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HSChapter 73
U.S. imports of large-diameter longitudinally welded pipes & tubes, iron or steel (over 16 in.) (HS 730531) totaled $5.8M in July 2026, traded with 12 countries.
Importers of Large-Diameter Longitudinally Welded Pipes & Tubes, Iron or Steel (Over 16 In.) paid $1.9M in duties in July 2026 — an effective duty rate of 33% on $5.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Large-Diameter Longitudinally Welded Pipes & Tubes, Iron or Steel (Over 16 In.) imports of $5.8M in July 2026 ran 13% above the year-to-date monthly average of $5.2M.
Last updated: July 2026 dataLongitudinally welded pipes and tubes with an external diameter exceeding 406.4 mm serve critical infrastructure roles in water transmission, structural piling, and industrial process piping. Section 232 tariffs apply broadly to this steel product category, and importers must carefully distinguish longitudinal welding from other welding methods to ensure correct classification under this heading versus 730539. Germany and India are the leading suppliers to the US market, with South Korea, Mexico, and Taiwan also among the top sources. The heading's alloy-steel lines (7305316010 for stainless and 7305316090 for other alloy) carry distinct classification considerations from the non-alloy line 7305314000.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
123 shipments/mo
The key distinction is the welding method: 730531 covers pipes and tubes welded longitudinally (seam running parallel to the pipe axis), while 730539 captures all other welded configurations — such as spiral or helical welding. Misclassifying the weld type is a common error; consulting a licensed customs broker is advisable when the manufacturing method is not clearly documented.
Yes. Tariff line 7305312000 is specifically designated for tapered steel pipes and tubes that are longitudinally welded and intended for use as light poles. This end-use specificity means that tapered pipes destined for other applications would generally fall under a different line within the heading, making documentation of intended use important at entry.
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ImportsExports
Imports
$5.8MYoY · Pro
Exports
$7.0MYoY · 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 |
|---|---|---|---|---|---|
| 7305314000 | Tubes, Pipes NESOI, Longitudnly Welded Irn/Nal Stl | $4.2M | 30.52% | 100.00% | $1.3M |
| 7305316010 | Tubes/Pipes Ss LNG Weld Cir X-Sec Gt 406.4mm NESOI | $1.6M | 39.82% | 100.00% | $645K |
| 7305316090 | Tubes/Pipe Alloy LNG Wld Cir Xsec Gt 406.4mm NESOI | $54K | 3.16% | 6.33% | $2K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7305314000 | Tubes, Pipes NESOI, Longitudnly Welded Irn/Nal Stl | $6.7M |
| 7305316000 | Tubes, Pipes NESOI Longitud Welded of Alloy Steel | $223K |
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 India together supply 73% of it.
customs district
destination
entry
rate provision · imports
0.9% enters free of duty; the effective duty rate is 32.84%.