What type of copper tubing is required for refrigeration systems?

In refrigeration systems, Type L copper tubing is chosen for its balance of strength, flexibility, and wall thickness, making it suitable for the pressures and temperatures encountered in these systems. Type L has a thicker wall than Type M, which provides better durability and resistance to mechanical damage and is critical when dealing with refrigerant pressures. This type of tubing also offers improved insulation properties, which helps maintain efficiency within the system.

Type K is primarily used for underground applications due to its thicker wall and is not typically necessary for standard refrigeration services. Type M, while it is lighter and less expensive, does not provide the same level of durability required in refrigeration, making it less ideal for high-pressure environments. Type R is not a standardized type of copper tubing used in refrigeration applications. Therefore, Type L is the most appropriate choice for refrigeration systems, providing the necessary strength and performance characteristics needed.