Types of Flexible Thermal Insulation: Uses in Boilers, Ducts and Valves

Thermal insulation is essential in industrial facilities where steam, hot fluids, gases, or temperature-controlled processes are used. Proper insulation not only conserves energy but also protects personnel, prevents burns, reduces heat loss, and extends the lifespan of equipment.

The flexible insulation They are the best option when adaptability to irregular shapes or curved surfaces is required, such as pipes, valves, elbows, or equipment in confined spaces. These materials allow for easier installation, efficient maintenance, and better results under varying conditions.

Most common flexible thermal insulation materials

• Fiberglass

  It withstands temperatures up to 550°C. It is one of the most widely used materials due to its thermal and chemical resistance, as well as its ease of installation. It is available in blankets, tapes, cords, or fabrics. Ideal for pipes, valves, and surfaces exposed to moderate heat.

• Ceramic fiber

  Withstands temperatures up to 1260°C. Used in boilers, furnaces, combustion chambers, and high-temperature equipment. Available in blanket, paper, tape, or rope. Highly effective where conventional insulation fails.

• Fiberglass tape with aluminum

  It combines the thermal resistance of fiberglass with a reflective aluminum layer. It repels radiant heat and improves insulation efficiency. Used to protect ducts, connections, and areas exposed to sunlight or the elements.

• Expanded graphite

  Primarily used in thermal sealing gaskets, rather than as a volumetric insulator. Resistant to heat, steam, pressure, and chemical attack. Applied to valves, flanges, and critical points where sealing and protection are required.

• Mineral wool

  It is used in heating, ventilation, and industrial roofing systems. Although less flexible than fiberglass, its insulating power is very high and it has good fire resistance.

Typical applications

• Boilers and steam chambers

  Ceramic or fiberglass blankets are used to cover exterior surfaces and minimize heat loss. Expanded graphite or thermal cord is used for sealing at joints.

• Air or hot gas ducts

  They are covered with fiberglass blankets or tapes, often with an aluminum finish. This maintains the air temperature and protects areas exposed to the sun or weather changes.

• Valves and fittings

  They are insulated with removable ceramic or fiberglass covers. Thermal cords or gaskets are also used in areas requiring periodic maintenance.

• Flanges, pumps and turbines

  They are protected with flexible insulation to prevent heat loss, improve efficiency, and protect personnel. Flexible materials are combined with pressure-resistant heat seals.

Advantages of flexible insulation

• It easily adapts to complex geometries.
• It reduces energy losses.
• It increases staff safety.
• Improves operational efficiency.
• It requires little maintenance.
• It can be removed and reinstalled during maintenance.

At Suimtec, we offer a wide range of flexible thermal insulation solutions designed to fit boilers, ducts, valves, turbines, and general industrial equipment. Our products are manufactured with high-resistance materials that are thermally, mechanically, and chemically resistant, ensuring effective and long-lasting protection.