Loading...
HSChapter 73
U.S. imports of large-diameter line pipe, longitudinally submerged arc welded, over 406.4 mm (HS 730511) totaled $21.8M in April 2026, traded with 8 countries.
Importers of Large-Diameter Line Pipe, Longitudinally Submerged Arc Welded, Over 406.4 mm paid $5.8M in duties in April 2026 — an effective duty rate of 33% on $17.6M in dutiable value, based on actual customs collections rather than the published tariff schedule. Large-Diameter Line Pipe, Longitudinally Submerged Arc Welded, Over 406.4 mm imports of $21.8M in April 2026 ran 16% above the year-to-date monthly average of $18.8M.
Last updated: April 2026 dataLongitudinally submerged arc welded (LSAW) line pipe with external diameters exceeding 406.4 mm (16 inches) is engineered specifically for high-pressure oil and gas transmission pipelines, where weld integrity and dimensional consistency over long runs are critical to pipeline safety standards. Germany and Greece are notable European sources under this heading, with South Korea also a significant supplier. The US schedule distinguishes nonalloy steel pipe by diameter bracket — 406.4–609.6 mm (7305111030) and over 609.6 mm (7305111060) — from alloy steel LSAW pipe (7305115000). These products are subject to Section 232 tariffs, and importers should verify compliance with API 5L or equivalent pipeline specifications as part of entry documentation.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Most large-diameter LSAW line pipe for oil and gas service must meet API Specification 5L, which covers chemical composition, mechanical properties, weld quality, and hydrostatic testing. Buyers and importers should require mill test reports and API monogram documentation from the foreign producer. Some pipeline operators also impose supplementary requirements (SR) beyond the base API 5L standard, which must be agreed upon in the purchase order and verified before shipment.
Heading 730511 is specifically limited to longitudinally submerged arc welded pipe — meaning the weld seam runs parallel to the pipe axis and is made by the SAW process. Spiral (helical) welded pipe, where the seam runs at an angle to the axis, classifies under heading 730520. Other longitudinally welded methods (e.g., high-frequency induction welding) fall under heading 730512. The welding process and seam orientation must be confirmed with the mill to ensure correct classification.
Supplier Network
Get discovered by U.S. importers searching for HS 730511 — Large-Diameter Line Pipe, Longitudinally Submerged Arc Welded, Over 406.4 mm. Be the first supplier listed.
Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| TURKEY | $12.5M | -- | -$12.5M |
| KOREA, SOUTH | $6.3M | -- | -$6.3M |
| JAPAN | $1.9M | -- | -$1.9M |
| GERMANY | $1.1M | -- | -$1.1M |
| TRINIDAD AND TOBAGO | -- | $261K | +$261K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7305111060 | LNPIPE IRON/STL LONGT SBMRG ARC WELD,DIAM GT 609.6 | $20.6M | 34.56% | $5.7M |
| 7305111030 | OIL LNEPIPE IRON/STL LONGITUDNLY SUBMRGED ARC WELD | $1.2M | 6.49% | $67K |
| 7305115000 | LNPIP ALLOY/STL LONGTD SBMERGE ARC WELD,GT 406.4MM | $56K | 30.95% | $45K |
LNPIPE IRON/STL LONGT SBMRG ARC WELD,DIAM GT 609.6
OIL LNEPIPE IRON/STL LONGITUDNLY SUBMRGED ARC WELD
LNPIP ALLOY/STL LONGTD SBMERGE ARC WELD,GT 406.4MM
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7305115000 | LNPIP ALLOY/STL LONGTD SBMERGE ARC WELD,GT 406.4MM | $309K |
| 7305111000 | LN PP IOS NA LNGTD SBM ARC WLD DIAM 0406.4MM CIRC | $294K |
LNPIP ALLOY/STL LONGTD SBMERGE ARC WELD,GT 406.4MM
117.4K kg
LN PP IOS NA LNGTD SBM ARC WLD DIAM 0406.4MM CIRC
118.4K kg
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
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $15.0M | $505K | -$14.5M |
| LAKE CHARLES, LA | $5.1M | -- | -$5.1M |
| NEW ORLEANS, LA | $1.7M | $50K | -$1.7M |