HTS heading 7306 · Chapter 73
HTS 7306: Other tubes, pipes and hollow profiles, of iron or steel
HTS heading 7306 covers other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel. It has 30 tariff lines with a duty rate; the general (MFN) rates are Free (30 lines).
Imports may also owe Chapter 99 tariffs (Section 232, 301 or 201) depending on origin and date, plus the Merchandise Processing Fee and, by sea, the Harbor Maintenance Fee.
Rates from the 2026 HTS Revision 22, effective October 30, 2026. Source: U.S. International Trade Commission.
Tariff lines and duty rates
| HTS code | Description | General | Special | Column 2 | Estimate |
|---|---|---|---|---|---|
| Line pipe of a kind used for oil or gas pipelines: | |||||
| 7306.11.00 | Welded, of stainless steel | Free | 10% | ||
| 7306.11.00.10 | With an outside diameter not exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.11.00.50 | With an outside diameter exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.19 | Other: | ||||
| 7306.19.10 | Of iron or nonalloy steel | Free | 5.5% | ||
| 7306.19.10.10 | With an outside diameter not exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.19.10.50 | With an outside diameter exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.19.51 | Of alloy steel | Free | 10% | ||
| 7306.19.51.10 | With an outside diameter not exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.19.51.50 | With an outside diameter exceeding 114.3 mm[kg] | Estimate → | |||
| Casing and tubing of a kind used in drilling for oil or gas: | |||||
| 7306.21 | Welded of stainless steel: | ||||
| Casing: | |||||
| 7306.21.30.00 | Threaded or coupled[kg] | Free | 28% | Estimate → | |
| 7306.21.40.00 | Other[kg] | Free | 8.5% | Estimate → | |
| 7306.21.80 | Tubing | Free | 10% | ||
| 7306.21.80.10 | Imported with coupling[kg] | Estimate → | |||
| 7306.21.80.50 | Other[kg] | Estimate → | |||
| 7306.29 | Other: | ||||
| Casing: | |||||
| Of iron or nonalloy steel: | |||||
| 7306.29.10 | Threaded or coupled | Free | 20% | ||
| 7306.29.10.30 | Imported with coupling[kg] | Estimate → | |||
| 7306.29.10.90 | Other[kg] | Estimate → | |||
| 7306.29.20.00 | Other[kg] | Free | 1% | Estimate → | |
| Other: | |||||
| 7306.29.31.00 | Threaded or coupled[kg] | Free | 28% | Estimate → | |
| 7306.29.41.00 | Other[kg] | Free | 8.5% | Estimate → | |
| Tubing: | |||||
| 7306.29.60 | Of iron or nonalloy steel | Free | 5.5% | ||
| 7306.29.60.10 | Imported with coupling[kg] | Estimate → | |||
| 7306.29.60.50 | Other[kg] | Estimate → | |||
| 7306.29.81 | Other | Free | 10% | ||
| 7306.29.81.10 | Imported with coupling[kg] | Estimate → | |||
| 7306.29.81.50 | Other[kg] | Estimate → | |||
| 7306.30 | Other, welded, of circular cross section, of iron or nonalloy steel: | ||||
| 7306.30.10 | Having a wall thickness of less than 1.65 mm | Free | 25% | ||
| 7306.30.10.10 | Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit[kg] | Estimate → | |||
| 7306.30.10.90 | Other[kg] | Estimate → | |||
| Having a wall thickness of 1.65 mm or more: | |||||
| 7306.30.30.00 | Tapered steel pipes and tubes principally used as parts of illuminating articles[kg] | Free | 45% | Estimate → | |
| 7306.30.50 | Other | Free | 5.5% | ||
| 7306.30.50.10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold drawn[kg] | Estimate → | |||
| 7306.30.50.15 | Other, cold-drawn[kg] | Estimate → | |||
| 7306.30.50.20 | Other, cold-rolled (cold-reduced) with a wall thickness not exceeding 2.54 mm[kg] | Estimate → | |||
| Other: | |||||
| With an outside diameter not exceeding 114.3 mm: | |||||
| Galvanized: | |||||
| Imported with coupling: | |||||
| 7306.30.50.26 | With an outside diameter not exceeding 50.8 mm[kg] | Estimate → | |||
| 7306.30.50.27 | With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.30.50.28 | Internally coated or lined with a non-electrically insulating material, suitable for use as electrical conduit[kg] | Estimate → | |||
| Other: | |||||
| 7306.30.50.31 | With an outside diameter not exceeding 50.8 mm[kg] | Estimate → | |||
| 7306.30.50.33 | With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm[kg] | Estimate → | |||
| Other: | |||||
| 7306.30.50.35 | Tube and pipe hollows for redrawing[kg] | Estimate → | |||
| Imported with coupling: | |||||
| 7306.30.50.41 | With an outside diameter not exceeding 50.8 mm[kg] | Estimate → | |||
| 7306.30.50.43 | With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm[kg] | Estimate → | |||
| Other: | |||||
| 7306.30.50.56 | With an outside diameter not exceeding 50.8 mm[kg] | Estimate → | |||
| 7306.30.50.57 | With an outside diameter exceeding 50.8 mm but not exceeding 114.3 mm[kg] | Estimate → | |||
| With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm: | |||||
| 7306.30.50.85 | Galvanized[kg] | Estimate → | |||
| 7306.30.50.90 | Other[kg] | Estimate → | |||
| 7306.40 | Other, welded, of circular cross section, of stainless steel: | ||||
| 7306.40.10 | Having a wall thickness of less than 1.65 mm | Free | 36% | ||
| Containing more than 0.5 percent by weight of nickel: | |||||
| 7306.40.10.10 | Containing more than 1.5 percent but less than 5 percent by weight of molybdenum[kg] | Estimate → | |||
| 7306.40.10.15 | Other[kg] | Estimate → | |||
| 7306.40.10.90 | Other[kg] | Estimate → | |||
| 7306.40.50 | Having a wall thickness of 1.65 mm or more | Free | 11% | ||
| 7306.40.50.05 | Of high-nickel alloy steel[kg] | Estimate → | |||
| Other: | |||||
| 7306.40.50.15 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn[kg] | Estimate → | |||
| Other, cold-drawn or cold-rolled (cold- reduced): | |||||
| 7306.40.50.40 | Containing more than 0.5 percent but less than 24 percent by weight of nickel[kg] | Estimate → | |||
| Other: | |||||
| 7306.40.50.42 | Containing less than 15 percent by weight of chromium[kg] | Estimate → | |||
| 7306.40.50.44 | Other[kg] | Estimate → | |||
| Other: | |||||
| With an outside diameter not exceeding 114.3 mm: | |||||
| Containing more than 0.5 percent but less than 24 percent by weight of nickel: | |||||
| 7306.40.50.62 | Containing more than 1.5 percent but less than 5 percent by weight of molybdenum[kg] | Estimate → | |||
| 7306.40.50.64 | Other[kg] | Estimate → | |||
| 7306.40.50.80 | Other[kg] | Estimate → | |||
| With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm: | |||||
| 7306.40.50.85 | Containing more than 0.5 percent but less than 24 percent by weight of nickel[kg] | Estimate → | |||
| 7306.40.50.90 | Other[kg] | Estimate → | |||
| 7306.50 | Other, welded, of circular cross section, of other alloy steel: | ||||
| 7306.50.10.00 | Having a wall thickness of less than 1.65 mm[kg] | Free | 35% | Estimate → | |
| Having a wall thickness of 1.65 mm or more: | |||||
| 7306.50.30.00 | Tapered pipes and tubes of steel principally used as parts of illuminating articles[kg] | Free | 45% | Estimate → | |
| 7306.50.50 | Other | Free | 10% | ||
| 7306.50.50.10 | Suitable for use in boilers, superheaters, heat exchangers, condensers, refining furnaces and feedwater heaters, whether or not cold-drawn[kg] | Estimate → | |||
| 7306.50.50.30 | Other, cold-drawn or cold-rolled (cold- reduced)[kg] | Estimate → | |||
| Other: | |||||
| 7306.50.50.50 | With an outside diameter not exceeding 114.3 mm[kg] | Estimate → | |||
| 7306.50.50.70 | With an outside diameter exceeding 114.3 mm but not exceeding 406.4 mm[kg] | Estimate → | |||
| Other, welded, of noncircular cross section: | |||||
| 7306.61 | Of square or rectangular cross section: | ||||
| Having a wall thickness of 4 mm or more: | |||||
| 7306.61.10.00 | Of iron or nonalloy steel[kg] | Free | 1% | Estimate → | |
| 7306.61.30.00 | Of alloy steel[kg] | Free | 28% | Estimate → | |
| Having a wall thickness of less than 4 mm: | |||||
| 7306.61.50.00 | Of iron or nonalloy steel[kg] | Free | 25% | Estimate → | |
| 7306.61.70 | Of alloy steel | Free | 35% | ||
| 7306.61.70.30 | Of stainless steel[kg] | Estimate → | |||
| 7306.61.70.60 | Other[kg] | Estimate → | |||
| 7306.69 | Of other noncircular cross section: | ||||
| Having a wall thickness of 4 mm or more: | |||||
| 7306.69.10.00 | Of iron or nonalloy steel[kg] | Free | 1% | Estimate → | |
| 7306.69.30.00 | Of alloy steel[kg] | Free | 28% | Estimate → | |
| Having a wall thickness of less than 4 mm: | |||||
| 7306.69.50.00 | Of iron or nonalloy steel[kg] | Free | 25% | Estimate → | |
| 7306.69.70 | Of alloy steel | Free | 35% | ||
| 7306.69.70.30 | Of stainless steel[kg] | Estimate → | |||
| 7306.69.70.60 | Other[kg] | Estimate → | |||
| 7306.90 | Other: | ||||
| 7306.90.10.00 | Of iron or nonalloy steel[kg] | Free | 5.5% | Estimate → | |
| 7306.90.50.00 | Of alloy steel[kg] | Free | 10% | Estimate → |
82 lines shown. Statistical suffixes (the last two digits) inherit the rate of the 8-digit subheading above them.
Example: base duty and fees on $10000
For HTS 7306.11.00 at the general rate of Free, shipped by ocean, before any Chapter 99 tariffs:
| Base duty (Free) | $0.00 |
| Merchandise Processing Fee (0.3464%, min $34.58) | $34.64 |
| Harbor Maintenance Fee (0.125%) | $12.50 |
| Duty and fees | $47.14 |
Origin-specific tariffs can multiply this. Run this example from China or from Mexico to see every line.
Duty by country of origin
Frequently asked questions
What is the duty rate for HTS 7306?
Heading 7306 has 30 rate lines. The general (MFN) duty rates are Free (30 lines). Products of free trade agreement partners may enter at the special rate, and Column 2 rates apply to countries without normal trade relations. Chapter 99 tariffs can be added on top: calculate the full amount.
Do Section 301, 232 or 201 tariffs apply to HTS 7306?
It depends on the 8- or 10-digit subheading, the country of origin, the entry date and, for Section 232, the metal content. These additional duties are listed in Chapter 99 of the HTS. The free duty calculator checks each program for a given code, origin and date and shows which apply and why.
What fees are added to an import under HTS 7306?
Formal entries pay the Merchandise Processing Fee of 0.3464% of value (minimum $34.58, maximum $670.86 in FY2027). Ocean shipments also pay the Harbor Maintenance Fee of 0.125% of value. See the import duty calculator for how they combine.