8412.21.00.30 - Weld fused type

This HTS subcategory, 8412.21.00.30, specifically classifies hydraulic power cylinders that are of the "weld fused type." This design characteristic refers to cylinders where the barrel or casing is constructed by welding together formed metal sections, as opposed to being a single, seamless extrusion or having tie-rod construction. These cylinders are integral components in hydraulic systems, converting fluid pressure into linear mechanical force and motion.

Distinguishing this category from its sibling, 8412.21.00.15, is crucial. The "tie-rod type" category covers hydraulic cylinders that utilize tie rods to hold the end caps and cylinder barrel together. In contrast, the "weld fused type" relies on welding techniques to create a robust, often more compact, cylinder body, eliminating the need for external tie rods. This difference in construction impacts the cylinder's pressure rating, physical dimensions, and potential applications.

As a leaf node, this classification does not have further subdivisions. Therefore, classification under 8412.21.00.30 hinges on confirming the "weld fused" construction method of the hydraulic cylinder. Importers should carefully examine the physical characteristics and manufacturing processes of the hydraulic cylinders to ensure accurate classification, particularly when distinguishing from other linear acting hydraulic cylinders.