Product classification

HS code for Metal conduits: 8307.10

Tubing, flexible, with or without fittings, of iron or steel.

Classification of metal conduits under HS 8307.10

Metal conduits, specifically flexible tubing made of iron or steel, are classified under HS code 8307.10. This classification is based on the material composition and the physical property of flexibility. These conduits are typically constructed from spirally wound strips of iron or steel, allowing them to bend and protect electrical cables or convey fluids in environments where vibration or movement is expected. The Harmonized System places these under Chapter 83 (Miscellaneous articles of base metal) because they are considered fabricated metal products rather than structural pipes. The classification applies regardless of whether the conduit is coated with PVC or other protective layers, provided the primary structural component is the flexible metal tubing.

Covers
  • Flexible steel conduits for electrical wiring
  • Liquid-tight flexible metal conduits (LFMC)
  • Corrugated flexible tubing of iron or steel
  • Interlocked steel hoses for cable protection
  • Galvanized flexible metal pipes
Also under 8307.10
  • Anaconda Sealtite conduits
  • Titeflex metal hoses
  • Parker Hannifin hydraulic lines
  • Dorma shower hoses
  • Flex-Weld corrugated hoses

Codes often confused with 8307.10

Common mistake. Metal conduits are frequently misclassified under Chapter 73 (specifically 7304, 7305, or 7306), which covers rigid pipes and tubes of iron or steel. The defining characteristic for 8307.10 is flexibility; if the conduit is rigid, it must be moved to Chapter 73. Another misclassification occurs under 8547.90, which covers insulating fittings for electrical machines. While conduits hold wires, the tubing itself remains in 8307 unless it is heavily modified with insulating material to the point it loses its character as metal tubing.

73.04Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel73.05Iron or steel (excluding cast iron); tubes and pipes (e.g. welded, riveted or similarly closed), having circular cross-sections, external diameter of which exceeds 406.4mm, not seamless73.06Iron or steel (excluding cast iron); tubes, pipes and hollow profiles (not seamless), n.e.c. in chapter 738547.90Insulating fittings; (other than of ceramics or plastics), for electrical machines, appliances and equipment, excluding insulators of heading no. 854683.07Tubing; flexible, with or without fittings, of base metal

Top exporters and importers of HS 830710 (the code used for metal conduits), 2025

In 2025, the largest exporter of HS 830710 (the code used for metal conduits) in UN Comtrade data was China, with 16% of world exports; the largest importer in UN Comtrade data was Brazil, with 10% 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 830710, not only metal conduits.

Top exporters 2025 · share of world exports

  1. 1 China $513M
  2. 2 France $505M
  3. 3 United Kingdom $382M

World total: $3.2B Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 Brazil $315M
  2. 2 United States $272M
  3. 3 Angola $246M

World total: $3.0B 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 codes for metal conduits

Brazil splits HS 8307.10 into 2 NCM codes. Pick the one that matches your product:

  • 8307.10.10Subsea oil/gas flexible tubing, bore over 254 mm
  • 8307.10.90Other flexible tubing of iron or steel

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.

Questions about metal conduits

What is the HS code for Metal conduits?

The HS code for Metal conduits is 830710 (Tubing; flexible, with or without fittings, of iron or steel). Flexible metal conduits made of iron or steel are classified under HS code 8307.10.

How do I classify Metal conduits for customs?

Metal conduits is classified under HS code 830710 — Tubing; flexible, with or without fittings, of iron or steel. This is a 6-digit subheading level code.

What if the conduit is made of aluminum?

If the flexible conduit is made of aluminum instead of iron or steel, it is classified under HS code 8307.90.

Which countries are the top exporters of metal conduits (HS 830710)?

In 2025, the top exporters of HS 830710 (the code used for metal conduits) in UN Comtrade data were China ($513M, 16% of world exports), France ($505M) and the United Kingdom ($382M). World exports came to about $3.2B, 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 metal conduits (HS 830710)?

In 2025, the top importers of HS 830710 (the code used for metal conduits) in UN Comtrade data were Brazil ($315M, 10% of world imports), the United States ($272M) and Angola ($246M). World imports came to about $3.0B, 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 Metal conduits the same in all countries?

The base HS code 830710 for Metal conduits 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 metal conduits in Brazil?

Brazil splits HS 830710 into 2 NCM codes, so the right one for metal conduits depends on the product's details: 8307.10.10 (Subsea oil/gas flexible tubing, bore over 254 mm), 8307.10.90 (Other flexible tubing of iron or steel).