3917.23.00.00 - Of polymers of vinyl chloride

This HTS category, 3917.23.00.00, specifically encompasses rigid tubes, pipes, and hoses manufactured from polymers of vinyl chloride. These items are characterized by their inherent stiffness and are commonly used for conveying fluids or gases. The classification hinges on the primary polymer used in their construction, meaning articles made predominantly from PVC (polyvinyl chloride) resin fall within this heading.

Distinguishing this category from its siblings, 3917.21.00.00 (of polymers of ethylene) and 3917.22.00.00 (of polymers of propylene), relies solely on the identification of the specific vinyl polymer. While all are rigid plastic tubes and pipes, their material composition is the defining factor. If the rigid tube or pipe is not made from ethylene, propylene, or vinyl chloride polymers, it would be classified under the residual category, 3917.29.00, for tubes of other plastics.

As a leaf node, this category does not have further subcategories. Therefore, the classification of a rigid tube, pipe, or hose at this level is determined by the definitive presence of vinyl chloride as the primary polymer. Examples include rigid PVC conduit for electrical wiring, PVC plumbing pipes for water supply, or rigid PVC tubing used in industrial applications. The key is the material composition of the rigid form.