U.S. exports of Tubes, Pipes & Hollow Profiles of Cast Iron (HS 730300) totaled $3.6M in August 2026.
Importers of Tubes, Pipes & Hollow Profiles of Cast Iron paid $284K in duties in August 2026, an average duty rate of 9.57% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
114 import shipments a month
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.
ImportsExports
Imports
$3.0MYoY · free account
Exports
$3.6MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $31.5M of Tubes, Pipes & Hollow Profiles of Cast Iron and exported $41.4M.
Through August 2026. Source: U.S. Census Bureau.
Exports · August 2026
destination
Canada and Mexico together take 94% of it.
customs district
origin
entry
rate provision · imports
2.0% enters free of duty; duty collected equals 9.57% of imports for consumption.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 7303000090 | Tubes, Pipes and Hollow Profiles, Cast Iron, NESOI | $2.7M | 10.34% | 97.81% | $276K |
| 7303000030 | Soil Pipe of Cast Iron | $183K | 0.00% | 100.00% | -- |
| 7303000060 | Pressure Pipe, Cast Iron, Insde Diam Ls Thn 356 Mm | $122K | 7.01% | 100.00% | $9K |
HS10 export codes under this HS6 parent, each with its own page. 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 | $1.4M |
| 7303000030 | Soil Pipe of Cast Iron | $180K |
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.
Subheading 1 of 1 in heading 7303
Subheading 730300 · $3.6M of $3.6M
Trade Directory
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