Insulation of piping – Roxul Industrial Insulation Process User Manual
Page 32
Insulation of piping
1.2.1 Insulation with pipe sections
Generally, the best insulation is achieved using
ProRox
®
Pipe Sections. The sections can be used
up to temperatures of 1400 °F (760 °C) when
using ProRox
®
PS 980
NA
Type V insulation. They
are supplied ready split and hinged for quick
and easy snap-on assembly and are suitable for
thermal and acoustic insulation of industrial pipe
work. Their excellent fit and high compression
resistance means pipe sections can be applied
in a single layer without any additional spacers
or support structures. Consequently the number
of thermal bridges, which have a negative
influence on the insulation, is greatly reduced,
while a low thickness may be applied compared
to wired mats. The result is considerably reduced
installation time and costs. The lack of spacers
and “unforeseen” gaps minimizes heat loss and
the risk of personnel injuries due to hot spots on
the cladding.
At temperatures above 550 °F (300 °C), the
provisional application of spacers must be
determined in each individual case. ProRox
®
Pipe Sections are available in a wide range of
diameters, ranging from NPS 1/2" (23 mm) to
36" (914 mm)
Note
Due to their low thermal conductivity, better
thermal insulation values can be achieved
with pipe sections than with wired mats.
With insulation on straight pipe sections, a
combination of both products in the same
insulation thickness is therefore not advisable.
If this combination is essential, for example,
in the case of bends or shaped pieces, it is
vital to select the correct insulation thickness.
This is the only way to guarantee that no
unexpected, potentially hazardous surface
temperatures occur.
Insulation thicknesses to guarantee
protection against contact
The table below is an initial guide to help select
suitable insulation thicknesses for the guards.
It is based on the following boundary conditions:
Ambient temperature: 75 °F (25 °C)
Wind speed: 1.1 mph (0.5 m/s)
Cladding: Aluminum
Maximum surface temperature: 140 °F (60 °C)
Insulation: ProRox
®
PS 960
NA
pipe sections
Pipe Diameter
Temperature
NPS
(inch)
Nominal
diameter
Ø DN
Pipe
diameter
(mm)
<250 °F
(<120 °C)
300 °F
(150 °C)
350 °F
(175 °C)
400 °F
(200 °C)
450 °F
(230 °C)
500 °F
(260 °C)
550 °F
(290 °C)
600 °F
(315 °C)
inch
inch
inch
inch
inch
inch
inch
inch
1
25
33
0.5"
0.5"
0.5"
0.5"
1"
1"
1"
1"
2
50
60
0.5"
0.5"
0.5"
1"
1"
1"
1.5"
1.5"
3
80
89
0.5"
0.5"
1"
1"
1"
1.5"
1.5"
2"
4
100
114
0.5"
0.5"
1"
1"
1"
1.5"
1.5"
2"
6
150
168
0.5"
1"
1"
1"
1.5"
1.5"
2"
2"
8
200
219
0.5"
1"
1"
1.5"
1.5"
1.5"
2"
2.5"
10
250
273
0.5"
1"
1"
1.5"
1.5"
2"
2"
2.5"
12
300
324
0.5"
1"
1"
1.5"
1.5"
2"
2"
2.5"
The thicknesses mentioned above should be seen as an indication. In the event of differing boundary conditions, please
contact the ROXUL
®
Technical Services Team. The thermo-technical engineering program "ROCKASSIST" (coming soon)
or NAIMA 3E Plus
®
can be used to design the insulation according to the specific requirements.
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