# 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) | ||||

0.5 | 1.0 | 1.5 | 2.0 | 2.5 | |

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 ^{o}C) *

* Initial temperature ( ^{o}C)*

* Final temperature ( ^{o}C)*

* Outside diameter of pipe (mm)*

#### Imperial Units

*S - Length of expanding pipe (ft)*

* Expansion coefficient (10 ^{-6} in/in ^{o}F) *

* Initial temperature ( ^{o}F)*

* Final temperature ( ^{o}F)*

* 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 ^{o}C)*

*dt = temperature change ( ^{o}C)*

*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 ^{o}C) *

* Initial temperature ( ^{o}C)*

* Final temperature ( ^{o}C)*

* Outside diameter of pipe (mm)*

#### Imperial Units

*S - Length of expanding pipe (ft)*

* Expansion coefficient (10 ^{-6} in/in ^{o}F) *

* Initial temperature ( ^{o}F)*

* Final temperature ( ^{o}F)*

* 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.

*S _{max} - Length of longest expanding leg (m)*

* Expansion coefficient (10 ^{-6} m/m ^{o}C) *

* Initial temperature ( ^{o}C)*

* Final temperature ( ^{o}C)*

* Outside diameter of pipe (mm)*

#### Imperial Units

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

*S _{max} - Length of longest expanding leg (ft)*

* Expansion coefficient (10 ^{-6} in/in ^{o}F) *

* Initial temperature ( ^{o}F)*

* Final temperature ( ^{o}F)*

* 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

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### Metals - Temperature Expansion Coefficients

Thermal expansion coefficients metals.

### Pipes and Tubes - Temperature Expansion

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### 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

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### 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.