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HSChapter 73
U.S. imports of large-diameter line pipe, longitudinally welded (other methods), over 406.4 mm (HS 730512) totaled $49.8M in July 2026, traded with 10 countries.
Importers of Large-Diameter Line Pipe, Longitudinally Welded (Other Methods), Over 406.4 mm paid $13.8M in duties in July 2026 — an effective duty rate of 28% on $49.8M in dutiable value, based on actual customs collections rather than the published tariff schedule. Large-Diameter Line Pipe, Longitudinally Welded (Other Methods), Over 406.4 mm imports of $49.8M in July 2026 ran 126% above the year-to-date monthly average of $22.0M.
Last updated: July 2026 dataLarge-diameter line pipe welded longitudinally by methods other than submerged arc welding — including high-frequency induction and electric resistance welding — covers the same 406.4 mm-and-over diameter range as heading 730511 but reflects different production technology and, often, different wall-thickness capabilities. South Korea and Germany are the leading suppliers, with Canada and Mexico also significant sources for North American pipeline projects. The US schedule mirrors 730511 in its diameter and alloy-type breakouts: nonalloy steel pipe in the 406.4–609.6 mm range (7305121030), over 609.6 mm (7305121060), and alloy steel (7305125000). Section 232 tariffs apply, and API 5L compliance documentation is standard for pipeline service entry.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
229 shipments/mo
Heading 730512 captures longitudinally welded large-diameter pipe made by any process other than submerged arc welding — most commonly high-frequency induction (HFI) welding and electric resistance welding (ERW). These processes are typically used for thinner-wall pipe in the lower end of the large-diameter range. Importers should obtain mill documentation specifying the welding process to distinguish 730511 (SAW) from 730512 (other longitudinal weld) entries.
North American sourcing from Canada and Mexico can reduce Section 232 exposure risk depending on current trade measures and applicable exclusions, and proximity shortens lead times for large, heavy pipe that is expensive to ship. However, domestic content requirements in certain federally funded infrastructure projects may impose additional Buy America or Buy American Act compliance obligations beyond standard customs requirements, which importers and project owners should evaluate separately from HTS classification.
Subheading 1 of 7 in heading 7305
Subheading 730512 · $49.8M of $86.7M
Supplier Network
Get discovered by U.S. importers searching for HS 730512 — Large-Diameter Line Pipe, Longitudinally Welded (Other Methods), Over 406.4 mm. Be the first supplier listed.
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 |
|---|---|---|---|---|---|
| 7305121030 | Lnpipe Iron/Stl Longtd Weld,406.4mm-609.6mm Diam | $49.6M | 27.61% | 100.00% | $13.7M |
| 7305121060 | Linepipe Iron/Stl Longitudnly Weld,Gt 609.6mm Diam | $109K | 50.00% | 100.00% | $55K |
| 7305125000 | Linepipe Alloy Stl Longitud Weld,Gt 406.4mm Diam | $30K | 50.00% | 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 |
|---|---|---|
| 7305125000 | Linepipe Alloy Stl Longitud Weld,Gt 406.4mm Diam | $42K |
| 7305121000 | Ln Pp Ios Na Oth Lngtd Wld Diam O 406.4mm Circ Cs | $35K |
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
$49.8MYoY · Pro
Exports
$77KYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Korea, South and Greece together supply 93% of it.
customs district
destination
entry
rate provision · imports
the effective duty rate is 27.67%.