Roxul Industrial Insulation Process - Manual (Page 37)

1.2.4 Insulation support
A. Spacers
The purpose of spacers is to keep the cladding at
a predetermined distance from the pipe. Spacers
are essential when the insulation (e.g. wired mats)
cannot bear the mechanical load of the cladding.
The use of spacers is generally not necessary
if pipe sections or pipe wraps (mats) are used.
Consideration should be given to support
structure or spacers on pipes where mechanical
loading (e.g. strong vibrations) of the insulation is
expected and/or the temperature is higher than
550 °F (300 °C).
Spacer rings usually consist of metal rings on
which the sheet cladding rests, and metal or
ceramic bars used as spacers, which rest on the
pipe. Elastic spacers such as Omega clamps are
frequently used to reduce the transference of
vibrations. With steel spacers, apply at least three
bars, whereby the maximum distance – measured
as circumference of the external ring – must be a
total of maximum 16 inch (400 mm). With ceramic
spacers, apply at least four bars at a maximum
permissible distance of 16 inch (400 mm).
Dimension spacers of support construction
The number of spacers depends on the insulation,
temperature and the mechanical load. Use the
following intermediate distances as a guide.
Insulation
system
Horizontal
piping
Vertical
piping
≤ 550 °F > 550 °F ≤ 550 °F > 550 °F
Pipe sections none 10 to 13 ft none 16 to 20 ft
Load bearing wraps (mats) none 10 to 13 ft none 16 to 20 ft
Wired mats 3.3 ft 3.3 ft 3.3 ft 16 to 20 ft
The spacers on pipes are located under the
circular joint of the cladding. On shaped sections
such as pipe elbows, spacers are fitted at the start
and at the end. If the external distance between
the two spacers exceeds 27 inch (700 mm), place
additional spacers between the two.
1.2 Insulation of piping
1. Pipe - 2. ProRox ® insulation - 3. Spacer - 4. Thermal
dividing layer - 5. Support ring
m
ax
. 1
6"
(4
00
m
m)
1. Pipe - 2. ProRox ® insulation - 3. Spacer - 4. Thermal
dividing layer - 5. Cladding
m
ax
. 2
7"
(7
00
m
m)
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