What piping materials should be used for R410A refrigerant systems?

Use refrigerant pipes made of phosphorus deoxidized copper with specific radial thickness ratings depending on the pipe diameter. For pipes smaller than ø19.05 (3/4"), use 1/2H-material (Drawn) pipes unless the radial thickness is at least 1.2t. Keep the inner and outer surfaces clean and free of contaminants such as sulfur, oxides, dust, dirt, shaving particles, oil, and water. (Page 5)