Tubes — HTS 7304
Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel
Chapter 73 › Heading 7304
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 7304 is a broad product category for seamless tubes, pipes, and hollow profiles made of iron (other than cast iron) or steel. “Seamless” means the product is made without a welded or brazed longitudinal seam. The heading can cover products used for conveying fluids, structural purposes, mechanical applications, and other uses, depending on the detailed tariff provisions.
To narrow a product to an 8-digit HTSUS code, start with the product’s objective characteristics—not its marketing name. Review the material (such as the type of steel), whether it is stainless or another alloy, the cross-sectional form, and the intended or specified use where the tariff provisions call for it. The additional digits divide the heading into more specific subheadings and statistical reporting categories, so confirm the complete code and its current description in the official HTSUS.
What to check
- Confirm that the product is truly seamless and is not welded, brazed, or otherwise joined along its length.
- Identify the material precisely, including whether it is stainless steel, alloy steel, or non-alloy steel, using mill certificates or technical specifications.
- Record the product’s form, such as tube, pipe, or hollow profile, along with outside diameter, wall thickness, and cross-sectional shape.
- Check whether the tariff language distinguishes the product by use, such as line-pipe, casing, tubing, structural use, or mechanical applications.
- Compare the product’s specifications with the relevant 8-digit HTSUS descriptions and notes; ask a customs broker or request a formal classification ruling if the distinctions are unclear.
HTS heading 7304 summary
Tubes is a 4-digit product category containing 4 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 |
|---|---|
| 7304.19 | Other |
| 7304.23 | Other drill pipe |
| 7304.24 | Other, of stainless steel |
| 7304.29 | Other |
| 7304.31 | Cold-drawn or cold-rolled (cold-reduced) |
| 7304.41 | Cold-drawn or cold-rolled (cold-reduced) |
| 7304.51 | Cold-drawn or cold-rolled (cold-reduced) |
| 7304.59 | Other |
| 7304.90 | Other |
Product codes & duty rates
👇 Each row is a specific product code — click a blue code to open its full page with exact duty rates by country, the rate-history chart, and a duty calculator. 👉
| Code | Description | General (MFN) | Special | Column 2 |
|---|---|---|---|---|
| 7304.11.00 👉 | Of stainless steel | Free | — | 35% |
| 7304.22.00 👉 | Drill pipe of stainless steel | Free | — | 35% |
| 7304.39.00 👉 | Other | Free | — | 25% |
| 7304.49.00 👉 | Other | Free | — | 36% |
"Special" shows the free-trade-agreement rate; open a code to see exactly which countries qualify.
Common questions
What products fall under HTS heading 7304?
Tubes, pipes and hollow profiles, seamless, of iron (other than cast 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.