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Steam Pipes - Thermal Expansion

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

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Expansion of steam pipes when pressurized and heated from room temperature.

Thermal Expansion of Steam Pipes - inches

Operating Temperature (^oC)	Expansion (mm / 100 m Pipe)
66	63
93	96
121	136
149	166
177	203
204	246
232	279
260	323

Note! - to avoid unacceptable stress and damage of pipe lines - handle the expansion properly!

Example - Expansion of Steam Pipe

Steel pipe - temperature expansion

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A system is designed for pressure 10 bar with operating temperature approximately 180 ^oC. As indicated in the table above (177 ^oC) the expansion is is approximately 203 mm_100m pipe.

The expansion of a 35 m long pipe can be calculated as

dl = ((203 mm_100m) / (100 m)) (35 m)

= 71 mm

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Related Topics

Steam and Condensate - Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.
Pipe Sizing - Sizing of steam and condensate pipe lines - pressure loss, recommended velocity, capacity and more.

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Engineering ToolBox, (2003). Steam Pipes - Thermal Expansion. [online] Available at: https://www.engineeringtoolbox.com/temperature-expansion-steam-pipes-d_256.html [Accessed Day Mo. Year].

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