Isolation Conductivité thermique    

Conductivité thermique matériau du tuyau et matière isolante



Conductivité thermique matériau du tuyau


Matériau de tuyau Conductivité thermique  
  W/(m K) ºC
PVC-U 0.15 23
PP 0.17 23
PVDF 0.19 23
PE 100 0.38 23
PE 80 0.43 23
Verre 0.81 20
Acier noir 57 20
Acier inoxydable 14 20
Cuivre 384 20
lambda Stahl = f(T)

Conductivité thermique matière isolante


The operational thermal concuctivity of an insulation layer is derived from its practical thermal conductivity and supplementary values for insulation-related thermal bridges, eg. support structures and fixings for insulation materials (insulation of vessels). [VDI 2055, S. 36, S. 148 ff.]. For pipes the practical thermal concuctivity can be used as operational thermal conductivity. Following reference values are taken from [VDI 2055, S. 154 ff.].

Insulating material Practical thermal conductivity in W/(m K)
Mean temperature [ºC] -150 -100 -50 0 50 100 200 300
Mineral wool quilted, e.g. on wire mesh apparent density >= 80 kg/m³         0.045 0.05 0.075 0.1
Mineral wool mouldings (sleeves, segments)       0.035 0.04 0.05 0.07 0.1
Cellular glass compressive strength > 0.5 N/mm² 0.02 0.025 0.031 0.04 0.05 0.06 0.085 0.11
Cellular glass compressive strength > 0.7 N/mm² 0.03 0.035 0.04 0.045 0.055 0.065 0.09 0.12



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