Product classification
HS code for Oilfield drill pipe: 7304.23
Iron or steel (excluding cast iron or stainless steel), seamless, drill pipe, of a kind used in drilling for oil or gas.
Classification of oilfield drill pipe under HS 7304.23
HS code 730423 is designated for seamless drill pipe made of iron or steel, specifically excluding stainless steel. Drill pipe is a heavy-duty, seamless tube that rotates the drill bit and circulates drilling fluid. The seamless nature is a critical classification factor because it allows the pipe to withstand the extreme torsional stress and internal pressures encountered during deep-well drilling. Under the Harmonized System, seamless tubes and pipes are categorized in heading 7304. Subheading 730423 is specific to drill pipe used in oil or gas exploration, distinguishing it from standard casing or tubing. The manufacturing process involves piercing a solid billet to create the hollow shell, ensuring there is no welded seam that could act as a point of failure. This high-strength requirement is why seamless pipes are separated from welded varieties in the tariff schedule. Drill pipes are typically threaded at both ends with specialized tool joints to allow for the assembly of a drill string. The classification remains 730423 regardless of the specific grade of steel (e.g., E-75, X-95, G-105, S-135), provided it is not stainless steel. The absence of a seam is the defining physical characteristic that customs authorities look for during inspection.
- Covers
- Seamless steel drill pipe
- Heavy-weight drill pipe (HWDP)
- API Grade E drill pipe
- High-tensile seamless drill string components
- Seamless iron drill pipe
- Also under 7304.23
- Tenaris API 5DP drill pipe
- Vallourec drill pipe
- Sumitomo Metal Industries drill pipe
- JFE Steel drill pipe
- TMK drill pipe
Codes often confused with 7304.23
Common mistake. Drill pipe is frequently misclassified under 730422 if it is made of stainless steel, or under 730520 if it is a welded pipe of large diameter. It is also sometimes incorrectly categorized under 843143 as a part for boring or sinking machinery; however, the HS nomenclature prioritizes the material and form (pipe) over the machine part status.
Top exporters and importers of HS 730423 (the code used for oilfield drill pipe), 2025
In 2025, the largest exporter of HS 730423 (the code used for oilfield drill pipe) in UN Comtrade data was China, with 37% of world exports; the largest importer in UN Comtrade data was the United States, with 11% 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 730423, not only oilfield drill pipe.
Top exporters 2025 · share of world exports
- 1 China $137M 37% of world exports
- 2 United States $36M 9.7% of world exports
- 3 Mexico $33M 8.9% of world exports
World total: $369M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $66M 11% of world imports
- 2 Kuwait $43M 7.2% of world imports
- 3 Thailand $30M 5.1% of world imports
World total: $596M 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 oilfield drill pipe
Brazil splits HS 7304.23 into 2 NCM codes. Pick the one that matches your product:
- 7304.23.10Seamless non-alloy steel drill pipe
- 7304.23.90Other seamless drill pipe, not stainless
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 drill pipe
What is the HS code for Oilfield drill pipe?
The HS code for Oilfield drill pipe is 730423 (Iron or steel (excluding cast iron or stainless steel); seamless, drill pipe, of a kind used in drilling for oil or gas). The HS code for seamless iron or steel (non-stainless) drill pipe is 730423.
How do I classify Oilfield drill pipe for customs?
Oilfield drill pipe is classified under HS code 730423 — Iron or steel (excluding cast iron or stainless steel); seamless, drill pipe, of a kind used in drilling for oil or gas. This is a 6-digit subheading level code.
Can welded drill pipe be classified here?
No, welded drill pipe is classified under heading 7305 or 7306 depending on its diameter and manufacturing method.
Which countries are the top exporters of oilfield drill pipe (HS 730423)?
In 2025, the top exporters of HS 730423 (the code used for oilfield drill pipe) in UN Comtrade data were China ($137M, 37% of world exports), the United States ($36M) and Mexico ($33M). World exports came to about $369M, 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 drill pipe (HS 730423)?
In 2025, the top importers of HS 730423 (the code used for oilfield drill pipe) in UN Comtrade data were the United States ($66M, 11% of world imports), Kuwait ($43M) and Thailand ($30M). World imports came to about $596M, 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 drill pipe the same in all countries?
The base HS code 730423 for Oilfield drill 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 oilfield drill pipe in Brazil?
Brazil splits HS 730423 into 2 NCM codes, so the right one for oilfield drill pipe depends on the product's details: 7304.23.10 (Seamless non-alloy steel drill pipe), 7304.23.90 (Other seamless drill pipe, not stainless).