Seamless Stainless Steel Pipe Standard:321, 304, 304L, 316, 316L, 347, 310S; Standard: GB/T14975/14976, GB13296, ASTM A213/A312 Seamless Stainless Steel Pipe(1)Steel standard: GB/T14975 ... , GB/T14976, GB 13296, ASTM A213, ASTM A312; (2)Steel grade: 321(0Cr18Ni10Ti), 304(0Cr18Ni9), 304L ...