oventrop Copipe Mode D'emploi page 5

3.6 Change in length of pipe:
Temperature changes will effect the "Copipe" and it will
either expand or retract. The slight movement must not be
obstructed by the directions or positions of the pipe. To
avoid traction on the pipe or bending of the pipe, fixed points
must be set in the area where there are connection points
(illustration 6).
The linear coefficient of expansion is :
= 0.024 mm / (m · K)
The thermal conditional change in length can be calculated
with the following formula :
∆ L =
Formula
sign
Change in length ∆ L
Coefficient of
expansion
Length of pipe L
Difference in
∆ϑ
temperature
Example : ∆ L = 0.024 mm / (m · K) · 7 m · 60 K
∆ L = 10.1 mm
This result is also shown in the chart (opposite) under point 9.
This change in length may be compensated by e.g. the
insulation material absorbing this expansion. Unhindered
expansion is ensured in openly installed pipework through
the use of fixed point brackets and mobile brackets, for
instance with 90° pipe loops (point 8). The minimum length of
the loop is calculated by using the following formula:
BS = c · √
Formula
sign
Loop length BS
Material constant of
c
"Copipe" (= 33)
Outer diameter
D
of pipe
Change in length ∆L
Example : BS = 33 · √ (16 mm · 10.1 mm)
BS = 420 mm
This result is also shown in the chart (opposite) under
illustration 9.
4 Installation tools
The following Oventrop tools are available for fitting the
pipes:
Pipe cutter, pipe shears, universal tools for deburing and
calibrating, smoothing tool, pipe bending springs and pipe
bending tool.
5 Fixing materials
The following Oventrop products are available for the fixing
of the pipes:
various dowel hooks, pipe brackets, rosette covers.
6 Water content of pipework
The table under point 10 helps to determine the water
content of the pipework.
7 Additional information
Further information, e.g. regarding fire protection, can be
found in the Oventrop technical information sheets.
Please take note of the installation instructions for the
fittings and the operating instructions for the tools.
· L · ∆ ϑ
Values for
Unit
example
mm
mm / (m · K) 0.024
m 7
K 60
(D · ∆L)
Values for
Unit
examples
mm
– 33
mm 16
mm 10.1
8 Compensation of changes in length
9 Chart for Oventrop composition pipe "Copipe"
Determination of the thermal conditional change in length
and the required loop length
Pipe length
10 Inner volume, weight of pipe
Dimension Size
Ø 14 x 2,0 mm DN 10
Ø 16 x 2,0 mm DN 12
Ø 18 x 2,0 mm DN 15
Ø 20 x 2,5 mm DN 15
Ø 26 x 3,0 mm DN 20
Ø 32 x 3,0 mm DN 25
Ø 40 x 3,5 mm DN 32
Ø 50 x 4,5 mm DN 40
Ø 63 x 6,0 mm DN 50
Fixed point bracket
Mobile bracket
Change in length ∆ L [mm]
Inner volume Weight of pipe
0,079 l/m 1104 g/m
0,113 l/m 1125 g/m
0,154 l/m 1141 g/m
0,177 l/m 1185 g/m
0,314 l/m 1285 g/m
0,531 l/m 1393 g/m
0,855 l/m 1605 g/m
1,320 l/m 1742 g/m
2,042 l/m 1223 g/m
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