# United States tariff lines under HS 3917.21

> The United States tariff splits HS 3917.21 (tubes, pipes and hoses, rigid: Of polymers of ethylene) into 1 national line: 3917.21.00.00 (of polymers of ethylene). The general (MFN) duty is 3.1% on this line.

Source: https://border.bot/countries/united-states/hs-codes/391721
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 39](https://border.bot/countries/united-states/hs-codes/39) / [3917.21](https://border.bot/countries/united-states/hs-codes/391721)

## Key facts

- HS subheading: [3917.21](https://border.bot/hs-codes/391721)
- Duty (MFN): 3.1%
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 39: Plastics and articles thereof

## United States lines under 3917.21

The United States tariff splits HS 3917.21 (tubes, pipes and hoses, rigid: Of polymers of ethylene) into 1 national line: 3917.21.00.00 (of polymers of ethylene).

The general (MFN) duty is 3.1% on this line.

- [3917.21.00.00](https://border.bot/countries/united-states/hs-codes/3917210000) Tubes, pipes and hoses, rigid, Of polymers of ethylene. Duty (MFN): 3.1%

## In other countries

No other national tariff on border.bot has live lines under 3917.21 yet.

- [The Harmonized System text for 3917.21](https://border.bot/hs-codes/391721)

- Previous subheading: [3917.10](https://border.bot/countries/united-states/hs-codes/391710) Artificial guts (sausage casings) of hardened protein or of cellulosic plastics materials
- Next subheading: [3917.22](https://border.bot/countries/united-states/hs-codes/391722) Tubes, pipes and hoses and fittings therefor (for example, joints, elbows, flanges), of plastics

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 3917.21?

The United States tariff splits HS 3917.21 (tubes, pipes and hoses, rigid: Of polymers of ethylene) into 1 national line: 3917.21.00.00 (of polymers of ethylene).

### What is the duty on HS 3917.21 in the United States?

The general (MFN) duty is 3.1% on this line.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/391721.json