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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).

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

Steam Pipes - Thermal 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

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 mm100m pipe.

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

dl = ((203 mm100m) / (100 m)) (35 m)

    = 71 mm

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