HS Code 7304
Seamless Iron and Steel Tubes
HS code 7304 is used for seamless tubes and pipes of iron or steel, designed for high-pressure industrial applications like oil-drilling and boiler systems.
HS Code 7304 — Seamless Iron and Steel Tubes
This heading covers tubes and pipes that have no longitudinal or spiral seam, created through extrusion or piercing. These are high-strength products used for transporting fluids under high pressure, such as in oil and gas drilling, boilers, and precision mechanical parts. Their lack of a weld makes them more resistant to internal pressure and corrosion.
What's included
- Oil country tubular goods (OCTG)
- Casing and tubing for oil/gas wells
- Cold-drawn seamless precision tubes
- Seamless boiler tubes
What's excluded
- Welded steel pipes → use
7306(Welded pipes have a visible seam and lower pressure rating.) - Cast iron pipes → use
7303(Cast iron is brittle and classified separately.)
Common examples
- Seamless API 5L line pipe
- Cold-drawn hydraulic tube
- Steel casing for oil wells
- Seamless stainless steel pipe
Frequently asked questions
Why are seamless pipes separate from welded pipes?
Seamless pipes are more expensive to manufacture and offer higher structural integrity and pressure resistance compared to welded versions.
Trade & shipping notes
- Typical duty range: 0% - 25%
- Documentation: Often subject to Anti-Dumping Duties (ADD) particularly on imports from China and Korea.
- Typical shipping mode: FCL
- Top exporters: China, Germany, Japan, Italy
- Top importers: United States, Canada, Russia, Kuwait
Related HS codes
Key takeaway
The premium choice for high-pressure, mission-critical industrial applications like energy extraction.
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