Product classification
HS code for Stainless steel casing: 7306.21
Steel, stainless, casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless).
Classification of stainless steel casing under HS 7306.21
The classification of stainless steel casing under HS code 7306.21 is determined by its material composition, manufacturing method, and specific industrial application. As an article of iron or steel, it falls within Chapter 73. Specifically, heading 7306 covers tubes, pipes, and hollow profiles that are welded, riveted, or similarly closed, distinguishing them from the seamless varieties found in heading 7304. The subheading 7306.21 is reserved for casing and tubing of a kind used in drilling for oil or gas, made specifically from stainless steel. This classification requires the product to meet the metallurgical definition of stainless steel, which typically involves a minimum chromium content of 10.5% by weight. The welded nature of the pipe is a primary identifier; these pipes are formed by rolling steel strips and welding the longitudinal or spiral seam. Because these products are engineered to withstand the corrosive environments and high pressures associated with oil and gas extraction, their specific functional design dictates their placement in this category rather than under general-purpose welded pipes. According to the General Rules of Interpretation (GRI) 1 and 6, the specific use as oil-well casing takes precedence over more general pipe classifications.
- Covers
- Welded stainless steel oil-well casing
- Welded stainless steel tubing for gas extraction
- Corrosion-resistant welded pipes for offshore drilling
- Stainless steel drill pipes with longitudinal seams
- Also under 7306.21
- Tenaris stainless OCTG (welded)
- Vallourec stainless casing (welded)
- Sumitomo Metal stainless tubing
- JFE Steel stainless well pipes
- Sandvik corrosion-resistant tubing
Codes often confused with 7306.21
Common mistake. This product is frequently confused with HS code 7304.22, which covers seamless stainless steel casing. The primary difference lies in the manufacturing process; 7304.22 is for pipes without a weld seam. Additionally, it may be misclassified under 7306.29 if the material is not stainless steel (e.g., other alloy steel or carbon steel). General-purpose welded stainless pipes fall under 7306.40, but if they are specifically designed for oil and gas drilling, 7306.21 must be used.
Top exporters and importers of HS 730621 (the code used for stainless steel casing), 2025
In 2025, the largest exporter of HS 730621 (the code used for stainless steel casing) in UN Comtrade data was Malaysia, with 16% of world exports; the largest importer in UN Comtrade data was India, with 21% 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 730621, not only stainless steel casing.
Top exporters 2025 · share of world exports
- 1 Malaysia $3.7M 16% of world exports
- 2 China $3.6M 15% of world exports
- 3 France $3.0M 12% of world exports
World total: $24M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 India $9.4M 21% of world imports
- 2 Philippines $4.7M 10% of world imports
- 3 Spain $4.4M 9.7% of world imports
World total: $46M 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 code for stainless steel casing
Brazil classifies stainless steel casing under NCM 7306.21.00: HS 7306.21 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 stainless steel casing
What is the HS code for Stainless steel casing?
The HS code for Stainless steel casing is 730621 (Steel, stainless; casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless)). The HS code for welded stainless steel casing used in oil and gas drilling is 7306.21.
How do I classify Stainless steel casing for customs?
Stainless steel casing is classified under HS code 730621 — Steel, stainless; casing and tubing of a kind used in drilling for oil and gas, n.e.c. in chapter 73, welded, (not seamless). This is a 6-digit subheading level code.
Does this code include seamless casing?
No, seamless stainless steel casing is classified under heading 7304, specifically 7304.22.
Which countries are the top exporters of stainless steel casing (HS 730621)?
In 2025, the top exporters of HS 730621 (the code used for stainless steel casing) in UN Comtrade data were Malaysia ($3.7M, 16% of world exports), China ($3.6M) and France ($3.0M). World exports came to about $24M, 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 stainless steel casing (HS 730621)?
In 2025, the top importers of HS 730621 (the code used for stainless steel casing) in UN Comtrade data were India ($9.4M, 21% of world imports), the Philippines ($4.7M) and Spain ($4.4M). World imports came to about $46M, 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 Stainless steel casing the same in all countries?
The base HS code 730621 for Stainless steel casing 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 stainless steel casing in Brazil?
In Brazil, stainless steel casing (HS 730621) is classified under NCM 7306.21.00.