HS code · 6-digit subheading
HS Code 7305.90 – Iron or steel (excluding cast iron); tubes and pipes n.e.c. in heading no. 7305, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)
HS code 7305.90 is the 6-digit subheading for iron or steel (excluding cast iron), tubes and pipes n.e.c. in heading no. 7305, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless). It is used for custom-fabricated large-diameter pipes, specialized industrial conduits, heavy-duty structural members, large-scale culverts and bespoke process piping.
What HS 7305.90 covers
This HS code serves as a residual category within heading 7305, covering large-diameter iron or steel tubes and pipes (external diameter > 406.4mm, not seamless) that are not specifically classified as longitudinally welded (730531) or other welded (730539), and are not line pipe or casing for oil/gas. This "not elsewhere specified" classification implies a diverse range of applications for heavy-duty, large-bore piping in various industrial and structural contexts. Countries with advanced manufacturing capabilities and significant infrastructure projects, such as China, Germany, Japan, and the USA, are prominent in the trade of these goods. Importers typically include large engineering firms, construction companies, and industrial manufacturers seeking specialized or custom large-diameter piping solutions. The key takeaway is that these pipes are large, welded (but not fitting the specific welding types of 730531/39), and not for oil/gas pipelines, making them versatile for general industrial and civil engineering uses.
- Covers
- Custom-fabricated large-diameter pipes
- Specialized industrial conduits
- Heavy-duty structural members
- Large-scale culverts
- Bespoke process piping
- Large-bore utility pipes
- Custom-welded steel cylinders
- Examples
- Custom-ordered large pipes from Nippon Steel
- specialized pipes from ArcelorMittal
- bespoke industrial pipes from Tenaris
- custom fabrication by local steelworks
- JFE Steel custom large pipes
Codes often confused with 7305.90
Common mistake. This code is a "basket" category for large-diameter pipes not fitting 730531 or 730539, so misclassification often occurs when the specific welding type is known but overlooked, or when the pipe is actually for oil/gas (e.g., 730511, 730519).
Top exporters and importers of HS code 730590, 2025
In 2025, the largest exporter of HS code 730590 in UN Comtrade data was Spain, with 20% of world exports; the largest importer in UN Comtrade data was Thailand, with 13% 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 Spain $26M 20% of world exports
- 2 China $20M 16% of world exports
- 3 Romania $12M 9.4% of world exports
World total: $130M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Thailand $16M 13% of world imports
- 2 Singapore $10M 8.4% of world imports
- 3 Sweden $10M 8.4% of world imports
World total: $122M 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 7305.90
Brazil does not split HS 7305.90: its NCM code is 7305.90.00.
All Brazil NCM codes in heading 73.05 →
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 7305.90
What is HS code 730590?
HS code 730590 is a 6-digit subheading in the Harmonized System that covers: Iron or steel (excluding cast iron); tubes and pipes n.e.c. in heading no. 7305, having circular cross-sections, external diameter exceeds 406.4mm, (not seamless). This HS code serves as a residual category within heading 7305, covering large-diameter iron or steel tubes and pipes (external diameter > 406.4mm, not seamless) that are not specifically classified as longitudinally welded (730531) or other welded (730539), and are not line pipe or casing for oil/gas. This "not elsewhere specified" classification implies a diverse range of applications for heavy-duty, large-bore piping in various industrial and structural contexts. Countries with advanced manufacturing capabilities and significant infrastructure projects, such as China, Germany, Japan, and the USA, are prominent in the trade of these goods. Importers typically include large engineering firms, construction companies, and industrial manufacturers seeking specialized or custom large-diameter piping solutions. The key takeaway is that these pipes are large, welded (but not fitting the specific welding types of 730531/39), and not for oil/gas pipelines, making them versatile for general industrial and civil engineering uses.
What products fall under HS code 730590?
Custom-fabricated large-diameter pipes, specialized industrial conduits, heavy-duty structural members, large-scale culverts, bespoke process piping, large-bore utility pipes, custom-welded steel cylinders
What are common misclassifications for HS code 730590?
This code is a "basket" category for large-diameter pipes not fitting 730531 or 730539, so misclassification often occurs when the specific welding type is known but overlooked, or when the pipe is actually for oil/gas (e.g., 730511, 730519).
Which countries are the top exporters of goods under HS code 730590?
In 2025, the top exporters of HS code 730590 in UN Comtrade data were Spain ($26M, 20% of world exports), China ($20M) and Romania ($12M). World exports came to about $130M, 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 730590?
In 2025, the top importers of HS code 730590 in UN Comtrade data were Thailand ($16M, 13% of world imports), Singapore ($10M) and Sweden ($10M). World imports came to about $122M, 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 730590 structured?
HS code 730590 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (05) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730590?
In Brazil, HS code 730590 is NCM 7305.90.00. The last two digits are 00 because Brazil does not split this HS code further.