6.7.2 Deflection legs
A deflection leg is the freely moveable pipe length, which
can take up the required thermal length changes. The
length of the deflection leg is influenced mainly by the
material (material constant C).
Deflection legs result mostly from changes in direction of
the piping. For long piping lengths, additional deflection
legs must be installed in the piping to compensate the
thermal length changes.
G
G
G
G
F
F
Deflection leg
F
L
DL
L
x
x
Fig.
6-12 Deflection legs
L
DL
Length of deflection leg
Thermal length change
L Pipe length
x Minimum distance of the pipe from the wall
F
G
Fixed/anchor point (tight)
Gliding point (loose)
Do not fit pipe support channels or pipe brackets
on deflection legs as this would restrict their
flexibility.