HS Code for Large Diameter Welded Pipes
The HS Code for large diameter welded pipes is 730511. The MFN duty rate for importing to the US is Free.
| HS Code (6-digit) | 730511 |
|---|---|
| US Duty Rate (MFN) | Free |
| EU Duty Rate (MFN) | 0% |
| Chapter | 73 |
| Heading | 7305 |
| Last Updated | 2026-05 |
Description
Line pipe, longitudinally submerged arc welded, external diameter > 406.4mm
Large diameter longitudinally welded steel line pipe exceeding 406.4mm in external diameter, produced by the submerged arc process.
Frequently Asked Questions
What are the major cost factors beyond the base price for importing large diameter welded line pipe (HTS 730511)?
Beyond the product price, significant costs include anti-dumping/countervailing duties (AD/CVD) which are commonly applied to this product from many countries, and high freight charges due to the pipe's oversized dimensions and weight. Importers should also budget for potential harbor handling fees for oversized cargo and any applicable Section 232 tariffs on steel products.
For importing HTS 730511 large diameter welded line pipe, are there any specific import license or regulatory compliance requirements in the US beyond standard customs entry?
Yes, these pipes are often subject to anti-dumping and countervailing duty (AD/CVD) orders. Importers must be prepared to provide the applicable case number (e.g., A-570-999) and potentially post cash deposits. Furthermore, if used for oil or gas pipelines, compliance with Department of Transportation (DOT) safety standards may be required for eventual use.
For shipping large diameter welded pipes (HTS 730511), what are the critical packaging and stowage requirements to prevent damage during ocean transport?
Due to their size and susceptibility to deformation, these pipes must be stowed on flat, reinforced cradles in the vessel's hold to prevent bending. They typically require protective end caps and robust banding to secure multiple units, and must be clearly marked with the center of gravity for safe handling with specialized lifting gear.
Seasonal Import Trends for Large Diameter Welded Pipe
Import volumes for HTS 730511 exhibit moderate seasonality, typically peaking in Q2 and Q3 (April-September) to align with the Northern Hemisphere construction and infrastructure season. Data from U.S. import statistics shows a consistent pattern where monthly entries can be 15-25% higher in the summer months compared to winter lows. Major projects, such as pipeline installations, often schedule pipe deliveries during this drier period to facilitate ground work. This cyclical demand can influence lead times and spot pricing from key supplying countries like Canada and South Korea.
Anti-Dumping & Countervailing Duty (AD/CVD) Compliance
Imports of large diameter welded pipes under HTS 7305.11.00 are subject to numerous active Anti-Dumping (AD) and Countervailing Duty (CVD) orders from the U.S. Department of Commerce. Key country-specific cases include China (A-570-026, C-570-027), Canada (A-122-857, C-122-858), South Korea (A-580-892, C-580-893), and Turkey. Importers must provide the correct AD/CVD case number at entry and are liable for significant additional duties if orders apply. Regularly check the Federal Register and the Commerce Department's AD/CVD Centralized Electronic Service System (ACCESS) for updates on scope and duty rates.
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