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U.S. imports of iron & non-stainless steel butt welding fittings (HS 730793) totaled $26.7M in July 2026, traded with 30 countries.
Importers of Iron & Non-Stainless Steel Butt Welding Fittings paid $15.2M in duties in July 2026 — an effective duty rate of 32% on $46.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataButt welding fittings — including elbows, reducers, tees, and caps — are permanently welded into high-pressure piping systems used in oil-and-gas, power generation, and chemical processing, making material certification and dimensional standards critical at entry. Italy and South Korea lead US imports under this heading, with Malaysia, Canada, and Vietnam also significant sources. The eight 10-digit lines segment by alloy type (iron/nonalloy vs. non-stainless alloy steel), machining status, and inside-diameter threshold (below or at/above 360 mm). Section 232 tariffs apply broadly, and importers should verify whether specific antidumping or countervailing duty orders cover the alloy grade and origin combination being imported.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
1.2K shipments/mo
The US schedule separates fittings that have not been machined, tooled, or otherwise processed from those that have. An unprocessed forged blank and a finished machined fitting of the same alloy and diameter can fall under different 10-digit lines, so importers must confirm the manufacturing stage at the time of export.
End-users in pressure-service applications generally require mill test reports (MTRs) certifying compliance with ASTM A234 or equivalent standards, along with heat and lot traceability. Customs brokers may also need a manufacturer's affidavit confirming country of origin, particularly where circumvention of antidumping orders is a concern.
HSChapter 73
Subheading 6 of 10 in heading 7307
Subheading 730793 · $26.7M of $267.9M
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ImportsExports
Imports
$26.7MYoY · Pro
Exports
$3.7MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
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 |
|---|---|---|---|---|---|
| 7307939040 | Butt Weld Fit, Ins Diam>=360mm, Irn/Nnalloy, NESOI | $14.4M | 56.38% | 204.60% | $8.1M |
| 7307933040 | Butt Weld Fit, Ins Diam < 360mm,Irn/Nnalloy, NESOI | $8.2M | 58.88% | 159.90% | $4.8M |
| 7307936000 | Butt Welding Fittings Aly Stl Ex Stnls Dim Lt 360m | $2.1M | 55.42% | 98.88% | $1.2M |
| 7307939060 | Butt Welding Fittings Aly Stl Ex Stnl Dia 360mm Om | $1.4M | 53.73% | 111.40% | $744K |
| 7307939010 | Butt Weld Fit,in Dia>=360mm,Ir/Nal,Nt Mach/Tld/Prc | $462K | 54.30% | 100.00% | $251K |
| 7307933010 | Butt Weld Fit,in Dia<360mm,Ir/Naly,Nt Mach/Tld/Prc | $232K | 55.38% | 100.00% | $128K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7307931000 | Butt Welding Fittings of Iron or Nonalloy Steel | $2.0M |
| 7307932000 | Butt Welding Fittings of Alloy Steel not Stainless | $1.6M |
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 · July 2026
origin
Korea, South and Italy together supply 61% of it.
customs district
destination
entry
rate provision · imports
0.0900% enters free of duty; the effective duty rate is 56.89%.