HS code · 6-digit subheading
HS Code 7305.20 – Iron or steel (excluding cast iron); casing of a kind used in drilling for oil or gas (not seamless), having circular cross-sections, external diameter exceeds 406.4mm
HS code 7305.20 is the 6-digit subheading for iron or steel (excluding cast iron), casing of a kind used in drilling for oil or gas (not seamless), having circular cross-sections, external diameter exceeds 406.4mm. It is used for large diameter oil well casing, gas well casing, conductor casing, surface casing and intermediate casing.
What HS 7305.20 covers
This HS code covers large-diameter, non-seamless iron or steel casing pipes specifically designed for use in oil or gas drilling operations. Casing pipes are critical for lining the wellbore, providing structural integrity, preventing collapse, and isolating different geological formations and fluids. Countries with active oil and gas exploration and production, such as the United States, Saudi Arabia, Russia, Canada, and Brazil, are major importers of these specialized pipes. Exporters typically include global leaders in steel manufacturing and oilfield tubular goods, like China, Japan, South Korea, and European producers. The trade is highly specialized, demanding adherence to stringent industry standards such as API 5CT, and is directly influenced by global oil and gas prices, drilling activity levels, and technological advancements in extraction. Quality and reliability are paramount due to the extreme downhole conditions these pipes must endure.
- Covers
- Large diameter oil well casing
- Gas well casing
- Conductor casing
- Surface casing
- Intermediate casing
- Production casing
- Examples
- Tenaris API 5CT casing
- Vallourec large diameter casing
- JFE Steel casing
- TMK large diameter casing
Codes often confused with 7305.20
Common mistake. This code can be confused with 730511-730519 (line pipes) or 730629 (smaller casing/tubing) if the specific application (drilling casing vs. transmission line pipe) or diameter is not carefully considered. The "casing" designation is key.
Top exporters and importers of HS code 730520, 2025
In 2025, the largest exporter of HS code 730520 in UN Comtrade data was Brazil, with 29% of world exports; the largest importer in UN Comtrade data was Guyana, with about 20% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Top exporters 2025 · share of world exports
- 1 Brazil $138M 29% of world exports
- 2 Indonesia $113M 24% of world exports
- 3 Singapore $84M 18% of world exports
World total: $479M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Guyana* ~$86M 20% of world imports · partner records ↗
- 2 Singapore $67M 16% of world imports
- 3 Kuwait $53M 12% of world imports
World total: $427M 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. 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 7305.20
Brazil does not split HS 7305.20: its NCM code is 7305.20.00.
All Brazil NCM codes in heading 73.05 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
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 HS 7305.20
What is HS code 730520?
HS code 730520 is a 6-digit subheading in the Harmonized System that covers: Iron or steel (excluding cast iron); casing of a kind used in drilling for oil or gas (not seamless), having circular cross-sections, external diameter exceeds 406.4mm. This HS code covers large-diameter, non-seamless iron or steel casing pipes specifically designed for use in oil or gas drilling operations. Casing pipes are critical for lining the wellbore, providing structural integrity, preventing collapse, and isolating different geological formations and fluids. Countries with active oil and gas exploration and production, such as the United States, Saudi Arabia, Russia, Canada, and Brazil, are major importers of these specialized pipes. Exporters typically include global leaders in steel manufacturing and oilfield tubular goods, like China, Japan, South Korea, and European producers. The trade is highly specialized, demanding adherence to stringent industry standards such as API 5CT, and is directly influenced by global oil and gas prices, drilling activity levels, and technological advancements in extraction. Quality and reliability are paramount due to the extreme downhole conditions these pipes must endure.
What products fall under HS code 730520?
Large diameter oil well casing, gas well casing, conductor casing, surface casing, intermediate casing, production casing
What are common misclassifications for HS code 730520?
This code can be confused with 730511-730519 (line pipes) or 730629 (smaller casing/tubing) if the specific application (drilling casing vs. transmission line pipe) or diameter is not carefully considered. The "casing" designation is key.
Which countries are the top exporters of goods under HS code 730520?
In 2025, the top exporters of HS code 730520 in UN Comtrade data were Brazil ($138M, 29% of world exports), Indonesia ($113M) and Singapore ($84M). World exports came to about $479M, 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 goods under HS code 730520?
In 2025, the top importers of HS code 730520 in UN Comtrade data were Guyana (about $86M, 20% of world imports), Singapore ($67M) and Kuwait ($53M). World imports came to about $427M, 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.
How is HS code 730520 structured?
HS code 730520 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (05) identify the heading, and digits 5-6 (20) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 730520?
In Brazil, HS code 730520 is NCM 7305.20.00. The last two digits are 00 because Brazil does not split this HS code further.