# Steel Pipes - 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.

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

#### Imperial Units

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.

#### Imperial Units

### L-Bends Expansion Compensator Calculator

#### Metric Units

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

#### Imperial Units

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

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

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Dimensions of ASTM A270 sanitary steel tubes.

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### Piping Materials - Temperature Expansion Coefficients

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

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### Restricted Thermal Expansion - Force and Stress

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### Sizing 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.