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          |  | Diameter (mm) | OD (mm) | Common pressure (Kg)
 | Damage to a minimum    pressure | Singlet | Minimum bend radius/mm±3mm |  
          | (g/m) |  
          | 1/4 | 6.2~6.6 | 8.22~9.46 | 232 | 552 | 122 | 81 |  
          | 5/16 | 7.9~8.3 | 10.31~11.71 | 194 | 540 | 155 | 131 |  
          | 3/8 | 10.2~10.6 | 12.73~14.18 | 162 | 450 | 185 | 182 |  
          | 1/2 | 12.9~13.4 | 15.72~16.73 | 139 | 425 | 220 | 211 |  
          | 5/8 | 15.9~16.3 | 18.57~20.18 | 101 | 385 | 252 | 252 |  |