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HSChapter 73
U.S. imports of large-diameter line pipe, riveted or similarly closed (not longitudinally welded), over 406.4 mm (HS 730519) totaled $268K in July 2026, traded with 3 countries.
Importers of Large-Diameter Line Pipe, Riveted or Similarly Closed (Not Longitudinally Welded), Over 406.4 mm paid $139K in duties in July 2026 — an effective duty rate of 52% on $268K in dutiable value, based on actual customs collections rather than the published tariff schedule. Large-Diameter Line Pipe, Riveted or Similarly Closed (Not Longitudinally Welded), Over 406.4 mm imports of $268K in July 2026 ran 294% above the year-to-date monthly average of $68K.
Last updated: July 2026 dataRiveted, lock-seam, or otherwise mechanically closed large-diameter line pipe — a residual category for joining methods other than longitudinal or spiral welding — is a relatively low-volume heading used in specialized infrastructure and rehabilitation applications. Taiwan and Vietnam lead US import supply under this heading, an unusual sourcing pattern that reflects niche fabrication capacity rather than the integrated steel mill base that dominates other large-diameter pipe headings. The US schedule follows the same diameter and alloy-type structure as 730511 and 730512, with nonalloy steel lines split by diameter bracket and a separate alloy steel line (7305195000). Section 232 tariffs apply, and importers should confirm that the joining method is accurately described in mill documentation to avoid misclassification into the more common welded-pipe headings.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
8 shipments/mo
Beyond traditional riveted seams — now rare in new production — this heading captures large-diameter pipe joined by lock-seam, crimped, or other mechanical closure methods that do not involve fusion welding. In practice, most entries under 730519 involve specialty or legacy pipe products. Importers should obtain detailed fabrication records from the manufacturer; if the pipe has any weld seam, it likely classifies under 730511, 730512, or 730520 instead.
Trade remedy orders on large-diameter welded pipe from China have historically been defined by product scope that can extend to mechanically closed pipe if the product is found to be within the order's scope. Importers sourcing from China under 730519 should conduct a scope analysis with a trade attorney or customs broker, as CBP may refer entries to the Department of Commerce for a scope ruling if the product's construction method is ambiguous.
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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 |
|---|---|---|---|---|---|
| 7305191060 | Oil Linepipe Iron/Stl, Extnl Diam Gt 609.6mm,NESOI | $247K | 50.00% | 100.00% | $124K |
| 7305191030 | Linepipe Iron/Stl,406.4mm-609.6mm Diameter,NESOI | $21K | 75.00% | 100.00% | $15K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7305195000 | Oil Linepipe Alloy Stl,Extnl Diam Gt 406.4mm,NESOI | $318K |
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
$268KYoY · Pro
Exports
$318KYoY · Pro
12-mo low · imports
YoY · ProFewer than 6 of the last 12 months reported trade above $500K; the trend chart is not shown for thin series.
Through July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Mexico and China together supply 100% of it.
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destination
entry
rate provision · imports
the effective duty rate is 51.92%.