What are refractory ceramic goods?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
HS-6 · Subheading
690310
Refractory ceramic goods; containing, by weight, more than 50% of free carbon, excluding those of siliceous fossil meals or similar earths
Heading 6903 — Ceramic goods; (e.g. retorts, crucibles, muffles, nozzles, plugs, supports cupels, tubes, pipes, sheaths, rods and slide gates) excluding those of siliceous fossil meals or of similar siliceous earths
Chapter 69: Ceramic products
Plain-language overview
Use HS-6 690310 when importing or exporting refractory ceramic goods that contain more than 50% free carbon. This includes products like crucibles and tubes designed to withstand high temperatures in industrial applications.
This code specifically covers refractory ceramics, which are essential in processes like metal casting and glass manufacturing. In contrast, HS-6 690320 covers other types of refractory ceramics that do not meet the carbon content requirement.
If you're dealing with products like nozzles or supports made from refractory materials, ensure they are classified under this HS-6 to avoid customs issues. Items with lower carbon content may fall under different classifications.
Understanding the distinction between HS-6 690310 and similar codes is crucial for compliance. For example, products with less than 50% free carbon should be classified elsewhere, affecting duties and regulations.
Keywords & topics
Useful terms traders and brokers use for this HS-6 subheading.
refractory ceramics · crucibles · high-temperature tubes · industrial nozzles · ceramic supports · metal casting · heat-resistant materials · ceramic pipes · slide gates · cupels · laboratory furnaces · thermal treatments · casting processes · ceramic rods
Examples
Drawn from the official tariff wording for this HS-6 subheading. Always confirm against your published schedule and legal notes.
- Crucibles made from refractory ceramics for metal casting
- Refractory tubes used in high-temperature furnaces
- Nozzles designed for molten metal flow in casting processes
- Support rods for ceramic kilns that require high heat resistance
- Muffles used in laboratory furnaces for thermal treatments
- Pipes made from refractory materials for industrial applications
- Slide gates in steelmaking that need to withstand extreme temperatures
- Cupels for precious metal refining processes
Common questions
Frequent classification questions with short practical guidance.
How to classify crucibles under HS codes?
Write down material, use, and product form first, then compare nearby lines before you lock the code.
Are there different types of refractory ceramics?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What is the carbon content requirement for HS-6 690310?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Can I use HS-6 690310 for all ceramic products?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What happens if I misclassify refractory ceramics?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
How to determine the carbon content in ceramics?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
What are the applications of HS-6 690310 products?
Use this as a comparison hint, then confirm the final decision with legal notes and country-specific rules.
Related topics
Common real-world topics that come up during code comparison.
how to classify refractory ceramics for customs
Check the exact product specs and destination-country tariff notes before finalizing the code.
examples of products under HS-6 690310
Use this topic to narrow your shortlist, then validate the final code against legal wording.
difference between HS-6 690310 and 690320
Compare adjacent HS lines and pick the one that matches material, function, and product form most closely.
what materials are considered refractory ceramics
Use this topic to narrow your shortlist, then validate the final code against legal wording.
importing crucibles under HS-6 690310
Check the exact product specs and destination-country tariff notes before finalizing the code.
requirements for refractory ceramic goods classification
Use this as a checklist topic, then confirm legal requirements with your broker or customs advisor.
how to measure free carbon in ceramics
Use this topic to narrow your shortlist, then validate the final code against legal wording.
customs duties for refractory ceramic imports
Check the exact product specs and destination-country tariff notes before finalizing the code.
Questions & answers
For orientation only—the binding text is your national tariff and the WCO nomenclature your country uses.
- What types of products fall under HS-6 690310?
- HS-6 690310 includes refractory ceramic goods like crucibles, tubes, nozzles, and supports that contain more than 50% free carbon.
- How do I know if my ceramic product qualifies for HS-6 690310?
- Check the product's carbon content; it must contain over 50% free carbon to qualify for HS-6 690310.
- What is the difference between HS-6 690310 and HS-6 690320?
- HS-6 690310 is for refractory ceramics with high carbon content, while HS-6 690320 covers those with lower carbon content.
- Can I use HS-6 690310 for all types of ceramics?
- No, only refractory ceramics with more than 50% free carbon should be classified under HS-6 690310.
- What are the risks of misclassifying my ceramic products?
- Misclassification can lead to incorrect duties, potential fines, and delays in customs clearance.
- How can I measure the carbon content in my ceramic goods?
- You can measure carbon content through laboratory testing methods that analyze the material composition.
- What are typical applications for products classified under HS-6 690310?
- Products like crucibles and nozzles are commonly used in metal casting, glass manufacturing, and high-temperature industrial processes.
- Are there specific regulations for importing refractory ceramics?
- Yes, ensure compliance with local regulations and standards for high-temperature materials when importing refractory ceramics.
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