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# Steel Pipes - Calculate Thermal Expansion Loops

The expansion loop is a common way to absorb temperature expansion and contraction in steel pipes. Expansion loops can be fabricated from standard pipes and elbows.

Approximate Expansion Capacity (mm)
Nominal Pipe Size
(mm)

Width of Expansion Loop - w - (m)
0.51.01.52.02.5
25 35 130
32 25 100 210
40 20 70 150
50   65 125 200
65   50 100 150 220
80   40 75 125 190
100   35 65 115 150

### U-Bends Expansion Compensator Calculator

#### Metric Units

This calculator can be used to calculate required width and height of an U-bends expansions compensator.

S - Length of expanding pipe (m)

Expansion coefficient (10-6 m/m oC)

Initial temperature (oC)

Final temperature (oC)

Outside diameter of pipe (mm)

#### Imperial Units

S - Length of expanding pipe (ft)

Expansion coefficient (10-6 in/in oF)

Initial temperature (oF)

Final temperature (oF)

Outside diameter of pipe (in)

The U-loops calculation is based on equation

w = 0.015 (dl D)1/2       (1)

where

w = width of loop (m)

dl = α dt S = temperature expansion (m)

α = temperature expansion coefficient (m/m oC)

dt = temperature change (oC)

S = length of expanding pipe (m)

D = diameter of pipe (m)

The offset of the loop is 2 w. The length of the loop is 5 w.

### Z-Bends Expansion Compensator Calculator

#### Metric Units

This calculator can be used to calculate required offset in a Z-bends expansions compensator.

S - Length of expanding pipe (m)

Expansion coefficient (10-6 m/m oC)

Initial temperature (oC)

Final temperature (oC)

Outside diameter of pipe (mm)

#### Imperial Units

S - Length of expanding pipe (ft)

Expansion coefficient (10-6 in/in oF)

Initial temperature (oF)

Final temperature (oF)

Outside diameter of pipe (in)

### L-Bends Expansion Compensator Calculator

#### Metric Units

This calculator can be used to calculate required offset in a Z-bends expansions compensator.

Smax - Length of longest expanding leg (m)

Expansion coefficient (10-6 m/m oC)

Initial temperature (oC)

Final temperature (oC)

Outside diameter of pipe (mm)

#### Imperial Units

This calculator can be used to calculate required offset in a Z-bends expansions compensator.

Smax - Length of longest expanding leg (ft)

Expansion coefficient (10-6 in/in oF)

Initial temperature (oF)

Final temperature (oF)

Outside diameter of pipe (in)

The L-loop calculation is based on equation

L = 0.063 (dl D)1/2       (2)

where

L = length of loop (m)

## Related Topics

### • Pipe Sizing

Sizing of steam and condensate pipe lines - pressure loss, recommended velocity, capacity and more.

### • Temperature Expansion

Thermal expansion of pipes and tubes - stainless steel, carbon steel, copper, plastics and more.

## Related Documents

### ASTM A270 Sanitary Stainless Steel Tubing - Dimensions

Dimensions of ASTM A270 sanitary steel tubes.

### Copper Tubes - Expansion Loop Capacity

Capacity of copper tubes expansion loops.

### Copper, Ductile Iron, Carbon Steel, Stainless Steel and Aluminum Piping Materials - Temperature Expansion

Thermal expansion of typical piping materials.

### Fixed Pipes - Stress vs. Change in Temperature

Temperature changes introduces stress fixed pipes.

### Linear Thermal Expansion

Online linear temperature expansion calculator.

### Metals - Temperature Expansion Coefficients

Thermal expansion coefficients metals.

### Pipes and Tubes - Temperature Expansion

Pipes expands when heated and contracts when cooled and the expansion can be expressed with the expansion equation.

### Piping Elbows - Thrust Block Forces

Thrust block forces on pipe bends anchors due to liquid velocities and internal pressures - online resulting force calculator.

### Piping Materials - Temperature Expansion Coefficients

Temperature expansion coefficients for materials used in pipes and tubes like aluminum, carbon steel, cast iron, PVC, HDPE and more.

### Piping Materials - Temperature Heat Expansion and Cooling Contraction

Expansion and contraction when cast iron, carbon and carbon molybdenum steel, wrought iron, copper, brass and aluminum pipes are heated or cooled.

### Pressfit Pipes - Expansion Loops

Temperature expansion loops with pressfit piping.

### PVC Pipes - Temperature Expansion Loops

Calculate temperature expansion and contraction in PVC piping systems.

### PVC, CPVC, Carbon Steel, Stainless Steel and Fiberglass Pipes - Thermal Expansion Diagrams

Thermal expansion of PVC, CPVC, Carbon and Stainless Steel and Fiberglass pipes.

### Restricted Thermal Expansion - Force and Stress

Stress and force when thermal expansion a pipe, beam or similar is restricted.

### Sizing of Steam Pipes (lb/h)

Steam is a compressible gas where the capacity of a pipe line depends on the size of the pipe and the steam pressure.

### Steam Pipes - Sizing

Sizing of steam pipe lines - major and minor loss in steam distribution systems.

### Steam Pipes - Thermal Expansion

Thermal expansion of steam pipes heated from room temperature to operation temperature (mm pr. 100 m pipe).

### Steel Pipes - Temperature Expansion

Calculate temperature expansion with carbon steel pipes.

### Thermal Expansion - Linear Expansion Coefficients

Linear temperature expansion coefficients for common materials like aluminum, copper, glass, iron and many more.

### Thermal Expansion of Steam Pipes - inches

Expansion of steam pipes heated from room temperature to operation temperature.

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