Product classification
HS code for Borosilicate glass tubes: 7002.32
Glass, unworked, tubes, of glass having a linear coefficient of expansion not exceeding 5 x 10 (to the minus 6), (or 0.000005) per Kelvin within a temperature range of 0-300 degrees C.
Classification of borosilicate glass tubes under HS 7002.32
Borosilicate glass tubes are classified under HS code 7002.32. This code is part of Chapter 70, which covers glass and glassware. Heading 7002 specifically addresses glass in the form of balls, rods, or tubes that are 'unworked,' meaning they have not been further processed into finished articles. Subheading 7002.32 is distinguished by the chemical composition and physical properties of the glass. Specifically, it must have a linear coefficient of expansion not exceeding 5 x 10^-6 per Kelvin within a temperature range of 0 to 300 degrees Celsius. This low expansion coefficient is characteristic of borosilicate glass, which is highly resistant to thermal shock. These tubes are typically used as raw materials for the production of laboratory glassware, pharmaceutical ampoules, and industrial piping. The classification requires technical documentation or testing to confirm the expansion coefficient, as this is the primary differentiator from other types of glass tubes.
- Covers
- Unworked borosilicate glass tubing
- Low-expansion glass tubes for labware production
- Neutral glass tubes for pharmaceutical packaging
- Pyrex-type glass tubes in unworked lengths
- Also under 7002.32
- Schott Duran
- Corning Pyrex
- Kimble Chase
- specific pharmaceutical glass tubing manufacturers (e.g., Gerresheimer)
Codes often confused with 7002.32
Common mistake. A common misclassification is HS code 7002.31, which is reserved for fused quartz or other fused silica tubes. Another frequent error is 7017, which covers laboratory, hygienic, or pharmaceutical glassware that has been 'worked' (e.g., graduated, stoppered, or shaped into a specific tool). If the glass tube has a higher expansion coefficient, it falls under 7002.39. Finished glass products, even if made of borosilicate, are classified according to their function rather than as raw tubes.
Top exporters and importers of HS 700232 (the code used for borosilicate glass tubes), 2025
In 2025, the largest exporter of HS 700232 (the code used for borosilicate glass tubes) in UN Comtrade data was the United States, with 28% of world exports; the largest importer in UN Comtrade data was China, with 20% 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 700232, not only borosilicate glass tubes.
Top exporters 2025 · share of world exports
- 1 United States $17M 28% of world exports
- 2 China $15M 25% of world exports
- 3 India $14M 24% of world exports
World total: $60M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 China $35M 20% of world imports
- 2 Italy $29M 17% of world imports
- 3 United States $16M 9.2% of world imports
World total: $177M 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 borosilicate glass tubes
Brazil classifies borosilicate glass tubes under NCM 7002.32.00: HS 7002.32 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
Questions about borosilicate glass tubes
What is the HS code for Borosilicate glass tubes?
The HS code for Borosilicate glass tubes is 700232 (Glass; unworked, tubes, of glass having a linear coefficient of expansion not exceeding 5 x 10 (to the minus 6), (or 0.000005) per Kelvin within a temperature range of 0-300 degrees C). The HS code for unworked tubes of glass with a linear coefficient of expansion not exceeding 5 x 10^-6 per Kelvin (0-300°C) is 7002.32.
How do I classify Borosilicate glass tubes for customs?
Borosilicate glass tubes is classified under HS code 700232 — Glass; unworked, tubes, of glass having a linear coefficient of expansion not exceeding 5 x 10 (to the minus 6), (or 0.000005) per Kelvin within a temperature range of 0-300 degrees C. This is a 6-digit subheading level code.
What does 'unworked' mean for glass tubes?
Unworked means the glass is in its original manufactured form of a tube and has not been cut to specific shapes for final use, bent, or otherwise fabricated into a finished product.
Which countries are the top exporters of borosilicate glass tubes (HS 700232)?
In 2025, the top exporters of HS 700232 (the code used for borosilicate glass tubes) in UN Comtrade data were the United States ($17M, 28% of world exports), China ($15M) and India ($14M). World exports came to about $60M, 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 borosilicate glass tubes (HS 700232)?
In 2025, the top importers of HS 700232 (the code used for borosilicate glass tubes) in UN Comtrade data were China ($35M, 20% of world imports), Italy ($29M) and the United States ($16M). World imports came to about $177M, 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 Borosilicate glass tubes the same in all countries?
The base HS code 700232 for Borosilicate glass tubes 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 borosilicate glass tubes in Brazil?
In Brazil, borosilicate glass tubes (HS 700232) is classified under NCM 7002.32.00.