The pipes range in dimensions according to the ASTM, ASME and API standards with specifications in ASTM A213, A249 and A269. There are welded as well as seamless pipes. The Stainless Steel Seamless Pipe is dimensionally more accurate than the welded pipes. The pies range in nominal bore sizes from 1/8 inches to 30 inches, and 0.35mm to 6.35 inches in outer diameter and wall thickness ranges from 0.1mm to 1.2mm.
Most Common Types of Stainless Steel Seamless Tube:
SS 304(L)
304 is the most used standard commercial grade as it has good corrosion resistance and good machinability.
SS 316(L)
316 has much better corrosion resistance and is the grade recommended for marine environments or coastal applications.