Refractory glass wool is made of special raw materials with in house
process technology, available in boards or felts in rolls.  It is widely used
as thermal insulation and noise reduction for high temperature surfaces
such as boilers, chemical reaction vessels, pipings etc.  It is the material
of choice for insulation in power plants, chemical and pharmaceutical
industries.  
Refractory glass wool
Physical Properties
 Unit
 Index
 Standard
Density
 Kg/m³
 10 – 80
 GB 5480.3 – 1985
Average fiber diamer
 µm
 5
 GB 5480.4 –1985
Reshrinking Temperature
 °C
 500
 GB/T 11835 –1998
Thermal conductivity
 w/m•k
 0.041– 0.07
 GBT10294 – 1998
Combustibility grade
   non-combustible Grade A
 GB 8624 – 1997
Hydrophobicity
 %
 >99
 GB/T 10299 –1988
Installation guide:
Prior to installation of the glass wool insulation material, pins are welded to the surface of the equipment. The refractory
glass wool is covered over the surface of the equipment .If temperature of the equipment is above 250°C, double-layer heat
preservation protocol is recommended.  The seams of the outer and inner layers of glass wool should be staggered to
avoid heat loss due to the heat bridge formed. If temperature of the equipment exceeds 400°C, aluminum silicate for the
inner layer and refractory glass wool for the outer layer are recommended. A veneer of decorative aluminum foil or other
suitable material may be used for the exterior appearance.
Choice of insulation material for higher temperature surfaces
such as in boilers, pipings in chemical industry.
Available in panels or felt in rolls