Harmonized System Code Classification

6903900050 is a specific HS code that falls under the broader category of refractory ceramic goods. This code refers to other refractory ceramic goods, excluding those made from siliceous fossil meals or similar siliceous earths. Examples of such goods include retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods, and slide gates.

These products are typically used in high-temperature environments, such as in metallurgy, glass manufacturing, or chemical processing, due to their ability to withstand extreme heat without degrading.

Examples of products under this HS code include:

  • Ceramic crucibles used in laboratories or foundries
  • Refractory ceramic tubes for high-temperature applications
  • Ceramic nozzles used in industrial furnaces
  • Ceramic slide gates for controlling molten metal flow
  • Ceramic support rods used in industrial heating systems
  • Ceramic muffles used in kilns for even heat distribution
  • Ceramic sheaths for protecting high-temperature components
  • Ceramic retorts used in chemical processes
  • Ceramic pipes for conveying molten materials
  • Ceramic plugs used in high-temperature systems for sealing purposes

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