Explanatory notes
… products obtained by riveting, the abutting edges are overlapped and joined by rivets. The products of this … reinforced with rings. * * * The heading does not cover : (a) Tubes, pipes and hollow profiles, of heading … Subheadings 7305.11, 7305.12, 7305.19 and 7305.20 The provisions of the Explanatory Note to subheadings 7304.11, …