Product classification
HS code for Steel tubing: 7306.29
Iron or steel (excluding cast iron), casing and tubing of a kind used in drilling for oil and gas (other than stainless steel or seamless), n.e.c. in chapter 73.
Classification of steel tubing under HS 7306.29
Steel tubing used specifically for oil and gas drilling is classified under HS code 7306.29. This code applies to other tubes and pipes (typically welded or otherwise joined) that are not made of stainless steel and are not seamless. The classification is functional, targeting the casing and tubing used in the extraction of hydrocarbons. Heading 7306 covers tubes, pipes, and hollow profiles with a circular cross-section and an external diameter not exceeding 406.4 mm, or those with non-circular cross-sections. The distinction between 7306.29 and other subheadings is based on the intended use in the petroleum industry and the specific manufacturing method. Because these are not seamless, they are excluded from heading 7304. Furthermore, because they are not made of stainless steel, they are excluded from 7306.11 and 7306.21. This classification ensures that specialized industrial piping for the energy sector is tracked separately from general-purpose plumbing or structural tubing.
- Covers
- Welded carbon steel oil well casing
- Electric resistance welded (ERW) tubing for gas wells
- Non-seamless drill pipe sections
- Threaded steel casing for oil extraction
- Welded steel liners for boreholes
- Also under 7306.29
- EVRAZ welded OCTG
- Tenaris welded casing
- JFE welded line pipe
- TMK welded production tubing
- Welspun welded pipes
Codes often confused with 7306.29
Common mistake. The most frequent misclassification occurs with HS code 7304.29, which is for seamless casing and tubing. Importers often confuse welded and seamless varieties. Another common error is using 7305.20, which is reserved for casing and tubing with an external diameter exceeding 406.4 mm. If the tubing is made of stainless steel, it must be classified under 7306.21. General purpose welded pipes not intended for oil/gas wells should be classified under 7306.30 or 7306.61.
Top exporters and importers of HS 730629 (the code used for steel tubing), 2025
In 2025, the largest exporter of HS 730629 (the code used for steel tubing) in UN Comtrade data was South Korea, with 30% of world exports; the largest importer in UN Comtrade data was the United States, with 76% 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 730629, not only steel tubing.
Top exporters 2025 · share of world exports
- 1 South Korea $413M 30% of world exports
- 2 United States $232M 17% of world exports
- 3 Taiwan* ~$219M 16% of world exports · partner records ↗
World total: $1.4B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $1.2B 76% of world imports
- 2 Canada $241M 16% of world imports
- 3 United Arab Emirates* ~$22M 1.4% of world imports · partner records ↗
World total: $1.5B 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 marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. 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. UN Comtrade records Taiwan as "Other Asia, not elsewhere specified". Saudi Arabia's exports under that code are left out: they are far too large to be trade with Taiwan, so mostly undisclosed partners. 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 steel tubing
Brazil classifies steel tubing under NCM 7306.29.00: HS 7306.29 with 00 added.
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 steel tubing
What is the HS code for Steel tubing?
The HS code for Steel tubing is 730629 (Iron or steel (excluding cast iron); casing and tubing of a kind used in drilling for oil and gas (other than stainless steel or seamless), n.e.c. in chapter 73). For welded casing and tubing used in oil or gas drilling (non-stainless), the HS code is 7306.29.
How do I classify Steel tubing for customs?
Steel tubing is classified under HS code 730629 — Iron or steel (excluding cast iron); casing and tubing of a kind used in drilling for oil and gas (other than stainless steel or seamless), n.e.c. in chapter 73. This is a 6-digit subheading level code.
Does this code cover seamless steel tubing?
No, seamless tubing for oil and gas applications is classified under heading 7304.
Which countries are the top exporters of steel tubing (HS 730629)?
In 2025, the top exporters of HS 730629 (the code used for steel tubing) in UN Comtrade data were South Korea ($413M, 30% of world exports), the United States ($232M) and Taiwan (about $219M). World exports came to about $1.4B, 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.
Which countries are the top importers of steel tubing (HS 730629)?
In 2025, the top importers of HS 730629 (the code used for steel tubing) in UN Comtrade data were the United States ($1.2B, 76% of world imports), Canada ($241M) and the United Arab Emirates (about $22M). World imports came to about $1.5B, 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 Steel tubing the same in all countries?
The base HS code 730629 for Steel tubing 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 steel tubing in Brazil?
In Brazil, steel tubing (HS 730629) is classified under NCM 7306.29.00.