HS code · 6-digit subheading
HS Code 7305.39 – Iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), welded (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm, (not seamless)
HS code 7305.39 is the 6-digit subheading for iron or steel (excluding cast iron), tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), welded (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm, (not seamless). It is used for spiral welded water mains, large-diameter structural piles, industrial exhaust ducts, hydroelectric penstocks and sewage force mains.
What HS 7305.39 covers
This category covers large-diameter, non-longitudinally welded iron or steel tubes and pipes, specifically those with an external diameter exceeding 406.4mm, excluding seamless types and those designated for oil or gas pipelines. The "non-longitudinally welded" aspect implies other welding methods like spiral welding, which is common for very large diameters. These pipes are essential for massive infrastructure projects, water distribution networks, industrial processing plants, and structural applications where robust, large-bore conduits are needed. Major importers and exporters include countries with significant industrial bases and ongoing large-scale construction, such as China, India, the United States, and European nations. The trade is driven by demand for heavy-duty piping in sectors like civil engineering, mining, and manufacturing. Key things to know include the specific welding technique, as it impacts manufacturing cost and performance, and the exclusion from oil/gas pipeline applications, which are classified elsewhere. These pipes are valued for their capacity to handle large volumes and withstand considerable pressure.
- Covers
- Spiral welded water mains
- Large-diameter structural piles
- Industrial exhaust ducts
- Hydroelectric penstocks
- Sewage force mains
- Mining slurry pipelines
- Large-scale ventilation tubing
- Examples
- Erw Steel spiral welded pipes
- JFE Steel large-diameter pipes
- Tenaris industrial welded pipes
- Baosteel spiral pipes
- EVRAZ large-diameter pipes
Codes often confused with 7305.39
Common mistake. This code can be confused with 730519 (other welded line pipe for oil/gas) due to similar dimensions, but the critical difference is the exclusion of oil/gas pipeline use. It's also distinct from 730531 by the welding method (not longitudinally welded).
Top exporters and importers of HS code 730539, 2025
In 2025, the largest exporter of HS code 730539 in UN Comtrade data was Türkiye, with 38% of world exports; the largest importer in UN Comtrade data was Morocco, with 19% 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 Türkiye $412M 38% of world exports
- 2 China $255M 23% of world exports
- 3 Spain $90M 8.2% of world exports
World total: $1.1B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Morocco $188M 19% of world imports
- 2 Germany $139M 14% of world imports
- 3 Saudi Arabia $100M 9.9% of world imports
World total: $1.0B 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 7305.39
Brazil does not split HS 7305.39: its NCM code is 7305.39.00.
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 7305.39
What is HS code 730539?
HS code 730539 is a 6-digit subheading in the Harmonized System that covers: Iron or steel (excluding cast iron); tubes and pipes (other than line pipe or casing of a kind used for oil or gas pipelines), welded (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm, (not seamless). This category covers large-diameter, non-longitudinally welded iron or steel tubes and pipes, specifically those with an external diameter exceeding 406.4mm, excluding seamless types and those designated for oil or gas pipelines. The "non-longitudinally welded" aspect implies other welding methods like spiral welding, which is common for very large diameters. These pipes are essential for massive infrastructure projects, water distribution networks, industrial processing plants, and structural applications where robust, large-bore conduits are needed. Major importers and exporters include countries with significant industrial bases and ongoing large-scale construction, such as China, India, the United States, and European nations. The trade is driven by demand for heavy-duty piping in sectors like civil engineering, mining, and manufacturing. Key things to know include the specific welding technique, as it impacts manufacturing cost and performance, and the exclusion from oil/gas pipeline applications, which are classified elsewhere. These pipes are valued for their capacity to handle large volumes and withstand considerable pressure.
What products fall under HS code 730539?
Spiral welded water mains, large-diameter structural piles, industrial exhaust ducts, hydroelectric penstocks, sewage force mains, mining slurry pipelines, large-scale ventilation tubing
What are common misclassifications for HS code 730539?
This code can be confused with 730519 (other welded line pipe for oil/gas) due to similar dimensions, but the critical difference is the exclusion of oil/gas pipeline use. It's also distinct from 730531 by the welding method (not longitudinally welded).
Which countries are the top exporters of goods under HS code 730539?
In 2025, the top exporters of HS code 730539 in UN Comtrade data were Türkiye ($412M, 38% of world exports), China ($255M) and Spain ($90M). World exports came to about $1.1B, 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 730539?
In 2025, the top importers of HS code 730539 in UN Comtrade data were Morocco ($188M, 19% of world imports), Germany ($139M) and Saudi Arabia ($100M). World imports came to about $1.0B, 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 730539 structured?
HS code 730539 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 (39) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730539?
In Brazil, HS code 730539 is NCM 7305.39.00. The last two digits are 00 because Brazil does not split this HS code further.