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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 $9.0M in April 2026, traded with 12 countries.
Importers of Large-Diameter Longitudinally Welded Pipes & Tubes, Iron or Steel (Over 16 In.) paid $3.1M in duties in April 2026 — an effective duty rate of 39% on $7.9M 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 $9.0M in April 2026 ran 70% above the year-to-date monthly average of $5.3M.
Last updated: April 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.
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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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| KOREA, SOUTH | $4.5M | -- | -$4.5M |
| CANADA | $460K | $2.4M | +$1.9M |
| INDIA | $1.5M | -- | -$1.5M |
| GERMANY | $1.3M | -- | -$1.3M |
| MEXICO | $538K | $85K | -$453K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7305314000 | TUBES, PIPES NESOI, LONGITUDNLY WELDED IRN/NAL STL | $5.3M | 33.27% | $1.4M |
| 7305316010 | TUBES/PIPES SS LNG WELD CIR X-SEC GT 406.4MM NESOI | $3.4M | 46.38% | $1.6M |
| 7305316090 | TUBES/PIPE ALLOY LNG WLD CIR XSEC GT 406.4MM NESOI | $199K | 25.00% | $50K |
TUBES, PIPES NESOI, LONGITUDNLY WELDED IRN/NAL STL
TUBES/PIPES SS LNG WELD CIR X-SEC GT 406.4MM NESOI
TUBES/PIPE ALLOY LNG WLD CIR XSEC GT 406.4MM NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7305314000 | TUBES, PIPES NESOI, LONGITUDNLY WELDED IRN/NAL STL | $2.2M |
| 7305316000 | TUBES, PIPES NESOI LONGITUD WELDED OF ALLOY STEEL | $307K |
| 7305312000 | TAPERED STL PIPES, TUBES LONG WLD FOR LIGHT POLES | $16K |
TUBES, PIPES NESOI, LONGITUDNLY WELDED IRN/NAL STL
530.8K kg
TUBES, PIPES NESOI LONGITUD WELDED OF ALLOY STEEL
34.3K kg
TAPERED STL PIPES, TUBES LONG WLD FOR LIGHT POLES
6.9K 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
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $7.6M | $449K | -$7.2M |
| Oregon | -- | $1.3M | +$1.3M |
| Washington | $538K | $41K | -$497K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| HOUSTON, TX | $7.2M | -- | -$7.2M |
| BLAINE, WA | -- | $1.0M | +$1.0M |
| PORTAL, ND | $428K | $39K | -$389K |