Inside Diameter Controlled Pipes

​Manufacturing program for inside-diameter-controlled pipe

Vallourec boasts a full range of machining capabilities for inside-diameter-controlled pipes. The table below gives an overview of the related manufacturing program (please click image to enlarge):

 

A step less size range

The manufacturing program for hot-finished tubes covers inside diameters from 220 to 1,300 mm, outside diameters up to 1,500 mm and wall thicknesses from 18 to 270 mm (greater wall thicknesses on request). The special advantage of this program is the extremely tight tolerances that can be achieved for every product and dimension.
 

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Tolerances on inside diameter and wall thickness​ ​
Tolerances on inside diameter ​Tolerances on T for a T/d ratio
​d
 
​dmin
 
≤ ​0.03
 
​> 0.03
≤ 0.06
> ​0.06
≤ 0.12
> ​0.12
 
​​​​± 1 % or ​​​± 2 mm
whichever is the greater
​-0 +2 % or -0 +4 mm
whichever is the greater
​​​​± 20 %
 
​​​​± 15 %
 
​​​​± 12.5 %
 
​​​​± 10 %*
 

* For outside diameters D​ ≥ 355.6 mm it is permitted to exceed the upper wall thickness locally by a further 5 % of the wall thickness T

 

Tolerances on inside diameter and minimum wall thickness​ ​
Tolerances on inside diameter ​Tolerances on Tmin for a Tmin/d ratio
​d
 
​dmin
 
≤ ​0.05
 
​> 0.05
≤ 0.1
> ​0.1
 
​​​​± 1 % or ​​​± 2 mm
whichever is the greater
​-0 +2 % or -0 +4 mm
whichever is the greater
​​​​-0 +35 %
 
​​​​-0 +28 %
 
-0 +22 %
 

* For outside diameters D​ ≥ 355.6 mm it is permitted to exceed the upper wall thickness locally by a further 5 % of the wall thickness T

Tolerances for bored and turned tubes: D = ​​​​± 0.5 mm, d = ​​​​± 1.0 mm
For special applications closer tolerances are possible.