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Thermal Expansion of Steam Pipes - inches

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

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

Thermal Expansion of Steam Pipes
(inches per 100 ft Pipe)
150 0.75
200 1.15
250 1.6
300 2.0
350 2.4
400 2.9
450 3.3
500 3.8

Note! - to avoid unacceptable stress and damage in a steam pipe line - handle expansion properly.

Example - Expansion of Steam Pipe

Steam pipe - temperature expansion

A system is designed for pressure 120 psi with operating temperature 350 oF. As indicated in the table above (350 oF) the expansion is is approximately 2.4 in100ft pipe.

The expansion of a 90 ft long pipe can be calculated as

dl = ((2.4 in100ft) / (100 ft)) (90 ft)

    = 2.2 in

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Related Topics

  • Pipe Sizing

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

    Steam & condensate systems- properties, capacities, pipe sizing, systems configuration and more.

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