Structural Seamless Steel Hollow Section 15-inch OD 25 mm Wall
Heavy-walled seamless circular hollow profile of nonalloy steel, 381 mm OD and 25 mm wall thickness, used in offshore platform construction. Meets HTS 7304.39.0072 criteria for seamless iron/nonalloy steel tubes with OD 285.8-406.4 mm and walls ≥19 mm. Provides high strength for load-bearing applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If of iron (low carbon content) rather than steel
Lower iron content products without sufficient carbon for steel classification go to heading 7305.
If other than circular cross-section (e.g., square)
Non-circular hollow profiles, seamless or welded, classify under 7306 based on shape, not just dimensions.
If imported as fabricated structures or assemblies
Pipes cut, welded, or fitted into structures (e.g., jacket legs) become Chapter 73 fabricated metal products.
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Import Tips & Compliance
• Declare intended structural use but classify based on form, not application, to prevent shifts to line pipe subheadings
• Anti-dumping duties may apply; check Commerce scope rulings for Chinese-origin hollow sections
• Bundle in sets only if sold as such; individual pipes classify separately from assembled structures
Related Products under HTS 7304.39.00.72
API 5L Grade B Seamless Steel Pipe 16-inch OD 1-inch Wall
This seamless steel pipe of nonalloy steel has an outside diameter of 406.4 mm (16 inches) and a wall thickness of 25.4 mm (1 inch), designed for oil and gas transmission pipelines. It falls under HTS 7304.39.0072 due to its circular cross-section, seamless construction, OD between 285.8 mm and 406.4 mm, and wall thickness of 19 mm or more. Commonly used in high-pressure line pipe applications.
ASTM A106 Grade B Seamless Carbon Steel Pipe 14-inch OD 3/4-inch Wall
A seamless pipe per ASTM A106 specifications for high-temperature service, with 355.6 mm (14-inch) OD and 19 mm wall thickness, made from nonalloy steel. Classified under HTS 7304.39.0072 for its circular cross-section, specified OD range, and thick walls suitable for boiler and pressure applications. Ideal for refineries and power plants.
Heavy Wall Seamless Casing Pipe 12-inch OD 1-inch Wall
Seamless nonalloy steel casing for oil well drilling, featuring 304.8 mm OD and 25.4 mm wall thickness. Fits HTS 7304.39.0072 as a circular seamless tube exceeding 285.8 mm OD up to 406.4 mm with thick walls. Used to line boreholes and support formations.
Pressure Vessel Seamless Pipe 16-inch OD 30 mm Wall
Extra heavy-walled seamless carbon steel pipe for reactor vessels, 406 mm OD and 30 mm thickness. Classified in HTS 7304.39.0072 for nonalloy seamless tubes in the 285.8-406.4 mm OD range with walls over 19 mm. Withstands extreme pressures in petrochemical processing.
Offshore Riser Seamless Steel Pipe 14-inch OD 22 mm Wall
Seamless nonalloy riser pipe for deepwater oil production, 355 mm OD with 22 mm walls. Meets HTS 7304.39.0072 parameters for thick-walled circular seamless steel tubes in the medium-large OD bracket. Corrosion-resistant coating optional for marine environments.
Pile Driving Seamless Steel Pipe 15-inch OD 20 mm Wall
Heavy-duty seamless pipe for foundation piling in bridge construction, 381 mm OD and 20 mm wall. Falls under HTS 7304.39.0072 as a nonalloy seamless circular tube with qualifying dimensions. High impact resistance for hammer-driven installation.