Stainless Steel Seamless Pipes & Welded Pipes: ASTM A 312, ASTM A213, ASTM A409, Material: SS304/L, SS316/L, or other special Stainless Steel Seamless Pipes & Welded Pipes: ASTM A 312, ASTM A213, ASTM A409,Material: SS304/L, SS316/L, or other special requested one.Stainless Steel Tube: Materail SS304/L, SS316/L Stainless Steel Pipes