Roxul Industrial Insulation Process - Manual (Page 30)

Insulation of piping
Required insulation thicknesses
If the three insulation systems are compared,
taking into consideration similar heat losses,
clear advantages are seen with regard to the
insulation thicknesses with systems using pipe
sections or pipe wraps (mats). These do not use
spacers, in contrast to insulation systems made
using wired mats. The table below shows the
required insulation thicknesses taking into
account the following boundary conditions:
Medium temperature: 480 °F (250 °C)
Ambient temperature: 50 °F (10 °C)
Wind speed: 1.1 mph (5 m/s)
Cladding: Aluminum
Heat loss: 150 BTU/ft.hr (150 W/m)
Application of spacers in the case of wired mats
Pipe Diameter
Minimum Insulation Thickness
Pipe sections Pipe wraps (mats)
Wired mats
NPS
(inch)
Nominal diameter
Ø DN
Pipe diameter
(mm)
ProRox ® PS 960 NA ENERWRAP ® MA 960 NA
inch inch inch
2 50 60 1" n.a. n.a.
3 80 89 1" n.a. n.a.
4 100 108 1.5" n.a. n.a.
6 150 159 2" n.a. n.a.
8 200 219 2.5" n.a. 5"
10 250 273 3" n.a. 6"
12 300 324 4" 4" 7.5"
14 350 356 4.5" 4.5" 8"
Multiple layer insulation n.a. = not applicable
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