ISO-dimensions and tolerances for seamless tubes

Cold Finished Tubes
Tolerances
Outside diameter     on agreement
EN ISO tolerance class D2 D3 D4
Permissible deviation ± 1.0 % (min. ± 0.5 mm) ± 0.75 % (min. ± 0.3 mm) ± 0.5 % (min. ± 0.1 mm)
Wall thickness      
EN ISO tolerance class   T3  
Permissible deviation   ± 10.0 % (min. ± 0.2 mm)  
Legend    
Vertical:   Outside diameter (mm)*
Horizontal:   Wall thickness (mm)*
    *Other diameters and/or wall thicknesses on request