Other
Filtering or purifying machinery for liquids or gases, other
HSN 8421 29 00 (other filtering or purifying machinery and apparatus for liquids or gases) 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 (IEC), bill of entry, commercial invoice, packing list. Certain machinery within Chapter 84 — including specific air filtration or water purification equipment — may fall under sibling tariff lines that do carry compliance obligations; classification accuracy is the principal importer risk.
The absence of compliance at this residual tariff line does not extend to more specifically classified filtering or purifying machinery within heading 8421 — particular sub-lines covering air filters, oil filters, or water treatment apparatus may attract BIS Quality Control Order coverage or environment-related agency clearances. Re-classification by customs on examination triggers retrospective compliance, including detention pending the relevant certification. Verify the precise technical function, fluid type, and end-use application against the full tariff schedule before relying on the absence of compliance here.