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HSChapter 73
U.S. imports of tubes, pipes & hollow profiles of cast iron (HS 730300) totaled $2.4M in April 2026, traded with 25 countries.
Importers of Tubes, Pipes & Hollow Profiles of Cast Iron paid $186K in duties in April 2026 — an effective duty rate of 8.2% on $2.3M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataCast iron's graphite microstructure gives these pipes and hollow profiles superior corrosion resistance and vibration damping compared to steel alternatives, making them a longstanding choice for municipal water, sewer, and drainage infrastructure. The US tariff schedule subdivides the heading into soil pipe (7303000030), pressure pipe with inside diameter less than 356 mm (7303000060), and all other cast iron tubes and profiles (7303000090). Section 232 tariffs apply to cast iron pipe as a steel-adjacent iron product, and importers should verify whether ductile iron or gray iron grades affect both classification and compliance with AWWA or ASTM standards required by municipal procurement contracts.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Yes. Ductile iron (also called nodular or spheroidal graphite iron) is a form of cast iron and classifies under heading 7303 along with gray cast iron pipe. The distinction between ductile and gray iron matters for engineering specifications and AWWA standards but does not create a separate HTS heading.
The pressure pipe provision at 7303000060 covers cast iron pressure pipe with an inside diameter less than 356 mm. Pipe with an inside diameter of 356 mm or greater, as well as non-pressure applications not covered by the soil pipe line, would fall under the NESOI provision at 7303000090. Confirming the inside diameter measurement and the pipe's intended service (pressure vs. gravity/drainage) is essential for correct classification.
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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 |
|---|---|---|---|---|
| 7303000090 | TUBES, PIPES AND HOLLOW PROFILES, CAST IRON, NESOI | $2.1M | 9.13% | $184K |
| 7303000030 | SOIL PIPE OF CAST IRON | $151K | 0.47% | $714 |
| 7303000060 | PRESSURE PIPE, CAST IRON, INSDE DIAM LS THN 356 MM | $99K | 0.71% | $700 |
TUBES, PIPES AND HOLLOW PROFILES, CAST IRON, NESOI
SOIL PIPE OF CAST IRON
PRESSURE PIPE, CAST IRON, INSDE DIAM LS THN 356 MM
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7303000090 | TUBES, PIPES AND HOLLOW PROFILES, CAST IRON, NESOI | $2.0M |
| 7303000060 | PRESSURE PIPE, CAST IRON, INSDE DIAM LS THN 356 MM | $1.6M |
| 7303000030 | SOIL PIPE OF CAST IRON | $449K |
TUBES, PIPES AND HOLLOW PROFILES, CAST IRON, NESOI
646.0K kg
PRESSURE PIPE, CAST IRON, INSDE DIAM LS THN 356 MM
909.1K kg
SOIL PIPE OF CAST IRON
115.3K 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 |
|---|---|---|---|
| California | $228K | $960K | +$732K |
| Ohio | -- | $1.1M | +$1.1M |
| Georgia | $903K | $8K | -$896K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| BLAINE, WA | -- | $959K | +$959K |
| SAVANNAH, GA | $900K | -- | -$900K |
| ALEXANDRIA BAY, NY | -- | $877K | +$877K |