ASTM A312 Stainless Steel Seamless Pipe Specification
ASTM A312 standard specifies the specification range of stainless steel seamless pipes, with outer diameters ranging from 1/8 inch (6.4mm) to 30 inches (760mm), and wall thicknesses varying from standard (SCH 5S) to form XXS (SCH XXS) according to different pressure levels.