Loading...
HSChapter 73
U.S. imports of large-diameter line pipe, longitudinally welded (other methods), over 406.4 mm (HS 730512) totaled $19.6M in April 2026, traded with 8 countries.
Importers of Large-Diameter Line Pipe, Longitudinally Welded (Other Methods), Over 406.4 mm paid $9.4M in duties in April 2026 — an effective duty rate of 48% on $19.8M 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 $19.6M in April 2026 ran 81% above the year-to-date monthly average of $10.8M.
Last updated: April 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.
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.
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.
| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $9.0M | -- | -$9.0M |
| GREECE | $6.7M | -- | -$6.7M |
| MEXICO | $2.1M | -- | -$2.1M |
| UNITED KINGDOM | $1.9M | -- | -$1.9M |
| CANADA | -- | $3K | +$3K |
Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7305121030 | LNPIPE IRON/STL LONGTD WELD,406.4MM-609.6MM DIAM | $19.6M | 47.65% | $9.4M |
| 7305125000 | LINEPIPE ALLOY STL LONGITUD WELD,GT 406.4MM DIAM | $0 | -- | -- |
LNPIPE IRON/STL LONGTD WELD,406.4MM-609.6MM DIAM
LINEPIPE ALLOY STL LONGITUD WELD,GT 406.4MM DIAM
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7305125000 | LINEPIPE ALLOY STL LONGITUD WELD,GT 406.4MM DIAM | $3K |
| 7305121000 | LN PP IOS NA OTH LNGTD WLD DIAM O 406.4MM CIRC CS | $0 |
LINEPIPE ALLOY STL LONGITUD WELD,GT 406.4MM DIAM
994 kg
LN PP IOS NA OTH LNGTD WLD DIAM O 406.4MM CIRC CS
ARTICLES OF IRON OR STEEL NESOI
HS 732690
STRUCTURES AND PARTS NESOI OF IRON OR STEEL
HS 730890
THREADED SCREWS AND BOLTS NESOI OF IRON OR STEEL
HS 731815
COOKING APPLIANCES ETC FOR GAS FUEL, IRON OR STEEL
HS 732111
NUTS OF IRON OR STEEL
HS 731816
TABLE, KITCHEN ETC ARTICLES & PTS, STAINLESS STEEL
HS 732393
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $19.6M | -- | -$19.6M |
| Washington | $11K | -- | -$11K |
| Unidentified | -- | $3K | +$3K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $17.5M | -- | -$17.5M |
| LAREDO, TX | $1.5M | -- | -$1.5M |
| BROWNSVILLE, TX | $623K | -- | -$623K |