Product classification
HS code for Flexible metal tubing: 8307.90
Tubing, flexible, with or without fittings of base metal, other than those of iron or steel.
Classification of flexible metal tubing under HS 8307.90
Flexible metal tubing made from base metals other than iron or steel is classified under HS code 8307.90. Chapter 83 encompasses miscellaneous articles of base metal. Heading 8307 specifically covers flexible tubing of base metal, with or without fittings. The classification is divided based on the material composition of the tubing. While 8307.10 is dedicated to iron or steel, 8307.90 serves as the category for tubing made from other base metals such as aluminum, copper, brass, or bronze. These products are characterized by their ability to bend or flex, often constructed from spirally wound strips or corrugated walls. They are used in various industrial, plumbing, and electrical applications where rigid piping is unsuitable due to vibration, movement, or space constraints. The presence of fittings (such as nuts, sleeves, or connectors) does not change the classification, as heading 8307 explicitly includes tubing with or without fittings. This code is vital for ensuring the correct duty rates are applied based on the specific non-ferrous metal used in the manufacturing process.
- Covers
- Flexible aluminum conduits for electrical wiring
- Brass flexible shower hoses (metal component)
- Copper flexible gas connectors
- Bronze corrugated flexible pipes
- Flexible tubing made of nickel or tin
- Non-ferrous metal bellows for exhaust systems
- Also under 8307.90
- 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. Flexible metal tubing is often misclassified under 8307.10 if the user fails to identify that the metal is non-ferrous (not iron or steel). It is also sometimes confused with HS code 3917, which is strictly for plastic tubing. If the tubing is reinforced with rubber, it may be misclassified under 4009, but if the essential character is the metal structure, 8307 remains correct.
Top exporters and importers of HS 830790 (the code used for flexible metal tubing), 2025
In 2025, the largest exporter of HS 830790 (the code used for flexible metal tubing) 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.
Figures cover everything classified under HS 830790, not only flexible metal tubing.
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 flexible metal tubing
Brazil classifies flexible metal tubing under NCM 8307.90.00: HS 8307.90 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about flexible metal tubing
What is the HS code for Flexible metal tubing?
The HS code for Flexible metal tubing is 830790 (Tubing; flexible, with or without fittings of base metal, other than those of iron or steel). For tubing made of base metals other than iron or steel, the HS code is 8307.90. For iron or steel, use 8307.10.
How do I classify Flexible metal tubing for customs?
Flexible metal tubing is classified under HS code 830790 — Tubing; flexible, with or without fittings of base metal, other than those of iron or steel. This is a 6-digit subheading level code.
Does the HS code change if the tubing has connectors?
No, HS code 8307.90 includes flexible metal tubing whether it is imported with or without fittings.
Which countries are the top exporters of flexible metal tubing (HS 830790)?
In 2025, the top exporters of HS 830790 (the code used for flexible metal tubing) 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 flexible metal tubing (HS 830790)?
In 2025, the top importers of HS 830790 (the code used for flexible metal tubing) 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.
Is the HS code for Flexible metal tubing the same in all countries?
The base HS code 830790 for Flexible metal tubing 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 flexible metal tubing in Brazil?
In Brazil, flexible metal tubing (HS 830790) is classified under NCM 8307.90.00.