&&The good is a 250 Series Pump Trombone Assembly (product #02-A-0011) made of ASTM A106 grade B Seamless Pressure Pipe and AISI 1045 steel. The good is a component of a hydraulic cylinder which provides linear lift in an artificial lift system used to extract crude oil from deep in the ground to the surface. The equipment acts as an actuator for a bottom hole pump in the bottom of a well.

&&Section 10 of the Customs Tariff directs that classification of imported goods shall be determined in accordance with the General Rules for the Interpretation of the Harmonized System. Section 11 of the Customs Tariff states that in interpreting the headings and subheadings, regard shall be had to the World Customs Organization's (WCO) Explanatory Notes to the Harmonized Commodity Description and Coding System.&&&&General Interpretative Rule 1 (GIR 1) directs that titles of Sections, Chapters and sub-Chapters are provided for ease of reference only. For legal purposes, classification shall be determined according to the terms of the heading and any relative Section and Chapter Notes. Similarly, General Interpretative Rule 6 (GIR 6) directs that classification shall be determined according to the terms of those subheadings and any related Subheading Notes.&&&&In your request for an advance ruling you proposed tariff classification under 8421.21.00.00 which provides for centrifuges, including centrifugal dryers; filtering or purifying machinery and apparatus for liquids or gases. This tariff classification number is not appropriate.&&&&Heading 84.12 provides for other engines or motors. Explanatory Note (B)(3) to heading 84.12 lists hydraulic cylinders under hydraulic power engines and motors that are comprised of “…a brass or steel barrel and a piston operated by oil (or other liquid) under pressure applied on one side (single-acting) or on both sides (double-acting) of the piston, the energy of the liquid under pressure being converted into a linear motion ”.&&&&A part is defined in Memorandum D10-0-1, Classification of Parts and Accessories in the Customs Tariff, as “an identifiable component of an article, machine, apparatus, equipment, appliance or specific good which is integral to the design and essential to the function of the product in which it is used.” The 250 Series Pump Trombone Assembly is integral to the design and essential to the function of the hydraulic cylinder of which it forms a part.&&&&The 250 Series Pump Trombone Assembly meets the terms of heading 84.12.&&