No that is not true! See here:JBA said:
Thermal expansion is the tendency of a material to expand or contract in response to changes in temperature. This is important for pipes because changes in temperature can cause the pipe to expand or contract, which can lead to structural damage or leaks.
The formula for calculating thermal expansion of a pipe is: ΔL = αLΔT, where ΔL is the change in length of the pipe, α is the coefficient of thermal expansion, L is the original length of the pipe, and ΔT is the change in temperature.
The coefficient of thermal expansion is a material property that can be found in reference tables or by consulting with the manufacturer of the pipe. It is typically measured in units of length per unit length per degree Celsius (or Kelvin).
The formula for thermal expansion can be used for most types of pipes, as long as the coefficient of thermal expansion is known. However, it may not be accurate for pipes made of materials with nonlinear thermal expansion behaviors.
To minimize the effects of thermal expansion on pipes, it is important to properly design and install the pipe system, taking into account potential temperature changes. Additionally, using materials with lower coefficients of thermal expansion or incorporating expansion joints can help mitigate the effects of thermal expansion.