Grade K55 Oil Well Casing from China
Grade K55 casing is a welded non-alloy steel pipe designed for intermediate oil well sections, offering higher collapse resistance than J55 grades. Classified under HTS 7306.29.2000 as 'other' iron/nonalloy steel casing for drilling, it supports cementing and pressure containment in drilling operations. Threads are typically BTC (Buttress Threaded and Coupled) for secure joints.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• Include hydrostatic test certificates proving pressure ratings suitable for drilling casing use
• Label clearly as 'oilfield casing' to prevent misclassification as line pipe under Chapter 73 headings