Technical Parameters of the Air Conditioner Tubes Type F -12 A 20 HFC -134a A20 HFC -134a A10 Size 5/ 16” 13/ 32” 1/ 2” 5/ 16” 13/ 32” 1/ 2” 5/ 16” 7/ 16” 1/ 2” Nominal Bore mm 8 10 13 8 10 13 8 11.5 13 Bore Tolerance 8.2 ± 0.2 10.2 ± 0.2 12.7 ± 0.2 8.2 ± 0.2 10.5 ± 0.2 13 ± 0.2 8 ± 0.2 11.5 ± 0.2 12.9 ± 0.2 Outer diameters mm 18.8 ± 0.3 22.5 ± 0.3 23.2 ± 0.3 19 ± 0.3 23 ± 0.3 23 ± 0.3 15 ± 0.3 18.5 ± 0.3 21 ± 0.3 Working pressure Mpa 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 3.5 Explosion Pressure Mpa ≥ 12 ≥ 12 ≥ 12 ≥ 12 ≥ 12 ≥ 12 ≥ 12 ≥ 12 ≥ 12 Structure Woven polyester fiber reinforcing Aromatic polyester fibre reinforcing,nylon anti-permeation Permeation ≤ 1.96kg/m2/y Pulse 0-3.45Mpa over 200000times of impact