HTS code 7306.21.40.00 covers "Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel › Welded of stainless steel › Other" under the US Harmonized Tariff Schedule. This is the official duty rate charged by US Customs when this product is imported into the United States, sourced directly from the U.S. International Trade Commission and refreshed daily.