242034 Tubes and pipes, of non-circular cross-section, welded, of an external diameter of = 406,4 mm, of steel

24203410 Tubes and pipes, of non-circular cross-section, hot or cold formed and welded, of stainless steel 24203430 Tubes and pipes, of square or rectangular cross-section, of a wall thickness <= 2 mm, hot or cold formed and welded, of steel other than stainless steel 24203450 Tubes and pipes, of square or rectangular cross-section, of a wall thickness > 2 mm, hot or cold formed and welded, of steel other than stainless steel 24203470 Tubes and pipes, of other non-circular cross-section than square or rectangular, hot or cold formed and welded, of steel other than stainless steel