Product classification
HS code for Carbon steel pipe: 7306.30
Iron or non-alloy steel (excluding cast iron), tubes and pipes (not seamless), welded, of circular cross-section, n.e.c. in chapter 73.
Classification of carbon steel pipe under HS 7306.30
Carbon steel pipe of the welded variety is classified under HS code 7306.30. This classification is based on the manufacturing method, the cross-sectional shape, and the material composition. Heading 7306 covers tubes, pipes, and hollow profiles of iron or steel that are welded, riveted, or similarly closed, distinguishing them from the seamless pipes found in heading 7304. For a product to fall under 7306.30, it must be made of iron or non-alloy steel and have a circular cross-section. Furthermore, this code is generally applicable to pipes with an external diameter not exceeding 406.4 mm; pipes larger than this are typically classified under heading 7305. The term "non-alloy steel" refers to steel where the weight of any element does not exceed the limits specified in Note 1(f) to Chapter 72. These pipes are often produced via Electric Resistance Welding (ERW) or Longitudinal Submerged Arc Welding (LSAW). They are used in a wide range of applications, including water distribution, structural support, and low-pressure industrial fluid transport.
- Covers
- ERW (Electric Resistance Welded) carbon steel pipes
- Black steel pipe for plumbing and gas
- Galvanized welded steel pipes (circular)
- Schedule 40 and Schedule 80 welded carbon steel pipes
- Structural carbon steel tubing (circular)
- Also under 7306.30
- Tenaris welded pipes
- ArcelorMittal structural tubes
- Vallourec line pipes
- JFE Steel pipes
Codes often confused with 7306.30
Common mistake. The most common misclassification is placing welded pipe under 7304.31 or 7304.39, which are reserved for seamless pipes. Seamless pipes are manufactured through extrusion or piercing and have no longitudinal weld seam. Another error is using 7306.61 for square or rectangular tubing; 7306.30 is strictly for circular cross-sections. Additionally, if the pipe is made of stainless steel, it must be classified under 7306.40. Finally, large-diameter welded pipes (over 406.4 mm) must be moved to heading 7305.
Top exporters and importers of HS 730630 (the code used for carbon steel pipe), 2025
In 2025, the largest exporter of HS 730630 (the code used for carbon steel pipe) in UN Comtrade data was China, with 17% of world exports; the largest importer in UN Comtrade data was the United States, with 13% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 730630, not only carbon steel pipe.
Top exporters 2025 · share of world exports
- 1 China $1.3B 17% of world exports
- 2 Italy $1.2B 15% of world exports
- 3 Türkiye $561M 7.2% of world exports
World total: $7.8B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $969M 13% of world imports
- 2 Germany $646M 8.8% of world imports
- 3 Canada $401M 5.5% of world imports
World total: $7.4B 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 codes for carbon steel pipe
Brazil splits HS 7306.30 into 2 NCM codes. Pick the one that matches your product:
- 7306.30.10Welded tube, OD 22.25, wall 2.64, length 448.2 mm
- 7306.30.90Other welded round iron or non-alloy steel tubes
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
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 carbon steel pipe
What is the HS code for Carbon steel pipe?
The HS code for Carbon steel pipe is 730630 (Iron or non-alloy steel (excluding cast iron); tubes and pipes (not seamless), welded, of circular cross-section, n.e.c. in chapter 73). The HS code for welded, circular pipes made of iron or non-alloy steel is 7306.30.
How do I classify Carbon steel pipe for customs?
Carbon steel pipe is classified under HS code 730630 — Iron or non-alloy steel (excluding cast iron); tubes and pipes (not seamless), welded, of circular cross-section, n.e.c. in chapter 73. This is a 6-digit subheading level code.
Does this code include seamless carbon steel pipe?
No, seamless carbon steel pipes are classified under heading 7304, specifically 7304.31 for cold-drawn or 7304.39 for other types.
Which countries are the top exporters of carbon steel pipe (HS 730630)?
In 2025, the top exporters of HS 730630 (the code used for carbon steel pipe) in UN Comtrade data were China ($1.3B, 17% of world exports), Italy ($1.2B) and Türkiye ($561M). World exports came to about $7.8B, 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.
Which countries are the top importers of carbon steel pipe (HS 730630)?
In 2025, the top importers of HS 730630 (the code used for carbon steel pipe) in UN Comtrade data were the United States ($969M, 13% of world imports), Germany ($646M) and Canada ($401M). World imports came to about $7.4B, 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.
Is the HS code for Carbon steel pipe the same in all countries?
The base HS code 730630 for Carbon steel pipe is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for carbon steel pipe in Brazil?
Brazil splits HS 730630 into 2 NCM codes, so the right one for carbon steel pipe depends on the product's details: 7306.30.10 (Welded tube, OD 22.25, wall 2.64, length 448.2 mm), 7306.30.90 (Other welded round iron or non-alloy steel tubes).