What are the available sizes & wall thicknesses for your stainless steel pipes? Stainless steel pipe sizes and wall thicknesses are not the same for all pipes but depend on Nominal Pipe Size (NPS), schedule, and a particular dimension standard like ASTM A312. The sizes that are widely used can go from 1/8 inch NPS up to more than 24 inches in the case of welded pipes, while the thickness of the walls can change a lot, from less than 2 mm for Schedule 10S to over 9 mm for Schedule 40S and more for bigger, made-to-order dimension Factors Determining Size and Wall Thickness 1. Nominal Pipe Size (NPS): NPS is a way of defining pipe sizes that are standard. 2. Schedule: It is a number that tells the thickness of the wall, for example, Sch 10S, Sch 40S, or Sch 80S. 3. Standard: Different standards such as ASTM A312 specify the sizes of seamless and welded pipes. Get a detailed guide here: https://www.greatmetal.com/stainless-steel-seamless-pipe.html