Seamless tubes (7608100030) are produced by extrusion or drawing without a weld seam, making them preferred for pressure-bearing, high-purity fluid, and precision applications. Non-seamless tubes (7608100090) are typically welded and used in lower-pressure or structural applications. Beyond classification, the distinction affects which antidumping orders may apply — some orders are limited to seamless or to welded product — so confirming the manufacturing method with the supplier is essential before entry.

Yes. All aluminum product imports are broadly subject to Section 232 tariffs. Additionally, antidumping and countervailing duty orders have historically covered aluminum extrusions and certain tube products from China; importers should check the current scope of any applicable orders with CBP or a licensed customs broker, as scope determinations for tube versus extrusion classifications can be fact-intensive.