Copper tubing used for refrigerant piping of mechanical refrigeration systems shall be commercially designated as?

Copper tubing used for refrigerant piping in mechanical refrigeration systems is commercially designated as Type L. This designation is important because Type L copper tubing has thicker walls compared to Types K and M, making it better suited for handling the pressures and environmental conditions associated with refrigeration systems.

Type L is often used for refrigerant lines because it provides a good balance between strength and flexibility, allowing it to withstand operating pressures while being easier to install than Type K, which is thicker and typically used for applications like water supply lines where mechanical integrity is paramount. Type M, on the other hand, has thinner walls and is generally used for lower pressure applications, which makes it less suitable for refrigerants that require more robust tubing.

Selecting the appropriate type of copper tubing ensures the longevity and reliability of the refrigeration system while complying with industry standards and safety regulations.