Explanatory notes
… 7305.90 ‑ Other The tubes and pipes of this heading are obtained, for example, by welding or riveting preformed, … or gas wells, tubes for long distance waterlines or slurry mains for coal or other solid materials, tubes for piling or … the metal at the moment of fusion. After welding there is a raised bead of metal, the “weld bead”, which is clearly …