7304.22.00.45 - Having a wall thickness exceeding 9.5 mm

This HTS category, 7304.22.00.45, specifically covers seamless drill pipe made of stainless steel, intended for use in oil and gas drilling operations, which possesses a wall thickness exceeding 9.5 mm. These robust pipes are designed to withstand the extreme pressures and abrasive conditions encountered in deep well exploration. The "drill pipe" designation implies a specialized pipe that transmits rotational torque from the surface to the drill bit, a critical function in drilling operations.

Distinguishing this category from its sibling, 7304.22.00.30, is the precise physical characteristic of wall thickness. While both are stainless steel drill pipes used in oil and gas drilling with an outside diameter not exceeding 168.3 mm, this subcategory is exclusively for those with a wall thickness *greater than* 9.5 mm. This thicker wall construction signifies a higher tensile strength and enhanced durability, suitable for more demanding drilling applications.

As this is a leaf node within the HTS structure, there are no further subcategories. Classification at this level is determined by the combination of material (stainless steel), application (oil and gas drilling), type of pipe (drill pipe), construction (seamless), outside diameter limitation, and the specified wall thickness exceeding 9.5 mm. Proper identification of these physical attributes is crucial for accurate customs declaration and duty assessment.