program
Výrobní program O firmě Certifikáty Ceník Kontakty
1. Pre-insulated Pipeline Systems
Introduction – General Information
Applied Materials
Medium-Conducting Pipeline
Insulating Layers
Outer Protective Layers
Pipeline and Fittings
PIP 130 A, B, C
PIP 180 A, B, C
PIP 210, 240, 270
PIP 300 A, B, C
Elbows, Branches, Reducers, Compensators, Fixed Points
Accessory Parts - Entries, Pipeline Ends, Expansion Cushions
Mounting Instructions for Pipeline Connection, Coupling Design
Safety Regulations
Handling, Storage
Planning Activity Documents
Earth Works
Thermal Losses of Distribution Systems – k-Coefficient
Heat Dilatation PIP
Solution of Heat Dilatation
Heat Tensioning of Pipeline
Axial Compensators
Steam Distribution System
Installation Length, Friction Forces, Pipe Cross-Sections
Monitoring System
2. Production Assortment of the Company IZO

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:

Zl1
ΔL2

sinα
 + 
ΔL1

tanα
        [mm] 

Zl2
ΔL2

tanα
 + 
ΔL1

sinα
        [mm] 

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.

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