4009 - Tubes, pipes and hoses, of vulcanized rubber other than hard rubber, with or without their fittings (for example, joints, elbows, flanges):

This HTS category, 4009, encompasses a wide range of flexible conduits, specifically tubes, pipes, and hoses, manufactured from vulcanized rubber. The "vulcanized rubber" specification excludes products made from hard rubber. It's important to note that this heading also includes such rubber conduits when they are equipped with fittings like joints, elbows, or flanges, which are integral to their function and installation.

When classifying goods within Chapter 40, understanding the distinctions between headings is crucial. While other headings in Chapter 40 may cover raw rubber materials or specific articles of rubber, 4009 is dedicated to the shaped, tubular forms designed for the conveyance of fluids or gases. Its sibling categories, such as those in Chapter 1 (Live Animals) or other chapters, cover entirely different product types, making 4009 distinct by its material composition (vulcanized rubber) and its form (tubes, pipes, and hoses).

The subcategories within 4009 serve to further refine the classification based on the construction and reinforcement of these rubber conduits. These subdivisions distinguish between products that are solely of rubber, those reinforced exclusively with metal components, those reinforced solely with textile materials, and those combined with other materials. This granular breakdown is essential for accurate tariff application, as the presence and type of reinforcement can impact import duties and regulatory requirements.