Other tubes and pipes — HTS 7305
Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross sections, the external diameter of which exceeds 406.4 mm, of iron or steel
Chapter 73 › Heading 7305
2026 HTS Rev 19 Synced Rules verified Operational
Written to help non-specialists understand this page. Rates, dates, and legal facts come from the official records above and on the linked source.
HTS heading 7305 is a broad product category for certain large-diameter iron or steel tubes and pipes. It covers tubes and pipes with a circular cross section, an external diameter exceeding 406.4 mm, that are made by processes such as welding, riveting, or similar closing methods. The heading is for “other” tubes and pipes, so the product must first be distinguished from goods covered by other headings or more specific provisions.
To reach the correct 8-digit HTS code, start with the heading’s physical requirements, then use the subheadings to identify the relevant material and product type. Depending on the tariff structure, the final digits may distinguish qualities such as carbon or alloy steel, longitudinally or spirally welded construction, or other specified forms. Confirm the exact wording of each subheading against the current HTS and match it to the product’s documented specifications; classification may require a customs broker or binding ruling when the facts are unclear.
What to check
- Confirm that the tube or pipe has a circular cross section and measure the external diameter, not the internal diameter.
- Verify that the diameter exceeds the heading threshold and retain mill certificates, drawings, or other reliable measurement records.
- Identify the material precisely, including whether it is iron, carbon steel, or alloy steel, and check the applicable tariff definitions.
- Document how the pipe was made—such as longitudinal welding, spiral welding, riveting, or another closing method—and compare that fact with the subheading descriptions.
- Review the complete 8-digit code in the current HTS, including any statistical suffix, and ask a customs professional for help if material, construction, or heading coverage is uncertain.
HTS heading 7305 summary
Other tubes and pipes is a 4-digit product category containing 0 published product-code lines in this snapshot. A heading does not carry one universal duty rate; classification must be narrowed to the line matching the product facts.
How to find your code in this category
A heading is a product category. To get the exact duty, narrow from this 4-digit heading to a sub-category (usually by material), then open the 8-digit code that matches your product.
Open any code in the tables below to see its exact duty rate, a duty calculator (enter your shipment value → estimated duty and landed cost), the rate-change history chart, and the country-by-country breakdown (including Section 301/232 add-on duties).
Why you have to click in: a single category can contain products with very different duties. The rate depends on the specific product — its material and construction — and on the country of origin, and those only get pinned down at the 8-digit code level. That is why this page points you to codes instead of showing one rate for the whole category.
Sub-categories
| Code | Description |
|---|---|
| 7305.11 | Longitudinally submerged arc welded |
| 7305.12 | Other, longitudinally welded |
| 7305.19 | Other |
| 7305.20 | Casing of a kind used in drilling for oil or gas |
| 7305.90 | Other |
Common questions
What products fall under HTS heading 7305?
Other tubes and pipes (for example, welded, riveted or similarly closed), having circular cross sections, the external diameter of which exceeds 406.4 mm, of iron or steel. To classify a specific item you must pick the matching sub-category and 8-digit code above; the right choice usually depends on the material and construction of the product.
How do I choose the right code within this category?
Start from the sub-categories (typically divided by material—for example cotton versus man-made fibers), then open the active 8- or 10-digit code that matches the product. When unsure, a licensed customs broker or a CBP binding ruling can confirm the classification.
Reference information only, not customs, legal, or classification advice. Confirm the current code and rate against the official HTS before you import.