HS code · 6-digit subheading
HS Code 7311.00 – Containers for compressed or liquefied gas, of iron or steel
HS code 7311.00 is the 6-digit subheading for containers for compressed or liquefied gas, of iron or steel. It is used for oxygen cylinders, propane tanks, acetylene cylinders, CO2 cylinders and nitrogen tanks.
What HS 7311.00 covers
This HS code specifically covers robust containers made of iron or steel, engineered to safely store compressed or liquefied gases. These high-pressure vessels are critical components across a multitude of industries, including healthcare (oxygen, nitrous oxide), manufacturing (acetylene, argon for welding), energy (propane, natural gas), and leisure (scuba diving tanks). Importers are typically industrial gas suppliers, medical facilities, welding shops, and distributors of consumer gas products. Exporters are specialized manufacturers with expertise in high-pressure vessel design and safety standards. Key considerations in international trade include stringent safety certifications (e.g., DOT, ISO), material strength, valve compatibility, and regular inspection requirements, which are paramount due to the inherent risks associated with pressurized contents. The global demand for these containers is driven by industrial growth and healthcare needs.
- Covers
- Oxygen cylinders
- Propane tanks
- Acetylene cylinders
- CO2 cylinders
- Nitrogen tanks
- Scuba tanks (steel)
- Helium tanks
- Examples
- Airgas oxygen tanks
- Worthington propane cylinders
- Luxfer scuba tanks
- SodaStream CO2 cylinders
- Praxair industrial gas tanks
Codes often confused with 7311.00
Common mistake. Can be confused with non-pressure containers in 7310 if the gas storage purpose isn't clear, or with aluminum gas cylinders in 7613 if the material is not confirmed as iron or steel.
Top exporters and importers of HS code 731100, 2025
In 2025, the largest exporter of HS code 731100 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.
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 7311.00
Brazil does not split HS 7311.00: its NCM code is 7311.00.00.
All Brazil NCM codes in heading 73.11 →
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 7311.00
What is HS code 731100?
HS code 731100 is a 6-digit subheading in the Harmonized System that covers: Containers for compressed or liquefied gas, of iron or steel. This HS code specifically covers robust containers made of iron or steel, engineered to safely store compressed or liquefied gases. These high-pressure vessels are critical components across a multitude of industries, including healthcare (oxygen, nitrous oxide), manufacturing (acetylene, argon for welding), energy (propane, natural gas), and leisure (scuba diving tanks). Importers are typically industrial gas suppliers, medical facilities, welding shops, and distributors of consumer gas products. Exporters are specialized manufacturers with expertise in high-pressure vessel design and safety standards. Key considerations in international trade include stringent safety certifications (e.g., DOT, ISO), material strength, valve compatibility, and regular inspection requirements, which are paramount due to the inherent risks associated with pressurized contents. The global demand for these containers is driven by industrial growth and healthcare needs.
What products fall under HS code 731100?
Oxygen cylinders, propane tanks, acetylene cylinders, CO2 cylinders, nitrogen tanks, scuba tanks (steel), helium tanks
What are common misclassifications for HS code 731100?
Can be confused with non-pressure containers in 7310 if the gas storage purpose isn't clear, or with aluminum gas cylinders in 7613 if the material is not confirmed as iron or steel.
Which countries are the top exporters of goods under HS code 731100?
In 2025, the top exporters of HS code 731100 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 goods under HS code 731100?
In 2025, the top importers of HS code 731100 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.
How is HS code 731100 structured?
HS code 731100 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (11) identify the heading, and digits 5-6 (00) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 731100?
In Brazil, HS code 731100 is NCM 7311.00.00. The last two digits are 00 because Brazil does not split this HS code further.