
Skip to main content

Process boiler wall insulation

Focus on high-performance insulation solutions

Process Boilers should be equipped for a wide range of requirements. They are supposed to withstand extremely high temperatures. However, they should also be able to tolerate significant temperature differences as the temperatures in various areas of the construction fluctuates greatly. In addition, the casing and pipes of boilers are usually exposed to constant vibrations caused by connected devices such as burners and blowers.

Proper insulation for power plant boilers is therefore essential to help minimize thermal loss and thermal bridges in the boiler as well as prevent the boiler room from overheating. We recommend a boiler insulation solution consisting of two to four layers to help control thermal radiation, and make the boilers perform optimally and more energy efficiently, which in turn leads to lower CO2 emissions. Learn more about thermal insulation here >

Our PAROC® Pro Slabs (WR) and Wired Mats (WR) have been specially developed to meet these demands. Due to the high flexibility and mechanical strength of stone wool, they are perfectly suited for use at elevated temperatures. The excellent thermal properties of stone wool can withstand extremely high temperatures (up to 700 oC) and large temperature differences in different parts of the boiler. 

Please consult the respective product data sheet for more information.

Process boiler wall insulation with Paroc Stone Wool, image

Benefits from process boiler wall insulation

High flexibility and strength

Our PAROC® Pro Slabs (WR), Wired Mats (WR) and Mats (WR) have been specially developed to meet these challenging demands and offer optimum insulation properties even in the event of major temperature fluctuations due to stone wool’s high flexibility and mechanical strength.

Please consult the respective product data sheet for more information.

For high temperatures

Our products can provide long-lasting performance also at high temperatures and are resistant even at service temperatures of up to 700 °C, ensuring smooth operation.

Please consult the respective product data sheet for more information.

Stone wool – a super-flexible material

The insulation material for process boiler walls should be flexible enough to fill all cavities and strong enough to withstand temperature fluctuations. To prevent radiant heat within the insulation, aluminum foil should be placed between the insulation layers.

According to the requirements in many specifications, boilers should be insulated in multiple layers and the recommended insulation thickness should be between 200 and 300 mm in total. The aluminium-laminated PAROC Pro® Wired Mat (WR) 680 AL1 is suitable for the inner layer of the insulation system. The other layer(s) can consist of the same product or from PAROC® Pro Wired Mat (WR) 660, which has been specially developed for this purpose. An alternative for the outer layer is to apply PAROC® Pro Slab (WR) 640 or 660 to the underlying wired mat(s).

Special attention should be paid to indoor applications with elevated operating temperatures. When planning the insulation, the boiler type and the boiler manufacturer's specifications should be taken into account.

The right insulation for inner and outer boiler walls

We recommend securing the boiler wall insulation with self-locking washers on pins welded to the tin tubes. The insulating structure should then externally be protected with corrugated or profiled steel or aluminium cladding.

Based on our certifications to ISO 14025, ISO 21930 and EN 15804, we have received the Environmental Product Declaration (EPD) numbers NEPD-4100-3121-EN and NEPD-4101-3121-EN.

Insulation material for process boiler walls, 3D image

Products

Filter

Show All Filters

PAROC Calculus 

PAROC Calculus is a technical insulation calculation program for dimensioning thermal insulation for various applications in the HVAC and Process industries.

PAROC Calculus features:

• Easy-to-use interface; works on PCs, tablets, and cellphones

• Calculations of heat losses, surface temperatures, and temperature drop in pipes, ventilation ducts, process industry tanks, valves, and flanges

• Simple input of pipe diameters and duct dimensions (predefined)

• Correcting for thermal bridges of pipe and duct suspensions

• Print calculations as a PDF. Multiple simultaneous printouts in PDF are possible

• Saving projects and customizations (for registered users)

• Calculations based on the ISO 12241:2022 standard

Screenshot of Paroc Calculus software interface showing insulation calculation results for HVAC applications

Contact Paroc Technical Insulation