Seamless or Welded Specifications and Steel Grade: ASTM A312; ASTM A213; ASTM A249; ASTM A268; ASTM A269; ASTM A554; ASTM A789 GB/T 14975; GB/T 12771; GB/T 13296; GB/T 12770; GB/T 14976 TP 304; TP 304L; TP 316; TP 316L; TP 321; TP 317L; 309S; 310S Size Range: Seamless Series: OD: 6 - 762 mm; Thickness: 0.5 - 50 mm Welded Series: OD: 6 - 2600 mm; Thickness: 0.3 - 30 mm Sanitary Tubing: 1/8" - 6"