Heavy Wall Seamless Steel Casing Pipe 10-inch OD 30mm Thick
Seamless non-alloy steel casing pipe with 254 mm OD and 30 mm wall thickness, used for oil well drilling to line boreholes. Classified under HTS 7304.39.0056 for its iron/non-alloy steel composition, circular seamless profile, and thick walls over 19 mm in the 190.5-285.8 mm OD range. Essential for structural support in petroleum extraction.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of alloy steel
Alloy steel seamless tubes (e.g., with chromium/molybdenum) are in a separate subheading under 7304.29.
If When imported mounted on or as integral to machinery
Parts of oil/gas drilling machines may classify under machinery Chapter 84 if not imported as standalone tubes.
If OD under 190.5 mm
Smaller diameter seamless tubes in the same wall thickness range use earlier statistical breaks.
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Import Tips & Compliance
• Provide hydrostatic test certificates proving pressure integrity; check for anti-dumping duties on casing from certain origins
• Pitfall: confusing casing with tubing—casing has thicker walls
• Include chemical composition analysis in entry docs
Related Products under HTS 7304.39.00.56
Seamless API 5L Grade B Steel Pipe 8-inch OD 25mm Wall
A seamless steel pipe of non-alloy steel with 203.2 mm outside diameter and 25 mm wall thickness, designed for oil and gas pipeline transmission. It falls under HTS 7304.39.0056 due to its circular cross-section, seamless construction, and specified dimensions exceeding 190.5 mm OD and 19 mm wall thickness. Commonly used in high-pressure fluid transport in the energy sector.
Non-Alloy Seamless Boiler Tube 9-inch OD 22mm Wall
Seamless tube of iron or non-alloy steel, 228.6 mm OD with 22 mm wall thickness, for high-temperature boiler applications in power plants. HTS 7304.39.0056 applies to its circular cross-section, seamless manufacture, and dimension specs fitting the heavy-duty tube category. Withstands steam pressures in industrial heating systems.
Structural Seamless Steel Pipe 11-inch OD 35mm Wall
Heavy seamless pipe of non-alloy steel, 279.4 mm OD and 35 mm wall, for structural columns in construction and bridges. Fits HTS 7304.39.0056 as other circular seamless tubes of iron/non-alloy steel with OD 190.5-285.8 mm and walls ≥19 mm. Provides high load-bearing capacity.
Mechanical Seamless Steel Tube 7-inch OD 20mm Thick
Seamless non-alloy steel tube, 177.8 mm OD (just over 190.5 mm adjusted spec) with 20 mm wall for hydraulic cylinders and machinery. Under HTS 7304.39.0056 for seamless circular iron/steel tubes in thick-wall, mid-OD category. Used in heavy equipment manufacturing.
Pressure Line Pipe Seamless 8.5-inch OD 28mm Wall
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