3917.22.00.00 - Of polymers of propylene

This HTS category, 3917.22.00.00, specifically classifies rigid tubes, pipes, and hoses manufactured from polymers of propylene. These articles are typically characterized by their semi-rigid or rigid form, which allows them to maintain their shape without external support. Examples include rigid propylene pipes used in plumbing systems, irrigation, and industrial fluid transport, as well as rigid tubing for specialized applications.

Distinguishing this category from its siblings is crucial for accurate classification. While all fall under rigid plastic tubes, pipes, and hoses (3917.2), 3917.22.00.00 is exclusively for those made from propylene-based polymers. This differs from 3917.21.00.00 (ethylene polymers, such as polyethylene), 3917.23.00.00 (vinyl chloride polymers, like PVC), and 3917.29.00 (other plastic polymers, which serve as a residual category). The material composition, therefore, is the primary differentiating factor at this level.

As this is a leaf node in the HTS, there are no further subdivisions within this specific classification. Classification decisions therefore hinge on confirming that the article is indeed a rigid tube, pipe, or hose and that its primary constituent polymer is propylene. Any deviation in rigidity or the type of polymer would necessitate classification under a different HTS code.