S-Glass Roving for Valve Stem Packing from Canada
S-glass roving, known for superior strength, is used as compressible packing around valve stems in chemical processing plants to prevent leaks. It qualifies for HTS 7019.12.00.40 due to its role as an industrial packing material in the form of rovings, not yet worked into final articles per heading 7006 note. The fused silica content aligns with the broad 'glass' definition in the tariff schedule.
Duty Rate — Canada → United States
14.8%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Test for S-glass tensile strength documentation to support classification; declare exact diameter and twist count to match statistical reporting; pitfall: confusing with chopped strands which fall under 7019.13