Non-plastic
Non-plastic fire clay for refractory and industrial use
HSN 2508 30 10 (non-plastic fire clay) is not covered by a Bureau of Indian Standards Quality Control Order and carries no Partner Government Agency clearance requirement at the tariff-line level. Import follows the standard customs procedure: Importer-Exporter Code, bill of entry, commercial invoice, packing list. Other clays and refractory materials within Chapter 25 — including plastic fire clay, calcined varieties, and chamotte — may be classified under sibling tariff lines that carry distinct compliance obligations.
The principal risk for this tariff line is misclassification: plastic fire clay, calcined fire clay, and chamotte are separately classified within Chapter 25 and may attract different duty rates or compliance requirements. Where customs re-examination determines that the imported material is a calcined or plastic grade, retrospective compliance and potential detention pending re-classification apply. Importers should document plasticity index, alumina content, and firing temperature specifications to substantiate the non-plastic classification at the time of entry.