HS code · 6-digit subheading
HS Code 8307.90 – Tubing; flexible, with or without fittings of base metal, other than those of iron or steel
HS code 8307.90 is the 6-digit subheading for tubing, flexible, with or without fittings of base metal, other than those of iron or steel. It is used for flexible copper tubing, brass gas lines, aluminum flexible ducts, nickel alloy flexible hoses and bronze corrugated tubing.
What HS 8307.90 covers
This HS code covers flexible tubing, with or without fittings, made from base metals other than iron or steel. This includes materials like copper, brass, aluminum, and nickel alloys, chosen for specific properties such as corrosion resistance, thermal conductivity, or lighter weight. These specialized flexible tubes are vital in industries requiring particular material characteristics, such as HVAC, refrigeration, medical gas systems, and certain chemical processing applications. The international trade involves specialized manufacturers and suppliers catering to niche industrial demands. Exporters are often advanced metal fabricators, while importers include specialized equipment manufacturers, system integrators, and distributors serving specific industrial sectors. Material composition, flexibility, and resistance to specific environments are crucial trade considerations.
- Covers
- Flexible copper tubing
- Brass gas lines
- Aluminum flexible ducts
- Nickel alloy flexible hoses
- Bronze corrugated tubing
- Medical gas lines (non-iron/steel)
- Flexible lead pipes
- Examples
- Mueller Streamline copper tubing
- Watts brass connector hoses
- Flexaust aluminum ducts
- Swagelok specialized metal hoses
- Danfoss flexible copper lines
Codes often confused with 8307.90
Common mistake. Iron or steel flexible tubing is 830710. Rigid tubing of these base metals is in Chapter 74 (copper), 75 (nickel), 76 (aluminum), etc. Plastic or rubber hoses are in Chapter 39 or 40.
Top exporters and importers of HS code 830790, 2025
In 2025, the largest exporter of HS code 830790 in UN Comtrade data was China, with 15% of world exports; the largest importer in UN Comtrade data was the United States, with 16% 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 $68M 15% of world exports
- 2 Germany $52M 11% of world exports
- 3 United States $49M 11% of world exports
World total: $454M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $85M 16% of world imports
- 2 France $34M 6.6% of world imports
- 3 Germany $33M 6.3% of world imports
World total: $524M 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 8307.90
Brazil does not split HS 8307.90: its NCM code is 8307.90.00.
All Brazil NCM codes in heading 83.07 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 8307.90
What is HS code 830790?
HS code 830790 is a 6-digit subheading in the Harmonized System that covers: Tubing; flexible, with or without fittings of base metal, other than those of iron or steel. This HS code covers flexible tubing, with or without fittings, made from base metals other than iron or steel. This includes materials like copper, brass, aluminum, and nickel alloys, chosen for specific properties such as corrosion resistance, thermal conductivity, or lighter weight. These specialized flexible tubes are vital in industries requiring particular material characteristics, such as HVAC, refrigeration, medical gas systems, and certain chemical processing applications. The international trade involves specialized manufacturers and suppliers catering to niche industrial demands. Exporters are often advanced metal fabricators, while importers include specialized equipment manufacturers, system integrators, and distributors serving specific industrial sectors. Material composition, flexibility, and resistance to specific environments are crucial trade considerations.
What products fall under HS code 830790?
Flexible copper tubing, brass gas lines, aluminum flexible ducts, nickel alloy flexible hoses, bronze corrugated tubing, medical gas lines (non-iron/steel), flexible lead pipes
What are common misclassifications for HS code 830790?
Iron or steel flexible tubing is 830710. Rigid tubing of these base metals is in Chapter 74 (copper), 75 (nickel), 76 (aluminum), etc. Plastic or rubber hoses are in Chapter 39 or 40.
Which countries are the top exporters of goods under HS code 830790?
In 2025, the top exporters of HS code 830790 in UN Comtrade data were China ($68M, 15% of world exports), Germany ($52M) and the United States ($49M). World exports came to about $454M, 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 830790?
In 2025, the top importers of HS code 830790 in UN Comtrade data were the United States ($85M, 16% of world imports), France ($34M) and Germany ($33M). World imports came to about $524M, 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 830790 structured?
HS code 830790 is a 6-digit subheading under the Harmonized System. The first 2 digits (83) identify the chapter, digits 3-4 (07) identify the heading, and digits 5-6 (90) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 830790?
In Brazil, HS code 830790 is NCM 8307.90.00. The last two digits are 00 because Brazil does not split this HS code further.