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 ... 321, 304, 304L, 316, 316L, 347, 310S Seamless Stainless Steel Pipe