HS code · 6-digit subheading
HS Code 7303.00 – Cast iron; tubes, pipes and hollow profiles
HS code 7303.00 is the 6-digit subheading for cast iron, tubes, pipes and hollow profiles. It is used for ductile iron pipes, grey cast iron pipes, cast iron drainage pipes, cast iron soil pipes and cast iron fittings.
What HS 7303.00 covers
This HS code covers tubes, pipes, and hollow profiles made from cast iron, a material known for its strength, durability, and corrosion resistance, particularly in underground applications. These products are widely used in various sectors, including water and sewage systems, drainage, and certain industrial applications where robust, long-lasting conduits are required. International trade in cast iron pipes and profiles is driven by urban development, infrastructure upgrades, and industrial projects globally. Major importers often include municipalities and construction companies in countries with aging infrastructure or those undergoing rapid urbanization. Exporters are typically nations with established foundries and heavy industries capable of producing large volumes of these heavy-duty components. Key factors influencing trade include material specifications (e.g., ductile iron vs. grey cast iron), pressure ratings, coating requirements, and compliance with national and international plumbing and construction standards.
- Covers
- Ductile iron pipes
- Grey cast iron pipes
- Cast iron drainage pipes
- Cast iron soil pipes
- Cast iron fittings
- Cast iron hollow profiles
- Examples
- Saint-Gobain PAM ductile iron pipes
- McWane cast iron soil pipes
- US Pipe ductile iron pipes
- Kubota cast iron pipes
- American Cast Iron Pipe Company products
Codes often confused with 7303.00
Common mistake. This code is specifically for cast iron products; confusion can arise with 7304 (seamless iron/steel tubes) or 7305 (other iron/steel tubes) if the manufacturing process or material composition is not accurately identified.
Top exporters and importers of HS code 730300, 2025
In 2025, the largest exporter of HS code 730300 in UN Comtrade data was China, with 25% of world exports; the largest importer in UN Comtrade data was Italy, with 6.5% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 China $394M 25% of world exports
- 2 France $273M 17% of world exports
- 3 India $187M 12% of world exports
World total: $1.6B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Italy $116M 6.5% of world imports
- 2 Kuwait $99M 5.5% of world imports
- 3 France $91M 5.1% of world imports
World total: $1.8B Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for 7303.00
Brazil does not split HS 7303.00: its NCM code is 7303.00.00.
All Brazil NCM codes in heading 73.03 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about HS 7303.00
What is HS code 730300?
HS code 730300 is a 6-digit subheading in the Harmonized System that covers: Cast iron; tubes, pipes and hollow profiles. This HS code covers tubes, pipes, and hollow profiles made from cast iron, a material known for its strength, durability, and corrosion resistance, particularly in underground applications. These products are widely used in various sectors, including water and sewage systems, drainage, and certain industrial applications where robust, long-lasting conduits are required. International trade in cast iron pipes and profiles is driven by urban development, infrastructure upgrades, and industrial projects globally. Major importers often include municipalities and construction companies in countries with aging infrastructure or those undergoing rapid urbanization. Exporters are typically nations with established foundries and heavy industries capable of producing large volumes of these heavy-duty components. Key factors influencing trade include material specifications (e.g., ductile iron vs. grey cast iron), pressure ratings, coating requirements, and compliance with national and international plumbing and construction standards.
What products fall under HS code 730300?
Ductile iron pipes, grey cast iron pipes, cast iron drainage pipes, cast iron soil pipes, cast iron fittings, cast iron hollow profiles
What are common misclassifications for HS code 730300?
This code is specifically for cast iron products; confusion can arise with 7304 (seamless iron/steel tubes) or 7305 (other iron/steel tubes) if the manufacturing process or material composition is not accurately identified.
Which countries are the top exporters of goods under HS code 730300?
In 2025, the top exporters of HS code 730300 in UN Comtrade data were China ($394M, 25% of world exports), France ($273M) and India ($187M). World exports came to about $1.6B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of goods under HS code 730300?
In 2025, the top importers of HS code 730300 in UN Comtrade data were Italy ($116M, 6.5% of world imports), Kuwait ($99M) and France ($91M). World imports came to about $1.8B, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
How is HS code 730300 structured?
HS code 730300 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (03) identify the heading, and digits 5-6 (00) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730300?
In Brazil, HS code 730300 is NCM 7303.00.00. The last two digits are 00 because Brazil does not split this HS code further.