**Calculation of thermal expansion of pipelines** is performed to determine the increase in the length of the pipeline section during heating, the need to install compensators for temperature elongation, and to determine the required compensating capacity.

The increase in the length of a pipeline section due to temperature expansion can be determined using the following formula:

**dL = a · l · (t _{max} – t_{c})**, mm

**a** – The coefficient of linear thermal expansion, expressed in °C^{-1}, depends on the physical properties of the material.

**t _{max}** - the maximum temperature of the hot water in the pipeline, °C.

**t _{с}** - ambient temperature during pipeline installation, °C.

**l** - the length of the pipeline section, m.

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