HS code · 6-digit subheading
HS Code 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
HS code 7002.32 is the 6-digit subheading for 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. It is used for borosilicate glass laboratory tubes, pharmaceutical glass tubing, heat-resistant industrial glass tubes, thermometer glass blanks and solar collector tubes (unworked).
What HS 7002.32 covers
This HS code specifies unworked glass tubes characterized by a very low linear coefficient of thermal expansion (CTE), not exceeding 5 x 10⁻⁶ per Kelvin within a temperature range of 0-300 degrees C. This property typically indicates borosilicate glass or similar heat-resistant compositions, making them ideal for applications requiring high thermal shock resistance and dimensional stability under varying temperatures. These tubes are crucial for laboratory glassware, pharmaceutical packaging, and specific industrial process equipment. Major traders include specialized glass manufacturers, pharmaceutical suppliers, and scientific equipment distributors. The low CTE is a critical performance characteristic distinguishing these tubes, ensuring reliability and safety in demanding environments where thermal stress is a concern.
- Covers
- Borosilicate glass laboratory tubes
- Pharmaceutical glass tubing
- Heat-resistant industrial glass tubes
- Thermometer glass blanks
- Solar collector tubes (unworked)
- High-temperature process tubes
- Medical glass tubing
- Examples
- Schott Duran
- Corning Pyrex
- Kimble Chase
- specific pharmaceutical glass tubing manufacturers (e.g., Gerresheimer)
Codes often confused with 7002.32
Common mistake. Can be confused with 700239 (other unworked glass tubes) if the specific CTE property is not verified, or 7017 (laboratory, hygienic or pharmaceutical glassware) if already formed into finished articles.
Top exporters and importers of HS code 700232, 2025
In 2025, the largest exporter of HS code 700232 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.
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 7002.32
Brazil does not split HS 7002.32: its NCM code is 7002.32.00.
All Brazil NCM codes in heading 70.02 →
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.
Questions about HS 7002.32
What is HS code 700232?
HS code 700232 is a 6-digit subheading in the Harmonized System that covers: 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 HS code specifies unworked glass tubes characterized by a very low linear coefficient of thermal expansion (CTE), not exceeding 5 x 10⁻⁶ per Kelvin within a temperature range of 0-300 degrees C. This property typically indicates borosilicate glass or similar heat-resistant compositions, making them ideal for applications requiring high thermal shock resistance and dimensional stability under varying temperatures. These tubes are crucial for laboratory glassware, pharmaceutical packaging, and specific industrial process equipment. Major traders include specialized glass manufacturers, pharmaceutical suppliers, and scientific equipment distributors. The low CTE is a critical performance characteristic distinguishing these tubes, ensuring reliability and safety in demanding environments where thermal stress is a concern.
What products fall under HS code 700232?
Borosilicate glass laboratory tubes, pharmaceutical glass tubing, heat-resistant industrial glass tubes, thermometer glass blanks, solar collector tubes (unworked), high-temperature process tubes, medical glass tubing
What are common misclassifications for HS code 700232?
Can be confused with 700239 (other unworked glass tubes) if the specific CTE property is not verified, or 7017 (laboratory, hygienic or pharmaceutical glassware) if already formed into finished articles.
Which countries are the top exporters of goods under HS code 700232?
In 2025, the top exporters of HS code 700232 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 goods under HS code 700232?
In 2025, the top importers of HS code 700232 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.
How is HS code 700232 structured?
HS code 700232 is a 6-digit subheading under the Harmonized System. The first 2 digits (70) identify the chapter, digits 3-4 (02) identify the heading, and digits 5-6 (32) specify the subheading. This code is standardized globally by the World Customs Organization.
What is the Brazil NCM code for HS code 700232?
In Brazil, HS code 700232 is NCM 7002.32.00. The last two digits are 00 because Brazil does not split this HS code further.