Seamless tube is stronger,
and therefore more resistant to pressure and tension, than a tube with welded seam, that's because seamless tube is made from a solid bar of stainless steel rather than from a strip, that's rolled and welded into a tube, seamless stainless steel tube is used when reliability, is critical for example in aerospace engines, nuclear equipment and medical devices, and manufacturer purchases stainless steel tubes in a range of lengths,diameters and thicknesses, the engineers select the right starting size, for the specific tube the customer has ordered, each one is checked with a tape measure, and then a large micrometer to measure the outside dismeter, engineers swith to a small micrometer to measure the wall thickness
