HS Code 7305
Large Diameter Welded Steel Pipes
HS code 7305 covers welded iron or steel pipes with an external diameter exceeding 406.4mm, primarily used for long-distance oil, gas, or water pipelines.
HS Code 7305 — Large Diameter Welded Steel Pipes
This code applies to large-scale pipes with a circular cross-section and an external diameter exceeding 406.4 mm (16 inches). These pipes are typically manufactured via longitudinal or spiral welding of steel plates. They are the primary components for long-distance oil, gas, and water transmission pipelines.
What's included
- Submerged arc welded (SAW) pipes
- Spiral-welded steel pipes
- Large-bore line pipe
- API 5L X-grade large pipes
What's excluded
- Pipes with diameter 406.4mm or less → use
7306(Smaller diameter welded pipes are classified under 73.06.)
Common examples
- 36-inch diameter gas pipeline pipe
- Spiral welded water transit pipe
- 24-inch SAW steel line pipe
- Large bore dredging pipe
Frequently asked questions
What does the 406.4mm threshold mean?
It is exactly 16 inches. Pipes larger than this are 7305; smaller pipes fall under 7306.
Trade & shipping notes
- Typical duty range: 5% - 15%
- Documentation: Mill test certificates and pressure ratings (API) are essential for customs clearance.
- Typical shipping mode: Bulk
- Top exporters: China, India, Turkey, South Korea
- Top importers: United States, Australia, Canada, Kazakhstan
Related HS codes
Key takeaway
Critical for large-scale energy infrastructure; threshold for entry is an external diameter > 406.4 mm.
Related HS codes
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