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U.S. imports of iron & non-stainless steel pipe flanges (HS 730791) totaled $31.1M in July 2026, traded with 41 countries.
Importers of Iron & Non-Stainless Steel Pipe Flanges paid $17.2M in duties in July 2026 — an effective duty rate of 55% on $31.5M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataFlanges of iron, nonalloy steel, and non-stainless alloy steel are widely used in oil-and-gas, petrochemical, and industrial piping systems to join pipe sections and connect equipment. The US tariff schedule subdivides this heading by alloy composition and machining/processing status, with inside-diameter thresholds at 360 mm creating additional classification breakpoints across eight 10-digit lines. India leads US supply under this heading, followed by China and South Korea, making these imports broadly subject to Section 232 steel tariffs as well as potential Section 301 exposure on Chinese-origin goods. Importers should confirm whether flanges arrive in a machined, tooled, or processed state, as that distinction directly determines the applicable HTS line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.6K shipments/mo
The US schedule splits non-stainless flanges into lines covering inside diameters less than 360 mm and those 360 mm or greater. Importers must measure the bore accurately before filing entry, because misclassification between these size brackets can trigger different duty rates and antidumping exposure.
India is the leading supplier of flanges under this heading. While Indian steel articles are generally subject to Section 232 tariffs, importers should also check whether any antidumping or countervailing duty orders specifically cover the flange type and alloy grade being imported, as coverage varies by product specification.
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Subheading 3 of 10 in heading 7307
Subheading 730791 · $31.1M of $255.2M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7307915010 | Flanges, Irn/Naly Stl NESOI W Insd Diam Lsth 360mm | $16.7M | 56.24% | 99.93% | $9.4M |
| 7307915050 | Flanges, Irn/Naly Stl NESOI W Insd Diam 360mm Ormr | $8.5M | 55.39% | 98.19% | $4.7M |
| 7307911000 | Flanges, Irn/Nal Stl, Nt Machnd, Toold or Processd | $3.6M | 53.56% | 100.76% | $1.9M |
| 7307915030 | Flanges, Aly Stl Exc Stnls NESOI Ins Diam Lt 360mm | $2.4M | 57.41% | 96.84% | $1.4M |
| 7307913000 | Flanges, Aly Stl, Nt Stnls, Nt Machnd, Tld or Proc | $1.3M | 54.88% | 99.77% | $693K |
| 7307915070 | Flanges, Aly Stl Exc Stnls NESOI Ins Diam 360mm Om | $773K | 56.71% | 100.02% | $439K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7307912000 | Flanges of Iron or Nonalloy Steel | $3.4M |
| 7307914000 | Flanges of Alloy Steel not Stainless | $3.0M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
ImportsExports
Imports
$31.1MYoY · Pro
Exports
$9.4MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
India and China together supply 55% of it.
customs district
destination
entry
rate provision · imports
0.0900% enters free of duty; the effective duty rate is 55.29%.