Section XV — Base metals and articles of base metal
Chapter 73 — Articles of iron or steel
Heading 7305 — Other tubes and pipes (for example, welded, riveted or similarly closed), having circular crosssections, the external diameter of which exceeds 406.4 mm, of iron or steel.
National subdivision 7305.3 — Other, welded:
Subheading 7305.39 — Other
HS code
7305.39.10 High-pressure hydro-electric conduits of steel whether or not reinforced
Last Verified Date - 1 October 2026
Common commodities
High pressure spiral-welded penstock pipesHelical reinforced water conduits for hydropowerLarge diameter hydroelectric power penstocksUnreinforced high pressure helical pipesSpiral welded steel conduit for hydropower generationLarge bore spiral-welded penstock pipeHigh pressure spiral-welded hydro conduitHelical reinforced water pipe for power plantsLarge diameter helical penstock in hydropower systemsSpiral-welded high pressure hydroelectric penstock