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Piping Materials - Temperature Expansion Coefficients

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Expansion coefficients that can be used to calculate temperature expansion of pipes and tubes - are indicated in the table below:

Piping Materials - Temperature Expansion Coefficients
MaterialExpansion Coefficients
10-6 in/in oF

10-6 m/m oC
Aluminum 12.8 23.1
Carbon Steel 6.5 11.7
Cast Iron 5.9 10.6
Copper 9.3 16.8
Stainless Steel 9.9 17.8
ABS Acrylonitrile butadiene styrene 35.0 63.0
HDPE High density polyethylene 67.0 120.0
PE Polyethylene 83.0 150.0
CPVC Chlorinated polyvinyl chloride 44.0 79.0
PVC Polyvinyl chloride 28.0 50.4
  • in/in oF = 1200 in/100ft oF = 1.8 m/m oC

Note! The higher expansion coefficients for plastic materials makes plastic pipes and tubes extremely sensitive to temperature changes. Always pay attention to plastic pipes and tubes when temperature varies.

Example - Thermal Expansion of a PVC Pipe

A PVC pipe with length 6 m is heated from 0oC to 60oC.

 Expansion of the pipe can be calculated as

dl = (50.4 10-6 m/m oC) (6 m) ((60oC) - (0oC))

   = 0.018 m

   = 1.8 cm

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