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6-2. Refrigerant piping installation
6-2-1. Piping materials and joints used
For t
(1) Copper pipes
It i
NOTE
6-6. Instructions for re-use piping of R22 or R407C
Table 6-2-1 Thicknesses of annealed copper pipes
Table 6-2-2 Minimum thicknesses of socket joints
Wall thickness (mm)
Nominal diameter Outer diameter (mm) R410A or R32 R22
6.4 0.80 0.80
12.7 0.80 0.80
15.9 1.00 1.00
Nominal diameter
Reference outer diameter of
copper pipe jointed (mm)
Minimum joint thickness
(mm)
6.4 0.50
12.7 0.70
15.9 0.80
(2) Joints
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