HS code · 6-digit subheading
HS Code 3917.31 – Plastics; tubes, pipes and hoses thereof, flexible, having a minimum burst pressure of 27.6MPa
HS code 3917.31 is the 6-digit subheading for plastics, tubes, pipes and hoses thereof, flexible, having a minimum burst pressure of 27.6MPa. It is used for high-pressure hydraulic hoses, reinforced pneumatic tubing, automotive brake lines (plastic core), industrial spray hoses and fuel injection lines (plastic).
What HS 3917.31 covers
This HS code specifically targets flexible tubes, pipes, and hoses made of plastics that are engineered to withstand extremely high pressures, defined by a minimum burst pressure of 27.6 Megapascals (approximately 4000 psi). These are not your everyday garden hoses; they are critical components in demanding industrial, hydraulic, and pneumatic systems. Importers are typically manufacturers of heavy machinery, automotive components, aerospace equipment, and specialized industrial equipment where high-pressure fluid transfer is essential. Exporters are highly specialized manufacturers of reinforced plastic hoses, often incorporating multiple layers or textile/wire braiding. The trade is driven by the need for reliable and safe high-pressure fluid conveyance. Key considerations include the specific polymer composition, reinforcement materials, temperature range, chemical compatibility, and adherence to stringent safety standards and certifications. These products are vital for the safe and efficient operation of high-performance systems.
- Covers
- High-pressure hydraulic hoses
- Reinforced pneumatic tubing
- Automotive brake lines (plastic core)
- Industrial spray hoses
- Fuel injection lines (plastic)
- High-pressure chemical transfer hoses
- Robotic arm hoses
- Power steering hoses (plastic)
- Examples
- Parker Hannifin hydraulic hoses
- Eaton Aeroquip high-pressure hoses
- Gates industrial hoses
- Continental Contitech high-pressure plastic hoses
Codes often confused with 3917.31
Common mistake. This code is often confused with other flexible plastic tubes/hoses (e.g., 391739) if the specific burst pressure rating is not known or if it falls below the 27.6MPa threshold.
Top exporters and importers of HS code 391731, 2025
In 2025, the largest exporter of HS code 391731 in UN Comtrade data was China, with 25% of world exports; the largest importer in UN Comtrade data was the United States, with 8.0% 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 $401M 25% of world exports
- 2 United Kingdom $148M 9.1% of world exports
- 3 Germany $146M 9.0% of world exports
World total: $1.6B Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 United States $123M 8.0% of world imports
- 2 China $105M 6.8% of world imports
- 3 France $90M 5.8% of world imports
World total: $1.5B 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 3917.31
Brazil does not split HS 3917.31: its NCM code is 3917.31.00.
All Brazil NCM codes in heading 39.17 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 3917.31
What is HS code 391731?
HS code 391731 is a 6-digit subheading in the Harmonized System that covers: Plastics; tubes, pipes and hoses thereof, flexible, having a minimum burst pressure of 27.6MPa. This HS code specifically targets flexible tubes, pipes, and hoses made of plastics that are engineered to withstand extremely high pressures, defined by a minimum burst pressure of 27.6 Megapascals (approximately 4000 psi). These are not your everyday garden hoses; they are critical components in demanding industrial, hydraulic, and pneumatic systems. Importers are typically manufacturers of heavy machinery, automotive components, aerospace equipment, and specialized industrial equipment where high-pressure fluid transfer is essential. Exporters are highly specialized manufacturers of reinforced plastic hoses, often incorporating multiple layers or textile/wire braiding. The trade is driven by the need for reliable and safe high-pressure fluid conveyance. Key considerations include the specific polymer composition, reinforcement materials, temperature range, chemical compatibility, and adherence to stringent safety standards and certifications. These products are vital for the safe and efficient operation of high-performance systems.
What products fall under HS code 391731?
High-pressure hydraulic hoses, Reinforced pneumatic tubing, Automotive brake lines (plastic core), Industrial spray hoses, Fuel injection lines (plastic), High-pressure chemical transfer hoses, Robotic arm hoses, Power steering hoses (plastic)
What are common misclassifications for HS code 391731?
This code is often confused with other flexible plastic tubes/hoses (e.g., 391739) if the specific burst pressure rating is not known or if it falls below the 27.6MPa threshold.
Which countries are the top exporters of goods under HS code 391731?
In 2025, the top exporters of HS code 391731 in UN Comtrade data were China ($401M, 25% of world exports), the United Kingdom ($148M) and Germany ($146M). World exports came to about $1.6B, 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 391731?
In 2025, the top importers of HS code 391731 in UN Comtrade data were the United States ($123M, 8.0% of world imports), China ($105M) and France ($90M). World imports came to about $1.5B, 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.
How is HS code 391731 structured?
HS code 391731 is a 6-digit subheading under the Harmonized System. The first 2 digits (39) identify the chapter, digits 3-4 (17) identify the heading, and digits 5-6 (31) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 391731?
In Brazil, HS code 391731 is NCM 3917.31.00. The last two digits are 00 because Brazil does not split this HS code further.