Product classification
HS code for Oilfield 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 oilfield tubing under HS 7306.29
Oilfield tubing under HS code 730629 includes welded casing and tubing used in oil and gas drilling that is not made of stainless steel and does not exceed the diameter limits of heading 7305. This code serves as a residual category for welded oil-country tubular goods (OCTG) that are not elsewhere specified. Tubing is the pipe through which oil or gas is produced from the wellbore to the surface. The classification depends on the welding method (such as Electric Resistance Welding or ERW) and the intended use in the petroleum industry. It is distinct from seamless tubing (7304) and large-diameter welded casing (7305). Importers must be careful to distinguish between tubing (used for production) and casing (used for structural lining), although they often fall under the same subheadings if the manufacturing method and material are identical. The 730629 code is specifically for items that are not stainless steel; stainless steel versions would fall under 730621. This classification requires the product to be of a kind used in drilling for oil or gas, which implies specific threading and pressure-bearing capabilities that standard structural pipes do not possess.
- Covers
- Electric resistance welded (ERW) production tubing
- Welded steel casing (diameter ≤ 406.4mm)
- Non-seamless oilfield production pipes
- Welded iron tubing for gas wells
- Carbon steel welded OCTG tubing
- 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 common misclassification is with 730429, which is for seamless tubing. Another common error is using 730630, which is for general-purpose welded pipes of circular cross-section. Because oilfield tubing is a specialized product, it must stay within the 73062x subseries.
Top exporters and importers of HS 730629 (the code used for oilfield tubing), 2025
In 2025, the largest exporter of HS 730629 (the code used for oilfield 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 oilfield 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 oilfield tubing
Brazil classifies oilfield 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 oilfield tubing
What is the HS code for Oilfield tubing?
The HS code for Oilfield 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).
How do I classify Oilfield tubing for customs?
Oilfield 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.
What is the HS code for welded oilfield tubing?
The HS code for welded iron or steel (non-stainless) oilfield tubing is 730629.
What is the difference between 730629 and 730520?
730629 is for welded pipes with a diameter of 406.4 mm or less, while 730520 is for welded pipes with a diameter greater than 406.4 mm.
Which countries are the top exporters of oilfield tubing (HS 730629)?
In 2025, the top exporters of HS 730629 (the code used for oilfield 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 oilfield tubing (HS 730629)?
In 2025, the top importers of HS 730629 (the code used for oilfield 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 Oilfield tubing the same in all countries?
The base HS code 730629 for Oilfield 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 oilfield tubing in Brazil?
In Brazil, oilfield tubing (HS 730629) is classified under NCM 7306.29.00.