Vallourec offers steel tubes with specified minimum wall thicknesses according to ASTM standards. The manufacturing program for outside diameters up to 177.8 mm and minimum wall thicknesses up to 27 mm is listed in the table below
(please click the image to enlarge):
Intermediate sizes are available on request.D = Outside diameterTmin = Minimum wall thickness
The diameter and the wall thickness of the tubes shall be within the tolerance limits given respectively in this tables in case of ordering tubes in outside diameter and minimum wall thickness.
*= tighter tolerances upon requestNote: for OD > 76.2 mm (3") wall thickness tolerances according to ASTM standards.
For superheaters and reheaters, with an outside diameter from 38.1 to 76.1 mm, suitable for highly corrosive environments and supercriticial conditions (above 550°C and 250 bar), Vallourec provides austenitic stainless steels tubes produced by Tubacex SA under strategic agreement.