High-Density Rock Wool Boards With Stable Performance For Power
Plant Pipe Insulation
Rock wool boards are produced using natural minerals like basalt as
raw materials. The rocks are melted at high temperatures, then spun
into fibers via centrifugal force. The density of rock wool board
is the key indicator determining its performance and application.
Products with different densities show significant differences in
strength, insulation properties, and cost. High-density rock wool boards have a density of 120-200 kg/m³. In power plant facility insulation, rock wool boards offer more
precise alignment with the core demands of high temperatures, high
safety standards, and high durability in power plants compared to
common insulation materials such as polyurethane foam, glass wool,
and extruded polystyrene (XPS) boards. Their advantages are
primarily reflected in following key dimensions.
Excellent Performance
The fibers are tightly interwoven, with low shrinkage rate at high
temperatures, and the fire resistance rating can reach 2-4 hours,
making them suitable for long-term load-bearing or high-temperature
environments. They also have strong aging resistance and weathering
resistance, with a long service life (usually ≥20 years). Their
advantages include high strength and high stability, making them
usable as load-bearing insulation materials suitable for scenarios
with high requirements for structural strength. Our products have
outstanding fire resistance and safety, being not easily deformed
at high temperatures, making them ideal materials for firewalls and
fire barriers. Meanwhile, they have good weather resistance, being
able to be directly exposed to the outdoors (for a short period) or
humid environments, such as underground garages, without additional
reinforcement.
Insulation Efficiency and Cost-effectiveness
At room temperature, rock wool’s thermal conductivity (0.036–0.042
W/(m·K)) is slightly higher than polyurethane’s. But above 200°C,
organic materials’ conductivity spikes sharply, while rock wool’s
remains stable. Despite costing 20–30% more upfront than glass
wool, rock wool lasts 15–20 years with minimal maintenance—proving
cheaper long-term than polyurethane (5–8 years) and glass wool (3–5
years), both of which need frequent replacement.
Adaptability and Sound Insulation
Rock wool can be shaped into curves, pipe casings, and other forms
to fit irregular equipment like pipelines and boilers snugly,
reducing thermal bridging. Its fibrous structure absorbs 80–90% of
high-frequency noise, outperforming polyurethane and XPS (30–50%
absorption). Glass wool absorbs sound well too, but its fibers shed
easily and require extra protective layers.
