HS Code 730511

HS code 730511 is the World Customs Organization 6-digit HS 2022 subheading for "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 : Line pipe of a kind used for oil or gas pipelines : Longitudinally submerged arc welded". The first two digits (73) are the chapter — Articles of iron or steel — and digits 3-4 (7305) are the heading. Countries add further digits (8-10) for their national tariff line.

Common products classified under 730511 include LSAW pipe, longitudinal submerged arc welded pipe, oil gas line pipe, large diameter line pipe and similar items matching longitudinally submerged arc welded. The correct code still depends on the product's material, function and intended use.

Duty is set by the destination country, not by the 6-digit HS code alone. Start from the official tariff of your market — USITC HTS (US), TARIC / Access2Markets (EU), GOV.UK Trade Tariff (UK), CBSA (Canada), ABF (Australia) or Singapore Customs — and look up the full national code with China as the country of origin.

The first 6 digits (730511) are the same worldwide under the WCO Harmonized System. Beyond that, each country extends the code (HTS in the US, TARIC in the EU, etc.) and sets its own duty and tax rates.

Treat a supplier-provided code as a clue, not a final classification. It can be incomplete, China-export-specific, or mismatched to your destination's rules. Verify against the official tariff and your product's actual material and use.