Product classification
HS code for Flexible steel tubing: 8307.10
Tubing, flexible, with or without fittings, of iron or steel.
Classification of flexible steel tubing under HS 8307.10
Flexible steel tubing is classified under HS code 8307.10, which falls within Chapter 83 of the Harmonized System, covering miscellaneous articles of base metal. Heading 8307 is specifically dedicated to flexible tubing of base metal, with or without fittings. The sub-classification 8307.10 is restricted to tubing made of iron or steel. This classification is determined by the flexible nature of the tube, which is often achieved through a spiral-wound, interlocked, or corrugated construction. Unlike rigid pipes found in Chapter 73, these products are designed to bend and flex without breaking, making them suitable for vibration dampening, thermal expansion compensation, or protecting electrical cables in tight spaces. The presence of fittings does not change the classification under this heading, as 8307 explicitly includes tubing with or without attachments. The material must be predominantly iron or steel; if the tubing is made of other base metals like aluminum or copper, it would fall under 8307.90. This code is vital for industrial suppliers of conduit and high-temperature exhaust connectors.
- Covers
- Interlocked flexible steel hoses
- Corrugated stainless steel tubing (CSST)
- Flexible steel conduit for electrical wiring
- Galvanized flexible steel tubes
- Stainless steel bellows-type flexible connectors
- 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. The most common misclassification occurs with Chapter 73 (specifically 7304, 7305, or 7306), which covers rigid iron or steel pipes. Flexible steel tubing is also sometimes confused with 8307.90, which is the category for flexible tubing made of metals other than iron or steel, such as aluminum or brass.
Top exporters and importers of HS 830710 (the code used for flexible steel tubing), 2025
In 2025, the largest exporter of HS 830710 (the code used for flexible steel tubing) 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 flexible steel tubing.
Top exporters 2025 · share of world exports
- 1 China $513M 16% of world exports
- 2 France $505M 16% of world exports
- 3 United Kingdom $382M 12% of world exports
World total: $3.2B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Brazil $315M 10% of world imports
- 2 United States $272M 9.0% of world imports
- 3 Angola $246M 8.2% of world imports
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 flexible steel tubing
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 flexible steel tubing
What is the HS code for Flexible steel tubing?
The HS code for Flexible steel tubing is 830710 (Tubing; flexible, with or without fittings, of iron or steel). The HS code for flexible tubing made of iron or steel is 8307.10.
How do I classify Flexible steel tubing for customs?
Flexible steel tubing is classified under HS code 830710 — Tubing; flexible, with or without fittings, of iron or steel. This is a 6-digit subheading level code.
Does 8307.10 include stainless steel flexible hoses?
Yes, stainless steel is a type of steel, and flexible hoses made from it are classified under 8307.10.
Which countries are the top exporters of flexible steel tubing (HS 830710)?
In 2025, the top exporters of HS 830710 (the code used for flexible steel tubing) 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 flexible steel tubing (HS 830710)?
In 2025, the top importers of HS 830710 (the code used for flexible steel tubing) 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 Flexible steel tubing the same in all countries?
The base HS code 830710 for Flexible steel 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 steel tubing in Brazil?
Brazil splits HS 830710 into 2 NCM codes, so the right one for flexible steel tubing 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).