U.S. imports of Iron & Non-Stainless Steel Pipe Flanges (HS 730791) totaled $38.2M in August 2026, imported from 44 countries.
Importers of Iron & Non-Stainless Steel Pipe Flanges paid $21.3M in duties in August 2026, an average duty rate of 55.42% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Iron & Non-Stainless Steel Pipe Flanges imports of $38.2M in August 2026 ran 23% above the year-to-date monthly average of $31.0M.
Last updated: August 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.
2.0K import shipments a month
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.
ImportsExports
Imports
$38.2MYoY · free account
Exports
$8.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $361.1M of Iron & Non-Stainless Steel Pipe Flanges and exported $97.3M.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
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Subheading 3 of 10 in heading 7307
Subheading 730791 · $38.2M of $280.0M
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7307915010 | Flanges, Irn/Naly Stl NESOI W Insd Diam Lsth 360mm | $18.5M | 55.09% | 99.90% | $10.2M |
| 7307915050 | Flanges, Irn/Naly Stl NESOI W Insd Diam 360mm Ormr | $8.7M | 56.67% | 100.00% | $4.9M |
| 7307911000 | Flanges, Irn/Nal Stl, Nt Machnd, Toold or Processd | $6.1M | 53.64% | 100.00% | $3.3M |
| 7307915030 | Flanges, Aly Stl Exc Stnls NESOI Ins Diam Lt 360mm | $3.4M | 54.50% | 97.71% | $1.9M |
| 7307913000 | Flanges, Aly Stl, Nt Stnls, Nt Machnd, Tld or Proc | $1.3M | 59.91% | 96.66% | $760K |
| 7307915070 | Flanges, Aly Stl Exc Stnls NESOI Ins Diam 360mm Om | $433K | 63.66% | 100.00% | $276K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7307914000 | Flanges of Alloy Steel not Stainless | $4.4M |
| 7307912000 | Flanges of Iron or Nonalloy Steel | $3.7M |
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.
Imports · August 2026
origin
India and China together supply 58% of it. China pays 77.0% duty; South Korea 51.4%.
customs district
destination
entry
rate provision · imports
0.4% enters free of duty; duty collected equals 55.42% of imports for consumption.