Product classification
HS code for Gas cylinders: 7311.00
Containers for compressed or liquefied gas, of iron or steel.
Classification of gas cylinders under HS 7311.00
HS code 7311.00 is the designated classification for containers for compressed or liquefied gas made of iron or steel. This heading is specific to the material (ferrous metal) and the intended use (containing pressurized gas). Under the Harmonized System, containers are often classified by their material composition. Therefore, 7311.00 covers a wide range of steel vessels, from small portable canisters to large industrial cylinders. The classification remains consistent regardless of the specific gas contained (e.g., oxygen, nitrogen, propane, or refrigerant), provided the container is designed to withstand pressure. The construction method—whether seamless or welded—does not change the four-digit heading but may influence national-level tariff lines. This code is vital for the global trade of energy products and industrial gases, ensuring that safety-regulated pressure vessels are correctly identified for customs and safety inspections. The container must be designed for a pressure exceeding 0.5 bar to generally be considered a pressure vessel under this heading.
- Covers
- Seamless steel cylinders for high-pressure gases
- Welded steel bottles for liquefied petroleum gas (LPG)
- Portable oxygen tanks made of steel
- Refrigerant gas recovery cylinders
- Accumulators for hydraulic systems (if designed as gas containers)
- Also under 7311.00
- Airgas oxygen tanks
- Worthington propane cylinders
- Luxfer scuba tanks
- SodaStream CO2 cylinders
- Praxair industrial gas tanks
Codes often confused with 7311.00
Common mistake. A frequent mistake is classifying aluminum gas cylinders under 7311.00. Aluminum containers belong in 7613.00. Furthermore, 7310 is often confused with 7311; however, 7310 is for tanks, casks, and drums for any material (usually liquids or solids) not exceeding 300 liters, whereas 7311 is specifically for compressed or liquefied gas regardless of the volume, provided they are pressure vessels. Additionally, if the cylinder is part of a fire extinguisher, it should be classified under 8424.10.
Top exporters and importers of HS 731100 (the code used for gas cylinders), 2025
In 2025, the largest exporter of HS 731100 (the code used for gas cylinders) in UN Comtrade data was China, with 29% of world exports; the largest importer in UN Comtrade data was the United States, with 12% 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 731100, not only gas cylinders.
Top exporters 2025 · share of world exports
- 1 China $1.3B 29% of world exports
- 2 United States $326M 7.3% of world exports
- 3 Türkiye $283M 6.3% of world exports
World total: $4.5B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $503M 12% of world imports
- 2 Germany $215M 5.2% of world imports
- 3 South Korea $213M 5.2% of world imports
World total: $4.1B 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 gas cylinders
Brazil classifies gas cylinders under NCM 7311.00.00: HS 7311.00 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 gas cylinders
What is the HS code for Gas cylinders?
The HS code for Gas cylinders is 731100 (Containers for compressed or liquefied gas, of iron or steel). The HS code for iron or steel containers for compressed or liquefied gas is 7311.00.
How do I classify Gas cylinders for customs?
Gas cylinders is classified under HS code 731100 — Containers for compressed or liquefied gas, of iron or steel. This is a 6-digit subheading level code.
Does this code cover aluminum gas tanks?
No, aluminum gas cylinders are classified under HS code 7613.00, as the classification is material-dependent.
Which countries are the top exporters of gas cylinders (HS 731100)?
In 2025, the top exporters of HS 731100 (the code used for gas cylinders) in UN Comtrade data were China ($1.3B, 29% of world exports), the United States ($326M) and Türkiye ($283M). World exports came to about $4.5B, 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.
Which countries are the top importers of gas cylinders (HS 731100)?
In 2025, the top importers of HS 731100 (the code used for gas cylinders) in UN Comtrade data were the United States ($503M, 12% of world imports), Germany ($215M) and South Korea ($213M). World imports came to about $4.1B, 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 Gas cylinders the same in all countries?
The base HS code 731100 for Gas cylinders 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 gas cylinders in Brazil?
In Brazil, gas cylinders (HS 731100) is classified under NCM 7311.00.00.