The important dimension that controls the strength and pressure rating of a tube is the wall thickness. There are stainless steel tubes of different classes based on the wall thickness. Generally, these wall thickness categories are divided into four schedules: 10, 20, 40, and 80. The higher the wall thickness, the more high the pressure ratings are. Therefore, such an application wil... https://www.tubotechinc.com/stainless-steel-seamless-tube-tolerances-sizes-and-weight-chart.pdf