Compensating Body L
After the heat dilatation calculation, i.e. ΔLx in the given diagram, we subtract the length "Z" of the movable arm for a relevant dimension.
Compensating Body Z
Analogically as at the compensating body L we calculate ΔLx compensating length. The movable arm length Z = 2 x is determined from the diagram.
Compensating Body U
Analogically as at compensating bodies L and Z we calculate ΔL and determine the length of the arm Zfrom the diagram. Connecting line between the arms marked 2 x must have minimal length 2/3 Z.
Use of Expansion Cushions
In course of realization of compensating bodies L, Z, U it is necessary to secure space for dilatation possibility in case of channelless bedding. For this the expansion cushions are used, which are fixed on the PE slip conduit.
Number of layers and lining length of the movable arm depends on specific values calculated or read from diagrams.
For ΔL ‹ 30 mm 
one layer is applied 
For ΔL 30 ~ 60 mm 
two layers are applied 
For ΔL 60 ~ 90 mm 
three layers are applied 
Lining length depending on the movable arm length
Length of movable 
Lining Length 
ΔL ‹ 30 mm 
ΔL 30 ~ 60 mm 
ΔL 60 ~ 90 mm 
1,0 ~ 1,5 m 
1 m 
 
 
1,5 ~ 2,5 m 
2 m 
2 + 1 
 
2,5 ~ 3,5 m 
3 m 
3 + 2 
3 + 2 + 1 
3,5 ~ 4,5 m 
4 m 
4 + 3 
4 + 3 + 2 
4,5 ~ 5,5 m 
5 m 
5 + 4 
5 + 4 + 3 
6,5 ~ 7,5 m 
6 m 
6 + 4 
6 + 5 + 4 
7,5 ~ 8,5 m 
7 m 
7 + 5 
7 + 6 + 4 
8,5 ~ 9,5 m 
8 m 
8 + 6 
8 + 7 + 5 
9,5 ~ 10,5 m 
 
9 + 6 
9 + 7 + 5 
10,5 ~ 11,5 m 
 
 
10 + 9 + 7 

Example: For arm length 4 m at dilatation ΔL 40 mm: 
4 + 3 m 
 
the subsequent layer covers 3/4 of the previous length 
For solving of compensating conditions can be used other change in routing, too, i.e. not only angles with turn 90°, but also smaller – i.e. up to 45°. Angles up to 450 cannot be used for compensation solving for strength reasons.
By means of calculation we check up tension conditions in the pipeline:
Length of the movable arms on the basis of the calculated dilatation can be read in diagram for compensating body L
For change in direction may be used angular deviation in the welded joint with the angle corresponding to root space, i.e. 4° up to DN 80 etc.
