Carbon Steel Weld Neck Flange 4 Inch from China
A 4-inch carbon steel weld neck flange designed for high-pressure piping systems in industrial applications. It features a tapered hub for welding to pipes and has an inside diameter of 102 mm, classifying it under HTS 7307.91.50.10 as a flange of iron or nonalloy steel less than 360 mm ID. Used in oil refineries and chemical plants for secure connections.
Duty Rate — China → United States
40.5%
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
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Import Tips
• Verify material certification to confirm nonalloy steel composition per ASTM A105 standards to avoid reclassification
• Include mill test reports (MTRs) in documentation; customs often requires proof of chemical analysis for iron/nonalloy steel
• Measure inside diameter precisely before shipment—errors over 360 mm shift to different subheading