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 v2017 Code: 700232

About 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 700232 covers the import and export of unworked glass tubes with a specific linear coefficient of expansion. This type of specialized glass is crucial for a variety of industries, including electronics, scientific equipment, and certain construction applications. As a key component in many high-precision and high-temperature products, the global trade of this glass material plays an important role in the broader economy.

Production process

The production of the glass tubes described by HS code 700232 typically involves a multi-step process. First, the raw materials, such as silica sand, limestone, and other mineral additives, are carefully measured and melted at high temperatures. The molten glass is then formed into tubes through a process of drawing, where the glass is pulled through an orifice to create the desired diameter and wall thickness. Finally, the tubes undergo annealing, a controlled cooling process that helps to relieve internal stresses and improve the glass's durability and thermal resistance.

Production inputs

The main inputs required for the production of the glass tubes covered by HS code 700232 include high-purity silica sand, limestone, and other mineral additives. Specialized furnaces and drawing equipment are also essential for the manufacturing process. Additionally, the production may require access to reliable energy sources, such as natural gas or electricity, to maintain the high temperatures necessary for glass melting and forming.

Production outputs

The glass tubes produced under HS code 700232 are primarily used as components in a variety of industries, including 853400 Electronic resistors, capacitors, inductors and similar apparatus, 902780 Instruments and apparatus for physical or chemical analysis, and 701990 Other articles of glass, n.e.s.. These specialized glass tubes may also be consumed by manufacturers of 701931 Glass envelopes, open, and glass parts thereof, for electric lamps, cathode-ray tubes or the like and 902300 Instruments, apparatus and models, designed for demonstrational purposes, among other applications.

Revisions to 700232

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 700232. The most recent 1 version of this code (700232) is in the HS v2022 system:

This page shows a legacy version of code 700232 ( HS v2017).

Family tree 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

    graph LR
    A["<a href='/classifications/hs/v2017/70'>70: Glass and glassware</a>"]
A --> B["<a href='/classifications/hs/v2017/7002'>7002: Glass in balls (other than microspheres of heading no. 7018), rods or tubes, unworked</a>"]
B --> C["<a href='/classifications/hs/v2017/700232'>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</a>"]

    B --> D["<a href='/classifications/hs/v2017/700210'>700210: Glass; unworked, in balls (other than microspheres of heading no. 7018)</a>"]
B --> E["<a href='/classifications/hs/v2017/700220'>700220: Glass; unworked, in rods</a>"]
B --> F["<a href='/classifications/hs/v2017/700231'>700231: Glass; unworked, in tubes, of fused quartz or other fused silica</a>"]
B --> G["<a href='/classifications/hs/v2017/700239'>700239: Glass; unworked, in tubes, other than 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, not fused quartz or other fused silica</a>"]

    

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