Technical data

21
Compressed Air Applications Manual | Pipework design and installation Compressed Air Applications Manual | Pipework design and installation
The design should treat the main pipe,
the distribution pipes, and the connecting
pipes separately.
Main pipe
For the main pipe (MP) we recommend
rigid installation up to d 63. As from size
d 75, bending or expansion sections are
appropriate.
Fixing points should be preferably be
located at the outgoing T-piece to the
distribution pipe.
There should always be a shutoff valve
installed at the MP outlet and at the
branching points. This allows shutting off
individual network sections without af-
fecting the entire compressed air supply.
Calculation of the bending section:
LBS = C x √ ∆L x d
C for PB = 10
∆L = LDS x α x ∆υ
α for PB = 0.130 mm/mK
Change of direction
LDS
LBS
∆L
GB
FP
FP
MP outlets to distribution pipe
MP branching point
Branch pipe
Expansion bend
FP
FP
FP
LDS
LBS
∆L
LDS
∆L
L
BS/2
LBS
FP
•
Fixing point
GB
=
Sliding support
∆L
Change in length
LDS
Expansion section
length
LBS
Bending section
length
α
Thermal expansion
coefficient
d
Outside pipe diam-
eter
C
Material factor
∆υ
Temperature dif-
ference