Product classification

HS code for Seamless steel 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 seamless steel drill pipe under HS 7304.23

Seamless steel drill pipe is classified under HS code 7304.23. This classification is highly specific to the oil and gas industry, falling under the broader heading 7304 for seamless iron or steel tubes. Drill pipe is a heavy-duty seamless pipe that provides the rotational force and carries the drilling fluid to the drill bit in a wellbore. The classification 7304.23 is reserved for drill pipe made of iron or steel (excluding stainless steel). The "seamless" requirement is critical, as these pipes must withstand extreme torsional stress, which welded pipes often cannot. The classification is driven by the product's specialized end-use in drilling operations and its technical specifications, which usually align with API 5DP standards. Unlike general tubing, drill pipe features threaded ends (tool joints) that allow for the connection of multiple sections into a drill string.

Covers
  • Seamless heavy-weight drill pipe (HWDP)
  • Standard seamless drill pipe for oil/gas exploration
  • API 5DP certified seamless drill strings
  • High-torque seamless drill pipes
  • Internal upset or external upset drill pipes
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. A common mistake is classifying drill pipe under 7304.29, which is the code for casing and tubing. While all three are OCTG products, drill pipe is functionally distinct and has its own dedicated subheading at 7304.23. Another error involves classifying drill pipe as a part of a boring machine under heading 8431. However, according to the Section XV notes of the Harmonized System, base metal pipes are generally classified in Chapter 73 even if they are designed for use in specific machinery, provided they retain the character of a pipe. Finally, if the drill pipe is made of stainless steel, it would be classified under 7304.41 or 7304.49, not 7304.23.

7304.29Iron or steel (excluding cast iron or stainless steel); seamless, casing and tubing, of a kind used in drilling for oil or gas84.31Machinery parts; used solely or principally with the machinery of heading no. 8425 to 84307304.41Steel, stainless; cold-drawn or cold-rolled (cold-reduced), tubes and pipes of circular cross-section7304.49Steel, stainless; (excluding cold-drawn or cold-rolled), tubes pipes and hollow profiles of circular cross-section

Top exporters and importers of HS 730423 (the code used for seamless steel drill pipe), 2025

In 2025, the largest exporter of HS 730423 (the code used for seamless steel 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 seamless steel drill pipe.

Top exporters 2025 · share of world exports

  1. 1 China $137M
  2. 2 United States $36M
  3. 3 Mexico $33M

World total: $369M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 United States $66M
  2. 2 Kuwait $43M
  3. 3 Thailand $30M

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 seamless steel drill pipe

Brazil splits HS 7304.23 into 2 NCM codes. Pick the one that matches your product:

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 seamless steel drill pipe

What is the HS code for Seamless steel drill pipe?

The HS code for Seamless steel 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 specific HS code for seamless steel drill pipe used in oil or gas drilling is 7304.23.

How do I classify Seamless steel drill pipe for customs?

Seamless steel 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.

Are tool joints classified separately from the drill pipe?

If the tool joints are already attached to the drill pipe at the time of import, the entire assembly is classified as drill pipe under 7304.23. If tool joints are imported separately as pipe fittings, they are classified under heading 7307.

Which countries are the top exporters of seamless steel drill pipe (HS 730423)?

In 2025, the top exporters of HS 730423 (the code used for seamless steel 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 seamless steel drill pipe (HS 730423)?

In 2025, the top importers of HS 730423 (the code used for seamless steel 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 Seamless steel drill pipe the same in all countries?

The base HS code 730423 for Seamless steel 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 seamless steel drill pipe in Brazil?

Brazil splits HS 730423 into 2 NCM codes, so the right one for seamless steel 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).