NT FIRE 021：钢结构绝缘材料防火性
NT FIRE 021：Insulation of steel structures: Fire protection
The test- and calculation method described is intended for insulation systems applicable to steel beams and columns. The insulation may be
intumescent paint, mineral wool slabs, sprayed mineral wool, vermiculite or calcium silicate slabs, reinforced gypsum slabs etc. Composite
insulation, in which the individual layers break down, may require the thermal resistance for each number of layers to be calculated instead of the thermal conductivity of the insulating material. The calculation method is not immediately applicable to - very dense materials, which protect by heat absorption rather than by insulation, e.g. concrete - combustible materials or materials which break down at a certain rate independent of the insulation temperature, e.g. wood cladding and gypsum slabs.
intumescent paint, mineral wool slabs, sprayed mineral wool, vermiculite or calcium silicate slabs, reinforced gypsum slabs etc. Composite
insulation, in which the individual layers break down, may require the thermal resistance for each number of layers to be calculated instead of the thermal conductivity of the insulating material. The calculation method is not immediately applicable to - very dense materials, which protect by heat absorption rather than by insulation, e.g. concrete - combustible materials or materials which break down at a certain rate independent of the insulation temperature, e.g. wood cladding and gypsum slabs.
