Articles of Iron or Steel

Cast-iron tubes go under 7303. Seamless tubes and pipes of iron or steel (other than cast iron) fall under 7304. Large-diameter welded tubes with an external diameter over 406.4 mm go under 7305, while other welded and hollow-profile tubes fall under 7306. The key variables are the manufacturing method (seamless vs. welded), the external diameter, and whether the material is cast iron.

Yes — antidumping and countervailing duty orders cover numerous product groups in this chapter, including certain steel pipes, tubes, and fasteners from multiple countries. Importers should query the Commerce Department's ADD/CVD order database by HTS number and country of origin before entry, and should also check whether any applicable Section 232 measures interact with or are separate from those orders.