Expansion coefficients for common materials used in pipes and tubes - aluminum, carbon steel, cast iron, PVC, HDPE and more
Expansion coefficients that can be used to calculate temperature expansion of pipes and tubes - are indicated in the table below:
|10-6 in/in oF|
|10-6 m/m oC|
|ABS Acrylonitrile butadiene styrene||35.0||63.0|
|HDPE High density polyethylene||67.0||120.0|
|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